Instrument Panel Cluster (IPC) - System Operation and Component Description: Indicators
Prove-Out
The IPC and other modules carry out a display prove-out to verify all module controlled warning/indicator lamps and monitored systems are functioning correctly within the IPC. The IPC and other modules, such as the RCM, provide a timed prove-out of some indicators while other indicators illuminate upon engine start up. When the ignition is cycled to on with the engine off, the indicators illuminate to prove-out according to the following table:
| Indicator | Indicator Type | Prove-Out Duration |
|---|---|---|
| ABS | Warning | 3 seconds |
| Airbag | Warning | 8 seconds |
| Brake | Warning | 3 seconds |
| Charge | Warning | Engine startup |
| Diesel exhaust fluid level low | Informational | None |
| Diesel particulate filter auto regeneration control | Informational | None |
| Door ajar (base message center IPC) | Warning | None |
| Engine service (wrench) (base message center IPC) | Informational | 3 seconds |
| Glow plug (wait to start) | Informational | None |
| High beam | Informational | None |
| Information | Informational | None |
| LH/ RH turn | Informational | None |
| Lights on | Informational | None |
| Low fuel | Warning | 3 seconds |
| Low oil pressure | Warning | Engine startup |
| Low washer fluid | Informational | 3 seconds |
| MIL | Warning | Engine startup |
| Safety belt | Warning | 65 seconds or until the driver safety belt is buckled |
| Stability-traction control (sliding car icon) | Warning | 3 seconds |
| Stability-traction control disabled (sliding car OFF icon) | Informational | 3 seconds |
| TPMS | Warning | 3 seconds |
ABS Warning Indicator
The IPC receives the ABS warning indicator request message from the BCM over the MS-CAN. The BCM receives the ABS warning indicator request message from the ABS module over the HS-CAN. If a fault condition exists in the ABS, the ABS module sends the ABS warning indicator request message to either flash or illuminate the ABS warning indicator.
Airbag Warning Indicator
The IPC receives the airbag warning indicator request from the BCM over the MS-CAN. The BCM receives the airbag indicator request from the RCM over the HS-CAN. If a SRS concern is detected, the RCM sets a DTC and the IPC illuminates the airbag warning indicator.
The IPC monitors the airbag warning indicator internal circuitry and sets DTC B1A14:11 or DTC B1A14:13 if an internal fault condition exists.
Brake Warning Indicator
The IPC uses 3 basic messaged inputs to control the brake warning indicator. The first 2 messages are the parking brake position switch and the brake fluid level switch sent from the BCM over the MS-CAN. The third is the brake (red) warning indicator request message sent from the ABS module through the BCM over the MS-CAN.
The BCM provides reference voltage to both the parking brake position switch and the brake fluid level switch. When the parking brake is applied, the parking brake position switch closes to ground, pulling the parking brake signal circuit low. When a low brake fluid level condition exists, the brake fluid level switch closes, sending the signal circuit low. If the brake fluid level switch is disconnected, the BCM reference voltage sent to the brake fluid level switch is sent high. When the BCM detects the brake fluid level signal low, the BCM sends the brake fluid level low request to the IPC. When the BCM detects the parking brake signal low, the BCM sends the parking brake warning request to the IPC.
When the ABS module detects a base brake system concern or other ABS-related concerns that affect the EBD function, the ABS module sends the brake (red) warning indicator request to the BCM over the HS-CAN. The BCM in turn sends the brake (red) warning indicator request to the IPC over the MS-CAN to illuminate the brake warning indicator.
If the brake fluid level drops and closes the brake fluid level switch, the BCM waits approximately 30 seconds before sending the IPC the brake fluid level low message to illuminate the brake warning indicator.
Charging System Warning Indicator
The IPC receives the charging system indicator request from the BCM over the MS-CAN. When a fault is detected in the charging system, the BCM sends the IPC the charging system indicator request to illuminate the charging system warning indicator.
Diesel Exhaust Fluid Level Low Indicator (Diesel Only)
The IPC receives the diesel exhaust fluid level indicator request from the BCM over the MS-CAN. The BCM receives the diesel exhaust fluid level indicator request from the PCM over the HS-CAN. The PCM receives the diesel exhaust fluid level status from the reductant dosage control module over a dedicated LIN line.
Diesel Particulate Filter Auto Regeneration Control Indicator (Diesel Only)
The IPC provides a menu selection to allow the user to turn off the diesel particulate filter auto regeneration mode. When the driver turns off the auto regeneration mode, the IPC sends a request to the BCM over the MS-CAN. The BCM gateways the request to the PCM over the HS-CAN. If the PCM agrees to turn off the diesel particulate filter auto regeneration control, the PCM sends a confirmation message back to the IPC though the BCM and the IPC illuminates the diesel particulate filter auto regeneration control indicator.
Door Ajar Indicator (Base Message Center IPC Only)
The BCM monitors each of the ajar inputs and sends a door status message to the IPC over the MS-CAN to illuminate the door ajar indicator.
