Ford Explorer: Fuel System - General Information - 2.3L EcoBoost (201kW/273PS) / Diagnosis and Testing - Fuel System - 2.3L EcoBoost (201kW/273PS)
Symptom Chart(s)
Symptom Chart: Fuel System
NOTE:
The fuel tank inlet check valve prevents spitback of fuel during and after refueling.
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).
for information regarding Ford-specific diagnostic practices.
NOTE:
The following procedure diagnoses a slow to fill concern
only. For all other concerns, refer to Refer to Powertrain
Control/Emissions Diagnosis (PC/ED) manual.
Symptom Chart
Condition
|
Possible Sources
|
Actions
|
Slow to fill
|
-
Fuel tank filler pipe
-
Fuel tank filler pipe vent tube, if equipped
-
Evaporative emission system
-
Fuel tank inlet check valve (part of the fuel tank)
-
Fuel level vent valve (part of the fuel tank)
|
GO to Pinpoint Test A
|
All other fuel system concerns
|
Fuel system components
|
Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.
|
Diagnostic Routine(s)
PINPOINT TEST A : SLOW TO FILL
Normal Operation and Fault Conditions
Under normal operation, fuel should flow at a
steady rate through the fuel tank filler pipe into the fuel tank. As
fuel enters the fuel tank air is vented through the filler pipe or the
ORVR system.
Possible Sources
- Fuel tank filler pipe
- Fuel tank filler pipe vent tube, if equipped
- Evaporative emission system
- Fuel tank inlet check valve (part of the fuel tank)
- Fuel level vent valve (part of the fuel tank)
|
A1 CHECK THE FUEL SYSTEM COMPONENTS FOR SIGNS OF DAMAGE |
-
Visually inspect the following components for signs of damage:
-
Fuel tank filler pipe
-
Fuel tank filler pipe vent tube, if equipped
-
EVAP system
-
Fuel tank inlet check valve (part of the fuel tank)
-
Fuel level vent valve (part of the fuel tank)
-
EVAP canister (may be saturated with liquid)
Are any of the components damaged?
Yes |
REPAIR or INSTALL new components to correct the concern.
|
|
A2 CHECK THE SYSTEM FOR ANY EVAP (EVAPORATIVE EMISSION)
DTC'S |
-
Using a diagnostic scan tool, perform the PCM self-test.
-
Check the PCM for any of the EVAP DTCs: P00FE, P04F0, P0455, P0446, P0451, and P0496, P2450, P2418.
Are any of these DTC's present?
Yes |
Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.
|
|
A3 MONITOR THE FTP WHILE FILLING THE FUEL TANK |
-
Monitor the Fuel Tank Pressure (FTP) for typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 1" H2O / 0.25 kPa?
No |
Is the FTP less than 12" H2O / 3.0 kPa?
Yes :
GO to A5
No :
GO to A6
|
|
A4 INSPECT THE FUEL FILL PIPE & VAPOR RECIRCULATION LINE ASSEMBLY |
-
Disconnect the fuel filler pipe from the fuel tank.
-
Inspect the fuel filler pipe for damage or blockage.
Is the fuel fill pipe assembly blocked or damaged?
Yes |
Replace the fuel filler pipe assembly. REFER to: Fuel Tank Filler Pipe (310-01D Fuel Tank and Lines - 3.3L Duratec-V6 – Hybrid (BP), Removal and Installation).
|
No |
Replace the fuel filler pipe assembly. REFER to: Fuel Tank Filler Pipe (310-01D Fuel Tank and Lines - 3.3L Duratec-V6 – Hybrid (BP), Removal and Installation).
|
|
A5 REFUEL USING A DIFFERENT FUEL FILL NOZZLE |
-
Using a different fuel pump nozzle, monitor the fuel
tank pressure (FTP) for typical diagnostic reference values while
filling the fuel tank.
Is the FTP less than 12" H2O / 3.0 kPa?
Yes |
System Normal - Unable to identify the root cause at this time.
|
|
A6 DIAGNOSE THE FRESH AIR HOSE |
-
Disconnect the fresh air line from EVAP canister.
Is the fresh air hose blocked or damaged?
Yes |
Repair / Replace the fresh air hose.
|
|
A7 DIAGNOSE THE EVAP CANISTER |
-
Disconnect the EVAP canister from the fuel vapor load line.
-
Monitor the fuel tank pressure (FTP) to typical diagnostic reference values while filling the fuel tank.
Is the FTP less than 12" H2O / 3.0 kPa?
Yes |
Remove / Replace the EVAP canister. REFER to: Evaporative Emission Canister (303-13A Evaporative Emissions - 2.3L EcoBoost (201kW/273PS), Removal and Installation).
|
No |
Remove / Replace the fuel vapor load line including the EVAP vapor blocking valve (VBV).
|
|
P04B0
Refer to Wiring Diagrams Cell 023-9 for schematic and connector information.
Possible Causes
-
Wiring, terminals and connectors
Visual Inspection and Diagnostic Pre-checks
-
Fuel Vapor Vent Valve FVVV (also known as Refueling Valve)
NOTE:
P04B0 is caused when the refuel valve control circuit is Open
This
diagnostic runs when the cabin refuel button is pressed to open the
refueling valve to allow the vehicle to be fueled without spit back.
PINPOINT TEST B : DTC P04B0
NOTE:
P04B0 is caused when the refuel valve control circuit is Open
|
B1 CHECK THE SYSTEM FOR ANY EVAP (EVAPORATIVE EMISSION)
DTCS |
-
Using the diagnostic scan tool, perform a KOEO self test on the PCM.
Is DTC P04B0 present?
No |
Look for circuit wiring issues and repair as necessary.
|
|
B2 CHECK THE FUEL VAPOR VENT VALVE FVVV (ALSO KNOWN AS THE REFUELING VALVE) CIRCUITS FOR AN OPEN : |
-
Using the diagnostic scan tool, perform a KOEO self test on the PCM.
-
Disconnect the Fuel Vapor Vent Valve (FVVV) connector C4287
.
-
Check for the resistance on the Fuel Vapor Vent Valve.
-
Measure the resistance as below:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-1
|
|
C4287-2
|
Is Resistance between 7.5 – 9.5 ohms?
No |
Replace the FVVV (Fuel Vapor Vent Valve).
|
|
B3 CHECK FUEL VAPOR VENT VALVE CIRCUIT FVVV (ALSO KNOWN AS THE REFUELING VALVE) FOR A SHORT TO VOLTAGE : |
-
Connect the Fuel Vapor Vent Valve (FVVV) connector C4287
.
-
Ignition start or run condition.
-
Measure the voltage as below:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-1
|
|
C175E-24
|
Is any voltage present?
Yes |
the circuit is shorted to voltage and should be repaired.
|
No |
Perform a visual inspection on the connector pins
and the FVVV pins for any visible damage and repair as needed.
|
|
B4 CHECK FUEL VAPOR VENT VALVE (ALSO KNOWN AS THE REFUELING VALVE) CIRCUITS FOR A SHORT TO GROUND : |
-
Disconnect the Fuel Vapor Vent Valve (FVVV) connector C4287
.
-
Measure resistance as below:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-1
|
|
Ground
|
Are the resistances greater than 10,000 ohms?
Yes |
Problem is intermittent look for signs of visual damage on the connector pins and FVVV pins.
|
No |
Look for circuit wiring issues and repair as necessary.
|
|
B5 CHECK FUEL VAPOR VENT VALVE (ALSO KNOWN AS THE REFUELING VALVE) CIRCUITS FOR A OPEN : |
-
Disconnect the fuel vapor vent valve (FVVV) connector C4287
.
-
Measure resistance as below:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-1
|
|
C175E-24
|
Is the resistance less than 3 ohms?
Yes |
Problem is intermittent look for signs of visual damage on the connector pins and FVVV pins.
|
No |
Look for circuit wiring issues and repair as necessary.
|
|
DTC P04B4
Refer to Wiring Diagrams Cell 023-9 for schematic and connector information.
Diagnostics
in this manual assume a certain skill level and knowledge of
Ford-specific diagnostic practices. For information about these
practices,
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Refueling Valve opens to depressurize the tank on Fuel door button press.
