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.
- VERIFY DTC IS ACTIVE NOTE:
Make sure the battery voltage is between 10 and 16 volts before proceeding.
- With the scan tool, read active DTCs.
Is this DTC active?
Yes
- Go To 2
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.
- With the scan tool, read active DTCs.
- CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
- With the scan tool, read all active DTCs from all modules.NOTE:
Check for BCM configuration, CAN B Bus hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
Does the scan tool display any active DTCs to the conditions listed above?
Yes
- Go to and perform the appropriate diagnostic procedure.
No
- Go To 3
- With the scan tool, read all active DTCs from all modules.
- VERIFY THE TPM IS ACTIVE ON THE BUS
- Turn the ignition on.
- With the scan tool, verify the TPM is active on the bus.
Is the TPM active on the bus?
Yes
- Go To 4
No
- Refer to NO RESPONSE FROM TPM (TIRE PRESSURE MONITORING) MODULE and perform the NO RESPONSE FROM TPM diagnostic procedure.
- CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
- With the scan tool, read all the DTCs.
Is there more than one module with active DTCs "Logged Against" the TPM?
Yes
- Replace/update the TPM in accordance with the Service Information. Refer to MODULE, TIRE PRESSURE MONITORING (TPM), REMOVAL .
- Perform the TPM VERIFICATION TEST. Refer to STANDARD PROCEDURE - TPM VERIFICATION .
No
- Go To 5
- With the scan tool, read all the DTCs.
- CLEAR DTC IN MODULE SETTING FAULT
- With the scan tool, select the module setting the DTC against the TPM.
- Clear active DTCs.
Is this DTC still active?
Yes
- Replace/update the module that set this DTC in accordance with the Service Information.
- Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - ELECTRIC .
No
- The condition is 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 appropriate verification test for the module. If there is no verification test for the associated module Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - ELECTRIC .