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
- Turn the ignition on.
- With the scan tool, read active DTCs.NOTE:
If the vehicle is equipped with a manual transmission, this DTC will be set anytime a PCM is replaced, a PCM is flashed, or a certain type of PCM reset is performed. The DTC will remain active until the PCM receives an input from the clutch pedal, press and hold the clutch pedal for a few seconds and the DTC will change to pending and then stored upon a key cycle.
Is this DTC active?
Yes
- Go To 2
No
- Go To 3
- VERIFY IF THIS DTC SET IN OTHER MODULES
- Turn the ignition on.
- With the scan tool, read DTCs present for all modules.
Are any other modules on the CAN BUS reporting communication DTCs against the TCM?
Yes
- Replace and program the Transmission Control Module (TCM) in accordance with the Service Information. Refer to MODULE, TRANSMISSION CONTROL, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
No
- Replace and program the Powertrain Control Module in accordance to the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- CHECK THE WIRING AND CONNECTORS
- The conditions necessary to set the DTC are not present at this time.
- With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.
- 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.
- Wiggle the wiring and connectors while checking for shorted and open circuits.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
No
- Test complete.