Ford Explorer: Climate Control System - General Information / Diagnosis and Testing - Climate Control System

Ford Explorer 2020-2022 Service Manual / Electrical / Climate Control System / Climate Control System - General Information / Diagnosis and Testing - Climate Control System

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  Diagnostic Trouble Code Chart


Module   DTC Description Action
  ACCM B11EE:19 A/C Compressor: Circuit Current Above Threshold   GO to Pinpoint Test AI
  ACCM B11EE:41 A/C Compressor: General Checksum Failure   GO to Pinpoint Test AR
  ACCM B11EE:4B A/C Compressor: Over Temperature   GO to Pinpoint Test AI
  ACCM B11EE:92 A/C Compressor: Performance or Incorrect Operation   GO to Pinpoint Test AI
  ACCM P0562:00 System Voltage Low: No Sub Type Information   GO to Pinpoint Test AI
  ACCM P0563:00 System Voltage High: No Sub Type Information   GO to Pinpoint Test AI
  ACCM P0AFA:16 Hybrid/EV Battery System Voltage Low: Circuit Voltage Below Threshold   GO to Pinpoint Test AI
  ACCM P0AFB:17 Hybrid/EV Battery System Voltage High: Circuit Voltage Above Threshold   GO to Pinpoint Test AI
  ACCM P0AFB:1C Hybrid/EV Battery System Voltage High: Circuit Voltage Out of Range   GO to Pinpoint Test AI
  ACCM U0001:88 High Speed CAN Communication Bus: Bus Off   GO to Pinpoint Test AO
  ACCM U0100:00 Lost Communication with ECM/PCM "A": No Sub Type Information   GO to Pinpoint Test AK
  ACCM U0111:00 Lost Communication With Battery Energy Control Module "A": No Sub Type Information   GO to Pinpoint Test AL
  ACCM U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test Q
  ACCM U3000:04 Control Module: System Internal Failure   GO to Pinpoint Test AR
  ACCM U3000:42 Control Module: General Memory Failure   GO to Pinpoint Test AR
  ACCM U3000:49 Control Module: Internal Electronic Failure   GO to Pinpoint Test AR
  BCMC B3A01:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AU
  BCMC B3A02:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AU
  BCMC B3A03:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AU
  BCMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AS
  BCMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AS
  BCMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AS
  BCMC P2CFC:00 A/C Clutch Control Circuit: No Sub Type Information   GO to Pinpoint Test B
  BCMC P2CFD:00 A/C Clutch Control Circuit Low: No Sub Type Information   GO to Pinpoint Test B
  BCMC P2CFE:00 A/C Clutch Control Circuit: No Sub Type Information   GO to Pinpoint Test B
  BCMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AT
  BCMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AT
  BCMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AT
  HVAC B102E:11 Air Quality Sensor: Circuit Short To Ground   GO to Pinpoint Test X
  HVAC B102E:15 Air Quality Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test X
  HVAC B102E:92 Air Quality Sensor: Performance or Incorrect Operation   GO to Pinpoint Test X
  HVAC B1081:07 Left Temperature Damper Motor: Mechanical Failure   GO to Pinpoint Test G
  HVAC B1081:11 Left Temperature Damper Motor: Circuit Short To Ground   GO to Pinpoint Test G
  HVAC B1081:12 Left Temperature Damper Motor: Circuit Short To Battery   GO to Pinpoint Test G
  HVAC B1081:13 Left Temperature Damper Motor: Circuit Open   GO to Pinpoint Test G
  HVAC B1082:07 Right Temperature Damper Motor: Mechanical Failure   GO to Pinpoint Test H
  HVAC B1082:11 Right Temperature Damper Motor: Circuit Short To Ground   GO to Pinpoint Test H
  HVAC B1082:12 Right Temperature Damper Motor: Circuit Short To Battery   GO to Pinpoint Test H
  HVAC B1082:13 Right Temperature Damper Motor: Circuit Open   GO to Pinpoint Test H
  HVAC B1083:07 Recirculation Damper Motor: Mechanical Failure   GO to Pinpoint Test J
  HVAC B1083:11 Recirculation Damper Motor: Circuit Short To Ground   GO to Pinpoint Test J
  HVAC B1083:12 Recirculation Damper Motor: Circuit Short To Battery   GO to Pinpoint Test J
  HVAC B1083:13 Recirculation Damper Motor: Circuit Open   GO to Pinpoint Test J
  HVAC B1086:07 Air Distribution Damper Motor: Mechanical Failure   GO to Pinpoint Test K
  HVAC B1086:11 Air Distribution Damper Motor: Circuit Short To Ground   GO to Pinpoint Test K
  HVAC B1086:12 Air Distribution Damper Motor: Circuit Short To Battery   GO to Pinpoint Test K
  HVAC B1086:13 Air Distribution Damper Motor: Circuit Open   GO to Pinpoint Test K
  HVAC B10AF:11 Blower Fan Relay: Circuit Short To Ground   GO to Pinpoint Test O
  HVAC B10AF:12 Blower Fan Relay: Circuit Short To Battery   GO to Pinpoint Test P
  HVAC B10AF:13 Blower Fan Relay: Circuit Open   GO to Pinpoint Test O
  HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery or Open   GO to Pinpoint Test O
  HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery or Open   GO to Pinpoint Test P
  HVAC B10B3:11 Right Panel Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test Z
  HVAC B10B3:15 Right Panel Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test Z
  HVAC B10B4:11 Right Floor Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test Z
  HVAC B10B4:15 Right Floor Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test Z
  HVAC B10B5:11 Left Panel Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test Z
  HVAC B10B5:15 Left Panel Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test Z
  HVAC B10B6:11 Left Floor Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test Z
  HVAC B10B6:15 Left Floor Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test Z
  HVAC B10B7:11 Rear Air Discharge Temperature: Circuit Short To Ground   GO to Pinpoint Test AF
  HVAC B10B7:15 Rear Air Discharge Temperature: Circuit Short To Battery or Open   GO to Pinpoint Test AF
  HVAC B10B8:63 Push Buttons: Circuit / Component Protection Time-Out   GO to Pinpoint Test AH
  HVAC B10B9:12 Blower Control: Circuit Short To Battery   GO to Pinpoint Test O
  HVAC B10B9:14 Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test O
  HVAC B10B9:14 Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test P
  HVAC B10BA:12 Rear Blower Control: Circuit Short To Battery   GO to Pinpoint Test AC
  HVAC B10BA:14 Rear Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test AC
  HVAC B10BA:14 Rear Blower Control: Circuit Short To Ground or Open   GO to Pinpoint Test AD
  HVAC B11E3:07 Rear HVAC Damper Motor: Mechanical Failure   GO to Pinpoint Test AF
  HVAC B11E3:11 Rear HVAC Damper Motor: Circuit Short To Ground   GO to Pinpoint Test AF
  HVAC B11E3:12 Rear HVAC Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AF
  HVAC B11E3:13 Rear HVAC Damper Motor: Circuit Open   GO to Pinpoint Test AF
  HVAC B11E4:07 Rear Air Distribution Damper Motor: Mechanical Failure   GO to Pinpoint Test AE
  HVAC B11E4:11 Rear Air Distribution Damper Motor: Circuit Short to Ground   GO to Pinpoint Test AE
  HVAC B11E4:12 Rear Air Distribution Damper Motor: Circuit Short To Battery   GO to Pinpoint Test AE
  HVAC B11E4:13 Rear Air Distribution Damper Motor: Circuit Open   GO to Pinpoint Test AE
  HVAC B11E5:11 Left HVAC Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test G
  HVAC B11E5:15 Left HVAC Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test G
  HVAC B11E6:11 Right HVAC Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test H
  HVAC B11E6:15 Right HVAC Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test H
  HVAC B11E7:11 Air Distribution Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test K
  HVAC B11E7:15 Air Distribution Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test K
  HVAC B11F0:11 Air Intake Damper Position Sensor: Circuit Short To Ground   GO to Pinpoint Test J
  HVAC B11F0:15 Air Intake Damper Position Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test J
  HVAC B12CA:11 Start/Stop "Eco-Start" Status Indicator: Circuit Short To Ground   GO to Pinpoint Test AG
  HVAC B12CA:15 Start/Stop "Eco-Start" Status Indicator: Circuit Short To Battery or Open   GO to Pinpoint Test AG
  HVAC B1A61:11 Cabin Temperature Sensor: Circuit Short To Ground   GO to Pinpoint Test E
  HVAC B1A61:15 Cabin Temperature Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test E
  HVAC B1A63:11 Right Solar Sensor: No Sub Type Information   GO to Pinpoint Test Y
  HVAC B1A63:15 Right Solar Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test Y
  HVAC B1A64:11 Left Solar Sensor: No Sub Type Information   GO to Pinpoint Test Y
  HVAC B1A64:15 Left Solar Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test Y
  HVAC B1A69:11 Humidity Sensor: Circuit Short To Ground   GO to Pinpoint Test E
  HVAC B1A69:15 Humidity Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test E
  HVAC B1A69:92 Humidity Sensor: Performance or Incorrect Operation   GO to Pinpoint Test E
  HVAC B1B71:11 Evaporator Temperature Sensor: Circuit Short To Ground   GO to Pinpoint Test F
  HVAC B1B71:15 Evaporator Temperature Sensor: Circuit Short To Battery or Open   GO to Pinpoint Test F
  HVAC B1B7D:11 Rear Air Distribution Actuator: Circuit Short to Ground   GO to Pinpoint Test AE
  HVAC B1B7D:15 Rear Air Distribution Actuator: Circuit Short To Battery or Open   GO to Pinpoint Test AE
  HVAC C1B14:11 Sensor Supply Voltage A: Circuit Short to Ground   GO to Pinpoint Test AB
  HVAC C1B14:12 Sensor Supply Voltage A: Circuit Short to Battery   GO to Pinpoint Test AB
  HVAC U0100:00 Lost Communication with ECM/PCM "A": No Sub Type Information   GO to Pinpoint Test AK
  HVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test Q
  HVAC U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information   GO to Pinpoint Test R
  HVAC U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub-Type Information   GO to Pinpoint Test S
  HVAC U0165:00 Lost Communication With HVAC Control Module - Rear: No Sub Type Information   GO to Pinpoint Test U
  HVAC U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information   GO to Pinpoint Test V
  HVAC U0401:00 Invalid Data Received from ECM/PCM A: No Sub-Type Information   GO to Pinpoint Test AP
  HVAC U0401:82 Invalid Data Received from ECM/PCM A: Alive / Sequence Counter Incorrect / Not Updated   GO to Pinpoint Test AP
  HVAC U0422:68 Invalid Data Received from Body Control Module: Event Information   GO to Pinpoint Test AP
  HVAC U0422:81 Invalid Data Received from Body Control Module: Invalid Serial Data Received   GO to Pinpoint Test AP
  HVAC U0452:82 Invalid Data Received From Restraints Control Module: Alive / Sequence Counter Incorrect / Not Updated   GO to Pinpoint Test AP
  HVAC U0466:68 Invalid Data Received From HVAC Control Module - Rear: Event Information   GO to Pinpoint Test AP
  HVAC U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information   GO to Pinpoint Test W
  HVAC U2024:51 Control Module Cal-Config Data: Not Programmed   GO to Pinpoint Test AQ
  HVAC U2100:00 Initial Configuration Not Complete: No Sub Type Information   GO to Pinpoint Test AQ
  HVAC U3000:41 Control Module: General Checksum Failure   GO to Pinpoint Test AR
  HVAC U3000:49 Control Module: Internal Electronic Failure   GO to Pinpoint Test AR
  HVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold   GO to Pinpoint Test AM
  HVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold   GO to Pinpoint Test AN
  PCM P0532:00 A/C Refrigerant Pressure Sensor A Circuit Low: No Sub Type Information   GO to Pinpoint Test A
  PCM P0533:00 A/C Refrigerant Pressure Sensor A Circuit High: No Sub Type Information   GO to Pinpoint Test A
  PCM P0645:00 A/C Clutch Relay Control Circuit: No Sub Type Information   GO to Pinpoint Test B
  PCM P06A0:00 Variable Compressor Control Circuit: No Sub Type Information   GO to Pinpoint Test C
  PCM P1464:00 A/C Demand Out Of Self Test Range: No Sub Type Information   GO to Pinpoint Test N
  PCM P193E:00 A/C Clutch Request Signal: No Sub Type Information   GO to Pinpoint Test AA
  PCM P2183:00 Engine Coolant Temperature Sensor 2: Circuit Range/Performance   GO to Pinpoint Test AV
  PCM P2184:00 Engine Coolant Temperature Sensor 2: Circuit Low   GO to Pinpoint Test AV
  PCM P2185:00 Engine Coolant Temperature Sensor 2: Circuit High   GO to Pinpoint Test AV
  PCM P2186:00 Engine Coolant Temperature Sensor 2: Circuit Intermittent/Erratic   GO to Pinpoint Test AV
  PCM P2600:00 Coolant Pump "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test D
  PCM P2601:00 Coolant Pump "A" Control Circuit Performance/Stuck Off: No Sub Type Information   GO to Pinpoint Test D
  PCM P2602:00 Coolant Pump "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test D
  PCM P2603:00 Coolant Pump "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test D
  PCM P26BE:00 Engine Coolant Bypass Valve "D" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AX
  PCM P26BF:00 Engine Coolant Bypass Valve "D" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AX
  RHVAC B10B8:63 Push Buttons: Circuit / Component Protection Time-Out   GO to Pinpoint Test AH
  RHVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test Q
  RHVAC U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information   GO to Pinpoint Test T
  RHVAC U3000:41 Control Module: General Checksum Failure   GO to Pinpoint Test AR
  RHVAC U3000:42 Control Module: General Memory Failure   GO to Pinpoint Test AR
  RHVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold   GO to Pinpoint Test AM
  RHVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold   GO to Pinpoint Test AN
  SOBDMC P01EB:96 Engine Coolant Heater "A" Control Circuit Performance: Component Internal Failure   GO to Pinpoint Test AJ
  SOBDMC P0531:00 A/C Refrigerant Pressure Sensor "A" Circuit Range/Performance: No Sub Type Information   GO to Pinpoint Test A
  SOBDMC P0534:00 A/C Refrigerant Charge Loss: No Sub Type Information   GO to Pinpoint Test A
  SOBDMC P0D6D:00 A/C Compressor Motor Voltage "A" Low: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P0D6F:00 A/C Compressor Motor Current High: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P0D71:00 A/C Compressor Control Module Internal Temperature Sensor Performance: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AS
  SOBDMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AS
  SOBDMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AS
  SOBDMC P26FD:00 A/C Compressor Internal Control Module Performance: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P2D41:00 A/C Compressor Motor Voltage "B" Performance: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P2D42:00 A/C Compressor Motor Voltage "B" Low: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P2D44:00 A/C Compressor Motor Performance: No Sub Type Information   GO to Pinpoint Test AI
  SOBDMC P2DA4:00 Coolant Heater "A" Internal Control Module Performance: No Sub Type Information   GO to Pinpoint Test AJ
  SOBDMC P2DA5:00 Coolant Heater "A" Supply Voltage Circuit: No Sub Type Information   GO to Pinpoint Test AJ
  SOBDMC P2DA6:00 Coolant Heater "A" Over Temperature: No Sub Type Information   GO to Pinpoint Test AJ
  SOBDMC P2DA7:00 Coolant Heater "A" Internal Control Module Control Module System Voltage: No Sub Type Information   GO to Pinpoint Test AJ
  SOBDMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information   GO to Pinpoint Test AT
  SOBDMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information   GO to Pinpoint Test AT
  SOBDMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information   GO to Pinpoint Test AT
  SOBDMC U069E:81 Lost Communication With Coolant Heater "A": Invalid Serial Data Received   GO to Pinpoint Test AJ
  SOBDMC U069E:87 Lost Communication With Coolant Heater "A": Missing Messages   GO to Pinpoint Test AJ

Symptom Charts

Symptom Chart – Climate Control Systems

NOTE: Some Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs) may inhibit Air Conditioning (A/C) operation. If any Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs) are retrieved, diagnose those first. Refer to the Diagnostic Trouble Code (DTC) Chart.

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Actions
Unable to duplicate the customer concern and no Diagnostic Trouble Codes (DTCs) present   GO to Pinpoint Test I
A module does not respond to the diagnostic scan tool  
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
Externally Controlled Variable Displacement Compressor (EVDC) poor performance/does not operate correctly   GO to Pinpoint Test C
Insufficient Air Conditioning (A/C) cooling   GO to Pinpoint Test AY
The A/C is inoperative NON HEV   GO to Pinpoint Test M
The A/C is always on — A/C mode always commanded on NON HEV   GO to Pinpoint Test N
The A/C pressure relief valve is discharging   GO to Pinpoint Test AW
ACCM A/C ELECTRIC COMPRESSOR INOPERATIVE   GO to Pinpoint Test AI
The air inlet door is inoperative   GO to Pinpoint Test J
The front blower motor is inoperative   GO to Pinpoint Test O
The front blower motor does not operate correctly   GO to Pinpoint Test P
The rear blower motor is inoperative   GO to Pinpoint Test AC
The rear blower motor does not operate correctly   GO to Pinpoint Test AD
Incorrect or erratic direction of airflow from outlets on front system   GO to Pinpoint Test K
Incorrect or erratic direction of airflow from outlets on rear system   GO to Pinpoint Test AE
Insufficient, erratic or no heat   GO to Pinpoint Test L
Reduced outlet airflow   GO to Pinpoint Test AZ
The temperature control is inoperative or does not operate correctly – driver side   GO to Pinpoint Test G
The temperature control is inoperative or does not operate correctly – passenger side   GO to Pinpoint Test H
The rear temperature control is inoperative or does not operate correctly   GO to Pinpoint Test AF
The temperature setpoint does not repeat after setting the ignition to OFF INSTALL a new HVAC control module. REFER to the appropriate procedure in Group 412-00.
NVH when the A/C is on   GO to Pinpoint Test BA

Pinpoint Tests


PINPOINT TEST A : P0531, P0532, P0533, P0534

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

A/C Pressure Transducer, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
SOBDMC P0531:00 A/C Refrigerant Pressure Sensor "A" Circuit Range/Performance: No Sub Type Information This DTC sets if the feedback voltage is lower than expected.
PCM P0532:00 A/C Refrigerant Pressure Sensor "A" Circuit Low: No Sub Type Information This DTC sets if the feedback voltage is lower than expected.
PCM P0533:00 A/C Refrigerant Pressure Sensor "A" Circuit High: No Sub Type Information The A/C pressure transducer inputs a feedback voltage to the PCM. This DTC sets if the feedback voltage is greater than expected.
SOBDMC P0534:00 A/C Refrigerant System "A" Charge Loss: No Sub Type Information This DTC sets if the refrigerant charge is low.

Possible Sources

  • Wiring, terminals or connectors
  • A/C pressure transducer
  • PCM

Visual Inspection and Pre-checks

  • Inspect for loose or corroded A/C pressure transducer connections.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
A1 COMPARE THE PCM (POWERTRAIN CONTROL MODULE) PRESSURE SENSOR PID (PARAMETER IDENTIFICATION) WITH THE MANIFOLD GAUGE SET READINGS

NOTE: The following pinpoint test step is tested in ambient temperature of approximately 21.1°C (70°F). As ambient temperatures near 38°C (100.4°F), the pressure value difference increases above ± 15 psi (103 kPa) range

  • Allow the vehicle exterior and interior to stabilize to ambient temperature. This can take a soak period of at least 6 hours.
  • Connect the manifold gauge set.
  • Ignition ON.
  • Access the  PCM  and monitor the  ACP_PRESS (kPa)  PID


Are the pressure values of the manifold gauge set and the PID, dependent upon the ambient temperatures, within ± 103 kPa (15 psi)?
Yes IGNORE the Diagnostic Trouble Codes (DTCs). REFER to the Symptom Chart in this section.
No GO to A2

A2 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3L), C1551B (3.0L) or C175B (3.3L).
  • Disconnect A/C pressure transducer C1260 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1260-1   Ground
      C1260-2   Ground
      C1260-3   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to A3

A3 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1260-1   Ground
      C1260-2   Ground
      C1260-3   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to A4
No REPAIR the circuit.

A4 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1260-1   C1381B-26
      C1260-2   C1381B-30
      C1260-3   C1381B-13

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1260-1   C1551B-28
      C1260-2   C1551B-69
      C1260-3   C1551B-82

    Click to display connectors

      3.3L


    Positive Lead Measurement / Action Negative Lead
      C1260-1   C175B-28
      C1260-2   C175B-69
      C1260-3   C175B-82

Are the resistances less than 3 ohms?
Yes GO to A5
No REPAIR the circuit.

A5 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1260-1   C1260-2
      C1260-1   C1260-3
      C1260-2   C1260-3

Are the resistances greater than 10,000 ohms?
Yes INSTALL a new A/C pressure transducer. REFER to the appropriate procedure in Group 412-00. CLEAR codes and TEST the system for normal operation. If the concern is still present, GO to A6
No REPAIR the circuits.

A6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B : P0645:00, P2CFC:00, P2CFD:00, P2CFE:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

When A/C is requested and A/C line pressures allow, the PCM grounds the clutch control circuit that is hardwired to the A/C clutch control input processing in the BCMC. For additional information on A/C Request, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0645:00 A/C Clutch Relay Control Circuit: No Sub Type Information Sets when the PCM grounds the relay circuit and more current than expected is detected on the relay circuit. The DTC also sets when the relay circuit is off and voltage is detected on the relay circuit.
BCMC P2CFC:00 A/C Clutch Control Circuit: No Sub Type Information BCMC reports the clutch control circuit open.
BCMC P2CFD:00 A/C Clutch Control Circuit Low: No Sub Type Information BCMC reports the clutch control circuit short to ground.
BCMC P2CFE:00 A/C Clutch Control Circuit High: No Sub Type Information BCMC reports the clutch control circuit short to power.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • A/C clutch relay (non-serviceable, part of the BCMC)
  • BCMC
  • PCM
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
B1 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY COIL CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3L), C1551B (3.0L) or C175B (3.3L).
  • Disconnect BCMC C1035B .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to B2

B2 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY COIL CONTROL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B3
No REPAIR the circuit.

B3 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY COIL CONTROL CIRCUIT FOR AN OPEN
  • For vehicles equipped with a 2.3L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C1381B-62
  • For vehicles equipped with a 3.0L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C1551B-19
  • For vehicles equipped with a 3.3L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C175B-19

Is the resistance less than 3 ohms?
Yes CLEAR codes, CARRY OUT the BCMC self-test and the PCM self-test. If Diagnostic Trouble Code P0645:00 returns, GO to B4
If Diagnostic Trouble Codes P2CFC:00, P2CFD:00 or P2CFE:00 returns, GO to B5
No REPAIR the circuit.

B4 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

B5 CHECK FOR CORRECT BCMC (BODY CONTROL MODULE C) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCMC electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all BCMC electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCMC.
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST C : P06A0

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The externally controlled variable displacement compressor is electronically controlled by the PCM. The PCM pulse width modulates the ground to the externally controlled variable displacement compressor to change the displacement of the A/C compressor. REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P06A0:00 Variable A/C Compressor Control Circuit: No Sub Type Information This DTC sets when the PCM senses unexpected voltage on the sensor feedback circuit, indicating a short to voltage, an open circuit or an open sensor.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • Low refrigerant charge
  • A/C compressor
  • PCM

Visual Inspection and Pre-checks

  • Inspect for loose or corroded A/C compressor connections.
  • Make sure BCMC fuse 14 (15A) is OK.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
C1 EXTERNALLY CONTROLLED VARIABLE DISPLACEMENT COMPRESSOR (EVDC) PERFORMANCE CHECK WITH THE AC COMPRESSOR ELECTRONIC CONTROL VALVE TESTER

NOTE: The following pinpoint test step uses the EVDC100 Electronic Variable Displacement A/C Compressor Control Valve Tester, available on the Ford Rotunda website.

NOTE: Proper Air Conditioning (A/C) system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21.1°C (70°F).

  • Test the EVDC compressor displacement, following the instructions in the user manual supplied with the Model EVDC100 A/C Compressor Electronic Control Valve Tester.

Did the suction low side pressure decrease or the high side pressure increase?
Yes The Externally Controlled Variable Displacement Compressor (EVDC) is able to change the displacement. Do not replace the compressor.
If DTC P06A0 is present, GO to C2
If DTC P06A0 is not present, CHECK refrigerant charge amount. REFER to the appropriate General Procedure in Group 412-00.
No GO to C2

C2 CHECK FOR VOLTAGE TO THE A/C (AIR CONDITIONING) COMPRESSOR CONTROL SOLENOID
  • Ignition OFF.
  • Disconnect Externally controlled variable displacement compressor C1110 .
  • Disconnect PCM C1381B (2.3L), C1551B (3.0L) or C175B (3.3L).
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1110-1   Ground

Is the voltage greater than 11 volts?
Yes GO to C3
No VERIFY BCMC fuse 14 (15A) is OK.
If OK, REPAIR the circuit.
If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

C3 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR DISPLACEMENT CONTROL VALVE CIRCUIT FOR A SHORT TO VOLTAGE
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1110-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to C4

C4 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR DISPLACEMENT CONTROL VALVE CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1110-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to C5
No REPAIR the circuit.

C5 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR DISPLACEMENT CONTROL VALVE CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1110-2   C1381B-59

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1110-2   C1551B-79

    Click to display connectors

      3.3L


    Positive Lead Measurement / Action Negative Lead
      C1110-2   C175B-79

Is the resistance less than 3 ohms?
Yes INSTALL a new A/C compressor. REFER to the appropriate procedure in Group 412-00.
CLEAR the DTC and CARRY OUT the PCM self-test. If the DTC returns, GO to C6
No REPAIR the circuit.

C6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST D : INSUFFICIENT HEAT IN AUTO START-STOP MODE ONLY

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Cabin Heater Coolant Pump, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P2600:00 Coolant Pump "A" Control Circuit/Open: No Sub Type Information This DTC sets when the PCM senses an open on the cabin heater coolant pump circuits.
PCM P2601:00 Coolant Pump "A" Control Circuit Performance/Stuck Off: No Sub Type Information
  • This DTC sets when the PCM senses any of the following conditions:
  • Dry-Run leads to cabin heater coolant pump running without resistance
  • Over Temperature
  • Over/Under Voltage
  • Impeller Stall
  • Impeller Speed below minimum speed
  • Internal Error
PCM P2602:00 Coolant Pump "A" Control Circuit Low: No Sub Type Information This DTC sets when the PCM senses low voltage on the PWM circuit when commanding it high, indicating a short to ground to the cabin heater coolant pump.
PCM P2603:00 Coolant Pump "A" Control Circuit High: No Sub Type Information This DTC sets when the PCM senses low voltage on the PWM circuit when commanding it high, indicating an open circuit to the cabin heater coolant pump.

Possible Sources

  • Wiring, terminals or connectors
  • Low coolant or air in the coolant system
  • Cabin heater coolant pump
  • PCM

Visual Inspection and Pre-checks

  • Inspect for loose or corroded PCM and A/C compressor connections.
  • Make sure BCMC fuse 14 (15A) is OK.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
D1 CHECK THE CABIN HEATER COOLANT PUMP

NOTE: The engine must be auto-stopped to request the cabin heater coolant pump on. Further information can be found in the Owner's Literature for full Auto Start-Stop enabling/disabling.

  • Start the vehicle and allow engine to reach normal operating temperatures.
  • Using the HVAC controls, select panel mode, set temperature to full hot and set blower speed to low.
  • Drive the vehicle above 3 mph (4 km/h).
  • Stop the vehicle on a level surface.
  • Make sure that the steering wheel is set to the straight ahead position.
  • Keep the transmission selector lever in position D, brake pedal pressed and doors closed.
  • Monitor the coolant pump status PID for at least 1 minute.
  • Access the  PCM  and monitor the  COOLPMP_A_STAT  PID


Does the cabin heater coolant pump turn on?
Yes GO to D5
No GO to D2

D2 CHECK THE CABIN HEATER COOLANT PUMP CIRCUITS FOR A SHORT TO VOLTAGE
  • Disconnect BCMC fuse 14 (15A).
  • Disconnect PCM C1381B (2.3L) or C1551E (3.0L).
  • Disconnect Cabin heater coolant pump C1450 (2.3L) or C1812 (3.0L).
  • Ignition ON.
  • Measure:
    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1450-1   Ground
      C1450-2   Ground
      C1450-3   Ground

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1812-1   Ground
      C1812-2   Ground
      C1812-3   Ground

Is there any voltage present?
Yes REPAIR the circuit.
No GO to D3

D3 CHECK THE CABIN HEATER COOLANT PUMP CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1450-2   Ground
      C1450-3   Ground

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1812-2   Ground
      C1812-3   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to D4
No REPAIR the circuit.

D4 CHECK THE CABIN HEATER COOLANT PUMP CIRCUITS FOR AN OPEN
  • Disconnect BCMC C1035B .
  • Measure:
    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1450-1   Ground

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1812-1   Ground

    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1450-2   C1035B-44

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1812-2   C1035B-44

    Click to display connectors

      2.3L


    Positive Lead Measurement / Action Negative Lead
      C1450-3   C1381B-20

    Click to display connectors

      3.0L


    Positive Lead Measurement / Action Negative Lead
      C1812-3   C1551E-60

Are the resistances less than 3 ohms?
Yes GO to D5
No REPAIR the circuit.

D5 CHECK THE ENGINE COOLANT LEVEL

NOTE: Allow the engine to cool before checking the engine coolant level.

  • Visually inspect the engine coolant level at the degas bottle.

Is the engine coolant level within specifications?
Yes GO to D6
No Refer to the appropriate section in Group 303 for the procedure.

D6 CLEAR ALL PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES
  • Connect all disconnected connectors. Make sure they seat and latch correctly.
  • Ignition ON.
  • Using a diagnostic scan tool, CLEAR all PCM Diagnostic Trouble Codes (DTCs).
  • NOTE: The engine must be auto-stopped to request the cabin heater coolant pump on. Further information can be found in the Owner's Literature for full Auto Start-Stop enabling/disabling. Start the vehicle and allow engine to reach normal operating temperatures.
  • Using the HVAC controls, select panel mode, set temperature to full hot and set blower speed to low.
  • Drive the vehicle above 3 mph (4 km/h).
  • Stop the vehicle on a level surface.
  • Make sure that the steering wheel is set to the straight ahead position.
  • Keep the transmission selector lever in position D, brake pedal pressed and doors closed.
  • Monitor the coolant pump status PID for at least 1 minute.
  • Access the  PCM  and monitor the  COOLPMP_A_STAT  PID


Does the cabin coolant pump turn on?
Yes If the cabin coolant pump runs for 10 seconds on and 10 seconds off, PURGE the air from the coolant system. Refer to the appropriate section in Group 303 for the procedure.
If the cabin coolant pump runs normally, the system is operating correctly at this time. The concern may have been caused by pump connections. ADDRESS the root cause of any connector or pin issues.
No INSTALL a new cabin heater coolant pump. REFER to the appropriate procedure in Group 412-00.
TEST the system for normal operation. If the concern is still present, GO to D7

D7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PCM connectors.
  • Repair:
    • corrosion (replace connector or terminals – clean module pins)
    • damaged or bent pins – replace terminals/pins
    • pushed-out pins – replace pins as necessary
  • Connect the PCM connectors. Make sure they seat and latch correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST E : B1A61:11, B1A61;15, B1A69:11, B1A69:15, B1A69:92

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

In-Vehicle Temperature and Humidity Sensor, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1A61:11 Cabin Temperature Sensor: Circuit Short To Ground Module senses lower than expected voltage on the temperature sensor feedback circuit, indicating a short to ground.
HVAC B1A61:15 Cabin Temperature Sensor: Circuit Short To Battery Or Open Module senses unexpected voltage on the circuit for the cabin temperature sensor.
HVAC B1A69:11 Humidity Sensor: Circuit Short To Ground Module senses no voltage on the circuit for the humidity sensor, indicating a short to ground.
HVAC B1A69:15 Humidity Sensor: Circuit Short To Battery Or Open Module senses a short to battery or an open for the humidity sensor.
HVAC B1A69:92 Humidity Sensor: Performance Or Incorrect Operation Module senses the wrong humidity sensor value.

Possible Sources

  • Wiring, terminals or connectors
  • In-vehicle temperature and humidity sensor
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
E1 CHECK THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Disconnect HVAC control module C228B .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-29   Ground
      C228B-27   Ground
      C228B-19   Ground
      C228B-9   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to E2

E2 CHECK THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-29   Ground
      C228B-27   Ground
      C228B-19   Ground
      C228B-9   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to E3
No REPAIR the circuit in question.

E3 CHECK THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR CIRCUITS FOR AN OPEN CIRCUIT
  • Disconnect In-vehicle temperature and humidity sensor C910 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-29   C910-1
      C228B-27   C910-2
      C228B-19   C910-4
      C228B-9   C910-6

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   C910-3
      C228A-2   C910-5

Are the resistances less than 3 ohms?
Yes INSTALL a new in-vehicle temperature and humidity sensor. Refer to the appropriate procedure in Group 412-00. TEST the system for normal operation. If the concern is still present, GO to E4
No REPAIR the circuit in question.

E4 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST F : B1B71:11, B1B71:15

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Evaporator Temperature Sensor, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1B71:11 Evaporator Temperature Sensor: Circuit Short To Ground Module senses lower than expected voltage on the sensor feedback circuit, indicating a short to ground.
HVAC B1B71:15 Evaporator Temperature Sensor: Circuit Short To Battery Or Open Module senses greater than expected voltage on the sensor feedback circuit, indicating a short to voltage or an open circuit or sensor.

Possible Sources

  • Wiring, terminals or connectors
  • Evaporator temperature sensor
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
F1 CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   Ground
      C228A-19   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to F2

F2 CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   Ground
      C228A-19   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to F3
No REPAIR the circuit in question.

F3 CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUITS FOR AN OPEN
  • Disconnect Evaporator temperature sensor C296 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   C296-1
      C228A-19   C296-2

Are the resistances less than 3 ohms?
Yes GO to F4
No REPAIR the circuit in question.

F4 CHECK THE EVAPORATOR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C296-1   C296-2

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new evaporator temperature sensor. REFER to the appropriate procedure in Group 412-00. TEST the system for normal operation. If the concern is still present, GO to F5
No REPAIR the circuits.

F5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST G : THE TEMPERATURE CONTROL IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY - DRIVER SIDE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Temperature Door Actuator - Driver Side. REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

During an actuator calibration cycle, the HVAC control module drives the temperature door until the door reaches both internal stops in the HVAC case. If the temperature blend door is temporarily obstructed or binding during a calibration cycle, the HVAC control module can interpret this as the actual end of travel for the door. When this condition occurs and the HVAC control module commands the actuator to its end of travel, the airflow may not be the expected temperature.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1081:07 Left Temperature Damper Motor: Mechanical Failures Module senses the temperature door actuator motor control is awake, no actuator drive, stall before achieving target position within 15 seconds.
HVAC B1081:11 Left Temperature Damper Motor: Circuit Short To Ground Module senses lower the expected voltage on the temperature door actuator motor circuit when voltage is applied to drive the motor, indicating a short to ground. The motor can move only in one direction.
HVAC B1081:12 Left Temperature Damper Motor: Circuit Short To Battery Module senses a short to voltage on the temperature door actuator circuits when motor movement is commanded.
HVAC B1081:13 Left Temperature Damper Motor: Circuit Open Module senses an open on the temperature door actuator circuits when motor movement is commanded.
HVAC B11E5:11 Left HVAC Damper Position Sensor: Circuit Short To Ground Module senses a short to ground on the temperature door actuator circuits when motor movement is commanded.
HVAC B11E5:15 Left HVAC Damper Position Sensor: Circuit Short To Battery Or Open Module senses a short to voltage or an open on the temperature door actuator circuits when motor movement is commanded.

Possible Sources

  • Wiring, terminals or connectors
  • Temperature blend door actuator
  • Temperature blend door is binding, stuck or slipping
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
G1 CHECK THE DRIVER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-9   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-10   Ground
      C228A-8   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to G2

G2 CHECK THE DRIVER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-9   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-10   Ground
      C228A-8   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to G3
No REPAIR the circuit.

G3 CHECK THE DRIVER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Driver side temperature door actuator C2091 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-9   C2091-1
      C228A-2   C2091-2
      C228A-3   C2091-3
      C228A-10   C2091-4
      C228A-8   C2091-6

Are the resistances less than 3 ohms?
Yes GO to G4
No REPAIR the circuit.

G4 CHECK THE DRIVER SIDE TEMPERATURE DOOR ACTUATOR POWER CIRCUIT FOR VOLTAGE
  • Connect HVAC control module C228A .
  • Ignition ON.
  • On the HVAC controls, select the FLOOR position, then set the temperature control to full warm and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2091-3   Ground

Is any voltage present?
Yes GO to G5
No GO to Pinpoint Test AB

G5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the driver side temperature door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new driver side temperature door actuator. Refer to the appropriate procedure in Group 412-00. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to G6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

G6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST H : THE TEMPERATURE CONTROL IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY - PASSENGER SIDE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Temperature Door Actuator - Passenger Side, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

During an actuator calibration cycle, the HVAC control module drives the temperature door until the door reaches both internal stops in the HVAC case. If the temperature door is temporarily obstructed or binding during a calibration cycle, the HVAC control module can interpret this as the actual end of travel for the door. When this condition occurs and the HVAC control module commands the actuator to its end of travel, the airflow may not be the expected temperature.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1082:07 Right Temperature Damper Motor: Mechanical Failures Module senses the temperature door actuator motor control is awake, no actuator drive, stall before achieving target position within 15 seconds.
HVAC B1082:11 Right Temperature Damper Motor: Circuit Short To Ground Module senses lower the expected voltage on the temperature door actuator motor circuit when voltage is applied to drive the motor, indicating a short to ground. The motor can move only in one direction.
HVAC B1082:12 Right Temperature Damper Motor: Circuit Short To Battery Module senses a short to voltage on the temperature door actuator circuits when motor movement is commanded.
HVAC B1082:13 Right Temperature Damper Motor: Circuit Open Module senses an open on the temperature door actuator circuits when motor movement is commanded.
HVAC B11E6:11 Right HVAC Damper Position Sensor: Circuit Short To Ground Module senses a short to ground on the temperature door actuator circuits when motor movement is commanded.
HVAC B11E6:15 Right HVAC Damper Position Sensor: Circuit Short To Battery Or Open Module senses a short to voltage or an open on the temperature door actuator circuits when motor movement is commanded.

Possible Sources

  • Wiring, terminals or connectors
  • Temperature door actuator
  • Temperature door is binding or stuck
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
H1 CHECK THE PASSENGER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Disconnect HVAC control module C228B .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-14   Ground
      C228B-18   Ground
      C228B-13   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   Ground
      C228A-3   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to H2

H2 CHECK THE PASSENGER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-14   Ground
      C228B-18   Ground
      C228B-13   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   Ground
      C228A-3   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to H3
No REPAIR the circuit.

H3 CHECK THE PASSENGER SIDE TEMPERATURE DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Passenger side temperature door actuator C2092 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-14   C2092-1
      C228B-18   C2092-4
      C228B-13   C2092-6

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-2   C2092-2
      C228A-3   C2092-3

Are the resistances less than 3 ohms?
Yes GO to H4
No REPAIR the circuit.

