Pinpoint Test BR: Abs (Anti-Lock Brake System) Module Communication Concern With VDM (Vehicle Dynamics Control Module)
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the VDM 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 VDM 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 VDM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - Electric - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U0122:00 | Lost Communication With Vehicle Dynamics Control Module: No Sub Type Information | Sets if the VDM messages are missing. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- VDM
- EBB unit
Pinpoint Tests BR: ABS Module Communication Concern With VDM