Diagnostic Test

1) DTC IS ACTIVE
Turn the ignition on.

With the scan tool, select View DTCs and review the DTC environmental information.

Is the good trip counter greater than 0?

Yes
1. Refer to *CHECKING FOR AN INTERMITTENT DTC .
No
1. Go to 2).
2) (G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.

Disconnect the Oil Pressure Sensor connector.

Disconnect the Powertrain Control Module (PCM) connector.

Measure the resistance between ground and the (G6) Oil Pressure Signal circuit in the Oil Pressure Sensor harness connector.

Is the resistance above 100 ohms?

Yes
1. Go to 3).
No
1. Repair the (G6) Oil Pressure Signal circuit for a short to ground.
2. Perform PCM VERIFICATION TEST .
3) (G6) OIL PRESSURE SIGNAL CIRCUIT OPEN CIRCUIT OR HIGH RESISTANCE
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.

Measure the resistance of the (G6) Oil Pressure Signal circuit between the Oil Pressure Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go to 4).
No
1. Repair the (G6) Oil Pressure Signal circuit for an open circuit or high resistance.
2. Perform PCM VERIFICATION TEST .
4) OIL PRESSURE SENSOR
Turn the ignition off.

Connect the Powertrain Control Module (PCM) connector.

Turn the ignition on.

With the scan tool, read the Oil Pressure Sensor signal voltage.

NOTE: The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the connector disconnected.

Does the scan tool display the voltage as described above?

Yes
1. Replace the Oil Pressure Sensor in accordance with the service information.
2. Perform PCM VERIFICATION TEST .
No
1. Go to 5).
5) POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oil Pressure Sensor and the Powertrain Control Module (PCM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform PCM VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
2. Perform PCM VERIFICATION TEST .