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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 

    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)  POWER STEERING PRESSURE SWITCH 
    Fig 1: Checking Power Steering Pressure Switch Signal Circuit & Ground Circuit
    GC0015042Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the Power Steering Pressure Switch harness connector.

    Ignition on, engine not running.

    Connect a jumper wire to the (K66) P/S Switch Signal circuit at the Power Steering Pressure Switch harness connector.

    Use the scan tool to monitor the Power Steering Pressure Switch status.

    Touch the other end of the jumper wire to the (Z988) Ground circuit at the Power Steering Pressure Switch harness connector several times.

    Did the Power Steering Pressure Switch status change from High to Low when connecting and disconnecting the jumper wire? 

    Yes 

    1. Replace the Power Steering Pressure Switch.
    2. Perform POWERTRAIN VERIFICATION TEST .

    No 

    1. Go To  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3)  (K66) P/S SWITCH SIGNAL CIRCUIT HIGH RESISTANCE 

    Turn the ignition off.

    Disconnect the PCM harness connector.

    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 (K66) P/S Switch Signal circuit at the P/S Switch 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 high resistance in the (K66) P/S Switch Signal circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  4. 4)  (Z988) GROUND CIRCUIT OPEN 

    Turn the ignition off.

    Using a 12-volt test light connected to battery voltage, probe the (Z988) Ground circuit in the Power Steering Pressure Switch connector.

    NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the (Z988) Ground circuit.
    2. Perform POWERTRAIN VERIFICATION TEST .
  5. 5)  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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