Diagnostic Test

WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)

Turn the ignition on.
With the scan tool, read active DTCs.
Does the scan tool display this DTC as active?

Yes
- Refer to the DTC INDEX - EXCEPT 500L article and perform the U0019-88-CAN B BUS OFF diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.