Adaptive Cruise Control (ACC)

U0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE

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

- When Monitored:

Ignition run time is greater than one second.
Battery voltage between 9 and 16 volts.
Engine run time greater than three seconds.

- Set Condition:

Bus messages not received from the Body Control Module (BCM) for approximately two to five seconds.

Possible Causes:

ACTIVE DTC

1. Ignition on, engine not running.
2. With the scan tool, select view DTCs.

Is the DTC Active at this time?

Yes

- Perform the U0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) MODULE diagnostic procedure. Body Control Module (BCM)

No

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