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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.4L Engine - DTCS P0335 To P0508 >> Diagnosis And Testing >> P0453-NVLD Pressure Switch Stuck Open >> Diagnostic Test

Diagnostic Test

  1. 1)  NVLD SWITCH OPERATION 

    Start the engine.

    Allow the engine to idle.

    Using a scan tool, perform the NVLD FORCED MONITOR TEST.

    Monitor the NVLD Switch state.

    NOTE: As the test runs, the NVLD Switch should go from an OPEN state to a CLOSED state and then return to OPEN when the test is complete.

    Did the NVLD Switch operate as described above? 

    Yes 

    1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  2).
  2. 2)  NVLD ASSEMBLY 

    Turn the ignition off.

    Disconnect the NVLD electrical harness connector.

    Ignition on, engine not running.

    Monitor the NVLD Switch state on the scan tool.

    Connect a jumper wire between the (K107) NVLD Switch Signal circuit and the (Z904) Ground circuit in the NVLD harness connector.

    Does the Switch change from OPEN to CLOSED with the jumper wire installed? 

    Yes 

    1. Replace the NVLD Assembly.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3)  (K107) NVLD SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE 

    1

    Turn the ignition off.

    Disconnect the C3 PCM harness connector.

    Ignition on, engine not running.

    Measure the voltage on the (K107) NVLD Switch Signal circuit in the NVLD electrical harness connector.

    Is the voltage above 0 volts? 

    Yes 

    1. Repair the short to battery voltage in the (K107) NVLD Switch Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  4).
  4. 4)  (K107) NVLD SWITCH SIGNAL CIRCUIT OPEN 
    Fig 1: MEASURING RESISTANCE OF THE NVLD SWITCH SIGNAL CIRCUIT
    GC0041658Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    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 Miller Special Tool No. 8815 to perform diagnosis.

    Measure the resistance of the (K107) NVLD Switch Signal circuit from the NVLD electrical harness connector to the appropriate terminal of special tool No. 8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the open in the (K107) NVLD Switch Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  5. 5)  (K107) NVLD SWITCH SIGNAL CIRCUIT SHORTED TO THE (K106) NVLD SOLENOID CONTROL CIRCUIT 
    Fig 2: MEASURING RESISTANCE BETWEEN THE NVLD SWITCH SIGNAL CIRCUIT AND NVLD SOLENOID CONTROL CIRCUIT
    GC0041666Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between the (K107) NVLD Switch Signal circuit and the (K106) NVLD Solenoid Control circuit in the NVLD electrical harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the short between the (K107) NVLD Switch Signal circuit and the (K106) NVLD Solenoid Control circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  6).
  6. 6)  (Z904) GROUND CIRCUIT OPEN 
    Fig 3: MEASURING RESISTANCE BETWEEN THE GROUND CIRCUIT AND GROUND
    GC0041657Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between the (Z904) Ground circuit and ground.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  7).

    No 

    1. Repair the open in the (Z904) Ground circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  7. 7)  PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE-POWERTRAIN CONTROL and STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
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