Normal Operation and Fault Conditions
With the ignition ON, the PCM sends messages to the ABS module over the HS-CAN . If the ABS module does not receive these messages within the specified time frame, the ABS module sets Diagnostic Trouble Codes (DTCs). This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network. For information on the messages sent to the ABS module by the PCM , TCM and differential control module - rear,
Refer to: ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL - SYSTEM OPERATION AND COMPONENT DESCRIPTION
DTC FAULT TRIGGER CONDITION
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0040:87 | Brake Pedal Switch "A": Missing Message | This DTC sets in continuous memory and on-demand if the brake pedal position message is missing for more than 500 ms. This can be due to a PCM failure, a stoplamp switch failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | This DTC sets in continuous memory and on-demand if any one of the following messages is missing; brake pedal position, cruise control status, power pack status or reverse gear. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| U0101:00 | Lost Communication With TCM: No Sub Type Information | This DTC sets in continuous memory and on-demand if the selector lever (PRNDL) status message is missing. |
| U0136:00 | Lost Communication With Differential Control Module - Rear: No Sub Type Information | This DTC sets in continuous memory and on-demand if the all-wheel drive lock status message is missing. |
| U0437:68 | Invalid Data Received From Differential Control Module - Rear: Event Information | This DTC sets in continuous memory and on-demand if the all-wheel drive lock status message contains incorrect information. |