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Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  ACTIVE DTC 
    NOTE: Ensure that the engine oil is at the proper level. Also, check the customers oil change history to ensure that the oil is being changed at the correct intervals and that the proper oil viscosity is being used.

    Ignition on, engine not running.

    With a scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go To  2).

    No 

    1. Refer to INTERMITTENT CONDITION .
    2. Perform POWERTRAIN VERIFICATION TEST .
  2. 2)  ENGINE OIL PRESSURE SENSOR 
    Fig 1: Checking Engine Oil Pressure Sensor Signal Circuit
    GC0039859Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Connect the PCM harness connectors.

    Ignition on, engine not running.

    With a scan tool, monitor the Engine Oil Pressure Sensor voltage.

    Connect a jumper wire between the (K900) Sensor Ground circuit and the (G6) Engine Oil Pressure Signal circuit.

    NOTE: Engine Oil Pressure voltage should change from approximately 4.5 volts to less than 0.5 of a volt.

    Is the voltage reading within the listed specification when the jumper wire is installed? 

    Yes 

    1. Replace the Engine Oil Pressure Sensor.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go To  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3)  (G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT HIGH RESISTANCE 

    Turn the ignition off.

    CAUTION: 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 along with the 8815-1 to perform the diagnosis.

    Using a voltmeter perform a voltage drop test. Backprobe the (G6) Engine Oil Pressure Signal circuit at the Engine Oil Pressure Sensor harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are connected with the circuit's correct polarity.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    Start the engine and allow it to reach normal operating temperature.

    Monitor the voltmeter.

    Is the voltage below 0.5 volts? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the excessive resistance in the (G6) Engine Oil Pressure Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4)  (F856) 5-VOLT SUPPLY CIRCUIT HIGH RESISTANCE 

    Turn the ignition off.

    Perform a voltage drop test. Backprobe the (F856) 5-volt Supply circuit at the Engine Oil Pressure Sensor harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are connected with the circuit's correct polarity.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    Start the engine and allow it to reach normal operating temperature.

    Monitor the voltmeter.

    Is the voltage below 0.5 volts? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the excessive resistance in the (F856) 5-volt Supply circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5)   (K900) SENSOR GROUND CIRCUIT HIGH RESISTANCE 

    Turn the ignition off.

    Perform a voltage drop test. Backprobe the (K900) Sensor Return circuit at the Throttle Body harness connector to the appropriate terminal of the special tool #8815. Ensure the voltmeter leads are connected with the circuit's correct polarity.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    Start the engine and allow it to reach normal operating temperature.

    Monitor the voltmeter.

    Is the voltage below 0.5 volts? 

    Yes 

    1. Go To  6).

    No 

    1. Repair the excessive resistance in the (K900) Sensor Return circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  6. 6)  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 POWERTRAIN VERIFICATION TEST .

    No 

    1. Replace and program the Powertrain Control Module per Service Information.
    2. Perform POWERTRAIN VERIFICATION TEST .
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