H4 CHECK THE PASSENGER SIDE TEMPERATURE DOOR ACTUATOR POWER CIRCUIT FOR VOLTAGE
  • Connect HVAC control module C228A .
  • Ignition ON.
  • On the HVAC controls, select the FLOOR position, then set the temperature control to full warm and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2092-3   Ground

Is any voltage present?
Yes GO to H5
No GO to Pinpoint Test AB

H5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the temperature door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new passenger side temperature door actuator. Refer to the appropriate procedure in Group 412-00. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to H6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

H6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST I : UNABLE TO DUPLICATE THE CUSTOMER CONCERN AND NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT

Normal Operation and Fault Conditions

The purpose of this pinpoint test is to test the functions of the HVAC system and identify the correct HVAC symptom pinpoint test.

Possible Sources

  • HVAC system or related components
NOTE: Before carrying out the following test, diagnose all Heating, Ventilation and Air Conditioning (A/C) control module and Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs).
I1 CHECK THE BLOWER MOTOR OPERATION
  • Ignition ON.
  • On the HVAC controls, select PANEL mode.
  • Observe blower motor operation and select each blower motor speed.

Does the blower motor operate in all ranges?
Yes GO to I2
No If the front blower motor does not operate in any setting, GO to Pinpoint Test O
If the rear blower motor does not operate in any setting, GO to Pinpoint Test AC
If the front blower motor does not correctly change speeds or turn off when the system is turned off, GO to Pinpoint Test P
If the rear blower motor does not correctly change speeds or turn off when the system is turned off, GO to Pinpoint Test AD

I2 CHECK AIRFLOW OPERATION
  • Select the highest blower motor setting.
  • While observing the airflow, select each of the airflow positions (PANEL, PANEL-FLOOR, FLOOR, FLOOR-DEFROST, DEFROST).

Is the airflow directed to the correct outlets?
Yes GO to I3
No If the front airflow is incorrect, GO to Pinpoint Test K
If the rear airflow is incorrect, GO to Pinpoint Test AE

I3 VERIFY TEMPERATURE CONTROL OPERATION
  • Start the vehicle and allow it to reach normal operating temperature.
  • With the A/C off, select PANEL mode.
  • Change the driver and passenger temperature settings from the coldest to the warmest and back to the coldest.

Does the temperature change between very warm to cool?
Yes GO to I4
No If the temperature does not get very warm, GO to Pinpoint Test L
If the driver side temperature does not change at all, GO to Pinpoint Test G
If the passenger side temperature does not change at all, GO to Pinpoint Test H
If the rear temperature does not change at all, GO to Pinpoint Test AF

I4 VERIFY THE A/C (AIR CONDITIONING) CLUTCH DOES NOT ENGAGE WITH THE A/C (AIR CONDITIONING) OFF
  • With the engine running and the A/C off, select PANEL mode.
  • Select the coldest temperature setting.

Is the outlet temperature close to ambient temperature?
Yes GO to I5
No If the driver side temperature is warmer than ambient temperature, GO to Pinpoint Test G
If the passenger side temperature is warmer than ambient temperature, GO to Pinpoint Test H
If the outlet temperature is significantly colder than ambient temperature, GO to Pinpoint Test N

I5 VERIFY A/C (AIR CONDITIONING) CLUTCH ENGAGEMENT IN THE A/C (AIR CONDITIONING) MODE
  • Make sure the ambient air temperature is above approximately 1°C (33.8°F).
  • On the HVAC controls, select PANEL mode, then press the A/C button (indicator on).

Does the A/C clutch engage when the panel mode is selected and the A/C button (indicator on) is pressed?
Yes GO to I6
No GO to Pinpoint Test M

I6 CHECK THE RECIRCULATED AIR OPERATION
  • With the engine running, press the RECIRC button (indicator off).
  • On the HVAC controls, select PANEL mode, then select the highest blower motor setting.
  • Observe airflow noise.
  • On the HVAC controls, press the RECIRC button (indicator on).

Does the airflow noise increase when the RECIRC mode is selected (indicator on)?
Yes GO to I7
No GO to Pinpoint Test J

I7 CHECK THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR FAN OPERATION
  • Make sure the ambient air temperature is above approximately 1°C (33.8°F).
  • On the HVAC controls, select PANEL mode, then press the A/C button (indicator ON).
  • Place a piece of tissue within 25 mm (1 in) of the in-vehicle temperature and humidity sensor opening.

Is the tissue drawn to the sensor opening?
Yes The system is operating normally.
No DIAGNOSE the in-vehicle temperature and humidity fan operation, GO to Pinpoint Test E

PINPOINT TEST J : THE AIR INLET DOOR IS INOPERATIVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Door Actuator – Air Inlet Door, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

During an actuator calibration cycle, the HVAC control module drives the air inlet mode door until the door reaches both internal stops in the HVAC case. If the air inlet mode door is temporarily obstructed or binding during a calibration cycle, the HVAC control module may interpret this as the actual end of travel for the door. When this condition occurs and the HVAC control module commands the actuator to its end of travel, the air intake may not be from the expected source.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1083:07 Recirculation Damper Motor: Mechanical Failures Module senses the air inlet door actuator motor control is awake, no actuator drive, stall before achieving target position within 15 seconds.
HVAC B1083:11 Recirculation Damper Motor: Circuit Short To Ground Module senses a short to ground on air inlet door actuator circuits when motor movement is commanded.
HVAC B1083:12 Recirculation Damper Motor: Circuit Short To Battery Module senses a short to voltage on air inlet door actuator circuits when motor movement is commanded.
HVAC B1083:13 Recirculation Damper Motor: Circuit Open Module senses an open on air inlet door actuator circuits when motor movement is commanded.
HVAC B11F0:11 Air Intake Damper Position Sensor: Circuit Short To Ground Module senses a short to ground on air inlet door actuator circuits when motor movement is commanded.
HVAC B11F0:15 Air Intake Damper Position Sensor: Circuit Short To Battery Or Open Module senses a short to voltage or an open on air inlet door actuator circuits when motor movement is commanded.

Possible Sources

  • Wiring, terminals or connectors
  • Actuator door binding, stuck or slipping
  • Air inlet mode door actuator
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
J1 CHECK THE AIR INLET MODE DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-24   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-16   Ground
      C228A-25   Ground

Is any voltage present?
Yes REPAIR the affected circuit.
No GO to J2

J2 CHECK THE AIR INLET MODE DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-24   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-16   Ground
      C228A-25   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to J3
No REPAIR the affected circuit.

J3 CHECK THE AIR INLET MODE DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Air inlet mode door actuator C289 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-24   C289-1
      C228A-2   C289-2
      C228A-3   C289-3
      C228A-16   C289-4
      C228A-25   C289-6

Are the resistances less than 3 ohms?
Yes GO to J4
No REPAIR the circuit.

J4 CHECK THE AIR INLET DOOR ACTUATOR POWER CIRCUIT FOR VOLTAGE
  • Connect HVAC control module C228A .
  • Ignition ON.
  • On the HVAC controls, select the FLOOR position, then set the temperature control to full warm and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C289-3   Ground

Is any voltage present?
Yes GO to J5
No GO to Pinpoint Test AB

J5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the air inlet door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new air inlet door actuator. Refer to the appropriate procedure in Group 412-00. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to J6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

J6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST K : INCORRECT OR ERRATIC DIRECTION OF AIRFLOW FROM OUTLETS ON FRONT SYSTEM

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Air Handling, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

During an actuator calibration cycle, the HVAC control module drives the defrost vent door and the footwell vent/register door until the doors reach both internal stops in the HVAC case. If the defrost vent door or the footwell vent/register door is temporarily obstructed or binding during a calibration cycle, the HVAC control module may interpret this as the actual end of travel for the door. When this condition occurs and the HVAC control module commands the actuator to its end of travel, the airflow may not be from the expected outlets.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1086:07 Air Distribution Damper Motor: Mechanical Failures Module senses the air distribution door actuator motor control is awake, no actuator drive, stall before achieving target position within 15 seconds.
HVAC B1086:11 Air Distribution Damper Motor: Circuit Short To Ground Module senses a short to ground on air distribution door actuator circuits when motor movement is commanded.
HVAC B1086:12 Air Distribution Damper Motor: Circuit Short To Battery Module senses a short to voltage on air distribution door actuator circuits when motor movement is commanded.
HVAC B1086:13 Air Distribution Damper Motor: Circuit Open Module senses an open on air distribution door actuator circuits when motor movement is commanded.
HVAC B11E7:11 Air Distribution Damper Position Sensor: Circuit Short To Ground Module senses a short to ground on air distribution door actuator circuits when motor movement is commanded.
HVAC B11E7:15 Air Distribution Damper Position Sensor: Circuit Short To Battery Or Open Module senses a short to voltage or an open on air distribution door actuator circuits when motor movement is commanded.

Possible Sources

  • Wiring, terminals or connectors
  • Actuator doors binding, stuck or slipping
  • Air distribution door actuator
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
K1 CHECK THE AIR DISTRIBUTION DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-20   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-22   Ground
      C228A-21   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to K2

K2 CHECK THE AIR DISTRIBUTION DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-20   Ground
      C228A-2   Ground
      C228A-3   Ground
      C228A-22   Ground
      C228A-21   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to K3
No REPAIR the circuit in question.

K3 CHECK THE AIR DISTRIBUTION DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Air distribution door actuator C236 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-20   C236-1
      C228A-2   C236-2
      C228A-3   C236-3
      C228A-22   C236-4
      C228A-21   C236-6

Are the resistances less than 3 ohms?
Yes GO to K4
No REPAIR the circuit in question.

K4 CHECK THE AIR DISTRIBUTION DOOR ACTUATOR POWER CIRCUIT FOR VOLTAGE
  • Connect HVAC control module C228A-- .
  • Ignition ON.
  • On the HVAC controls, select the FLOOR position, then set the temperature control to full warm and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C236-3   Ground

Is any voltage present?
Yes GO to K5
No GO to Pinpoint Test AB

K5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the air distribution door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new air distribution door actuator. Refer to the appropriate procedure in Group 412-00. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to K6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

K6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST L : INSUFFICIENT, ERRATIC OR NO HEAT

Normal Operation and Fault Conditions

When the engine is at operating temperature hot coolant flows from the engine through the heater core and back to the engine. Correct coolant temperatures are critical for good heater performance.

Possible Sources

  • Low engine coolant level
  • Plugged or partially plugged heater core
  • Temperature door binding or stuck
  • Temperature door actuator

Visual Inspection and Pre-checks

  • Inspect for low engine coolant level.
L1 CHECK FOR CORRECT ENGINE COOLANT LEVEL
  • Ignition OFF.
  • Check the engine coolant level.

Is the engine coolant at the correct level (hot or cold) as indicated on the engine coolant recovery reservoir?
Yes GO to L3
No GO to L2

L2 CHECK THE ENGINE COOLING SYSTEM FOR LEAKS
  • Pressure test the cooling system for leaks. Refer to the appropriate section in Group 303 for the procedure.

Does the cooling system leak?
Yes REPAIR the coolant leak.
No FILL and BLEED the cooling system. Refer to the appropriate section in Group 303 for the procedure.
After filling and bleeding the cooling system, GO to L3

L3 CHECK FOR COOLANT FLOW TO THE HEATER CORE
  • Run the engine until it reaches normal operating temperature.
  • On the HVAC controls, select the FLOOR position, then set the temperature control to full warm and the blower to the lowest setting.
  • Using a suitable temperature measuring device, check the temperature of the heater core inlet hose.

Is the heater core inlet hose temperature above 65.5°C (150°F)?
Yes GO to L4
No If equipped with a cabin heater coolant pump, DIAGNOSE for the cabin coolant pump causing a possible restriction of flow to the heater core. GO to Pinpoint Test D
If not equipped with a cabin heater coolant pump, DIAGNOSE the engine does not reach operating temperature. Refer to the appropriate section in Group 303 for the procedure.

L4 CHECK FOR A PLUGGED OR RESTRICTED HEATER CORE
  • Using a suitable temperature measuring device, measure the temperature of the heater core outlet hose.

Is the heater core outlet hose temperature similar to the inlet hose temperature, within approximately 6-17°C (10-30°F)?
Yes DIAGNOSE an inoperative front temperature door actuator, GO to Pinpoint Test G or GO to Pinpoint Test H
DIAGNOSE an inoperative rear temperature door actuator, GO to Pinpoint Test AF
No INSTALL a new heater core. REFER to the appropriate procedure in Group 412-00, or REFER to the appropriate procedure in Group 412-02.

PINPOINT TEST M : THE A/C (AIR CONDITIONING) IS INOPERATIVE - NON HEV (HYBRID ELECTRIC VEHICLE)

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

A/C Request, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

Possible Sources

  • Wiring, terminals or connectors
  • A/C system discharged or low refrigerant charge
  • Network concerns
  • A/C pressure transducer
  • Evaporator temperature sensor
  • Engine temperature sensors
  • A/C compressor clutch air gap
  • A/C compressor clutch field coil
  • A/C clutch relay (non-serviceable, part of the BCMC)
  • HVAC control module

Visual Inspection and Pre-checks

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Some Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs) may inhibit Air Conditioning (A/C) operation. If any Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs) are retrieved, diagnose those first. Refer to the Diagnostic Trouble Code (DTC) Chart.
M1 CHECK THE A/C (AIR CONDITIONING) SYSTEM PRESSURE

NOTE: Static refrigerant pressure, under perfect conditions, should approximately reflect ambient air temperature. Do not rely upon the static refrigerant pressure alone to determine if the system is properly charged. Refer to the current Ford Web Based Technical Training courses for basic HVAC system refrigerant operation.

  • Ignition OFF.
  • Connect the manifold gauge set.
  • Check for minimum A/C system pressure.

Is the A/C system pressure above 290 kPa (42 psi)?
Yes GO to M2
No CHECK the A/C system for leaks. REFER to the appropriate general procedures in Group 412-00.
After leak is repaired, RECHARGE the A/C system. REFER to the appropriate general procedure in Group 412-00.

M2 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the network test.

Do the HVAC control module and the PCM pass the network test?
Yes GO to M3
No DIAGNOSE the HVAC control module or PCM does not communicate with the diagnostic scan tool.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

M3 COMPARE THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) PRESSURE SENSOR PID (PARAMETER IDENTIFICATION) WITH THE MANIFOLD GAUGE VALUE

NOTE: The following pinpoint test step is tested in ambient temperature of approximately 21.1°C (70°F). As ambient temperatures near 38°C (100.4°F), the pressure value difference increases above ± 15 psi (103 kPa) range.

  • Access the  PCM  and monitor the  ACP_PRESS (kPa)  PID


Are the pressure values of the manifold gauge set and the PID, dependent upon ambient temperatures, within ± 103 kPa (15 psi)?
Yes GO to M4
No DIAGNOSE the A/C pressure transducer. GO to Pinpoint Test A

M4 COMPARE THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE EVAPORATOR TEMPERATURE PID (PARAMETER IDENTIFICATION) TO THE PCM (POWERTRAIN CONTROL MODULE) AMBIENT AIR TEMPERATURE PID (PARAMETER IDENTIFICATION)
  • Ignition OFF.
  • Allow the vehicle exterior and interior to stabilize to ambient temperature. This can take a soak period of at least 6 hours.
  • Ignition ON.
  • Access the  PCM  and monitor the  AAT (Deg C)  PID

  • Access the  HVAC  and monitor the  EVAP_TEMP (Deg C)  PID


Are the temperature values similar [typically within 18ºC (32.4ºF)]?
Yes GO to M5
No DIAGNOSE the evaporator temperature sensor. GO to Pinpoint Test F

M5 COMPARE THE PCM (POWERTRAIN CONTROL MODULE) INTAKE AIR TEMPERATURE PID (PARAMETER IDENTIFICATION) AND THE OTHER TEMPERATURE SENSOR READINGS TO THE PCM (POWERTRAIN CONTROL MODULE) AMBIENT AIR TEMPERATURE PID (PARAMETER IDENTIFICATION)

NOTE: Compare multiple engine sensor readings to the ambient temperature to determine sensors are reading correctly. A faulty sensor can cause the Powertrain Control Module (PCM) to disable the Air Conditioning (A/C) compressor with or without a Diagnostic Trouble Code (DTC).

  • Monitor the temperature Parameter Identifications (PIDs) (as applicable):
    • Access the  PCM  and monitor the  AAT (Deg C)  PID

    • Access the  PCM  and monitor the  CAC_T (Deg C)  PID

    • Access the  PCM  and monitor the  CHT (Deg C)  PID

    • Access the  PCM  and monitor the  ECT (Deg C)  PID

    • Access the  PCM  and monitor the  IAT (Deg C)  PID

    • Access the  PCM  and monitor the  IAT2 (Deg C)  PID


Are the temperature values similar [typically within 18ºC (32.4ºF)]?
Yes GO to M6
No DIAGNOSE the suspect temperature sensor. REFER to Section 413-01 for Ambient Air Temperature (AAT) sensor or Outside Air Temperature Display concerns. For all other temperature sensor concerns, REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

M6 RESET THE AMBIENT AIR TEMPERATURE (AAT) SENSOR
  • On the HVAC controls, press the A/C (air conditioning) and Recirc buttons simultaneously for 5 seconds, then release both. Within 2 seconds press A/C button again.
  • Start the engine.
  • On the HVAC controls, set the temperature to full cold, select PANEL and select the A/C button (indicator on).

Does the A/C compressor turn on?
Yes TEST the A/C system for normal operation. REFER to the appropriate Refrigerant System Tests general procedure in Group 412-00.
No GO to M7

M7 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE A/C (AIR CONDITIONING) SWITCH PID (PARAMETER IDENTIFICATION) WITH THE A/C (AIR CONDITIONING) ON
  • Access the  HVAC  and monitor the  CC_SW_AC  PID

    .
  • On the HVAC controls, select PANEL and then press the A/C button (indicator ON).

Does the PID display ON or Yes when the button is pressed?
Yes GO to M8
No GO to M15

M8 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL PID (PARAMETER IDENTIFICATION) WITH THE A/C (AIR CONDITIONING) ON
  • Access the  PCM  and monitor the  AC_REQ  PID

  • On the HVAC controls, select PANEL and then press the A/C button (indicator ON).

Does the PID display ON or Yes when the button is pressed?
Yes GO to M9
No GO to M15

M9 COMMAND THE A/C (AIR CONDITIONING) COMPRESSOR ON
  • Access the  PCM  and control the  ACC_CMD  PID


Does the A/C compressor turn on?
Yes TURN OFF the active command PID. GO to M16
No TURN OFF the active command PID. GO to M10

M10 CHECK THE A/C (AIR CONDITIONING) CLUTCH RELAY COIL CONTROL CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3L), C1551B (3.0L) or C175B (3.3L).
  • Disconnect BCMC C1035B .
  • For vehicles equipped with a 2.3L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C1381B-62
  • For vehicles equipped with a 3.0L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C1551B-19
  • For vehicles equipped with a 3.3L engine, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-19   C175B-19

Is the resistance less than 3 ohms?
Yes GO to M11
No REPAIR the circuit.

M11 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR CLUTCH FIELD COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect A/C clutch field coil C100 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035B-41   C100-1

Is the resistance less than 3 ohms?
Yes GO to M12
No REPAIR the circuit.

M12 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR CLUTCH FIELD COIL GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C100-2   Ground

Is the resistance less than 3 ohms?
Yes GO to M13
No REPAIR the circuit.

M13 CHECK FOR VOLTAGE TO THE A/C (AIR CONDITIONING) COMPRESSOR CLUTCH FIELD COIL
  • Connect PCM C1551B .
  • Connect BJB C1035A .
  • Connect BJB C1035B .
  • Ignition ON.
  • Access the  PCM  and control the  ACC_CMD  PID

  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C100-1   Ground

Is the voltage greater than 11 volts?
Yes TURN OFF the active command PID. GO to M14
No TURN OFF the active command PID. INSTALL a new BCMC [Also known as BJB].
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).

M14 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR CLUTCH AIR GAP
  • Measure the A/C compressor clutch air gap at 3 equally spaced locations between the clutch hub and the A/C compressor clutch pulley. REFER to the appropriate General Procedure in Group 412-00.

