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.

ACTIVE DTC
NOTE:
If there are any Electric Coolant Pump Relay Control circuit, ASD/Main Relay or system voltage DTCs present, diagnose those DTCs before proceeding with this test procedure.
1. Turn the ignition on, engine not running.
2. With the scan tool, select View DTCs. Copy DTC and Freeze Frame information and clear DTCs.
  NOTE:
  Active or pending DTCs may not allow Electric Coolant Pump Relay actuation, make sure all DTCs are cleared before proceeding with this test procedure.
3. With the scan tool, actuate the Electric Coolant Pump Relay.
4. With the scan tool, select View DTCs.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (Z910) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the Electric Coolant Pump harness connector.
3. Measure the resistance between ground and the (Z910) Ground circuit at the Electric Coolant Pump harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (Z910) Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
ELECTRIC COOLANT PUMP
1. Replace the Electric Coolant Pump in accordance with the service information.
2. Turn the ignition on, engine not running.
3. With the scan tool, erase DTCs.
  NOTE:
  Active or pending DTCs may not allow Electric Coolant Pump Relay actuation, make sure all DTCs are cleared before proceeding with this test procedure.
4. With the scan tool, actuate the Electric Coolant Pump Relay.
5. With the scan tool, select View DTCs.
  Did the DTC return as active or pending?
  
  Yes
  - Go To 4
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Electric Coolant Pump and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 16V Turbo .