Ford Explorer: Instrumentation, Message Center and Warning Chimes / Description and Operation - Warning Chimes - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  Module Network Input Messages - IPC

  Module Network Input Messages - ACM / DSP

Warning Chime Characteristics

NOTE: There are instances where some chimes may sound through the IPC and should not be interpreted as a fault in the audio system. An example might be when the ignition is off, with the key in the ignition and the driver door ajar. In this instance, the audio system is offline and the key-in-ignition chime defaults to the IPC.

The IPC uses multiple network messages to control the overall warning chime arbitrator. The IPC arbitrates and controls all chimes regardless if they are sounded through the audio system or the IPC. The warning chimes all sound through the audio system except for the turn signal tick-tock chime which is sounded through the IPC. In the event of an audio system fault, the IPC sounds all chimes. The audio system has the ability to sound up to 2 chimes at a time while the IPC can only sound a single chime at a time.

The warning chimes use volume, chime frequency, length of time the chime sounds, decay of the chime tone and the number of chime tones to identify which chime is sounding. Most warning chimes have unique characteristics, however, there are chimes that do sound the same. The chime characteristics are defined by the different chime types:

• Information
• Soft-warning
• Hard-warning
• Tick-tock (on-off)

Warning Chimes

Active Park Assist

The active park assist system chimes alert or draw the driver's attention to the requested actions displayed in the message center. The active park assist chime sounds through the front speakers. The IPC receives the active park assist chime request from the GWM over the HS-CAN3. The GWM receives the active park assist chime request from the IPMB over the HS-CAN2

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

ACC Warning Chime

The ACC warning chime supplements the message center displays to draw the driver's attention to the need to intervene and take control of the vehicle. There are 2 levels of chime output (high priority and low priority) based upon the nature and urgency of the warning. The ACC warning chime sounds through the front speakers. The audio system sounds the appropriate warning chime when it receives the ACC warning request message from the IPMA.

The low priority ACC warning chime is a single-tone, 1-second chime that sounds to alert the driver the ACC system has shut itself off due to low vehicle speed (approximately 32 km/h [20 mph]) and the driver needs to intervene if further braking is required or to resume the ACC operation.

The high priority ACC warning chime is a 0.25-second chime that sounds 12 times. The chime alerts the driver the vehicle is approaching the vehicle ahead at a faster rate than the ACC system can brake the vehicle and the driver needs to apply the brakes to slow the vehicle down.

The IPC receives the ACC warning request messages from the GWM over the HS-CAN3.

The GWM receives the ACC warning request message from the IPMA over the HS-CAN2.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Airbag Secondary Warning Chime

The airbag secondary warning chime warns the airbag warning indicator LED is inoperative. The airbag secondary warning chime sounds through the front speakers. If the IPC detects a fault with the airbag warning indicator LED during the bulb prove out, the airbag secondary warning chime sounds. If the IPC detects a fault in the airbag warning indicator when a SRS fault condition exists and the RCM has sent the IPC the airbag indicator request, the airbag secondary warning chime sounds. The airbag chime is a 0.5-second chime that sounds 5 times.

When a fault condition is detected, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Backup Warning Chime (Except North America)

The reverse warning chime warns the vehicle is in reverse. When the transmission is in reverse, the PCM sends the gear lever position message to the GWM over the HS-CAN1. The GWM sends the gear lever position message to the IPC over the HS-CAN3 to sound a 1-second chime continuously through the front speakers.

BeltMinder® Feature

NOTE: Whenever the vehicle is operated using MyKey®, the IPC enables the Belt-Minder®.

The BeltMinder® is configurable on or off.
Refer to: Seatbelt Minder Deactivating/Activating (413-01 Instrumentation, Message Center and Warning Chimes, General Procedures).

The BeltMinder® feature supplements the current seatbelt warning function and is enabled after the current seatbelt warning is complete. The BeltMinder® reminds the driver the driver or front passenger seatbelt is unbuckled by intermittently sounding a chime and simultaneously illuminating the seatbelt warning indicator through the front speakers. The BeltMinder® begins once the current seatbelt warning has ended and the vehicle speed has exceeded 10 km/h (6 mph) with the driver or front passenger seatbelt unbuckled. While activated, the BeltMinder® chime provides a series of chimes/seatbelt warning indicator flash sequences.

If the vehicle speed drops below 5 km/h (3 mph) once the BeltMinder® chime has activated, the chime turns off and the seatbelt warning indicator remains on. When the vehicle speed exceeds 10 km/h (6 mph) again, the BeltMinder® chime resumes.

When MyKey® is in use, the driver cannot configure the Belt-Minder® off. Once the Belt-Minder® is activated, the Belt-Minder® continues to chime periodically (does not time out after 5 minutes) and the audio system is muted until the driver and passenger seatbelts are fastened.

To control the BeltMinder®, the IPC receives the vehicle speed, gear lever position, driver and passenger seatbelt buckle status messages from the GWM over the HS-CAN3.

The GWM receives the vehicle speed and gear lever position messages from the PCM over the HS-CAN1.

The IPC receives the driver and passenger seatbelt status messages from the RCM over the HS-CAN2.

When the conditions require the Belt-Minder® chime, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Blind Spot Information System (BLIS)/ CTA Warning Chime

The BLIS®)/ CTA warning chime alerts the driver that a vehicle has been detected or there is a system fault. The BLIS®)/ CTA warning chime sounds a 0.25-second chime continuously until the request is ended. The chime sounds through the rear speakers.

The IPC receives the CTA left status, CTA right status, side obstacle sensor status-left and the side obstacle sensor status-right request messages from the GWM over the HS-CAN3.

The GWM receives the CTA left status and side obstacle sensor status-left request message from the SODL, and CTA right status, and side obstacle sensor status-right request message from the SODR over the MS-CAN.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Door Ajar Warning Chime

The door ajar warning chime warns that a door is ajar and sounds the chime through the front speakers. When a door becomes ajar while the ignition is in RUN with vehicle speed greater than 5 km/h (3 mph), the IPC displays the appropriate door ajar warning message and sounds a single chime tone for each door opened. The door ajar chime only sounds once for each time the door is opened, and only repeats the chime if the door is closed then reopened.

The IPC receives the driver door ajar status, passenger door ajar status, left rear door ajar status, right rear door ajar status or liftgate ajar status message from the GWM over the HS-CAN3. The GWM receives the driver door ajar status, passenger door ajar status, left rear door ajar status, right rear door ajar status or liftgate ajar status message from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Electric Vehicle (EV) Engine Off Reminder

The Electric Vehicle (EV) engine off reminder chime informs the driver the vehicle is in a ready to drive state or the ignition has been left on. If the chime sounds when the vehicle is in a ready to drive state, the ready to drive message also displays in the message center. The IPC receives the driver door ajar status, gear lever position and power pack status messages from the GWM over the HS-CAN3. The GWM receives the gear lever position and power pack status messages from the PCM over the HS-CAN1. The GWM receives the driver door ajar status message from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Fuel Door Release Chime (PHEV)

The fuel door release chime informs the driver that the fuel door has been released and opened when the fuel door release button is pressed. The IPC receives the fuel door release chime request from the GWM over the HS-CAN3. The GWM receives the fuel door release chime request from the PCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Forward Collision Warning Chime

The forward collision warning chime warns that a forward collision potential has been detected or the CCM detects a forward collision warning system concern. Once the forward collision system detects a possible forward collision, the CCM sends a message to the IPMA over a private CAN. The IPMA sends a message to the IPC through the GWM to flash the forward collision warning in the message center. The IPMA sends a forward collision warning chime request to the IPC through the GWM to sound a 0.25-second chime tone 12 times.

The forward collision warning system and chime can be disabled or turned off using the center stack display. When MyKey® is in use, the driver cannot configure the forward collision warning system or chime off. When the driver disables the forward collision warning chime, the IPMA sends the IPC the forward collision chime request through the GWM to sound a 0.25-second chime tone 12 times at 50% volume. The forward collision warning chime and confirmation chime are both sounded through the front speakers.

The IPC receives the forward collision warning chime request from the GWM over the HS-CAN3.

