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Pinpoint Test Ai: Abs Module Communication Concern With Pcm

Normal Operation and Fault Conditions 

With the ignition ON, the PCM sends messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC. This can be due to a PCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PCM, refer to Network Message Chart .

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Condition
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information This DTC sets when the ABS module receives invalid data in any of the following messages: accelerator pedal, brake pedal, driven wheel torque or neutral tow status.
ABS U0401:64 Invalid Data Received from ECM/PCM A: Signal Plausibility Failure This DTC sets when the ABS module receives invalid data in the gear selector position or driven wheel torque messages.
ABS U0401:7C Invalid Data Received from ECM/PCM A: Slow Response This DTC sets when the ABS module receives a message from the PCM indicating the driven wheel torque is insufficient for regenerative braking.
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid This DTC sets when the ABS module receives invalid data in the accelerator pedal message.

Possible Sources 

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