Is the A/C compressor clutch air gap greater than 0.6 mm (0.0236 in)?
Yes ADJUST the A/C compressor clutch air gap. REFER to the appropriate General Procedure in Group 412-00.
No INSTALL a new A/C compressor clutch and field coil. REFER to the appropriate General Procedure in Group 412-00.

M15 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

M16 CHECK FOR AN INPUT DISABLING THE A/C (AIR CONDITIONING) CLUTCH RELAY

NOTE: The Powertrain Control Module (PCM) strategy may disable the Air Conditioning (A/C) compressor operation. If the A/C compressor clutch can be commanded on using a diagnostic scan tool Powertrain Control Module (PCM) Parameter Identifications (PIDs) Active Commands, Powertrain Control Module (PCM) replacement will not resolve the condition.

  • Diagnose the PCM not energizing the A/C clutch relay using the suggestions in the table below.
    A/C Clutch Engagement is inhibited because strategy has not yet detected hardware that indicates vehicle is equipped with A/C
    A/C Clutch Engagement is inhibited because the strategy is operating in Ignition System Failure Mode
    A/C Clutch Engagement is inhibited because the (ECU) received a Request to Command the A/C Off
    A/C Clutch Engagement is inhibited because the engine has not yet reached a stable running mode after starting
    A/C Clutch Engagement is inhibited because the A/C Discharge (Head) Pressure is Too High
    A/C Clutch Engagement is inhibited because the Engine Coolant Temperature is Too High
    A/C Clutch Engagement is inhibited to Prevent Frost and Ice Build Up on the Evaporator
    A/C Clutch Engagement is inhibited to Prevent an Engine Stall during a Low Engine Speed condition
    A/C Clutch Engagement is inhibited to Protect the Compressor from a Compressor Over-speed condition
    A/C Clutch Engagement is inhibited to temporarily make more power available when Accelerator Pedal is Fully Depressed
    A/C Clutch Engagement is inhibited because Low A/C Refrigerant Charge has been detected
    A/C Clutch Engagement is inhibited to Protect the Compressor from Operating at Too Low of an Ambient Temperature
    A/C Clutch Engagement is inhibited due to Missing Climate Control Message
    A/C Clutch Engagement is inhibited because the strategy is operating in Failsafe Cooling Mode
    A/C Clutch Engagement is inhibited to Protect the Clutch from Damage because the Compressor Load and Speed are Too High
    A/C Clutch Engagement is inhibited by the off portion of the A/C Cycling Strategy invoked to manage High Engine Temperature
    A/C Clutch Engagement is inhibited due to Low Battery State of Charge
    A/C Clutch Engagement is inhibited to Protect the Variable Displacement Compressor from Operating at Too Low of a Temperature
    A/C Clutch Engagement is inhibited to improve Brake Booster Vacuum
    A/C Clutch Engagement is inhibited because Evaporator Temperature is sufficiently low and compressor was at minimum displacement
    A/C Clutch Engagement is inhibited (Disabled) because the Evaporator Temperature is sufficiently below the target temperature
    A/C Clutch Engagement is inhibited to satisfy A/C Clutch minimum off time
    A/C Clutch Engagement is inhibited Due to Request from Torque Control Strategy (to Temporarily Make More Power Available)
    A/C Clutch Engagement is inhibited to Prevent Engine Stalling
    A/C Clutch Engagement is inhibited Due to Request to Disable A/C from Stop-Start Strategy
    A/C Clutch Engagement is inhibited (Delayed) to make Power Available for Power Steering
    A/C Clutch Engagement Is Inhibited Due To State Of Auxiliary A/C Disable (Typically A Pressure Or Temperature) Switch 1 input
    A/C Clutch Engagement is inhibited due to state of auxiliary A/C Disable (Typically a Pressure or Temperature) Switch 2 input

Are any of the conditions described above not within normal parameters?
Yes DIAGNOSE the condition found to be disabling the A/C clutch relay. REFER to the appropriate Workshop Manual (WSM) section or the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No The A/C compressor clutch can be commanded on using the diagnostic scan tool PCM active command PID. The A/C inoperative concern may be caused by an intermittent condition due to a component or module connection, wiring or pin issue. ADDRESS the root cause of any connector or pin issues. CHECK the vehicle service history for recent service actions that have replaced modules. This condition may be due to incomplete or incorrect PMI procedures.

PINPOINT TEST N : THE A/C (AIR CONDITIONING) IS ALWAYS ON — A/C (AIR CONDITIONING) MODE ALWAYS COMMANDED ON - NON HEV (HYBRID ELECTRIC VEHICLE)

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

A/C Request, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P1464:00 A/C Demand Out Of Self Test Range: No Sub Type Information PCM senses an A/C request during a self-test.

Possible Sources

  • Wiring, terminals or connectors
  • A/C pressure transducer
  • Evaporator temperature sensor
  • HVAC control module
  • PCM

Visual Inspection and Pre-checks

  • Inspect for loose or corroded PCM or HVAC control module connections.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
N1 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Make sure the HVAC control module is powered off.
  • Using a diagnostic scan tool, clear the PCM Diagnostic Trouble Codes (DTCs).
  • Using a diagnostic scan tool, carry out the PCM self-test.

Does DTC P1464 return?
Yes GO to N2
No IGNORE the DTC and CONTINUE diagnosing other Diagnostic Trouble Codes (DTCs) or symptoms. GO to the DTC Chart or Symptom Chart – Climate Control in this section.

N2 CHECK THE A/C (AIR CONDITIONING) COMPRESSOR CLUTCH FIELD COIL VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect A/C compressor clutch field coil C100 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C100-1   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to N3

N3 COMPARE THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE EVAPORATOR TEMPERATURE PID (PARAMETER IDENTIFICATION) TO THE PCM (POWERTRAIN CONTROL MODULE) AMBIENT AIR TEMPERATURE PID (PARAMETER IDENTIFICATION)
  • Ignition OFF.
  • Allow the vehicle exterior and interior to stabilize to ambient temperature. This can take a soak period of at least 6 hours.
  • Ignition ON.
  • Access the  PCM  and monitor the  AAT (Deg C)  PID

  • Access the  HVAC  and monitor the  EVAP_TEMP (Deg C)  PID


Are the temperature values similar [typically within 18ºC (32.4ºF)]?
Yes GO to N4
No DIAGNOSE the evaporator temperature sensor. GO to Pinpoint Test F

N4 COMPARE THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) PRESSURE SENSOR PID (PARAMETER IDENTIFICATION) WITH THE MANIFOLD GAUGE VALUE

NOTE: The following pinpoint test step is tested in ambient temperature of approximately 21.1°C (70°F). As ambient temperatures near 38°C (100.4°F), the pressure value difference increases above ± 15 psi (103 kPa) range.

  • Access the  PCM  and monitor the  ACP_PRESS (kPa)  PID


Are the pressure values of the manifold gauge set and the PID, dependent upon ambient temperatures, within ± 103 kPa (15 psi)?
Yes GO to N5
No DIAGNOSE the A/C pressure transducer. GO to Pinpoint Test A

N5 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE A/C (AIR CONDITIONING) SWITCH STATUS PID (PARAMETER IDENTIFICATION) WITH THE A/C (AIR CONDITIONING) OFF
  • Access the  HVAC  and monitor the  CC_SW_AC  PID

  • Using the HVAC controls, select PANEL then press and release the A/C button (indicator off).

Does the PID display On when the A/C button is pressed and Off when released?
Yes GO to N6
No GO to N8

N6 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL PID (PARAMETER IDENTIFICATION) WITH THE A/C (AIR CONDITIONING) OFF
  • Access the  PCM  and monitor the  AC_REQ  PID

  • On the HVAC controls, deactivate the A/C button.

Does the PID display OFF?
Yes GO to N8
No GO to N7

N7 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL PID (PARAMETER IDENTIFICATION) WITH THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE DISCONNECTED
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Access the  PCM  and monitor the  AC_REQ  PID


Does the PID display OFF?
Yes GO to N8
No GO to N9

N8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

N9 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST O : THE FRONT BLOWER MOTOR IS INOPERATIVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Air Handling, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10AF:11 Blower Fan Relay: Circuit Short To Ground Module senses low voltage on the relay coil voltage circuit when the module is energizing the circuit. Blower relay is permanently inactive.
HVAC B10AF:13 Blower Fan Relay: Circuit Open Module senses no change in voltage on the blower relay coil voltage circuit when the module is energizing the circuit. The blower motor relay is inactive when circuit is open.
HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery Or Open Module senses greater than expected voltage on the blower relay coil voltage circuit, indicating an open circuit or a short to voltage. The blower motor relay is inactive when circuit is open; the blower motor relay is on all the time when shorted to battery.
HVAC B10B9:12 Blower Control: Circuit Short To Battery Module senses high voltage on the blower motor control PWM circuit, indicating a short directly to voltage. The blower motor is inoperative.
HVAC B10B9:14 Blower Control: Circuit Short To Ground Or Open Module senses no voltage on the blower motor control PWM circuit, indicating a short directly to ground or an open circuit. The blower motor runs at full speed if the circuit is shorted to ground. The blower motor is inoperative if the circuit is open.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • Blower motor relay (non-serviceable, part of the BCMC)
  • Blower motor control module
  • HVAC control module

Visual Inspection and Pre-checks

  • Make sure BJB fuse 13 (40A) is OK.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
O1 CHECK THE BLOWER MOTOR RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect BCMC C1035A .
  • Disconnect HVAC control module C228A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-11   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to O2
No REPAIR the circuit.

O2 CHECK THE BLOWER MOTOR RELAY COIL CONTROL CIRCUIT FOR AN OPEN

NOTE: Some vehicles may be equipped with a diode in the blower motor relay coil ground circuit. Make sure the multimeter leads are correctly attached during testing or a false reading will occur causing misdiagnosis of the circuit. For additional information, refer to the Wiring Diagrams manual.

  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-11   C1035A-25

Is the resistance less than 3 ohms?
Yes GO to O3
No REPAIR the circuit.

O3 CHECK THE BLOWER MOTOR CONTROL MODULE VOLTAGE CIRCUIT FOR AN OPEN
  • Disconnect Blower motor control module C297 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1035A-2   C297-1

Is the resistance less than 3 ohms?
Yes GO to O4
No REPAIR the circuit.

O4 CHECK FOR VOLTAGE TO THE BLOWER MOTOR CONTROL MODULE
  • Connect BCMC C1035A .
  • Connect HVAC control module C228A .
  • Ignition ON.
  • Select PANEL on the HVAC controls.
  • Select the highest blower motor setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-1   Ground

Is the voltage greater than 11 volts?
Yes GO to O5
No VERIFY BCMC fuse 13 (40A) is OK.
If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
If OK, INSTALL a new BCMC. REFER to the appropriate procedure in Group 419-10.

O5 CHECK THE BLOWER MOTOR CONTROL MODULE GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-6   Ground

Is the resistance less than 3 ohms?
Yes GO to O6
No REPAIR the circuit.

O6 CHECK THE BLOWER MOTOR CONTROL MODULE PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to O7

O7 CHECK THE BLOWER MOTOR CONTROL MODULE PWM (PULSE WIDTH MODULATION) CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-2   C228A-23

Is the resistance less than 3 ohms?
Yes GO to O8
No REPAIR the circuit.

O8 CHECK FOR CORRECT BLOWER MOTOR CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the blower motor speed control connector.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the blower motor speed control connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new blower motor control module. Refer to the appropriate procedure in Group 412-00. TEST the system for normal operation. If the concern is still present, GO to O9
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

O9 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST P : THE FRONT BLOWER MOTOR DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Air Handling. REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10AF:12 Blower Fan Relay: Circuit Short To Battery Module senses high voltage on the relay coil voltage circuit when the module is energizing the circuit. Blower relay is permanently active.
HVAC B10AF:15 Blower Fan Relay: Circuit Short To Battery Or Open Module senses greater than expected voltage on the blower relay coil voltage circuit, indicating an open circuit or a short to voltage. The blower motor relay is inactive when circuit is open; the blower motor relay is on all the time when shorted to battery.
HVAC B10B9:14 Blower Control: Circuit Short To Ground Or Open Module senses no voltage on the blower motor control PWM circuit, indicating a short directly to ground or an open circuit. The blower motor runs at full speed if the circuit is shorted to ground. The blower motor is inoperative if the circuit is open

Possible Sources

  • Wiring, terminals or connectors
  • Blower motor control module
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
P1 VERIFY THE BLOWER MOTOR OPERATION
  • Ignition ON.
  • Select PANEL on the HVAC controls. Adjust the blower motor setting to the minimum and maximum settings.

Does the blower motor operate at any setting?
Yes GO to P2
No GO to Pinpoint Test O

P2 CHECK THE BLOWER MOTOR CONTROL MODULE PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect Blower motor speed control C297 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to P3
No REPAIR the circuit.

P3 CHECK THE BLOWER MOTOR RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-11   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to P4

P4 CHECK THE BLOWER MOTOR CONTROL MODULE VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE
  • Disconnect BCMC fuse 13 (40A).
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C297-1   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to P5

P5 CHECK FOR CORRECT BLOWER MOTOR CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the blower motor speed control connector.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the blower motor speed control connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new blower motor control module. Refer to the appropriate procedure in Group 412-00. TEST the system for normal operation. If the concern is still present, GO to P6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

P6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST Q : U0140:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The ACCM, HVAC control module and the RHVAC control module communicate with the BCM over the CAN. If messages are missing or not received from the BCM, the climate control system may not operate not operate correctly.

Inspect for loose or corroded BCM and HVAC control module connections.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets in continuous memory when the ACCM detects network messages are missing from the BCM for more than 5 seconds.
HVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets in continuous memory when the HVAC control module detects network messages are missing from the BCM for more than 5 seconds.
RHVAC U0140:00 Lost Communication With Body Control Module: No Sub Type Information Sets in continuous memory when the RHVAC control module detects network messages are missing from the BCM for more than 5 seconds.

Possible Sources

  • Network communication concern
  • Wiring, terminals or connectors
  • Over or undervoltage concerns
  • ACCM
  • HVAC control module
  • RHVAC control module
  • BCM
Q1 VERIFY THE CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to Q2
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

Q2 CHECK THE NETWORK COMMUNICATION
  • Using a diagnostic scan tool, carry out the network test.

Does the BCM pass the network test?
Yes GO to Q3
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

Q3 CHECK FOR NON-NETWORK DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the self-test for the module in question (ACCM, HVAC control module, RHVAC control module) setting the DTC.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs) first. REFER to the appropriate DTC Chart in this section.
No GO to Q4

Q4 CHECK FOR NON-NETWORK BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the BCM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to Q5

Q5 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0140:00
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question (ACCM, HVAC control module, RHVAC control module) setting the DTC.
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the module in question (ACCM, HVAC control module, RHVAC control module) setting the DTC.

Is DTC U0140:00 still present?
Yes GO to Q6
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

Q6 CHECK FOR OTHER CAUSES OF NETWORK COMMUNICATION CONCERN

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Check the vehicle service history for recent service actions related to the BCM and the module in question ( ACCM, HVAC control module, RHVAC control module) setting the DTC. If recent service history is found:
    • verify correct replacement module was installed
      • vehicle parts build list may be used to verify correct part fitment
    • verify the configuration of replacement module was correct
      • re-configure module using as-built data if prior configuration is suspect
    • verify the module was not obtained from a like vehicle and installed into vehicle with concern
      • return the swapped module to source vehicle and obtain new replacement module
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to Q7
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

Q7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all BCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. REFER to the appropriate procedure in Group 419-10.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST R : U0151:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Control Logic, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets in the HVAC control module if data messages received from the RCM are missing.

Possible Sources

  • Vehicle communication bus
  • RCM
  • HVAC control module
R1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to R2
No CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

R2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Does the RCM pass the network test?
Yes GO to R3
No DIAGNOSE the RCM does not communicate with the diagnostic scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

R3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, carry out the RCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
No GO to R4

R4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For U3003:16 GO to Pinpoint Test AM
For U3003:17 GO to Pinpoint Test AN
No GO to R5

R5 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U0151:00 still present?
Yes GO to R6
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

R6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0151:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, retrieve all continuous memory Diagnostic Trouble Codes (DTCs).

Is DTC U0151:00 set in other modules on the network?
Yes GO to R7
No GO to R8

R7 CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RCM electrical connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect RCM electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RCM.
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

R8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST S : U0155:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the IPC sends messages to the HVAC control module over the MS-CAN. If the HVAC control module does not receive these messages within the specified time frame, the module sets a DTC. This can be due to an IPC failure, a circuit failure on the MS-CAN or an excessive load on the network. For information on the messages sent to the HVAC control module by the IPC, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information If data messages received from the IPC over the MS-CAN are missing for 5 seconds or more.

Possible Sources

  • Network communication concern
  • Wiring, terminals or connectors
  • Over or undervoltage concerns
  • IPC
  • HVAC control module
S1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to S2
No CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

S2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Does the IPC pass the network test?
Yes GO to S3
No DIAGNOSE the IPC does not communicate with the diagnostic scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

S3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to S4

S4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For U3003:16 GO to Pinpoint Test AM
For U3003:17 GO to Pinpoint Test AN
No GO to S5

S5 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U0155:00 still present?
Yes GO to S6
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

S6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0155:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, retrieve all continuous memory Diagnostic Trouble Codes (DTCs).

Is DTC U0155:00 set in other modules on the network?
Yes GO to S7
No GO to S8

S7 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the IPC electrical connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect IPC electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (IPC). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

S8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST T : U0164:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Control Logic, REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
RHVAC U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information This DTC sets in the RHVAC control module if data messages received from the HVAC control module are missing for more than 5 seconds.

Possible Sources

  • Vehicle communication bus
  • HVAC control module
  • RHVAC control module
T1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to T2
No CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

T2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Does the HVAC control module pass the network test?
Yes GO to T3
No DIAGNOSE the HVAC control module does not communicate with the diagnostic scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

T3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, carry out the HVAC control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the HVAC control module DTC Chart in this section.
No GO to T4

T4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE (RHVAC) REAR HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For U3003:16 GO to Pinpoint Test AM
For U3003:17 GO to Pinpoint Test AN
No GO to T5

T5 RECHECK THE (RHVAC) REAR HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the RHVAC control module self-test.

Is DTC U0164:00 still present?
Yes GO to T6
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

T6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0164:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, retrieve all continuous memory Diagnostic Trouble Codes (DTCs).

Is DTC U0164:00 set in other modules on the network?
Yes GO to T8
No GO to T7

T7 CHECK FOR CORRECT RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RHVAC control module electrical connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect RHVAC control module electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RHVAC control module. Refer to the appropriate procedure in Group 412-02.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

T8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST U : U0165:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U0165:00 Lost Communication With HVAC Control Module - Rear: No Sub Type Information This DTC sets in the HVAC control module if data messages received from the RHVAC control module are missing for more than 5 seconds.

Possible Sources

  • Vehicle communication bus
  • RHVAC control module
  • HVAC control module
U1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to U2
No CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

U2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Does the RHVAC control module pass the network test?
Yes GO to U3
No DIAGNOSE the RHVAC control module does not communicate with the diagnostic scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

U3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, carry out the RHVAC control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the RHVAC control module DTC Chart in this section.
No GO to U4

U4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For U3003:16 GO to Pinpoint Test AM
For U3003:17 GO to Pinpoint Test AN
No GO to U5

U5 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U0165:00 still present?
Yes GO to U6
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

U6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0165:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, retrieve all continuous memory Diagnostic Trouble Codes (DTCs).

Is DTC U0165:00 set in other modules on the network?
Yes GO to U7
No GO to U8

U7 CHECK FOR CORRECT RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RHVAC control module electrical connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect RHVAC control module electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RHVAC control module. Refer to the appropriate procedure in Group 412-02.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

U8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST V : U0253:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Control Logic, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information This DTC sets in the HVAC control module if data messages received from the APIM are missing for more than 5 seconds.

Possible Sources

  • Vehicle communication bus
  • APIM
  • HVAC control module
V1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to V2
No CLEAR the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

V2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Does the APIM pass the network test?
Yes GO to V3
No DIAGNOSE the APIM does not communicate with the diagnostic scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

V3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE APIM (SYNC MODULE) SELF-TEST
  • Using a diagnostic scan tool, carry out the APIM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the appropriate procedure in Group 415.
No GO to V4

V4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For U3003:16 GO to Pinpoint Test AM
For U3003:17 GO to Pinpoint Test AN
No GO to V5

V5 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U0253:00 still present?
Yes GO to V6
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

V6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0253:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, retrieve all continuous memory Diagnostic Trouble Codes (DTCs).

Is DTC U0253:00 set in other modules on the network?
Yes GO to V7
No GO to V8

V7 CHECK FOR CORRECT APIM (SYNC MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the APIM electrical connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect APIM electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (APIM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

V8 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST W : U1000:00

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Control Logic, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information This DTC sets in the HVAC control module Field-Effect Transistor (FET) protective circuit strategy for its actuator outputs has reached 1/3, 2/3 or 3/3 maximum.

Possible Sources

  • Vehicle communication bus
  • Incomplete or improper PMI procedures
  • HVAC control module
W1 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the Programmable Module Installation (PMI) may not have been carried out.

  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the HVAC control module self-test.

Is U1000:00 present?
Yes For DTC U1000:00, REPAIR all HVAC control module Non Communication Diagnostic Trouble Codes first, then CLEAR codes and TEST for normal operations.
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

PINPOINT TEST X : B102E:11, B102E:15, B102E:92

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Ambient air quality sensor, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B102E:11 Air Quality Sensor: Circuit Short To Ground Module senses lower than expected voltage on the sensor feedback circuit, indicating a short to ground.
HVAC B102E:15 Air Quality Sensor: Circuit Short To Battery Or Open Module senses greater than expected voltage on the sensor feedback circuit, indicating a short to voltage or an open circuit or sensor.
HVAC B102E:92 Air Quality Sensor: Performance Or Incorrect Operation Module senses erratic voltages from the sensor.

Possible Sources

  • Wiring, terminals or connectors
  • Ambient air quality sensor
  • HVAC control module

Visual Inspection and Pre-checks

  • Make sure BCMC fuse 25 (10A) is OK
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
X1 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Disconnect Ambient air quality sensor C1744 .
  • Disconnect BCMC fuse 25 (10A).
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-1   Ground
      C1744-3   Ground

Is there any voltage present?
Yes REPAIR the circuit in question.
No GO to X2

X2 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-1   Ground
      C1744-3   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to X3
No REPAIR the circuit in question.

X3 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-1 BCMC fuse 25 (10A) cavity, (component side)

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-2   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-3   C228A-15

Are the resistances less than 3 ohms?
Yes GO to X4
No REPAIR the circuit in question.

X4 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1744-1   C1744-2
      C1744-1   C1744-3
      C1744-2   C1744-3

Are the resistances greater than 10,000 ohms?
Yes INSTALL a new ambient air quality sensor. REFER to the appropriate procedure in Group 412-00.
TEST the system for normal operation. If the concern is still present, GO to GO to X5
No REPAIR the circuits.

X5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST Y : B1A63:11, B1A63:15, B1A64:11, B1A64:15

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The sunload sensor supplies information to the HVAC control module indicating the sunload intensity on the vehicle and the HVAC control module adjusts the system based on that information.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B1A63:11 Right Solar Sensor: Circuit Short To Ground Module senses a short to ground from the right sunload sensor feedback circuit.
HVAC B1A63:15 Right Solar Sensor: Circuit Short To Battery Or Open Module senses an open or a short to voltage from the right sunload sensor feedback circuit.
HVAC B1A64:11 Left Solar Sensor: Circuit Short To Ground Module senses a short to ground from the left sunload sensor feedback circuit.
HVAC B1A64:15 Left Solar Sensor: Circuit Short To Battery Or Open Module senses an open or a short to voltage from the left sunload sensor feedback circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Autolamp and sunload sensor
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
Y1 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect Sunload sensor C286 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C286-1   Ground
      C286-2   Ground
      C286-3   Ground
      C286-4   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to Y2

Y2 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C286-1   Ground
      C286-2   Ground
      C286-3   Ground
      C286-4   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to Y3
No REPAIR the circuit.

Y3 CHECK THE SUNLOAD SENSOR CIRCUITS FOR AN OPEN
  • Disconnect BCM C2280B .
  • Disconnect HVAC control module C228B .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C286-1   C228B-22
      C286-3   C228B-21

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C286-2   C2280B-24
      C286-4   C2280B-22

Are the resistances less than 3 ohms?
Yes GO to Y4
No REPAIR the circuit.

Y4 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C286-1   C286-2
      C286-1   C286-3
      C286-1   C286-4
      C286-2   C286-3
      C286-2   C286-4
      C286-3   C286-4

Are the resistances greater than 10,000 ohms?
Yes INSTALL a new sunload sensor. Refer to the appropriate procedure in Group 412.
CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to Y5
No REPAIR the circuits.

Y5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST Z : B10B3:11, B10B3:15, B10B4:11, B10B4:15, B10B5:11, B10B5:15, B10B6:11, B10B6:15

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The air discharge sensors supply a varying voltage to the HVAC control module based on the temperature of the air being discharged from the vent. The HVAC control module adjusts the system based on the voltage from each sensor.

Each air discharge sensor is supplied voltage from the HVAC control module and all sensors share a common sensor ground. An open, a short to ground, a short to voltage on one or more of these circuits or a failed air discharge sensor causes the HVAC control module to set one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10B3:11 Right Panel Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B3:15 Right Panel Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B4:11 Right Floor Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B4:15 Right Floor Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B5:11 Left Panel Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B5:15 Left Panel Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B6:11 Left Floor Air Discharge Temperature: Circuit Short To Ground Module senses erratic voltages from the air discharge temperature sensor.
HVAC B10B6:15 Left Floor Air Discharge Temperature: Circuit Short To Battery Or Open Module senses erratic voltages from the air discharge temperature sensor.

Possible Sources

  • Wiring, terminals or connectors
  • Air discharge temperature sensor
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
Z1 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR OUTPUT VOLTAGE
  • Ignition OFF.
  • Disconnect the suspect air discharge temperature sensor:
    • Driver Side Footwell (Floor) Air Discharge Temperature Sensor C2436
    • Passenger Side Footwell (Floor) Air Discharge Temperature Sensor C2437
    • Driver Side Register (Panel) Air Discharge Temperature Sensor C2438
    • Passenger Side Register (Panel) Air Discharge Temperature Sensor C2439
  • Ignition ON.
  • On the HVAC controls, select PANEL mode.
  • For the Driver Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2436-1   C2436-3
  • For the Passenger Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2437-1   C2437-3
  • For the Driver Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-1   C2438-3
  • For the Passenger Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-1   C2439-3

Are the voltages between 4.7 and 5.1 volts?
Yes INSTALL a new air discharge temperature sensor. REFER to the appropriate procedure in Group 412-00.
CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to Z6
No GO to Z2

Z2 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A and C228B .
  • Ignition ON.
  • For the Driver Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2436-1   Ground
      C2436-3   Ground
  • For the Passenger Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2437-1   Ground
      C2437-3   Ground
  • For the Driver Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-1   Ground
      C2438-3   Ground
  • For the Passenger Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-1   Ground
      C2439-3   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to Z3

Z3 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • For the Driver Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2436-1   Ground
      C2436-3   Ground
  • For the Passenger Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2437-1   Ground
      C2437-3   Ground
  • For the Driver Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-1   Ground
      C2438-3   Ground
  • For the Passenger Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-1   Ground
      C2439-3   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to Z4
No REPAIR the circuit.

Z4 CHECK THE AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR AN OPEN
  • For the Driver Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2436-1   C228A-25
      C2436-3   C228A-26
  • For the Passenger Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2437-1   C228A-24
      C2437-3   C228A-26
  • For the Driver Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-1   C228B-7

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-3   C228A-26
  • For the Passenger Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-1   C228B-6

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-3   C228A-26

Are the resistances less than 3 ohms?
Yes GO to Z5
No REPAIR the circuit.

Z5 CHECK AIR DISCHARGE TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO TOGETHER
  • For the Driver Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2436-1   C2436-3
  • For the Passenger Side Footwell (Floor) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2437-1   C2437-3
  • For the Driver Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2438-1   C2438-3
  • For the Passenger Side Register (Panel) Air Discharge Temperature Sensor, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2439-1   C2439-3

Are the resistances greater than 10,000 ohms?
Yes INSTALL a new air discharge temperature sensor. REFER to the appropriate procedure in Group 412-00.
CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to Z6
No REPAIR the circuit.

Z6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AA : P193E

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The PCM controls the A/C compressor clutch field coil based on messages received from the BCM over the HS-CAN. When the HVAC control module determines it is necessary to activate the A/C compressor, either due to driver request or due to automatic climate control settings, the HVAC control module sends a message to the BCM over the MS-CAN, the BCM then sends a message to the PCM to activate the A/C compressor.

An internal failure of the PCM, BCM or HVAC control module; or a failure in the MS-CAN or HS-CAN causes the PCM to set a DTC.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P193E:00 A/C Clutch Request Signal: No Sub Type Information This DTC sets when the PCM does not receive the A/C enable request from the BCM.

Possible Sources

  • Network concerns
  • BCM
  • PCM
  • HVAC control module
AA1 VERIFY THE CUSTOMER CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to AA2
No CLEAR the DTC. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AA2 CHECK THE COMMUNICATION NETWORK
  • Using a diagnostic scan tool, carry out the network test.

Do the BCM, PCM and the HVAC control module pass the network test?
Yes GO to AA3
No DIAGNOSE the BCM, HVAC control module or the PCM does not communicate with the diagnostic scan tool.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

AA3 CHECK THE PCM (POWERTRAIN CONTROL MODULE) A/C (AIR CONDITIONING) REQUEST SIGNAL PID (PARAMETER IDENTIFICATION)
  • Start the engine.
  • Access the  PCM  and monitor the  AC_REQ  PID

  • On the HVAC controls, select PANEL mode, then press the A/C button (indicator ON).

Does the PID display YES when the A/C button indicator is illuminated?
Yes GO to AA7
No GO to AA4

AA4 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE A/C (AIR CONDITIONING) SWITCH PID (PARAMETER IDENTIFICATION)
  • Access the  HVAC  and monitor the  CC_SW_AC  PID

  • On the HVAC controls, press and release the A/C button.

Does the PID display ON when the A/C button indicator is illuminated?
Yes GO to AA6
No GO to AA5

AA5 VERIFY CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AA6 VERIFY CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCM electrical connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all BCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AA7 VERIFY CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals or pins
    • pushed-out pins – install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AB : C1B14:11, C1B14:12

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Reference voltage is supplied to the climate control actuators and one sensor from the HVAC control module on one common circuit and the signal returns to the HVAC control module on one common circuit. All components that share these two circuits are listed in this pinpoint test. Access to these components are difficult.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC C1B14:11 Sensor Supply Voltage A: Circuit Short To Ground This DTC sets when the module senses less than 4.5 volts on the actuator voltage supply circuit, indicating a short to ground.
HVAC C1B14:12 Sensor Supply Voltage A: Circuit Short To Battery This DTC sets when the module senses greater than 5.5 volts on the actuator voltage supply circuit, indicating a short to voltage.

Possible Sources

  • Wiring, terminals or connectors
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AB1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, perform HVAC control module self-test.

Is DTC C1B14:11 or C1B14:12 present?
Yes GO to AB2
No VERIFY a customer concern. REFER to the symptom chart in this section.

AB2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE REFERENCE VOLTAGE AND SIGNAL RETURN CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to AB3

AB3 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE REFERENCE VOLTAGE AND SIGNAL RETURN CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AB4
No REPAIR the circuit.

AB4 CHECK THE REFERENCE VOLTAGE CIRCUIT AND THE SIGNAL RETURN CIRCUIT FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   C228A-2

Is the resistance greater than 200 ohms?
Yes GO to AB6
No GO to AB5

AB5 CHECK THE A/C (AIR CONDITIONING) COMPONENTS
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   C228A-2
  • While measuring the resistance, disconnect the following components one at a time, in order. Stop disconnecting components if the measured resistance rises above 200 ohms.
    • Air distribution door actuator C236
    • Air inlet door actuator C289
    • Driver side temperature door actuator C2091
    • Passenger side temperature door actuator C2092
    • In-vehicle temperature and humidity sensor C910
    • Rear air distribution door actuator C4854
    • Rear temperature door actuator C4855

Did the resistance rise above 200 ohms?
Yes INSTALL a new sensor or actuator (the last one to be disconnected). Refer to the appropriate section in Group 412 for the procedure. When installing an actuator, CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected.
No REPAIR the circuits.

AB6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AC : THE REAR BLOWER MOTOR IS INOPERATIVE

Refer to Wiring Diagrams Cell 52 for schematic and connector information.

Normal Operation and Fault Conditions

Rear blower motor. REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10BA:12 Rear Blower Control: Circuit Short To Battery Module senses high voltage on the blower motor speed control PWM circuit, indicating a short directly to battery. The blower motor is inoperative.
HVAC B10BA:14 Rear Blower Control: Circuit Short To Ground Or Open Module senses no voltage on the blower motor speed control PWM circuit, indicating a short directly to ground or an open circuit. The blower motor will be at full speed if the circuit is shorted to ground. The blower motor will be inoperative with an open circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Fuse
  • Rear blower motor relay (non-serviceable, part of BJB)
  • Rear blower motor
  • Rear blower motor speed control
  • HVAC control module

Visual Inspection and Pre-checks

  • Make sure BCMC fuse 88 (20A) is OK.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
AC1 CHECK THE REAR BLOWER MOTOR OPERATION
  • Ignition ON.
  • On the HVAC controls, select each rear blower motor speed position.

Does the rear blower motor operate in any position?
Yes GO to Pinpoint Test AD
No GO to AC2

AC2 CHECK THE REAR BLOWER MOTOR SPEED CONTROL GROUND CIRCUIT
  • Ignition OFF.
  • Disconnect Rear blower motor speed control C4343 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-1   Ground

Is the resistance less than 3 ohms?
Yes GO to AC3
No REPAIR the circuit.

AC3 CHECK THE REAR BLOWER MOTOR SPEED CONTROL AND REAR BLOWER MOTOR SUPPLY VOLTAGE CIRCUITS FOR AN OPEN
  • Disconnect Rear blower motor C4334 .
  • Disconnect BCMC C1035A .
  • Measure:
    Click to display connectors

      Rear blower motor speed control


    Positive Lead Measurement / Action Negative Lead
      C4343-5   C1035A-5

    Click to display connectors

      Rear blower motor


    Positive Lead Measurement / Action Negative Lead
      C4334-1   C1035A-5

Are the resistances less than 3 ohms?
Yes GO to AC4
No REPAIR the circuit.

AC4 CHECK THE REAR BLOWER MOTOR SPEED CONTROL FOR SUPPLY VOLTAGE
  • Connect BCMC C1035A .
  • Ignition ON.
  • On the HVAC controls, select the highest rear blower speed.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-5   C4343-1

Is the voltage greater than 11 volts?
Yes GO to AC5
No VERIFY BCMC fuse 88 (20A) is OK.
If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
If OK, INSTALL a new BCMC.

AC5 CHECK THE PWM (PULSE WIDTH MODULATION) CIRCUIT BETWEEN THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE AND THE REAR BLOWER MOTOR SPEED CONTROL FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228C .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-2   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to AC6

AC6 CHECK THE PWM (PULSE WIDTH MODULATION) CIRCUIT BETWEEN THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE AND THE REAR BLOWER MOTOR SPEED CONTROL FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AC7
No REPAIR the circuit.

AC7 CHECK THE PWM (PULSE WIDTH MODULATION) CIRCUIT BETWEEN THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE AND THE REAR BLOWER MOTOR SPEED CONTROL FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-2   C228C-18

Is the resistance less than 3 ohms?
Yes GO to AC8
No REPAIR the circuit.

AC8 CHECK FOR REAR BLOWER MOTOR FUNCTIONALITY WITH A TEST LIGHT IN PLACE OF THE REAR BLOWER MOTOR

NOTICE: The following pinpoint test step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or equivalent 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.

  • Connect rear blower motor speed control C4343. Make sure it seats and latches correctly.
  • Connect HVAC control module C228C. Make sure it seats and latches correctly.
  • Connect:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4334-1   C4334-2
  • Ignition ON.
  • On the HVAC controls, select the highest rear blower speed position.

Does the test lamp illuminate?
Yes INSTALL a new rear blower motor. Refer to the appropriate procedure in Group 412-02.
No GO to AC9

AC9 CHECK THE REAR BLOWER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC fuse 88 (20A).
  • Disconnect Rear blower motor speed control C4343 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4334-1   Ground
      C4334-2   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to AC10

AC10 CHECK THE REAR BLOWER MOTOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4334-1   Ground
      C4334-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AC11
No REPAIR the circuit in question.

AC11 CHECK THE REAR BLOWER MOTOR GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4334-2   C4343-6

Are the resistances less than 3 ohms?
Yes CONNECT the rear blower motor and the BCMC fuse 88 (20A). GO to AC12
No REPAIR the circuit in question.

AC12 CHECK FOR CORRECT REAR BLOWER MOTOR SPEED CONTROL OPERATION
  • Inspect the rear blower motor speed control electrical connector.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect the rear blower motor speed control electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new rear blower motor speed control. Refer to the appropriate procedure in Group 412-02. TEST the system for normal operation. If the concern is still present, GO to AC13
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AC13 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AD : THE REAR BLOWER MOTOR DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 52 for schematic and connector information.

Normal Operation and Fault Conditions

Rear blower motor. REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10BA:14 Rear Blower Control: Circuit Short To Ground Or Open Module senses no voltage on the blower motor speed control PWM circuit, indicating a short directly to ground or an open circuit. The blower motor will be at full speed if the circuit is shorted to ground. The blower motor will be inoperative with an open circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Rear blower motor speed control
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
AD1 CHECK THE REAR BLOWER MOTOR OPERATION
  • Ignition ON.
  • On the RHVAC controls, select each blower speed position.

Does the rear blower motor operate in any position?
Yes GO to AD2
No GO to Pinpoint Test AC

AD2 CHECK THE REAR BLOWER MOTOR SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC fuse 40 (40A).
  • Disconnect Rear blower motor speed control C4343 .
  • Disconnect HVAC control module C228A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-2   Ground
      C4343-5   Ground
      C4343-6   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to AD3

AD3 CHECK THE REAR BLOWER MOTOR SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4343-2   Ground
      C4343-5   Ground
      C4343-6   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AD4
No REPAIR the circuit in question.

AD4 CHECK FOR CORRECT REAR BLOWER MOTOR SPEED CONTROL OPERATION
  • Disconnect and inspect all rear blower motor speed control electrical connectors.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all rear blower motor speed control electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new rear blower motor speed control. REFER to the appropriate procedure in Group 412-02. TEST the system for normal operation. If the concern is still present, GO to AD5
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AD5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AE : INCORRECT OR ERRATIC DIRECTION OF AIRFLOW FROM OUTLETS ON RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) SYSTEM

Refer to Wiring Diagrams Cell 52 for schematic and connector information.