The GWM receives the forward collision warning chime request from the IPMA over the HS-CAN2.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Headlamps On Warning Chime

The headlamps on warning chime warns the headlamps are on when exiting the vehicle. When the driver exits the vehicle with the driver door ajar, the headlamp switch is in the PARK or HEADLAMP position and the ignition is OFF, the BCM sends the headlamp on warning chime message to the IPC through the GWM to sound the headlamps on chime. The headlamps on chime sounds a 1-second chime tone continuously.

The IPC receives the headlamp on warning chime request from the GWM over the HS-CAN3.

The GWM receives the headlamp on warning chime request from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Home Safe Light Chime

The home safe light chime uses the memory feedback chime to sound a single chime to inform the driver the home safe light feature has been activated. The home safe light illuminates the area surrounding the vehicle for a limited time. The IPC receives the home safe light chime request from the GWM over the HS-CAN3. The GWM receives the home safe light chime request from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Ignition-Engine On Warning Chime

The ignition-engine on chime informs the driver they are exiting the vehicle when the ignition has been left on (engine off) or the engine is running. When the driver exits the vehicle with the ignition on or with the engine running, the ignition-engine on warning chime sounds five 1-second chime tones. The ignition-engine on warning chime sounds through the front speakers. The IPC uses driver door ajar status, transmission gear display and power pack status messaged inputs to control the ignition-engine on warning chime.

The IPC receives all required messages from the GWM over the HS-CAN3.

The GWM receives the driver door ajar status message from the BCM over the HS-CAN1.

The GWM receives the transmission gear display and power pack status messages from the PCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Key-In-Ignition Warning Chime

The key-in-ignition warning chime warns the key is still in the ignition lock cylinder or the ignition is in ACC when the driver door is ajar. The key-in-ignition warning chime sounds repetitive 0.5-second chime tones from the front speakers until either the key is removed from the lock cylinder, the ignition is in RUN or the driver door is closed.

The IPC receives the key-in-ignition status from the GWM over the HS-CAN3.

The GWM receives the key-in-ignition status from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Lane Keeping Alert Warning System Chime

The lane keeping alert warning chime alerts the driver they have removed their hands from the steering wheel. The lane keeping alert warning chime sounds three 0.25-second chime tones through the front speakers.

The IPC receives the lane keeping system hands off display request from the GWM over the HS-CAN3.

The GWM receives the lane keeping system hands off display request from the IPMA over the HS-CAN2.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Memory Feedback Chime

The memory feedback chime informs the driver the selected preferences have been programmed successfully using the memory switches. When the driver holds either of the memory buttons, the adjustable features including seat position, pedal position or side mirror position will be stored in the DSM. The DSM sends a requests to the IPC to sound the feedback chime.

The IPC receives the memory feedback chime request from the GWM over the HS-CAN3. The GWM receives the memory feedback chime request from the DSM over the MS-CAN.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Message Center Warning Chime

The message center warning chime feature draws the driver's attention to the message center display to view new warning messages. There are 3 different message center warning chime types that are defined by the length of the chime tone, which are designed to create a greater sense of urgency based on the nature of the condition and message displayed in the message center.

• Informational (1-second chime)
• Soft warning (0.5-second chime)
• Hard warning (0.25-second chime)

When a new message request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Parking Aid Chime

The parking aid system uses a visual display in the centerstack infotainment display and a chime to alert the driver objects are close to the vehicle. The parking aid chime sounds a repetitive chime tone that decreases the time off between chime tones as objects get closer to the sensor until a continuous tone is heard. The parking aid chime sounds through the front speakers for front parking aid, and through the rear speakers for rear parking aid.

The IPC receives the parking aid chime request from the GWM over the HS-CAN3.

The GWM receives the parking aid chime request from the IPMB (with 360° camera) or PAM (without 360° camera) over the HS-CAN2.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Parking Brake Warning Chime

The parking brake warning chime warns the parking brake is engaged when the vehicle is in motion. The parking brake warning chime sounds if the ignition is in RUN, the parking brake is engaged, and the vehicle speed is greater than 5 km/h (3 mph). The parking brake warning chime stops sounding and resets if the parking brake is released, the ignition is not in RUN, the vehicle speed is less than 5 km/h (3 mph), or after 90 seconds from the time the chime is activated. The parking brake warning chime sounds a repetitive 0.5 second chime tone through the front speakers.

