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 FOR AN ACTIVE DTC
NOTE:
This DTC may set if there is a loss of communication between the PCM and BCM or a CAN bus concern. Diagnose and repair any U-codes prior to diagnosing this DTC.
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Wait 30 seconds.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
CHECK THE PCM FOR DTCS
1. With the scan tool, read the PCM DTCs.
  Are any DTCs present in the PCM?
  
  Yes
  - For 16V, refer to 1.4L 16-VALVE - DIAGNOSTIC CODE INDEX - 500 . For 16V Turbo, refer to 1.4L 16-VALVE TURBO - DIAGNOSTIC CODE INDEX - 500 and perform the appropriate diagnostic procedure.
  No
  - Replace the BCM in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .