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

NOTE:

For vehicle communication problems, use the scan tool to refer to the network review screen. This screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?

Yes
- Refer to DTC INDEX article and perform the U0101-Lost Communication with TCM diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.