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Home >> Fiat >> 2013 >> 500e >> Repair and Diagnosis >> Engine Performance >> System >> Electric Vehicle Control Unit (EVCU) Module - DTCS P1139 To U1487 - 500E >> Diagnosis And Testing >> P1CDC-Hybrid/EV WAKEUP Control 1 Output Circuit Short To Ground >> Diagnostic Test

Diagnostic Test

  1. CHECK IF THE DTC RESETS 
    1. Turn the ignition on.
    2. With the scan tool, erase Electric Vehicle Control Unit EVCU DTCs.
    3. 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.

    4. Turn the ignition on.
    5. With the scan tool, read EVCU DTCs.

      Does this DTC reset?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (H32) MASTER EV WAKE-UP CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off. Remove the key from the Ignition Switch, close doors and allow the EVCU to shut down.
    2. Disconnect the EVCU C2 harness connector
    3. Measure the resistance between ground and the (H32) Master EV Wake-up circuit in the EVCU C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (H32) Master EV Wake-up circuit for a short to ground.
      • Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. ELECTRIC VEHICLE CONTROL UNIT (EVCU) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the PIM, BPCM, OBCM and the Electric Vehicle Control Unit (EVCU).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No