Pinpoint Test G : DTC (Diagnostic Trouble Code) U0121:00: Notes
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
The PAM communicates with the ABS module through the HS-CAN1, HS-CAN2 and the GWM.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | A continuous memory DTC that sets in the PAM if messages received from the ABS module are missing for 5 seconds or more. |
Possible Sources
- Communication network concern
- ABS module
- GWM concern
- PAM (integral to the BCM)