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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0453: NVLD Pressure Switch Stuck Open >> Testing

DTC P0453: NVLD Pressure Switch Stuck Open: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine. Allow the engine to idle. Using the DRBIII® scan tool, perform the NVLD FORCED MONITOR TEST. Monitor the NVLD switch state. 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? If yes, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM. If no, go to next step.
  2. Turn the ignition off. Disconnect the NVLD assembly electrical harness connector. Ignition on, engine not running. Connect a jumper wire between the (K107) NVLD switch signal circuit and the (Z1) ground circuit in the NVLD harness connector. Monitor the NVLD switch state on the DRBIII® scan tool. Does the switch change from OPEN to CLOSED? If yes, replace the NVLD assembly. If no, go to next step.
    NOTE: Remove the jumper wire before continuing.
  3. Turn the ignition off. Disconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage on the (K107) NVLD switch signal circuit in the NVLD assembly electrical harness connector. Is the voltage above 5.3 volts? If yes, repair short to voltage in the (K107) NVLD switch signal circuit. If no, go to next step.
    4. 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 (8815) to perform diagnosis.
  4. Turn the ignition off. Measure the resistance of the (K107) NVLD switch signal circuit from the NVLD assembly electrical harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K107) NVLD switch signal circuit.
  5. Measure the resistance between the (K107) NVLD switch signal circuit and the (K106) NVLD solenoid control circuit in the NVLD assembly electrical harness connector. Is the resistance below 5.0 ohms? If yes, repair the (K107) NVLD switch signal circuit shorted to the (K106) NVLD solenoid control circuit. If no, go to next step.
  6. Measure the resistance between the (Z1) ground circuit and ground. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (Z1) ground circuit.
    7. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  7. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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