Engine Service (Wrench) Indicator (Base Message Center IPC Only)
The IPC provides the engine service wrench indicator to indicate a transmission malfunction, fuel cutoff system malfunction and an engine oil change is due. The IPC receives the engine service indication message from the BCM over the MS-CAN. The BCM receives the engine service indication message from the PCM over the HS-CAN to illuminate the engine service wrench indicator.
Glow Plug (Wait To Start) Indicator (Diesel Only)
The IPC receives the glow plug indication request from the BCM over the MS-CAN. The BCM receives the glow plug indication request from the PCM over the HS-CAN. When the engine is cold and the ignition is first placed in ON, the PCM sends the IPC a request to illuminate the glow plug (wait to start) indicator.
The IPC monitors the glow plug indicator internal circuitry and sets DTC P0381:01 if an internal fault condition exists.
High Beam Indicator
When the high beams are turned on, the BCM sends the high beam indicator request to the IPC over the MS-CAN to illuminate the high beam indicator.
Information Indicator
The information indicator illuminates when the IPC displays messages in the message center. Two different colors (red and amber) are used to indicate the nature of the message. If the message is an informational message, the indicator is displayed in amber. If the message is a warning, the indicator is displayed in red. The information indicator is also used in conjunction with the perimeter alarm system as a theft deterrent. When the perimeter alarm is armed, the IPC receives the alarm mode message from the BCM to flash the information indicator.
LH-RH Turn Signal Indicator
When the multifunction switch is in the LH or RH turn position or if the hazard switch is on, a turn indicator command message is sent to the IPC over the MS-CAN from the BCM. Upon receipt of the applicable turn signal on/off request, the IPC flashes the turn signal indicator on and off.
Lights On Indicator
When the parking lamps are turned on, the BCM sends the position light indication message to the IPC over the MS-CAN to illuminate the lights on indicator.
Low Fuel Indicator
The IPC uses the fuel level status message sent from the BCM to control the low fuel indicator. When the fuel level is approximately 6 L [1.6 gal]) or less, the low fuel indicator illuminates. When the fuel level is approximately 12 L [3.2 gal]) or higher, the low fuel indicator turns off. When a MyKey® programmed key is used, the low fuel indicator illuminates when the fuel level is approximately 9 L [2.4 gal]) or less. When a MyKey® programmed key is used, the low fuel indicator turns off when the fuel level is approximately 15 L (4.0 gal).
Low Oil Pressure Warning Indicator
The engine oil pressure switch is hardwired to the PCM. The IPC receives the oil pressure warning message from the BCM over the MS-CAN. The BCM receives the oil pressure warning message from the PCM over the HS-CAN.
Low Washer Fluid Level Indicator (Base IPC Only)
The IPC receives the washer fluid level low message from the BCM over the MS-CAN. When the washer fluid level is low, the BCM sends the washer fluid level low message to the IPC to illuminate the low washer fluid level indicator.
MIL
The IPC receives the MIL request message from the BCM over the MS-CAN. The BCM receives the MIL request from the PCM over the HS-CAN.
Safety Belt Warning Indicator
The RCM monitors the safety belt position through the driver safety belt buckle switch. The RCM provides the driver safety belt status message to the BCM over the HS-CAN. The BCM provides the driver safety belt status message to the IPC over the MS-CAN to either turn on or turn off the safety belt warning indicator.
Stability-Traction Control Indicator (Sliding Car Icon)
The IPC receives the stability/traction control indication message from the BCM over the MS-CAN. The BCM receives the stability/traction control indication message from the ABS module over the HS-CAN. The stability-traction control indicator (sliding car icon) flashes when the vehicle stability-traction control is in active mode, and illuminates continuously if a fault condition exists in the stability-traction control system. The IPC monitors the stability/traction control indication message from the BCM module and either flashes the stability-traction control indicator (sliding car icon) or illuminates it steadily depending on the condition.
Stability-Traction Control Disabled Indicator (Sliding Car OFF Icon)
The stability-traction control is turned on/off with the dedicated traction control disable switch. When the driver enables or disables the stability-traction control system, the ABS module sends the stability/traction control disabled indicator request message to the BCM over the HS-CAN. The BCM sends the stability/traction control disabled indicator request message to the IPC over the MS-CAN to illuminate or turn off the stability-traction control disabled indicator (sliding car OFF icon) based upon the system state.
When a MyKey® administrator has set the AdvanceTrac® On feature to always on and a MyKey® programmed key is in use, the stability-traction control system cannot be disabled. The stability-traction control indicator still functions normally to indicate a stability-traction control system fault and a stability-traction control active event.
Tow Haul Indicator
The IPC receives the tow haul indicator request from the BCM over the MS-CAN. The BCM receives the tow haul indicator request from the TCM over the HS-CAN. When the tow haul function is selected, the TCM sends the tow haul indicator request to the IPC to illuminate the tow haul indicator.
TPMS Warning Indicator
The IPC receives the TPMS data from the BCM over the MS-CAN. If the BCM determines that the tire pressure has exceeded the low tire pressure limits, the tire pressure indication message is sent to the IPC to illuminate the TPMS warning indicator. If a TPMS fault condition exists, the BCM sends the tire pressure indication message to the IPC to flash the TPMS warning indicator.