Pinpoint Test A : U0121: Notes
DTC Fault Trigger Condition-PCM
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | The PCM sets this DTC if data messages from the ABS module through the GWM are missing. |
Normal Operation and Fault Conditions
REFER to: MODULE COMMUNICATIONS NETWORK (1 OF 2) .
Possible Sources
- Communications network concern
- ABS module
- GWM
- PCM