Pinpoint Test D: Lost Communication With Body Control Module: Notes
Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the BCM sends messages to the GWM over the HS-CAN1, the GWM relays these messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the BCM, 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 U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | Sets when the ABS module does not receive any messages from the BCM. |
| ABS U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | This DTC sets if the ignition signal status message is invalid for 5 seconds. |
Possible Sources
- Network communication concern
- Over or under voltage concerns
- BCM
- GWM
- ABS module