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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 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 Sets when the ABS module is missing any of the IPC data messages. This can be due to an IPC failure, a GWM failure, a circuit failure on the HS-CAN or an excessive load on the network.