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:
Diagnose any Can C or Can B failures before continuing.

NOTE:
An external Radio-Frequency Identification (RFID) key (and/or pass/radio key), such as one used to gain access to a 24 hour gym, can cause this DTC to set and create a no start condition. Inspect the customer's key chain for any type of RFID key. If one is not found, question the customer to see if a spare key chain has this RFID key on it or if it was removed from the original key chain before the vehicle was released for service. If a RFID key is present, remove the ignition key from the vehicle and remove the RFID key from the key chain.
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Go To 6
IMPLAUSIBLE OR INVALID DATA RECEIVED FROM VEHICLE SECURITY CONTROL MODULE
1. With the scan tool, attempt to communicate with the BCM.
  Can the scan tool communicate with the BCM?
  
  Yes
  - Go To 3
  No
  - Refer to NO RESPONSE FROM BCM (BODY CONTROL MODULE) and perform the No Response from BCM diagnostic procedure.
BODY CONTROL MODULE (BCM) TROUBLE CODES SET
1. With the scan tool, check for BCM DTCs.
  Are any DTCs present in the BCM?
  
  Yes
  - Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX - 500 - EXCEPT ELECTRIC and perform the appropriate diagnostic procedure.
  No
  - Go To 4
VIN PROGRAMMED INTO PCM
1. With the scan tool, display the VIN that is programmed in the PCM.
  Has a VIN been programmed into the PCM?
  
  Yes
  - Go To 5
  No
  - Program the correct VIN into the PCM and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK RELATED PCM AND COMPONENT CONNECTIONS
1. Perform any Service Bulletins that apply.
2. Disconnect all PCM harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
11. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  - Test complete.
IGNITION KEY
NOTE:
You must obtain the transponder identification code.

NOTE:
This DTC could have been set if the RF Hub harness connector was disconnected or if the RF Hub was replaced recently.

NOTE:
All keys that the customer uses for this vehicle must be tested to verify they are operating properly.
1. Turn the ignition on.
2. Verify the correct VIN is programmed into the PCM and Body Control Module (BCM).
3. Turn the ignition off.
4. With each customer key turn the ignition key on and crank the engine to start.
5. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Ignition Key causing the DTC to set.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Test Complete.
    NOTE:
    If this DTC cannot be reset, it could have been an actual theft attempt.