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Normal Operation and Fault Conditions

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With the ignition ON, the IPC sends messages to the ABS module through the GWM over the HS-CAN 3. 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 IPC, refer to the Network Message Chart in Description and Operation in the Anti-Lock Brake System (ABS) and Stability Control article. 

PPT AR ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC Description Fault Trigger Conditions
U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information This DTC when the ABS module does not receive any messages from the IPC. This can be due to a IPC failure, a circuit failure on the HS-CAN or an excessive load on the network.
U0423:82 Invalid Data Received from Instrument Panel Cluster Control Module: Alive/Sequence Counter Incorrect/Not Updated This DTC when the IPC does not update information in the following messages; traction control status, stability control status, hill descent mode status, hill start assist status, trailer sway control configuration.