Normal Operation and Fault Conditions

Air handling, REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B11E4:07 Rear Air Distribution Damper Motor: Mechanical Failures Module senses the actuator motor control is awake, no actuator drive, stall before achieving target position within 15 seconds. This failure could be due to an open circuit or mechanical failure.
HVAC B11E4:11 Rear Air Distribution Damper Motor: Circuit Short To Ground Module senses less than 1 volt on the actuator feedback circuit, indicating a short to ground.
HVAC B11E4:12 Rear Air Distribution Damper Motor: Circuit Short To Battery Module senses a short to voltage or an open on the actuator circuits when motor movement is commanded.
HVAC B11E4:13 Rear Air Distribution Damper Motor: Circuit Open Module senses a short to voltage on the temperature door actuator circuits when motor movement is commanded.
HVAC B1B7D:11 Rear Air Distribution Actuator: Circuit Short To Ground Module senses higher than expected voltage on the actuator motor circuit when ground is applied to drive the motor, indicating a short to voltage.
HVAC B1B7D:15 Rear Air Distribution Actuator: Circuit Short To Battery Or Open Module senses no voltage on the actuator motor circuit when ground is applied to drive the motor, indicating a open circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Rear air distribution door actuator
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
AE1 CHECK THE REAR AIR DISTRIBUTION DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A and C228C .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-15   Ground
      C228C-16   Ground
      C228C-8   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to AE2

AE2 CHECK THE REAR AIR DISTRIBUTION DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-15   Ground
      C228C-16   Ground
      C228C-8   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AE3
No REPAIR the circuit in question.

AE3 CHECK THE REAR AIR DISTRIBUTION MODE DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Rear air distribution door actuator C4854 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-15   C4854-1
      C228C-16   C4854-2
      C228C-8   C4854-5

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   C4854-4
      C228A-2   C4854-6

Are the resistances less than 3 ohms?
Yes GO to AE4
No REPAIR the circuit.

AE4 CHECK THE REAR AIR DISTRIBUTION MODE DOOR ACTUATOR POWER CIRCUITS FOR VOLTAGE
  • Connect HVAC control module C228A and C228C .
  • Ignition ON.
  • On the front HVAC controls, select the Rear power ON.
  • On the RHVAC controls, select the temperature setting between cold and hot, and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4854-4   Ground

Is any voltage present?
Yes GO to AE5
No GO to Pinpoint Test AB

AE5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the rear air distribution door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new rear air distribution door actuator. Refer to the appropriate procedure in Group 412-02. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to AE6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AE6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AF : REAR TEMPERATURE DOOR IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Air handling, REFER to: Rear Climate Control - System Operation and Component Description (412-02 Rear Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10B7:11 Rear Air Discharge Temperature: Circuit Short To Ground Module senses a short to ground on rear temperature door actuator feedback circuit when motor movement is commanded.
HVAC B10B7:15 Rear Air Discharge Temperature: Circuit Short To Battery Or Open Module senses a short to voltage or an open on rear temperature door actuator feedback circuit when motor movement is commanded.
HVAC B11E3:07 Rear HVAC Damper Motor: Mechanical Failures Module senses an open on rear temperature door actuator circuits when motor movement is commanded. This failure could be due to an open circuit or mechanical failure.
HVAC B11E3:11 Rear HVAC Damper Motor: Circuit Short To Ground Module senses a short to ground on rear temperature door actuator motor circuits. Motor move only possible in one direction.
HVAC B11E3:12 Rear HVAC Damper Motor: Circuit Short To Battery Module senses a short to voltage on rear temperature door actuator motor circuits when motor movement is commanded. Motor move only possible in one direction.
HVAC B11E3:13 Rear HVAC Damper Motor: Circuit Open Module senses an open on rear temperature door actuator motor circuits when motor movement is commanded. Motor move only possible in one direction.

Possible Sources

  • Wiring, terminals or connectors
  • Rear temperature door actuator
  • Rear temperature door binding or stuck
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
AF1 CHECK THE REAR TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228A and C228C .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-11   Ground
      C228C-12   Ground
      C228C-6   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Is any voltage present?
Yes REPAIR the circuit in question.
No GO to AF2

AF2 CHECK THE REAR TEMPERATURE DOOR ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-11   Ground
      C228C-12   Ground
      C228C-6   Ground

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   Ground
      C228A-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AF3
No REPAIR the circuit in question.

AF3 CHECK THE REAR TEMPERATURE DOOR ACTUATOR CIRCUITS FOR AN OPEN
  • Disconnect Rear air distribution door actuator C4855 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228C-11   C4855-1
      C228C-12   C4855-2
      C228C-6   C4855-5

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228A-3   C4855-4
      C228A-2   C4855-6

Are the resistances less than 3 ohms?
Yes GO to AF4
No REPAIR the circuit.

AF4 CHECK THE REAR TEMPERATURE DOOR ACTUATOR POWER CIRCUIT FOR VOLTAGE
  • Connect HVAC control module C228A and C228C .
  • Ignition ON.
  • On the front HVAC controls, select the Rear power ON.
  • On the RHVAC controls, select the temperature setting between cold and hot, and the blower to the lowest setting.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4855-4   Ground

Is any voltage present?
Yes GO to AF5
No GO to Pinpoint Test AB

AF5 CHECK FOR CORRECT ACTUATOR OPERATION
  • Ignition OFF.
  • Disconnect and inspect the rear temperature door actuator connector (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all disconnected connectors. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes INSTALL a new rear temperature door actuator. Refer to the appropriate procedure in Group 412-02. CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected. TEST the system for normal operation. If the concern is still present, GO to AF6
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AF6 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AG : THE AUTO START-STOP DEACTIVATION INDICATOR IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The instrument panel console switch assembly - auto start-stop deactivation switch, REFER to: Climate Control System - System Operation and Component Description (412-00 Climate Control System - General Information, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B12CA:11 Start/Stop "Eco-Start" Status Indicator: Circuit Short To Ground This DTC sets when the HVAC control module senses lower than expected voltage on the circuits, indicating a short to ground.
HVAC B12CA:15 Start/Stop "Eco-Start" Status Indicator: Circuit Short To Battery Or Open This DTC sets when the HVAC control module senses greater than expected voltage on the circuits, indicating a short to voltage.

Possible Sources

  • Wiring, terminals or connectors
  • Instrument panel console switch assembly
  • HVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AG1 CHECK THE AUTO START-STOP DEACTIVATION SWITCH INDICATOR AND LED (LIGHT EMITTING DIODE) CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect HVAC control module C228B .
  • Disconnect Drive mode switch C3685 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-23   Ground
      C228B-24   Ground

Is any voltage present?
Yes REPAIR the affected circuits.
No GO to AG2

AG2 CHECK THE AUTO START-STOP DEACTIVATION SWITCH INDICATOR AND LED (LIGHT EMITTING DIODE) CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-23   Ground
      C228B-24   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AG3
No REPAIR the affected circuits.

AG3 CHECK THE AUTO START-STOP DEACTIVATION SWITCH INDICATOR AND LED (LIGHT EMITTING DIODE) CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-23   C3685-4
      C228B-24   C3685-11

Are the resistances less than 3 ohms?
Yes GO to AG4
No REPAIR the affected circuits.

AG4 CHECK THE AUTO START-STOP DEACTIVATION SWITCH INDICATOR AND LED (LIGHT EMITTING DIODE) CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C228B-23   C228B-24

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new drive mode switch. TEST the system for normal operation. If the concern is still present, GO to AG5
No REPAIR the circuits.

AG5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AH : B10B8:63

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Climate control system buttons held too long may set this DTC.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC B10B8:63 Push Buttons: Circuit/Component Protection Time-Out Buttons held too long may set this DTC.
RHVAC B10B8:63 Push Buttons: Circuit/Component Protection Time-Out Buttons held too long may set this DTC.

Possible Sources

  • HVAC control module
  • RHVAC control module
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AH1 CLEAN HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE BUTTONS
  • Ignition OFF.
  • Disconnect all HVAC control module connectors or the RHVAC control module connector.
  • Attempt to clean the buttons on the HVAC controls in question. For additional information about recommended cleaning products, refer to the Owner's Literature.
  • Connect all disconnected electrical connectors. Make sure they seat and latch correctly.
  • Ignition ON.
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) on the module in question.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes For the HVAC control module, GO to AH2
For the RHVAC control module, GO to AH3
No The system is operating correctly at this time. The concern may have been caused by a stuck or a dirty button.

AH2 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AH3 CHECK FOR CORRECT RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RHVAC control module electrical connector.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect the RHVAC control module electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RHVAC control module. REFER to the appropriate procedure in Group 412-02.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AI : ACCM (AIR CONDITIONING CONTROL MODULE) A/C (AIR CONDITIONING) ELECTRIC COMPRESSOR INOPERATIVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The ACCM is an integral part of the A/C electric compressor and cannot be removed from or serviced separately. The ACCM has both low voltage and high voltage electrical connections. The ACCM requires a low voltage system operating voltage between 9 and 16 volts. The ACCM also requires high voltage system operating voltage between 100 and 467 volts. The ACCM has a single ground circuit located in the engine compartment wiring harness. Excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system results in the ACCM setting a DTC.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM P0562:00 System Voltage Low: No Sub Type Information This DTC sets when the ACCM detects low voltage system voltage is below 8.5 volts. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM P0563:00 System Voltage High: No Sub Type Information This DTC sets when the ACCM detects low voltage system voltage is above 16.5 volts. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM P0AFA:16 Hybrid/EV Battery System Voltage Low: Circuit Voltage Below Threshold This DTC sets when the ACCM detects high voltage system voltage drops below 100 volts. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM P0AFB:17 Hybrid/EV Battery System Voltage High: Circuit Voltage Above Threshold This DTC sets when the ACCM detects High voltage system voltage greater than 494 volts. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM P0AFB:1C Hybrid/EV Battery System Voltage High: Circuit Voltage Out Of Range This DTC sets when the ACCM detects High voltage system voltage greater than 650 volts. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM B11EE:19 A/C Compressor: Circuit Current Above Threshold This DTC sets when the ACCM detects excessive current on the low voltage circuit. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM B11EE:4B A/C Compressor: Over Temperature This DTC sets when the ACCM detects excessive internal heat. The A/C electric compressor motor is stopped. A/C doesn't work.
ACCM B11EE:92 A/C Compressor: Performance Or Incorrect Operation This DTC sets when the ACCM detects the number of stops due to "software overcurrent" or "start failure" exceeds a specified value. The A/C electric compressor motor is stopped. A/C doesn't work.
SOBDMC P0D6D:00 A/C Compressor "A" Motor Voltage "A" Low: No Sub Type Information Signal received from ACCM indicates motor voltage out of range.
SOBDMC P0D6F:00 A/C Compressor "A" Motor Current High: No Sub Type Information Test fails when signal from ACCM indicates motor current too high.
SOBDMC P0D71:00 A/C Compressor Control Module Internal Temperature Sensor "A" Performance: No Sub Type Information Test fails when ACCM indicates internal temperature sensor performance fault.
SOBDMC P26FD:00 A/C Compressor "A" Internal Control Module Performance: No Sub Type Information Test fails when ACCM indicates internal control module performance fault
SOBDMC P2D41:00 A/C Compressor "A" Motor Voltage "B" Performance: No Sub Type Information Test fails when ACCM indicates motor voltage "B" fault.
SOBDMC P2D42:00 A/C Compressor "A" Motor Voltage "B" Low: No Sub Type Information Test fails when ACCM indicates motor voltage "B" fault.
SOBDMC P2D44:00 A/C Compressor "A" Motor Performance: No Sub Type Information Test fails when ACCM indicates motor performance fault.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • ACCM [ A/C electric compressor]
AI1 PERFORM THE DCDC (DIRECT CURRENT/DIRECT CURRENT CONVERTER CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, perform the DCDC self-test.

Are any DCDC Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: Direct Current/Direct Current (DC/DC) Converter Control Module (414-05 Voltage Converter/Inverter, Diagnosis and Testing).
No GO to AI2

AI2 PERFORM THE BECM (BATTERY ENERGY CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, perform the BECM self-test.

Are any BECM Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: High Voltage Battery, Mounting and Cables (414-03 High Voltage Battery, Mounting and Cables, Diagnosis and Testing).
No GO to AI3

AI3 RECHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

  WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.

NOTE: Before performing this pinpoint test, ensure the high voltage battery is at least 50 % charged. For charging information, refer to the appropriate workshop manual section 414-03.

NOTE: Before testing of the Air Conditioning (A/C) electric compressor Air Conditioning Control Module (ACCM) with a diagnostic scan tool can be performed on a Highbrid Electric Vehicle (HEV), the vehicle must be in Ready to Drive mode. Switch the ignition on with transmission selector lever in position P. Look for the green ready indicator light to appear in the lower right portion of the instrument cluster and a ready to drive message to appear in the middle of the left cluster screen.

  • Ignition ON.
  • Place vehicle in Ready to Drive mode.
  • Using a diagnostic scan tool, clear the ACCM Diagnostic Trouble Codes (DTCs).
  • Using a diagnostic scan tool, perform the ACCM self-test.

Does DTC P0562:00, P0563:00, P0AFA:16, P0AFB:17, P0AFB:1C, B11EE:19, B11EE:4B or B11EE:92 return?
Yes GO to AI4
No IGNORE the DTC and CONTINUE diagnosing other Diagnostic Trouble Codes (DTCs) or symptoms. GO to the ACCM DTC Chart or Symptom Chart – Climate Control in this section.

AI4 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) MAIN ECU VOLTAGE SUPPLY MAINECUV PID (PARAMETER IDENTIFICATION)
  • With the vehicle in Ready to Drive mode,

    Access the  ACCM  and monitor the  MAINECUV (V)  PID

    .

Is the voltage PID between 9 volts and 16 volts?
Yes GO to AI7
No GO to AI5

AI5 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) LOW VOLTAGE SUPPLY CIRCUIT

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

  • Ignition OFF.
  • Disconnect ACCM C1803A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1803A-1   Ground

Is the voltage greater than 11 volts?
Yes GO to AI6
No VERIFY BCMC fuses 8 (20A) or 14 (15A) are OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

AI6 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) GROUND CIRCUIT
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1803A-4   Ground

Is the resistance less than 3 ohms?
Yes GO to AI7
No REPAIR the circuit.

AI7 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) ELECTRIC A/C COMPRESSOR HIGH VOLTAGE SUPPLY PID (PARAMETER IDENTIFICATION)
  • With the vehicle in Ready to Drive mode,

    Access the  ACCM  and monitor the  ACCM_CHVS (V)  PID

    .

Is the voltage supply PID between 100 volts and 467 volts?
Yes GO to AI10
No GO to AI8

AI8 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) ELECTRIC A/C COMPRESSOR HIGH VOLTAGE CABLES FOR AN OPEN
  • Ignition OFF.
  • Depower the High Voltage Battery system.
    REFER to: High Voltage System De-energizing (414-03 High Voltage Battery, Mounting and Cables, General Procedures).
  • Disconnect ACCM C1803B .
  • Disconnect For HEV, DCDC C1457A .
  • Disconnect For PHEV, Cabin coolant heater C1815A .
  • Measure:
    Click to display connectors

      HEV


    Positive Lead Measurement / Action Negative Lead
      C1457A-1   C1803B-A
      C1457A-4   C1803B-B

    Click to display connectors

      PHEV


    Positive Lead Measurement / Action Negative Lead
      C1803B-B   C1815A-1
      C1803B-A   C1815A-4

Are the resistances less than 3 ohms?
Yes GO to AI9
No For HEV, INSPECT the high voltage cable between the ACCM and the DCDC for signs of an obvious short condition. INSTALL new (14B322) cable.
REFER to: High Voltage Battery Cables - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation). For PHEV, INSPECT the high voltage cable between the ACCM and the Cabin coolant heater for signs of an obvious short condition. INSTALL new (14B322) or (14B323) cable.

AI9 CHECK THE HIGH VOLTAGE LOW CURRENT FUSE

  WARNING: Never install the service disconnect plug when a high-voltage service cover is removed. Always install the cover prior to connecting the service disconnect plug. The cover prevents inadvertent contact with the high voltage which is present at several points under the cover. Failure to follow these instructions may result in serious personal injury or death.

  • Ignition OFF.
  • Depower the High Voltage Battery system.
    REFER to: High Voltage System De-energizing (414-03 High Voltage Battery, Mounting and Cables, General Procedures).
  • Remove the High Voltage Battery electronics cover.
    REFER to: High Voltage Low Current Fuse - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation).
  • For HEV, measure the resistance of the high voltage low current fuse.
  • For PHEV, measure the resistance of the high voltage low current fuse.

Is the resistance less than 3 ohms?
Yes GO to AI10
No INSTALL a new (50A) high voltage low current fuse. For HEV, INSPECT the high voltage cable between the ACCM and the DCDC for signs of an obvious short condition. INSTALL new (14B322) cable.
REFER to: High Voltage Battery Cables - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation). For PHEV, INSPECT the high voltage cable between the ACCM and the Cabin coolant heater for signs of an obvious short condition. INSTALL new (14B322) or (14B323) cable.
CLEAR all Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the concern is still present, GO to AI10

AI10 CHECK FOR CORRECT ACCM (AIR CONDITIONING CONTROL MODULE) OPERATION

NOTE: Before testing of the Air Conditioning (A/C) electric compressor Air Conditioning Control Module (ACCM) with a diagnostic scan tool can be performed on a Highbrid Electric Vehicle (HEV), the vehicle must be in Ready to Drive mode. Switch the ignition on with transmission selector lever in position P. Look for the green ready indicator light to appear in the lower right portion of the instrument cluster and a ready to drive message to appear in the middle of the left cluster screen.

  • Ignition OFF.
  • Disconnect and inspect all ACCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect all ACCM connectors. Make sure they seat and latch correctly.
  • Place vehicle in Ready to Drive mode.
  • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Wait 10 seconds.
  • Place vehicle in Ready to Drive mode.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new A/C electric compressor.
REFER to: Air Conditioning (A/C) Compressor - 3.3L Duratec-V6 – Hybrid (BP) (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AJ : CHECK THE CABIN COOLANT HEATER OPERATION P01EB:96, P2DA4:00, P2DA5:00, P2DA6:00, P2DA7:00, U069E:81, U069E:87

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Cabin coolant heater , REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
SOBDMC P01EB:96 Engine Coolant Heater "A" Control Circuit Performance: Component Internal Failure This fault is due to an issue with the cabin coolant heater or its cooling loop. Check for low coolant levels, blocked valves, kinked hoses, miss-routed hoses, malfunctioning coolant pumps. If heater is working, and system is providing heat to cabin, check temperature sensors. Verify High Voltage connection to heater is connected and no issues with cable.
SOBDMC P2DA4:00 Coolant Heater "A" Internal Control Module Performance: No Sub Type Information Test fails in the following conditions: cabin coolant heater reports an internal electrical short, cabin coolant heater reports a temperature sensor fault, cabin coolant heater reports a current sensor fault. Cabin coolant heater disabled.
SOBDMC P2DA5:00 Coolant Heater "A" Supply Voltage Circuit: No Sub Type Information Test fails when cabin coolant heater reports a power supply fault. This is a fault reported by the cabin coolant heater and points to a fault within the cabin coolant heater itself. Cabin coolant heater disabled.
SOBDMC P2DA6:00 Coolant Heater "A" Over Temperature: No Sub Type Information Test fails when cabin coolant heater reports an over temperature fault. This is a fault reported by the cabin coolant heater and points to a fault within the cabin coolant heater itself. Cabin coolant heater disabled.
SOBDMC P2DA7:00 Coolant Heater "A" Control Module System Voltage: No Sub Type Information Test fails when cabin coolant heater reports a HV voltage out of range fault. Cabin coolant heater disabled.
SOBDMC U069E:81 Lost Communication with Coolant Heater "A": Invalid Serial Data Received Cabin coolant heater communicates over a LIN bus circuit. This is likely caused by an intermittent LIN fault.
SOBDMC U069E:87 Lost Communication with Coolant Heater "A": Missing Message Cabin coolant heater communicates over a LIN bus circuit. If other LIN modules are missing communication, LIN wiring may be faulty. If this is the only LIN module missing, the heater or its leg of the LIN bus could be faulty.

