Diagnostic Test
WARNING: This page is about a different car, the 2012 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, read the DTCs.
Is the DTC Active at this time?
Yes
- Refer to U0100-00-LOST COMMUNICATION WITH ECM/PCM and perform the U0100-Lost Communication with ECM/PCM diagnostic procedure.
No
- Refer to COMMUNICATION - DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.