Pinpoint Test BM: Abs (Anti-Lock Brake System) Module Communication Concern With The ATCM (All Terrain Control Module)
Refer to: MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the ATCM sends messages to the ABS module over the HS-CAN2. If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets one or more Diagnostic Trouble Codes (DTCs). This can be due to a ATCM failure, a circuit failure on the CAN or an excessive load on the network. For information on the messages sent to the ABS module by the ATCM, 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 U0138:00 | Lost Communication with All Terrain Control Module: No Sub Type Information | Sets when the ABS module does not receive any messages from the ATCM. |
| ABS U0138:86 | Lost Communication with All Terrain Control Module: Signal Invalid | Sets when the ABS module is configured for one type of selectable drive mode switch and the ABS module receives a message for a different type of selectable drive mode switch. |
| ABS U0138:87 | Lost Communication with All Terrain Control Module: Missing Message | Sets when the ABS module does not receive the 4x4 switch data message in the allowed time. |
Possible Sources
- Network communication concern
- ATCM
Pinpoint Tests BM: ABS Module Communication Concern With ATCM