Normal Operation and Fault Conditions
With the ignition ON, the HVAC module sends messages to the ABS module through the GWM over the MS-CAN. If the ABS module does not receive these messages within a certain time frame, the module sets DTCs. For information on the messages sent to the ABS module by the HVAC module, refer to the Network Message Chart in Description and Operation in the Anti-Lock Brake System (ABS) and Stability Control article.
PPT CE ABS MODULE DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0164:00 | Lost Communication With HVAC Control Module: No Sub Type Information | This DTC sets when the ABS module receives the auto hold or selectable drive mode messages from the HVAC module with no change in the data. This can be due to a HVAC module failure, a circuit failure on the network or an excessive load on the network. |
| U0164:87 | Lost Communication With HVAC Control Module: Missing Message | This DTC sets when the ABS module does not receive the auto hold or selectable drive mode messages from the HVAC module in the alloted time. This can be due to a HVAC module failure, a circuit failure on the network or an excessive load on the network. |
| U0424:86 | Invalid Data Received From HVAC Control Module: Signal Invalid | This DTC sets when the ABS module is configured for one type of selectable drive mode switch and the ABS module receives a message for a different type of selectable drive mode switch. If the auto hold switch or the selectable drvie mode switch message is received with invalid data, this DTC also sets. |