Pinpoint Test BR: Abs Module Communication Concern With CHCM
Normal Operation and Fault Conditions
With the ignition ON, the CHCM sends messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC. This can be due to a CHCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the CHCM, refer to Network Message Chart , Description and Operation in the Service Articles.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U012A:00 | Lost Communication with Chassis Control Module 'A': No Sub Type Information | This DTC sets when the ABS module does not receive any messages from the CHCM within the allowed time. |
Possible Sources
- Network communication concern
- CHCM