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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Electric Vehicle Control Unit (EVCU) Module - DTCS P1139-00 To U1487-00 - 500 - Electric) >> DTC Troubleshooting >> P271D-00-Park Pawl Position Sensor 2 Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. 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 

  2. CHECK FOR OTHER DTCS 
    1. Read EVCU DTCs.

      Is P271D also set?

      Yes 

      • Check the (T192) sensor ground circuit for an open and repair as necessary.
      • Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE (T377) QUADRATURE SENSOR 2 CIRCUIT FOR A SHORT TO VOLTAGE 
    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. Turn the ignition on.
    5. Measure the voltage of the (T377) Quadrature Sensor 2 circuit on the appropriate terminal of the EVCU C1 harness connector.

      Is the voltage above 0.5 of a volt?

      Yes 

      • Repair the (T377) Quadrature Sensor 2 circuit for a short to voltage.
      • 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 .
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