Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. 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. The 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.

Refer to any Technical Service Bulletins that may apply.
Turn the ignition on.
With the scan tool, check for proper software. Re-flash with proper software in accordance with the service information if needed.
With a scan tool, select View DTCs.
Is the DTC active at this time?

Yes
- Perform the U0001-Can C Bus circuit diagnostic procedure. Refer to U0001-87-CAN C BUS - MISSING MESSAGE .
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .