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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1297 (2.4L - DTCS P0645 To P1300) >> DTC Troubleshooting >> P1037-Cylinder 1 Oil Supply Solenoid Valve Driver Short To Ground >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. Start the engine and allow it to idle.
    2. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR INFORMATION RELATED TO THIS DTC 
    1. Check for related Service Bulletins and any other official OEM documentation related to this DTC.

      Were any related Service Bulletins or official OEM documentation related to this DTC available?

      Yes 

      • Repair the condition by performing the related procedures outlined in the Service Bulletin or official OEM documentation.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE ENTIRE VVA SOLENOID 1 CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    3. Connect the (special tool #10436, Adapter, GPEC Diagnostic) to the PCM C2 harness connector and the PCM.
    4. Check for continuity between ground and either the (N32) VVA Solenoid 1 Signal circuit or the (N33) VVA Solenoid 1 Return circuit at the GPEC Adaptor.
      NOTE:

      This step is a quick check to test for a short to ground on both circuits and the solenoid.

      Is there continuity between ground and the VVA Solenoid circuit?

      Yes 

      • Go To  4

      No 

      • Go To  7
  4. CHECK THE (N32) VVA SOLENOID 1 SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Disconnect the VVA Solenoid 1 harness connector.
    2. Check for continuity between ground and the (N32) VVA Solenoid 1 Signal circuit at the GPEC Adaptor.

      Is there continuity between ground and the (N32) VVA Solenoid 1 Signal circuit?

      Yes 

      • Repair the (N32) VVA Solenoid 1 Signal circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (N33) VVA SOLENOID 1 RETURN CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (N33) VVA Solenoid 1 Return circuit at the GPEC Adaptor.

      Is there continuity between ground and the (N33) VVA Solenoid 1 Return circuit?

      Yes 

      • Repair the (N33) VVA Solenoid 1 Return circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE VVA SOLENOID FOR PROPER OPERATION 
    1. Check for continuity between ground and either terminal of the VVA Solenoid (component side).

      Is there continuity between ground and either terminal of the VVA Solenoid?

      Yes 

      • Replace the Variable Valve Actuator Assembly in accordance with the Service Information. Refer to ASSEMBLY, VARIABLE VALVE ACTUATION, REMOVAL AND INSTALLATION . After replacing the Variable Valve Actuator Assembly, perform the "Reset VCM Adaptives" procedure with the scan tool. This function should be run after a VVA Actuator has been installed to prevent a false failure by resetting the adaptive memory back to the base calibration.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Repair the intermittent short to ground (this is the most likely cause of this DTC). Check for and repair any chafed, pierced, pinched or partially broken wires between the VVA Solenoid and PCM.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE RESISTANCE OF THE VVA DRIVER INSIDE THE PCM 
    NOTE:

    The ignition must be off during this test step.

    1. Turn the ignition off.
    2. Remove the GPEC Adaptor from the PCM C2 harness connector only.
    3. Measure the resistance of the PCM driver across the terminals of the (N32) VVA Solenoid 1 Signal circuit and the (N33) VVA Solenoid 1 Return circuit at the GPEC Adaptor.
      NOTE:

      The normal resistance across the driver circuits in the PCM should be between 15k - 16k Ohms.

      Is the VVA driver resistance between 15k and 16k Ohms?

      Yes 

      • Repair the intermittent short to ground (this is the most likely cause of this DTC). Check for any chafed, pierced, pinched or partially broken wires between the VVA Solenoid and PCM. Check for and perform any Service Bulletins that may apply.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

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