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.

CHECK IF THE DTC RESETS

Turn the ignition on.
With the scan tool, erase EVCU DTCs.
Turn the ignition off. Remove the key from the Ignition Switch, close doors and allow the EVCU to shut down.
NOTE:
Allow up to two minutes for the EVCU to shut down. Opening the vehicle door will interrupt the shut down process.
Turn the ignition on.
With the scan tool, read EVCU DTCs.
Does this DTC reset?

Yes
- Refer to ELECTRIC VEHICLE CONTROL UNIT (EVCU) MODULE - DIAGNOSTIC CODE INDEX - 500 - ELECTRIC and perform the appropriate diagnostic procedure for speed control switches.
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .