Pinpoint Test BM: Abs (Anti-Lock Brake System) Module Communication Concern With ATCM (All Terrain Control Module): Notes
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 GWM over the HS-CAN2, the GWM relays these messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the specified time frame, the ABS module sets 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 P05D3:86 | Driver Mode Select Switch "A" Range/Performance: Signal Invalid | Sets when the drive mode message contains "invalid" instead of the actual requested drive mode. |
| ABS U0138:00 | Lost Communication with All Terrain Control Module: No Sub Type Information | Sets if the ATCM messages are missing. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- ATCM
- ABS