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • Cabin coolant heater

Visual Inspection and Pre-checks

  • Verify BCMC fuse 97 (10A) is OK.
  WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
NOTE: Before performing this pinpoint test, ensure the high voltage battery is at least 50 % charged. For charging information, refer to section 414-03.
AJ1 CHECK THE CABIN COOLANT HEATER USING THE PARAMETER IDENTIFICATION (PID)

NOTICE: Running of the cabin coolant heater without running the cabin heater coolant pump may cause damage to the cabin coolant heater.

NOTE: Before an active command of the Cabin Heater Coolant Pump, the Cabin Coolant Heater or the Cabin Heater Coolant Diverter Valve can be performed, the vehicle must be in Ready to Drive mode. Switch the ignition on with transmission selector lever in position P. Look for the green ready indicator light to appear in the lower right portion of the instrument cluster and a ready to drive message to appear in the middle of the left cluster screen.

  • Place vehicle in Ready to Drive mode.
  • Press the EV button (center console) & select EV Now.
  • Set the HVAC controls to Auto and set the temperature to 80°F.
  • Access the  SOBDMC  and control the  HTRCABIN_PWM (%)  PID

  • Touch the heater core hoses.

Do the heater core hoses increase in temperature?
Yes GO to AJ10
No GO to AJ2

AJ2 CHECK THE ACCM (AIR CONDITIONING CONTROL MODULE) HIGH VOLTAGE SUPPLY PID (PARAMETER IDENTIFICATION)

NOTE: The Cabin Coolant Heater and the Air Conditioning Control Module share the same High Voltage source. Monitor the ACCM HV PID.

  • With the vehicle in Ready to Drive mode,

    Access the  ACCM  and monitor the  ACCM_CHVS (V)  PID


Is the voltage supply PID between 100 volts and 467 volts?
Yes GO to AJ6
No GO to AJ3

AJ3 CHECK FOR PARTIALLY MATED HIGH VOLTAGE CONNECTORS
  • Ignition OFF.
  • Depower the High Voltage Battery system.
    REFER to: High Voltage System De-energizing (414-03 High Voltage Battery, Mounting and Cables, General Procedures).
  • Inspect the high voltage (14B323) ACCM C1803B, C1222 and Cabin coolant heater C1815A (14B322) for partially mated connections.

Are any of the connectors not fully seated?
Yes RECONNECT the disconnected connectors. Make sure they seat and latch correctly. TEST the system for normal operation. If the concern is still present, GO to AJ4
No GO to AJ4

AJ4 CHECK THE CABIN COOLANT HEATER HIGH VOLTAGE CABLES FOR AN OPEN

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

  • Ignition OFF.
  • Depower the High Voltage Battery system.
    REFER to: High Voltage System De-energizing (414-03 High Voltage Battery, Mounting and Cables, General Procedures).
  • Disconnect High Voltage Battery Junction Box C1815E .
  • Disconnect ACCM C1803B .
  • Disconnect Cabin coolant heater C1815A .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1803B-B   C1815A-1
      C1803B-A   C1815A-4

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815E-4   C1815A-3
      C1815E-2   C1815A-2

Are the resistances less than 3 ohms?
Yes GO to AJ5
No INSTALL new (14B322) or (14B323) high voltage cables as needed.

AJ5 CHECK THE CABIN COOLANT HEATER HIGH VOLTAGE LOW CURRENT FUSE

  WARNING: Never install the service disconnect plug when a high-voltage service cover is removed. Always install the cover prior to connecting the service disconnect plug. The cover prevents inadvertent contact with the high voltage which is present at several points under the cover. Failure to follow these instructions may result in serious personal injury or death.

  • Remove the High Voltage Battery.
    REFER to: High Voltage Battery - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation).
  • Remove the High Voltage Battery enclosure.
    REFER to: High Voltage Low Current Fuse - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation).
  • Measure the resistance of the high voltage low current fuse.

Is the resistance less than 3 ohms?
Yes GO to AJ12
No INSTALL a new (50A) high voltage low current fuse.
REFER to: High Voltage Low Current Fuse - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation).

AJ6 CHECK THE CABIN COOLANT HEATER LOW VOLTAGE CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC fuse 97 (10A).
  • Disconnect Cabin coolant heater C1815B .
  • Disconnect ACCM C1803A .
  • Disconnect SOBDMC C1458A .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-3   Ground
      C1815B-2   Ground

Is there any voltage present?
Yes REPAIR the circuit in question.
No GO to AJ7

AJ7 CHECK THE CABIN COOLANT HEATER LOW VOLTAGE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-3   Ground
      C1815B-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AJ8
No REPAIR the circuit in question.

AJ8 CHECK THE CABIN COOLANT HEATER LOW VOLTAGE CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-3 BCMC fuse 97 (10A) cavity, component side

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-2   C1458A-H1

    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-1   Ground

Are the resistances less than 3 ohms?
Yes GO to AJ9
No REPAIR the circuit in question.

AJ9 CHECK THE CABIN COOLANT HEATER LOW VOLTAGE CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1815B-1   C1815B-2
      C1815B-1   C1815B-3
      C1815B-2   C1815B-3

Are the resistances greater than 10,000 ohms?
Yes GO to AJ10
No REPAIR the circuits in question.

AJ10 CHECK THE COOLANT HOSE ROUTING

NOTE: Routing of the coolant hoses is critical to proper Cabin Coolant Heater System operation.

  • Ignition OFF.
  • Check the cabin coolant heater system hose routing. Pay close attention to the diverter valve hose routing and the top and bottom ports of the bulkhead. View the system diagrams,
    REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

Are the coolant hoses routed correctly?
Yes GO to AJ11
No CORRECT the coolant hose routing.
REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

AJ11 CHECK THE ENGINE COOLANT LEVEL

NOTE: Allow the engine to cool before checking the engine coolant level.

  • Visually inspect the engine coolant level at the degas bottle.

Is the engine coolant level within specifications?
Yes GO to AJ12
No Refer to the appropriate procedure in Group 303-03.

AJ12 CLEAR ALL SOBDMC (SECONDARY ON-BOARD DIAGNOSTIC CONTROL MODULE C) DIAGNOSTIC TROUBLE CODES

NOTE: Before an active command of the Cabin Heater Coolant Pump, the Cabin Coolant Heater or the Cabin Heater Coolant Diverter Valve can be performed, the vehicle must be in Ready to Drive mode. Switch the ignition on with transmission selector lever in position P. Look for the green ready indicator light to appear in the lower right portion of the instrument cluster and a ready to drive message to appear in the middle of the left cluster screen.

  • Reconnect all disconnected connectors. Make sure they seat and latch correctly.
  • Place vehicle in Ready to Drive mode.
  • Press the EV button (center console) & select EV Now.
  • Set the HVAC controls to Auto and set the temperature to 80°F.
  • Using a diagnostic scan tool, CLEAR all SOBDMC Diagnostic Trouble Codes (DTCs).
  • Access the  SOBDMC  and control the  HTRCABIN_PWM (%)  PID

  • Touch the heater core hoses.

Do the heater core hoses increase in temperature?
Yes If the cabin coolant heater operates normally, the system is operating correctly at this time. The concern may have been caused by cabin coolant heater connections. ADDRESS the root cause of any connector or pin issues.
No INSTALL a new cabin coolant heater. REFER to the appropriate procedure in Group 412-03. RE-CHECK the cabin coolant heater system hose routing. Pay close attention to the hose routing to the diverter valve. View the system diagrams,
REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).
TEST the system for normal operation. (To test the cabin coolant heater system for normal operation, place the vehicle in Ready to Drive mode, make sure EV Now is selected and the Heating, Ventilation, and Air Conditioning (HVAC) control is set to Auto and the cabin temperature is set to 80°F. Run the system for 5 minutes and feel the air temperature at the air discharge registers or vents.)

PINPOINT TEST AK : U0100:00

Normal Operation and Fault Conditions

The ACCM and the HVAC control module communicates with the PCM over the CAN. If messages are missing or not received from the PCM, features such as the A/C can be inoperative or can operate incorrectly, or the outside air temperature can be reporting incorrectly.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information Sets in continuous memory when the ACCM detects network messages are missing from the PCM for more than 5 seconds.
HVAC U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information Sets in continuous memory when the HVAC control module detects network messages are missing from the PCM for more than 5 seconds.

Possible Sources

  • Network communication concern
  • ACCM concern
  • HVAC control module concern
  • PCM concern
AK1 VERIFY THE CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to AK2
No The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AK2 VERIFY THE DIAGNOSTIC SCAN TOOL COMMUNICATES WITH THE PCM (POWERTRAIN CONTROL MODULE)
  • Connect the diagnostic tool.
  • Attempt to establish a vehicle session using the diagnostic scan tool.

Can a vehicle session be established?
Yes GO to AK3
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

AK3 CHECK FOR NON-NETWORK DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the self-test for the ACCM setting the DTC.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs) first. REFER to the appropriate DTC Chart in this section.
No GO to AK4

AK4 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the PCM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes REFER to the Diagnosis and Testing in the appropriate 303-14 section.
No GO to AK5

AK5 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:00
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module setting the DTC ( ACCM or HVAC control module).
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the module setting the DTC ( ACCM or HVAC control module).

Is DTC U0100:00 still present?
Yes GO to AK6
No The system is operating correctly at this time. The DTC may have set due to high network traffic or an intermittent fault condition.

AK6 CHECK FOR OTHER CAUSES OF NETWORK COMMUNICATION CONCERN

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration can be incorrectly set during the Programmable Module Installation (PMI) or Programmable Module Installation (PMI) the may not have been carried out.

  • Check the vehicle service history for recent service actions related to the PCM and the module setting the DTC ( ACCM or HVAC control module). If recent service history is found:
    • verify correct replacement module was installed
      • vehicle parts build list may be used to verify correct part fitment
    • verify the configuration of replacement module was correct
      • re-configure module using as-built data if prior configuration is suspect
    • verify the module was not obtained from a like vehicle and installed into vehicle with concern
      • return the swapped module to source vehicle and obtain new replacement module
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to AK7
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

AK7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all the PCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals pins
    • pushed-out pins - install new pins as necessary
  • Reconnect the PCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AL : U0111:00

Normal Operation and Fault Conditions

The ACCM communicates with the BECM over the CAN. If messages are missing or not received from the BECM, the A/C can be inoperative.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM U0111:00 Lost Communication With Battery Energy Control Module "A": No Sub Type Information Sets in continuous memory when the ACCM detects network messages are missing from the BECM for more than 5 seconds.

Possible Sources

  • Network communication concern
  • ACCM concern
  • BECM concern
AL1 VERIFY THE CONCERN
  • Ignition ON.
  • Verify there is an observable symptom present.

Is an observable symptom present?
Yes GO to AL2
No The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AL2 CHECK THE NETWORK COMMUNICATION
  • Using a diagnostic scan tool, carry out the network test.

Does the BECM pass the network test?
Yes GO to AL3
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

AL3 CHECK FOR NON-NETWORK DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the self-test for the ACCM setting the DTC.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs) first. REFER to the appropriate DTC Chart in this section.
No GO to AL4

AL4 CHECK FOR BECM (BATTERY ENERGY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the BECM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: High Voltage Battery, Mounting and Cables (414-03 High Voltage Battery, Mounting and Cables, Diagnosis and Testing).
No GO to AL5

AL5 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0111:00
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question setting the DTC.
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the module in question setting the DTC.

Is DTC U0111:00 still present?
Yes GO to AL6
No The system is operating correctly at this time. The DTC may have set due to high network traffic or an intermittent fault condition.

AL6 CHECK FOR OTHER CAUSES OF NETWORK COMMUNICATION CONCERN

NOTE: If new modules were installed prior to the Diagnostic Trouble Code (DTC) being set, the module configuration can be incorrectly set during the Programmable Module Installation (PMI) or Programmable Module Installation (PMI) the may not have been carried out.

  • Check the vehicle service history for recent service actions related to the BECM and the ACCM setting the DTC. If recent service history is found:
    • verify correct replacement module was installed
      • vehicle parts build list may be used to verify correct part fitment
    • verify the configuration of replacement module was correct
      • re-configure module using as-built data if prior configuration is suspect
    • verify the module was not obtained from a like vehicle and installed into vehicle with concern
      • return the swapped module to source vehicle and obtain new replacement module
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to AL7
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

AL7 CHECK FOR CORRECT BECM (BATTERY ENERGY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all the BECM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals pins
    • pushed-out pins - install new pins as necessary
  • Reconnect the BECM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BECM.
REFER to: Battery Energy Control Module (BECM) - Hybrid Electric Vehicle (HEV) (414-03 High Voltage Battery, Mounting and Cables, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AM : U3003:16

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

The modules monitor the supplied voltage and set a DTC if it falls below a threshold.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold HVAC control module senses lower than expected system voltage.
RHVAC U3003:16 Battery Voltage: Circuit Voltage Below Threshold RHVAC control module senses lower than expected system voltage.

Possible Sources

  • Wiring, terminals or connectors
  • Charging system concern
  • Low battery
  • HVAC control module
  • RHVAC control module
AM1 RECHECK FOR LOW VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question setting the low voltage DTC.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the module in question setting the low voltage DTC.

Is DTC U3003:16 still present?
Yes GO to AM2
No The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.

AM2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the PCM KOEO and KOER self-tests.

Are any voltage-related Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE the charging system concern. REFER to the appropriate Diagnosis and Testing in section 414-00.
No GO to AM3

AM3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
  • Ignition OFF.
  • Check the battery condition and verify the battery is fully charged.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery OK and fully charged?
Yes GO to AM4
No DIAGNOSE the battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

AM4 COMPARE THE SUSPECT MODULE VOLTAGE SUPPLY PID (PARAMETER IDENTIFICATION) TO THE BATTERY VOLTAGE
  • Ignition ON.
  • Measure and record the battery voltage.
  • For the suspect module, monitor the voltage supply PID:
    • Access the  HVAC  and monitor the  VPWR (V)  PID

    • Access the  RHVAC  and monitor the  VPWR (V)  PID


Is the voltage reading within 0.2 volt of the recorded battery voltage?
Yes For the HVAC control module, GO to AM7
For the RHVAC control module, GO to AM8
No GO to AM5

AM5 CHECK THE MODULE VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

  • Ignition OFF.
  • Disconnect the suspect module.
  • Ignition ON.
  • Measure and record the battery voltage.
  • For the suspect module, measure:
    Click to display connectors

      HVAC control module


    Positive Lead Measurement / Action Negative Lead
      C228A-26   Ground

    Click to display connectors

      RHVAC control module


    Positive Lead Measurement / Action Negative Lead
      C3198-6   Ground

Is the voltage reading within 0.2 volt of the recorded battery voltage?
Yes GO to AM6
No REPAIR the circuit for high resistance.

AM6 CHECK THE SUSPECT MODULE GROUND CIRCUIT FOR HIGH RESISTANCE
  • For the suspect module, measure:
    Click to display connectors

      HVAC control module


    Positive Lead Measurement / Action Negative Lead
      C228A-26   C228A-1

    Click to display connectors

      RHVAC control module


    Positive Lead Measurement / Action Negative Lead
      C3198-6   C3198-5

Is the voltage reading within 0.2 volt of the recorded battery voltage?
Yes For the HVAC control module, GO to AM7
For the RHVAC control module, GO to AM8
No REPAIR the circuit for high resistance.

AM7 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AM8 CHECK FOR CORRECT RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RHVAC control module electrical connector.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect the RHVAC control module electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSMS or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RHVAC control module. REFER to the appropriate procedure in Group 412-02.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AN : U3003:17

Normal Operation and Fault Conditions

The modules monitor the supplied voltage and set a DTC if it rises above a threshold.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold Sets in continuous memory and during the on-demand self-test when the HVAC control module detects the supply voltage is greater than 16 volts. This DTC may also set in the HVAC control module due to battery charging or vehicle jump starting events.
RHVAC U3003:17 Battery Voltage: Circuit Voltage Above Threshold Sets in continuous memory and during the on-demand self-test when the RHVAC control module detects the supply voltage is greater than 16 volts. This DTC may also set in the RHVAC control module due to battery charging or vehicle jump starting events.

Possible Sources

  • Charging system concern
  • HVAC control module
  • RHVAC control module
NOTE: Diagnostic Trouble Code (DTC) U3003:17 may be stored in the module memory due to past battery charging or vehicle jump starting events.
AN1 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
  • Ignition ON.
  • Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Are any charging or over-voltage related voltage Diagnostic Trouble Codes (DTCs) present in multiple modules?
Yes DIAGNOSE the overcharging condition. REFER to the appropriate Diagnosis and Testing in section 414-00.
No GO to AN2

AN2 CHECK THE BATTERY VOLTAGE WITH THE ENGINE RUNNING
  • Turn off all interior/exterior lights and accessories.
  • Start and run the engine at approximately 2,000 RPM for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to 15.5 volts or higher?
Yes DIAGNOSE the overcharging condition. REFER to the appropriate Diagnosis and Testing in section 414-00.
No GO to AN3

AN3 RECHECK FOR THE HIGH VOLTAGE DTC (DIAGNOSTIC TROUBLE CODE)
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, clear the DTC for the suspect module.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the suspect module setting the high voltage DTC.

Is DTC U3003:17 still present?
Yes For the HVAC control module, GO to AN4
For the RHVAC control module, GO to AN5
No The system is operating correctly at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

AN4 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect all HVAC control module electrical connectors.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

AN5 CHECK FOR CORRECT RHVAC (REAR HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RHVAC control module electrical connector.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect the RHVAC control module electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RHVAC control module. REFER to the appropriate procedure in Group 412-02.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AO : BUS OFF

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM U0001:88 High Speed CAN Communication Bus: Bus Off The module could not communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this DTC.

Possible Sources

  • Intermittent fault with the CAN
AO1 DIAGNOSE THE INTERMITTENT FAULT

NOTE: The module was unable to communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this Diagnostic Trouble Code (DTC).

  • Ignition ON.
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question.
  • Wait at least 10 seconds.
  • Using a diagnostic scan tool, carry out the self-test for the module in question.
  • Verify the integrity of the connectors and wiring for the CAN.

Is the DTC still present?
Yes DIAGNOSE the CAN in question.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No The system is operating correctly at this time. VERIFY the integrity of the connectors and wiring for the CAN in question.

PINPOINT TEST AP : INVALID DATA RECEIVED

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information Sets when the HVAC control module receives invalid network data from the PCM.
HVAC U0401:82 Invalid Data Received from ECM/PCM A: Alive/Sequence Counter Incorrect/Not Updated Sets when the HVAC control module receives invalid network data from the PCM.
HVAC U0422:68 Invalid Data Received From Body Control Module: Event Information Sets when the HVAC control module receives invalid network data from the BCM.
HVAC U0422:81 Invalid Data Received From Body Control Module: Invalid Serial Data Received Sets when the HVAC control module receives invalid network data from the BCM.
HVAC U0452:82 Invalid Data Received From Restraints Control Module: Alive/Sequence Counter Incorrect/Not Updated Sets when the HVAC control module receives invalid network data from the RCM.
HVAC U0466:68 Invalid Data Received From HVAC Control Module- Rear: Event Information Sets when the HVAC control module receives invalid network data from the RHVAC.

Possible Sources

  • Suspect module
AP1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE MODULE SENDING INVALID DATA
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the self-test for the module in question sending the invalid data.

Are any Diagnostic Trouble Codes (DTCs) present from the module sending the invalid data?
Yes DIAGNOSE the module sending the invalid data. REFER to the appropriate section in the Workshop Manual.
No DIAGNOSE the observable symptom present. REFER to the appropriate Symptom chart in this section.

PINPOINT TEST AQ : MODULE CONFIGURATION FAULT

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
HVAC U2024:51 Control Module Cal-Config Data: Not Programmed This DTC sets due to incomplete or improper PMI procedures.
HVAC U2100:00 Initial Configuration Not Complete: No Sub Type Information This DTC sets due to incomplete or improper PMI procedures.

Possible Sources

  • Incomplete or incorrect PMI
AQ1 CARRY OUT THE PMI (PROGRAMMABLE MODULE INSTALLATION) FOR THE SUSPECT MODULE
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the PMI procedure for the suspect module as directed by the diagnostic scan tool.
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the suspect module.
  • Using a diagnostic scan tool, carry out the self-test for the suspect module.

Is the original DTC still present?
Yes For all other modules, INSTALL a new module in question. REFER to the appropriate Removal and Installation procedure in this section.
No The repair is complete.

PINPOINT TEST AR : INTERNAL MODULE FAILURE

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ACCM B11EE:41 A/C Compressor: General Checksum Failure Sets when the ACCM detects an internal fault.
ACCM U3000:04 Control Module: System Internal Failures Sets when the ACCM detects an internal fault.
ACCM U3000:42 Control Module: General Memory Failure Sets when the ACCM detects an internal fault.
ACCM U3000:49 Control Module: Internal Electronic Failure Sets when the ACCM detects an internal fault.
HVAC U3000:41 Control Module: General Checksum Failure Sets when the HVAC control module detects an internal fault.
HVAC U3000:49 Control Module: Internal Electronic Failure Sets when the HVAC control module detects an internal fault.
RHVAC U3000:41 Control Module: General Checksum Failure Sets when the RHVAC detects an internal fault.
RHVAC U3000:42 Control Module: General Memory Failure Sets when the RHVAC detects an internal fault.

Possible Sources

  • Suspect module
AR1 INSTALL A NEW SUSPECT MODULE
  • Ignition OFF.
  • INSTALL a new module in question. REFER to the appropriate Removal and Installation procedure in Group 412.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS and follow the instructions for the applicable TSB, GSB, SSM or FSA.
No The repair is complete.

PINPOINT TEST AS : P2611:00, P2612:00, P2613:00 BATTERY CHILLER SHUT OFF VALVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Battery chiller shut off valve REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

To validate repairs have been completed, using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs) and carry out a self-test of the SOBDMC. The SOBDMC self-test requests the climate control valve to actuate.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information Test fails when BCMC reports an open circuit on the battery chiller shutoff valve control line
BCMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information Test fails when BCMC reports a short to ground on the battery chiller shutoff valve control circuit
BCMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information Test fails when BCMC reports a short to power on the battery chiller shutoff valve control circuit
SOBDMC P2611:00 A/C Refrigerant Distribution Valve "A" Control Circuit/Open: No Sub Type Information Test fails when BCMC reports an open circuit on the battery chiller shutoff valve control line
SOBDMC P2612:00 A/C Refrigerant Distribution Valve "A" Control Circuit Low: No Sub Type Information Test fails when BCMC reports a short to ground on the battery chiller shutoff valve control circuit
SOBDMC P2613:00 A/C Refrigerant Distribution Valve "A" Control Circuit High: No Sub Type Information Test fails when BCMC reports a short to power on the battery chiller shutoff valve control circuit

Possible Sources

  • Wiring, terminals or connectors
  • Battery chiller shutoff valve
  • BCMC
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AS1 CHECK THE BATTERY CHILLER SHUT OFF VALVE CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC C1035B .
  • Disconnect Battery chiller shutoff valve C1980 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1980-1   Ground

Is any voltage present?
Yes REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.
No GO to AS2

AS2 CHECK THE BATTERY CHILLER SHUT OFF VALVE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1980-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AS3
No REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AS3 CHECK THE BATTERY CHILLER SHUT OFF VALVE CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1980-1   C1035B-28
      C1980-2   Ground

Are the resistances less than 3 ohms?
Yes GO to AS4
No REPAIR the affected circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AS4 CHECK THE BATTERY CHILLER SHUT OFF VALVE CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1980-1   C1980-2

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new high voltage battery coolant cooler.
REFER to: High Voltage Battery Coolant Cooler (412-03 Supplemental Climate Control, Removal and Installation).
CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC. TEST the system for normal operation. If the concern is still present, GO to AS5
No REPAIR the circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AS5 CHECK FOR CORRECT BCMC (BODY CONTROL MODULE C) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCMC electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all BCMC electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCMC.
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AT : P2E62:00, P2E63:00, P2E64:00 REAR HEATER CORE SHUT OFF VALVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Rear heater core shutoff valve REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

To validate repairs have been completed, using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs) and carry out a self-test of the SOBDMC. The SOBDMC self-test requests the climate control valve to actuate.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information BCMC reports an open circuit in the rear heater core shutoff valve control circuit. Rear climate zone may continuously get warm air.
BCMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information BCMC reports a short to ground in the rear heater core shutoff valve control circuit
BCMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information BCMC reports a short to power in the rear heater core shutoff valve control circuit.
SOBDMC P2E62:00 Engine Coolant Bypass Valve "E" Control Circuit/Open: No Sub Type Information BCMC reports an open circuit in the rear heater core shutoff valve control circuit. Rear heater core shutoff valve is reported as failed closed to the SOBDMC.
SOBDMC P2E63:00 Engine Coolant Bypass Valve "E" Control Circuit Low: No Sub Type Information BCMC reports a short to ground in the rear heater core shutoff valve control circuit. Rear heater core shutoff valve is reported as failed closed to the SOBDMC.
SOBDMC P2E64:00 Engine Coolant Bypass Valve "E" Control Circuit High: No Sub Type Information BCMC reports a short to power in the rear heater core shutoff valve control circuit. Rear heater core shutoff valve is reported as failed closed to the SOBDMC.

Possible Sources

  • Wiring, terminals or connectors
  • Rear heater core shutoff valve
  • BCMC
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AT1 CHECK THE REAR HEATER CORE SHUT OFF VALVE CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC C1035C .
  • Disconnect Rear heater core shutoff valve C429 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   Ground

Is any voltage present?
Yes REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.
No GO to AT2

AT2 CHECK THE REAR HEATER CORE SHUT OFF VALVE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AT3
No REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AT3 CHECK THE REAR HEATER CORE SHUT OFF VALVE CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   C1035C-27
      C467-2   Ground

Are the resistances less than 3 ohms?
Yes GO to AT4
No REPAIR the affected circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AT4 CHECK THE REAR HEATER CORE SHUT OFF VALVE CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   C467-2

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new rear heater core shutoff valve. REFER to the appropriate procedure in Group 412-03. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC. TEST the system for normal operation. If the concern is still present, GO to AT5
No REPAIR the circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AT5 CHECK FOR CORRECT BCMC (BODY CONTROL MODULE C) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCMC electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all BCMC electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCMC.
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AU : B3A01:00, B3A02:00, B3A03:00 REAR EVAPORATOR SHUTOFF VALVE

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Rear evaporator shutoff valve REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

To validate repairs have been completed, using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs) and carry out a self-test of the SOBDMC. The SOBDMC self-test requests the climate control valve to actuate.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCMC B3A01:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit/Open: No Sub Type Information Test fails when BCMC reports an open circuit in the rear evaporator shutoff valve control circuit.
BCMC B3A02:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit Low: No Sub Type Information Test fails when BCMC reports a a short to ground in the rear evaporator shutoff valve control circuit.
BCMC B3A03:00 A/C Refrigerant Distribution Valve Actuator "C" Control Circuit High: No Sub Type Information Test fails when BCMC reports a short to power in the rear evaporator shutoff valve control circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Rear evaporator shutoff valve
  • BCMC
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AU1 CHECK THE REAR EVAPORATOR SHUTOFF VALVE CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC C1035C .
  • Disconnect Rear evaporator shutoff valve C467 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   Ground

Is any voltage present?
Yes REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.
No GO to AU2

AU2 CHECK THE REAR EVAPORATOR SHUTOFF VALVE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AU3
No REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AU3 CHECK THE REAR EVAPORATOR SHUTOFF VALVE CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   C1035C-27
      C467-2   Ground

Are the resistances less than 3 ohms?
Yes GO to AU4
No REPAIR the affected circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AU4 CHECK THE REAR EVAPORATOR SHUTOFF VALVE CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C467-1   C467-2

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new rear evaporator shutoff valve.
REFER to: Rear Evaporator Shutoff Valve (412-03 Supplemental Climate Control, Removal and Installation).
CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC. TEST the system for normal operation. If the concern is still present, GO to AU5
No REPAIR the circuits. CLEAR all Diagnostic Trouble Codes (DTCs) and CARRY OUT the self-test of the SOBDMC.

AU5 CHECK FOR CORRECT BCMC (BODY CONTROL MODULE C) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all BCMC electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all BCMC electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCMC.
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AV : P2183, P2184, P2185, P2186

Refer to Wiring Diagrams Cell 55 for schematic and connector information.

Normal Operation and Fault Conditions

Cabin heater coolant temperature sensor (also known as ECT sensor 2), REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P2183:00 Engine Coolant Temperature Sensor 2 Circuit Range/Performance: No Sub Type Information This DTC sets when the PCM senses voltage out of range on the ECT sensor 2 circuit.
PCM P2184:00 Engine Coolant Temperature Sensor 2 Circuit Low: No Sub Type Information This DTC sets when the PCM senses low voltage on the ECT sensor 2 circuit, indicating a short to ground.
PCM P2185:00 Engine Coolant Temperature Sensor 2 Circuit High: No Sub Type Information This DTC sets when the PCM senses high voltage on the ECT sensor 2 circuit, indicating a short to voltage.
PCM P2186:00 Engine Coolant Temperature Sensor 2 Circuit Intermittent/Erratic: No Sub Type Information This DTC sets when the PCM senses erratic voltage on the ECT sensor 2 circuit, indicating an intermittent connection or a short to ground or voltage.

Possible Sources

  • Wiring, terminals or connectors
  • Cabin heater coolant temperature sensor (also known as ECT sensor 2)
  • PCM
  WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Before performing this pinpoint test, ensure the high voltage battery is at least 50 % charged. For charging information, refer to section 414-03.
AV1 CHECK THE COOLANT HOSE ROUTING

NOTE: Routing of the coolant hoses is critical to proper Cabin Coolant Heater System operation.

  • Ignition OFF.
  • Check the cabin coolant heater system hose routing. Pay close attention to the diverter valve hose routing and the top and bottom ports of the bulkhead. View the system diagrams,
    REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

Are the coolant hoses routed correctly?
Yes CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules. TEST system for normal operation. ( To test the cabin coolant heater system for normal operation, place the vehicle in Ready to Drive mode, make sure EV Now is selected and the Heating, Ventilation, and Air Conditioning (HVAC) control is set to Auto and the cabin temperature is set to 80°F. Run the system for 5 minutes and feel the air temperature at the air discharge registers or vents.) If the concern is still present, GO to AV2
No CORRECT the coolant hose routing.
REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

AV2 CHECK THE ECT (ENGINE COOLANT TEMPERATURE) SENSOR 2 CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PCM C1551B .
  • Disconnect ECT Sensor 2 C1064 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1064-1   Ground
      C1064-2   Ground

Is there any voltage present?
Yes REPAIR the circuit in question.
No GO to AV3

AV3 CHECK THE ECT (ENGINE COOLANT TEMPERATURE) SENSOR 2 CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1064-1   Ground
      C1064-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to AV4
No REPAIR the circuit in question.

AV4 CHECK THE ECT (ENGINE COOLANT TEMPERATURE) SENSOR 2 CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1064-1   C1551B-25
      C1064-2   C1551B-28

Are the resistances less than 3 ohms?
Yes GO to AV5
No REPAIR the circuit in question.

AV5 CHECK THE ECT (ENGINE COOLANT TEMPERATURE) SENSOR 2 CIRCUITS FOR A SHORT TOGETHER
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1064-1   C1064-2

Is the resistance greater than 10,000 ohms?
Yes GO to AV6
No REPAIR the circuits.

AV6 CHECK THE ECT (ENGINE COOLANT TEMPERATURE) SENSOR 2 RESISTANCE
  • Measure:
    Positive Lead Measurement / Action Negative Lead
    C1064 pin 1, component side C1064 pin 2, component side
  • •Compare the ECT sensor 2 measured resistance with the table below.
    Temperature Resistance (K ohms)
    130°C (266°F) 0.86 - 0.97
    120°C (248°F) 1.13 - 1.25
    110°C (230°F) 1.48 - 1.64
    100°C (212°F) 1.97 - 2.18
    90°C (194°F) 2.66 - 2.95
    80°C (176°F) 3.64 - 4.03
    70°C (158°F) 5.07 - 5.60
    60°C (140°F) 7.17 - 7.93
    50°C (122°F) 10.37 - 11.47
    40°C (104°F) 15.30 - 16.92
    30°C (86°F) 23.04 - 25.47
    20°C (68°F) 35.47 - 39.21
    10°C (50°F) 56.03 - 61.94
    0°C (32°F) 91.05 - 100.64
    -10°C (14°F) 152.29 - 168.33

Is the resistance within the specified values for the temperatures?
Yes GO to AV7
No INSTALL a new ECT sensor 2. REFER to the appropriate procedure in Group 412-03. TEST the system for normal operation. (To test the cabin coolant heater system for normal operation, place the vehicle in Ready to Drive mode, make sure EV Now is selected and the Heating, Ventilation, and Air Conditioning (HVAC) control is set to Auto and the cabin temperature is set to 80°F. Run the system for 5 minutes and feel the air temperature at the air discharge registers or vents.) If the concern is still present, GO to AV7

AV7 CHECK FOR CORRECT POWERTRAIN CONTROL MODULE (PCM) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PCM connectors.
  • Repair:
    • corrosion (replace connector or terminals – clean module pins)
    • damaged or bent pins – replace terminals/pins
    • pushed-out pins – replace pins as necessary
  • Reconnect the PCM connectors. Make sure they seat and latch correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AW : THE A/C (AIR CONDITIONING) COMPRESSOR RELIEF VALVE DISCHARGING

Normal Operation and Fault Conditions

The A/C pressure relief valve normal open pressure is 3,447-4,137 kPa (500-600 psi).

Possible Sources

  • High system pressure
  • A/C pressure relief valve
AW1 DIAGNOSE THE A/C (AIR CONDITIONING) COMPRESSOR RELIEF VALVE
  • Start the engine.
  • On the HVAC controls, set the temperature to full cold, select PANEL and select the A/C button (indicator on).
  • Using the appropriate manifold gauge set, check the A/C high side system pressure.

Is the high side system pressure above the A/C pressure relief valve open pressure [3,447-4,137 kPa (500-600 psi)]?
Yes REPAIR the A/C system for a restriction. REFER to the appropriate Refrigerant System Tests general procedure in Group 412-00.
No INSTALL a new A/C compressor. REFER to the appropriate procedure in Group 412-00.

PINPOINT TEST AX : P26BE, P26BF CABIN HEATER COOLANT DIVERTER VALVE

Refer to Wiring Diagrams Cell 23 for schematic and connector information.

Normal Operation and Fault Conditions

Cabin heater coolant diverter valve REFER to: Supplemental Climate Control - System Operation and Component Description (412-03 Supplemental Climate Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P26BE:00 Engine Coolant Bypass Valve "D" Control Circuit Low: No Sub Type Information Test fails when BCMC reports an open circuit in the rear evaporator shutoff valve control circuit.
PCM P26BF:00 Engine Coolant Bypass Valve "D" Control Circuit High: No Sub Type Information Test fails when BCMC reports a a short to ground in the rear evaporator shutoff valve control circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Cabin heater coolant diverter valve
  • PCM
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AX1 CHECK THE CABIN HEATER COOLANT DIVERTER VALVE CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCMC fuse 14 (15A).
  • Disconnect Cabin heater coolant diverter valve C1913 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1913-3   Ground
      C1913-4   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to AX2

AX2 CHECK THE CABIN HEATER COOLANT DIVERTER VALVE CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1913-3   Ground
      C1913-4   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AX3
No REPAIR the circuit.

AX3 CHECK THE CABIN HEATER COOLANT DIVERTER VALVE CIRCUITS FOR AN OPEN
  • Disconnect BCMC C1035B .
  • Disconnect PCM C1551T .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1913-1   Ground
      C1913-3   C1551T-73
      C1913-4   C1035B-44

Are the resistances less than 3 ohms?
Yes INSTALL a new cabin heater coolant diverter valve.
REFER to: Cabin Heater Coolant Diverter Valve (412-03 Supplemental Climate Control, Removal and Installation).
TEST the system for normal operation. If the concern is still present, GO to AX4
No REPAIR the affected circuits.

AX4 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM electrical connectors (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect all PCM electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   Click here to access Guided Routine (PCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST AY : INSUFFICIENT AIR CONDITIONING (A/C) COOLING

Possible Sources

  • Improper A/C system refrigerant charge
  • Temperature door actuator
AY1 CHECK THE AIR CONDITIONING (A/C) SYSTEM FOR PROPER CHARGE

NOTE: Proper Air Conditioning (A/C) system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21.1°C (70°F).

  • PERFORM the refrigerant system tests. REFER to the appropriate general procedure in Group 412-00.

Did the system pass the refrigerant system tests?
Yes DIAGNOSE for a temperature door actuator not operating correctly. GO to Pinpoint Test G GO to Pinpoint Test H
No REPAIR the concern found in the refrigerant system tests chart.

PINPOINT TEST AZ : REDUCED OUTLET AIRFLOW

Possible Sources

  • Plugged cabin air filter
  • Improper A/C system refrigerant charge
  • Blower motor
NOTE: Before carrying out the following test, diagnose all Heating, Ventilation And Air Conditioning (HVAC) control module and Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs).
AZ1 CHECK THE CABIN AIR FILTER
  • Ignition OFF.
  • Inspect the cabin air filter for possibly plugged or wet. Refer to the appropriate procedure in Group 412-00.

Is the cabin air filter plugged?
Yes REPLACE or REPAIR as needed.
No GO to AZ2

AZ2 CHECK THE BLOWER MOTOR OPERATION
  • Ignition ON.
  • Using the HVAC controls, select panel mode, set temperature to mid range.
  • Operate the blower motor through all speeds.
  • Turn off the blower motor.

Does the blower motor operate properly?
Yes GO to AZ3
No DIAGNOSE the blower motor concern. GO to Pinpoint Test P

AZ3 CHECK THE AIR CONDITIONING (A/C) SYSTEM FOR PROPER CHARGE

NOTE: Proper Air Conditioning (A/C) system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21.1°C (70°F).

  • PERFORM the refrigerant system tests. REFER to the appropriate general procedure in Group 412-00.

Did the system pass the refrigerant system tests?
Yes The system is operating correctly at this time.
No REPAIR the concern found in the refrigerant system tests chart.

PINPOINT TEST BA : A/C (AIR CONDITIONING) SYSTEM NVH (NOISE, VIBRATION AND HARSHNESS)

NOTE: Proper Air Conditioning (A/C) system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21.1°C (70°F).

Normal Operation and Fault Conditions

INSPECT the A/C system for a leak. REFER to the appropriate General Procedures in Group 412-00.

Some sounds are normal when the A/C system is operating. When the refrigerant charge is found to be correct, compare to a like vehicle.

Possible Sources

  • Low refrigerant charge
  • A/C compressor clutch air gap out of specification
  • A/C compressor pulley bearing worn
  • A/C compressor bearing worn
  • A/C lines or hoses in contact with frame or other components
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

    Description and Operation - Climate Control System - System Operation and Component Description

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    Other information:

    Ford Explorer 2020-2022 Service Manual: Removal and Installation - Timing Chain Tensioner


    Removal NOTICE: Do not loosen or remove the crankshaft pulley bolt without first installing the special tools as instructed in this procedure. The crankshaft pulley and the crankshaft timing sprocket are not keyed to the crankshaft. The crankshaft, the crankshaft sprocket and the pulley are fitted together by friction...

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    Removal Raise the front seat to its highest point of travel. Remove the front seat cushion blower motor. Disconnect the electrical connector. Rotate the blower motor 45 degrees clockwise. Installation To install, reverse the removal procedure...

    Categories

    Gauges

    4 Inch Display

    A - Tachometer.

    B - Information display.

    C - Speedometer.

    D - Fuel gauge.

    E - Engine coolant temperature gauge.

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