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 IF DTC IS CURRENT
1. Using the scan tool, read EVCU DTCs.
2. Record the Environmental Data and any DTCs.
3. Clear DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. Read EVCU DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (T376) QUADRATURE SENSOR 1 SIGNAL AND FEEDBACK CIRCUIT FOR AN OPEN
1. Turn the ignition off. Remove the key from the Ignition Switch, close doors and allow the EVCU to shut down.
  NOTE:
  Allow up to two minutes for the EVCU to shut down. Opening the vehicle door will interrupt the shut down process.
2. Disconnect the EVCU C1 harness connector.
3. Disconnect the Park Pawl Motor harness connector.
4. Measure the resistance of the (T376) Quadrature Sensor 1 Signal and Feedback circuit between the appropriate terminal of the Park Pawl Motor harness connector and both terminals of the EVCU C1 harness connector.
  Is the resistance of the (T376) Quadrature Sensor 1 Signal or Feedback circuit above 5.0 Ohms?
  
  Yes
  - Repair the (T376) Quadrature Sensor 1 Signal or Feedback circuit for an open.
  - Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (T376) QUADRATURE SENSOR 1 SIGNAL AND FEEDBACK CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance of the (T376) Quadrature Sensor 1 Signal and Feedback circuit between ground and the appropriate terminals of the EVCU C1 harness connector.
  Is the resistance below 100k Ohms?
  
  Yes
  - Repair the (T376) Quadrature Sensor 1 Signal or Feedback circuit for a short to ground.
  - Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Park Pawl Motor pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Park Pawl Motor in accordance with the Service Information. Refer to MOTOR, PARK PAWL, REMOVAL . If DTC resets, check the Electric Vehicle Control Unit (EVCU) pins, terminals, and connectors for corrosion, damage, or terminal push out. If no problems are found, replace the EVCU in accordance with the Service Information. Refer to UNIT, ELECTRIC VEHICLE CONTROL (EVCU), REMOVAL .
  - Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .