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 ACTIVE DTC
- Turn the ignition on.
- 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 - ELECTRIC .
- CHECK THE ELECTRIC VEHICLE CONTROL UNIT (EVCU)
- Turn the ignition off.
- Disconnect the EVCU C3 harness connector.
- Turn the ignition on.
- With the scan tool, read DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 3
No
- Replace the Electric Vehicle Control Unit in accordance with the Service Information. Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Electric Vehicle Control Unit (EVCU)/Removal.
- Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - ELECTRIC .
- CHECK THE (H31) ELECTRIC VEHICLE CONTROL UNIT (EVCU) WAKE UP SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Turn the ignition off.
- Disconnect the BCM C3 harness connector.
- Measure the resistance between ground and the (H31) Electric Vehicle Control Unit Wake Up Signal circuit.
Is the resistance above 10K Ohms?
Yes
- 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 - ELECTRIC .
No
- Repair the short to ground in the (H31) Electric Vehicle Control Unit Wake Up Signal circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - ELECTRIC .