Adaptive Cruise Control Module (ACC)

U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE





For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams

- When Monitored:
Continuously monitored with the engine running and the Adaptive Cruise Control (ACC) Module in normal mode.

- Set Condition:
The ACC Module doesn't receive a Bus Message from the Anti-Lock Brakes (ABS) Module within 60 milliseconds. The ACC module will disable the ACC system and the ACC UNAVAILABLE message will display in the Cabin Compartment Node (CCN). Once the Diagnostic Trouble Code (DTC) goes to stored, the ACC system will return to normal operation. The DTC will be cleared after the ACC Module sees 100 consecutive key cycles of the STORED DTC.





VERIFY DTC IS ACTIVE
1. Ignition on, engine not running.
2. Using a scan tool, read ACC DTCs.

Is the DTC active at this time?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection..

No

- Perform the Stored Lost Communication DTCs diagnostic test procedure. Stored Lost Communication DTCs .