On the instant of button press when the pressure or vacuum in the tank is higher than a safe refuel range ( -6.98 In.H2O to +6.98 In.H2O), the refilling valve opens to depressurize the tank to enable a safe refuel (Tank Pressure at 0.25 PSI (6.93 In.H2O)).
This pinpoint test is intended to diagnose the following:
Possible Sources:
-
Broken refueling valve
-
Broken FTP (Fuel Tank Pressure) sensor
-
Refueling Valve (RV) circuit
Check
for any of the circuit codes (P04BA, P04C1, P04C2, P04C9, and P04CD)
related to the door operation prior to following the test procedure
below)
PINPOINT TEST C : P04B4
C1 CHECK THE REFUELING VALVE STUCK CLOSED |
-
Press the Refuel Door request button.
Does the Tank Pressure drop to less than 0.25 PSI (6.92 In.H20)?
|
C2 CHECK THE FTP (FUEL TANK PRESSURE) SENSOR VOLTAGE WITH THE CAPLESS FUEL TANK FILLER PIPE OPENED |
-
Gently release the fuel door using the mechanical release lever located in the trunk.
-
Install the supplemental refuelling adaptor provided
with the vehicle to open the cap less fuel tank filler pipe.
-
Access the PCM and monitor the FTP (VOLT) PID.
Is FTP (Fuel Tank Pressure) Voltage reading between 1.4V -1.54 V?
No |
INSTALL a new FTP sensor. REFER to: Fuel Tank Pressure Sensor and Tube (303-13A Evaporative Emissions - 2.3L EcoBoost (201kW/273PS), Removal and Installation).
|
|
C3 CHECK THE FUEL VAPOR VENT VALVE CIRCUITS FOR A SHORT TO VOLTAGE |
-
Disconnect fuel vapot vent valve (FVVV) C4287
.
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-2
|
|
Ground
|
C4287-1
|
|
Ground
|
Is there any voltage present?
Yes |
REPAIR the circuit in question.
|
|
C4 CHECK THE FUEL VAPOR VENT VALVE CIRCUITS FOR A SHORT TO GROUND |
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1914-2
|
|
Ground
|
C1914-1
|
|
Ground
|
Are the resistances greater than 10,000 ohms?
No |
REPAIR the circuit in question.
|
|
C5 CHECK THE FUEL VAPOR VENT VALVE CIRCUITS FOR AN OPEN |
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1914-2
|
|
C1035A-11
|
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1914-1
|
|
C175B-24
|
Are the resistances less than 3 ohms?
No |
REPAIR the circuit in question.
|
|
C6 CHECK THE FUEL VAPOR VENT VALVE CIRCUITS FOR A SHORT TOGETHER |
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C4287-2
|
|
C4287-1
|
Is the resistance greater than 10,000 ohms?
|
C7 CLEAR ALL PCM (POWERTRAIN CONTROL MODULE)
DIAGNOSTIC TROUBLE CODES |
-
Reconnect all disconnected connectors. Make sure they seat and latch correctly.
-
Using a diagnostic scan tool, CLEAR all PCM Diagnostic Trouble Codes (DTCs).
-
Using a diagnostic scan tool, view the PCM
PDIS.
-
Active command the FVVV valve ON using the PCM FTP (VOLT) PIDS.
Does the FVVV valve turn on (click)?
Yes |
The system is operating correctly at this time. The
concern may have been caused by FVVV connections. ADDRESS the root cause
of any connector or pin issues.
|
No |
INSTALL a new FVVV. TEST the system for normal operation. If the concern is still present,
|
|
Overview
NOTICE:
Repairs of the fuel system are to be achieved only by
replacement of the failed component(s). Repair of a fuel system
component should not be attempted...
Special Tool(s) /
General Equipment
310-D009
(D95L-7211-A)
Fuel Pressure Test Kit
Check
NOTE:
This Fuel System Pressure Check is for the low pressure side of the system...
Other information:
Removal
NOTE:
Removal steps in this procedure may contain installation details.
Remove the cooling module.
Refer to: Cooling Module (303-03A Engine Cooling - 2.3L EcoBoost (201kW/273PS), Removal and Installation).
Remove the bolt, release the tabs and remove the A/C condenser...
O..