Diagnostic Test

WARNING: This page is about a different car, the 2015 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS ACTIVE

Ignition on, engine not running.
With the scan tool, select view DTCs.
Is the DTC Active at this time?

Yes
- Refer to U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE and perform the U0121-Lost Communication with Anti-Lock Brake Module diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.