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 through the GWM over the HS-CAN. The TCM is an internal component of the PCM. If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets a DTC. For information on the messages sent to the ABS module by the PCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
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 U0401:86 | Invalid Data Received from ECM/PCM A: Signal Invalid | This DTC sets when the ABS module receives invalid data in the accelerator pedal message. |
| ABS U0402:00 | Invalid Data Received from TCM: No Sub Type Information | This DTC sets if the ABS module receives invalid data in any one of the several transmission messages from the PCM. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| ABS U0101:00 | Lost Communication with TCM: No Sub Type Information | This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time. |
Possible Sources
- Network communication concern
- PCM