Normal Operation and Fault Conditions
With the ignition ON, the RCM sends messages to the ABS module over the HS-CAN 2. If the ABS module does not receive these messages within a certain time frame, the ABS module sets a DTCs. For information on the messages sent to the ABS module by the RCM, refer to the Description and Operation in Anti-Lock Brake System (ABS) and Stability Control article.
PPT BH ABS MODULE DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | Sets in continuous memory and on-demand when the expected RCM messages such as yaw rate sensor, lateral and longitudinal accelerometers are missing for more than 5 seconds. |
| U0151:87 | Lost Communication With Restraints Control Module: No Sub Type Information | Sets in continuous memory and on-demand when the ABS module detects the RCM status messages are missing. |
| U0452:29 | Invalid Data Received From Restraints Control Module: Signal Invalid | Sets if the ABS module receives a parking brake 'drive away release' request and the driver seat belt buckle status message contains invalid information. |
| U0452:41 | Invalid Data Received From Restraints Control Module: General Checksum Failure | Sets if the yaw rate, lateral acceleration, longitudinal acceleration or roll rate message checksum is incorrect or does not match the calculated checksum more than twice. |
| U0452:86 | Invalid Data Received From Restraints Control Module: Signal Invalid | Sets if any of the RCM signal messages (yaw rate, lateral acceleration, longitudinal acceleration and roll rate) are out of range or the signal contains invalid information. |