Pinpoint Test BM: Abs Module Communication Concern With The ATCM (All Terrain Control Module)
NOTE:
The ATCM may also be called the traction control switch in other publications
Normal Operation and Fault Conditions
With the ignition ON, the ATCM sends messages to the ABS module over the HS-CAN 2. 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 ATCM, refer to the Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U0138:00 | Lost Communication with All Terrain Control Module: No Sub Type Information | This DTC sets when the ABS module does not receive any messages from the IPMA within the allowed time. |
| ABS U0439:00 | Invalid Data Received From All Terrain Control Module: No Sub Type Information | This DTC sets when the ABS module receives messages from the IPMA, but the messages contain invalid data. |
Possible Sources
- Network communication concern
- ATCM
Pinpoint Tests BM: ABS Module Communication Concern With ATCM