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.

UNDERCHARGED BATTERY
NOTE:
Diagnose any 5-Volt Supply DTCs before continuing

NOTE:
The Battery must be fully charged and in good condition. An undercharged Battery may produce invalid test results.
1. Test the battery in accordance with the Service Information.
  Were any problems found?
  
  Yes
  - Charge or replace the Battery as necessary and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 2
OPEN FUSE(S)
1. Inspect all of the fuses in the Fuse Panel. If any open fuses are found, check the related circuit(s) for a short to ground or high resistance.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 3
SYSTEM DTCS PRESENT
1. With the scan tool, select System DTCs to read DTCs in all modules. If any DTCs are present, perform the appropriate diagnostic procedure before continuing with this test. If a no response condition is detected in any module, perform the appropriate No Response diagnostic procedure.
  Were any problems found?
  
  Yes
  - Perform the appropriate diagnostic procedure and repair as necessary. If any pending DTCs are detected, perform the diagnostic procedure as if the DTC is active.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 4
PCM POWER OR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
1. Perform the CHECKING THE PCM POWER AND GROUND CIRCUIT test procedure. Refer to CHECKING THE PCM POWER AND GROUND CIRCUITS .
  Were any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 5
CHECKING THE FUEL DELIVERY SYSTEM
NOTE:
Verify that the fuel tank is not empty before continuing.
1. Perform the CHECKING THE FUEL DELIVERY SYSTEM test procedure. Refer to CHECKING THE FUEL DELIVERY SYSTEM (HARD START) .
  Were any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 6
FUEL CONTAMINATION
1. Check the fuel system for contamination in accordance with the Service Information.
  Was any evidence of fuel contamination found?
  
  Yes
  - Clean and repair the fuel system as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 7
CHECKING THE IGNITION COIL OPERATION
1. Perform the diagnostic procedure for CHECKING THE IGNITION COIL OPERATION. Refer to CHECKING THE IGNITION COIL OPERATION .
  Were any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Go To 8
CHECKING THE ENGINE MECHANICAL SYSTEM
1. Perform the diagnostic procedure for CHECKING THE ENGINE MECHANICAL SYSTEM. Refer to CHECKING THE ENGINE MECHANICAL SYSTEM .
  Were any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance. For 16V, refer to POWERTRAIN VERIFICATION TEST, 16V . For 16V Turbo, refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Test complete. Perform any Service Bulletins that may apply.