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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (6.4L - DTCS P0522 To P1521) >> Diagnosis And Testing >> P0524-Engine Oil Pressure Too Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  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.

    1. 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 possible serious or fatal injury.

    2. With the scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2.

      No 

      • Refer to STANDARD PROCEDURE and perform the INTERMITTENT CONDITION diagnostic procedure.
  2. ENGINE OIL/ENGINE MECHANICAL 
    NOTE:

    The following items must be considered before determining the cause of this DTC. Failure to do so may lead to misdiagnosis.

    For the MDS to enable the 4 cylinder mode, the oil pressure has to be approximately 25 psi.

    For the MDS to remain enabled in the 4 cylinder mode the engine oil pressure can not drop below 23.2 psi.

    When checking the engine oil pressure use a mechanical gauge.

    • ENGINE MECHANICAL TOLERANCES OUT OF SPECIFICATION
    • ENGINE OIL PRESSURE OUT OF SPECIFICATION
    • LOW ENGINE OIL
    • DETERIORATED OR DIRTY OIL
    • CORRECT VISCOSITY
    • ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)
    1. If any of the above conditions are found, repair as necessary.

      Were any of the above conditions present?

      Yes 

      • Repair as necessary.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  3.
  3. ENGINE OIL PRESSURE SENSOR 
    Fig 1: Checking Engine Oil Pressure Sensor Signal & Ground Circuit
    GC0149086Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Connect the C2 PCM harness connector.
    3. Ignition on, engine not running.
    4. With the scan tool, monitor the Engine Oil Pressure Sensor voltage.
    5. 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 

      • Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. Remove the Engine Oil Pressure sensor and ensure the oil passage/port is free from any blockage. If OK, replace the Engine Oil Pressure Sensor.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  4.
        NOTE:

        Remove the jumper wire before continuing.

  4. EXCESSIVE RESISTANCE IN THE (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT 
    Fig 2: Checking Engine Oil Pressure Signal Circuit For An Open Or Excessive Resistance
    GC0150132Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (G6) Engine Oil Pressure Signal circuit from the Engine Oil Pressure Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

  5. (G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 3: Checking Engine Oil Pressure Signal Circuit For Short To Ground
    GC0149088Courtesy of CHRYSLER GROUP, LLC
    1. 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.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  6.
  6. EXCESSIVE RESISTANCE IN THE (K855) 5 VOLT SUPPLY CIRCUIT 
    Fig 4: Checking For Excessive Resistance In 5 Volt Supply Circuit
    GC0142154Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (K855) 5 Volt Supply circuit from the Engine Oil Pressure Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

      • Repair the excessive resistance in the (K855) 5 Volt Supply circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  7. (K855) 5 VOLT SUPPLY SHORTED TO GROUND 
    Fig 5: Checking 5 Volt Supply For Short To Ground
    GC0142155Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K855) 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 (K855) 5 Volt Supply circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  8.
  8. EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT 
    Fig 6: Checking Engine Oil Pressure Ground Circuit For An Open Or Excessive Resistance
    GC0150148Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (K900) Sensor Ground circuit from the Engine Oil Pressure Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  9.

      No 

      • Repair the excessive resistance in the (K900) Sensor Ground circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  9. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Engine Oil Pressure Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

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