5.7L

P0522-ENGINE OIL PRESSURE SENSOR CIRCUIT LOW 5.7L





For a complete wiring diagram Refer to Diagrams/Electrical.


- When Monitored:
With the ignition on. Battery voltage greater than 10 volts.

- Set Condition:
The Oil pressure signal is below the calibrated amount. One Trip Fault. Three good trips to turn off the MIL. ETC light will illuminate.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview .


Diagnostic Test


1. ACTIVE DTC
NOTE: Make sure 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.

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

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.


NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.

Is the DTC Active at this time?

Yes


- Go To 2


No


- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition



2. (F855) 5-VOLT SUPPLY CIRCUIT




Turn the ignition off.
Disconnect the Engine Oil Pressure Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the (F855) 5-volt Supply circuit in the Engine Oil Pressure Sensor harness connector.
Is the voltage between 4.8 to 5.2 volts?

Yes


- Go To 3


No


- Go To 7



3. ENGINE OIL PRESSURE SENSOR
With the scan tool, read the Engine 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


- Verify that there is good pin to terminal contact in the Oil Pressure Sensor and the Powertrain Control Module connectors. Replace the Engine Oil Pressure Sensor if no problems were found with the connectors.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Go To 4



4. (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND




Turn the ignition off.
Disconnect the C1 and C2 PCM harness connectors.
Measure the resistance between ground and the (G6) Engine Oil Pressure Signal circuit in the Engine Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?

Yes


- Repair the short to ground in the (G6) Engine Oil Pressure Signal circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Go To 5



5. (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT




Measure the resistance between the (G6) Engine Oil Pressure Sensor Signal circuit and the (K900) Sensor Ground circuit in the Engine Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?

Yes


- Repair the short between the (K900) Sensor Ground circuit and the (G6) Engine Oil Pressure Signal circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Go To 6



6. EXCESSIVE RESISTANCE IN THE (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT




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) Engine Oil Pressure Signal circuit from the Engine Oil Pressure Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

Yes


- Go To 9


No


- Repair the excessive resistance in the (G6) Engine Oil Pressure Signal circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test



7. (F855) 5-VOLT SUPPLY CIRCUIT OPEN




Turn the ignition off.
Disconnect the C2 PCM harness connector.

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 diagnostics.

Measure the resistance of the (F855) 5-volt Supply circuit from the Engine Oil Pressure Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

Yes


- Go To 8


No


- Repair the open in the (F855) 5-volt Supply circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test



8. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND




Measure the resistance between ground and the (F855) 5-volt Supply circuit in the Engine Oil Pressure Sensor harness connector.
Is the resistance below 100 ohms?

Yes


- Repair the short to ground in the (F855) 5-volt Supply circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Go To 9



9. POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related 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. Verify that there is good pin to terminal contact in the Oil Pressure Sensor and the Powertrain Control Module connectors.
Refer to any Technical Service Bulletins that may apply.
Were there any problems found?

Yes


- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test