The IPC receives the parking brake chime request from the GWM over the HS-CAN3.

The GWM receives the parking brake chime request from the BCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Power Liftgate Warning Chime

The power liftgate warning chime alerts the operator the power liftgate close request has been activated. The chime sounds through the rear speakers as part of the liftgate close function. The IPC receives the power liftgate chime request from the GWM over the HS-CAN3. The GWM receives the power liftgate chime request from the RGTM over the MS-CAN.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Seatbelt Warning Chime

The seatbelt warning chime warns the seatbelt is not fastened. The seatbelt warning chime sounds a repetitive 1-second chime tone for 6 seconds through the front speakers when the driver seatbelt is not fastened and the ignition is transitioned from OFF or ACC to ON or START. The seatbelt warning chime stops sounding when the seatbelt is fastened, when the ignition is transitioned from ON or START to OFF or ACC, or when the chime has sounded for 6 seconds.

The IPC receives the driver seatbelt buckle status and passenger seatbelt buckle status messages from the GWM over the HS-CAN3.

The GWM receives the driver seatbelt buckle status and passenger seatbelt buckle status messages from the RCM over the HS-CAN2.

When the conditions require the seatbelt warning chime, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Service AdvanceTrac Warning Chime

The service AdvanceTrac warning chime warns the ABS module has detected a fault condition in the stability-traction control system. If a fault condition exists in the stability-traction control system, the ABS module sends the IPC the brake chime request to sound the warning chime. The service AdvanceTrac warning chime sounds 3 0.5-second chime tones through the front speakers.

The IPC receives the brake chime request from the GWM over the HS-CAN3. The GWM receives the brake chime request from the ABS module over the HS-CAN2.

When the conditions require the seatbelt warning chime, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Transmission Not In Park Warning Chime

The IPC provides a transmission not in park warning chime that sounds along with the transmission not in park message center warning message to inform the driver the vehicle is not in PARK (P). The IPC displays the shift to park message and the PRNDL not in park warning chime sounds three 0.5-second chime tones if the selector lever is not in PARK (P), the ignition is OFF and the driver door is open or ajar.

For vehicles equipped with a gearshift lever, the IPC requires the transmission gear display, transport mode, vehicle speed, driver door ajar and ignition status to control the transmission not in park warning chime.

For vehicles equipped with a rotary shifter, the IPC requires the transmission gear status, driver door ajar status, ignition status and GSM gear message request messages to control the transmission not in park warning chime.

The IPC receives all necessary messages from the GWM over the HS-CAN3.

The GWM receives the transmission gear display, transmission gear status and vehicle speed messages from the PCM over the HS-CAN1.

The GWM receives the driver door ajar status, ignition status and transport mode messages from the BCM over the HS-CAN1.

The GWM receives the GSM gear message request from the GSM over the HS-CAN2.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.

Turn Signal On Chime Tone

The IPC provides a repetitive 1-second on/off tick-tock chime tone along with visual RH or LH turn indicators to inform the driver the turn signal or hazard lamp function is on.

The IPC receives the left turn lamp on request and right turn lamp on request messages from the GWM over the HS-CAN3.

The GWM receives the left turn lamp on request and right turn lamp on request messages from the BCM over the HS-CAN1.

Turn Signal Left On Chime

The turn signal left on or turn signal minder chime uses both odometer and turn signal status messages. The turn signal left on chime sounds a repetitive 1-second chime through the front speakers when the vehicle is driven with the turn signal on for more than 3.2 km (2.0 miles).

The IPC receives the turn signal switch status and odometer count from the GWM over the HS-CAN3.

The GWM receives the turn signal switch status from the BCM over the HS-CAN1.

The GWM receives the odometer count from the PCM over the HS-CAN1.

When a chime request is received, the IPC sends the IPC chime request message to the ACM or DSP (if equipped) to sound the chime.