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Engine Oil Pressure Signal Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OIL PRESSURE SENSOR SIGNAL 
    1. Turn ignition switch ON.
    2. Check voltage between combination meter harness connector M24 terminal 20 (Y) and ground.
      Fig 1: Combination Meter Harness Connector And Ground, Voltage Specification Chart
      G02385806Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 20 (Y) And Ground
      G02385807Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK: GO TO 2.
    • NG: GO TO 3.
  2. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector M24 and oil pressure sensor connector F4.
    3. Check continuity between combination meter harness connector M24 terminal 16 (B/P) and oil pressure sensor harness connector F4 terminal 3 (B/P).
      • Continuity should exist. 
      Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 16 And Oil Pressure Sensor Harness Connector F4 Terminal 3
      G02385808Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK: Replace the combination meter. Refer to "COMBINATION METER ".
    • NG: Repair harness or connector.
  3. CHECK OIL PRESSURE SENSOR REFERENCE VOLTAGE 
    1. Turn ignition switch OFF.
    2. Disconnect oil pressure sensor connector F4.
    3. Turn ignition switch ON.
    4. Check voltage between combination meter harness connector M24 terminal 22 (GR/L) and ground.
      • Voltage: Approx. 5V 

    OK or NG

    Fig 4: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 22 (GR/L) And Ground
    G02385809Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK OIL PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector M24.
    3. Check continuity between combination meter harness connector M24 terminal 22 (GR/L) and oil pressure sensor harness connector F4 terminal 1 (GR/L).
      • Continuity should exist. 
    4. Check continuity between combination meter harness connector M24 terminal 22 (GR/L) and ground.
      • Continuity should not exist. 

    OK or NG

    • OK: GO TO 5.
    • NG: Repair harness or connector.
    Fig 5: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 22 And Oil Pressure Sensor Harness Connector F4 Terminal 1
    G02385810Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT 
    1. Check continuity between combination meter harness connector M24 terminal 20 (Y) and oil pressure sensor harness connector F4 terminal 2 (Y).
      • Continuity should exist. 
    2. Check continuity between combination meter harness connector M24 terminal 20 (Y) and ground.
      • Continuity should not exist. 

    OK or NG

    • OK: GO TO 6.
    • NG: Repair harness or connector.
    Fig 6: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 20 And Oil Pressure Sensor Harness Connector F4 Terminal 2
    G02385811Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT 

    Check continuity between combination meter harness connector M24 terminal 16 (B/P) and ground.

    • Continuity should not exist. 

    OK or NG

    • OK: Replace oil pressure sensor.
    • NG: Repair harness or connector.
    Fig 7: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 16 (B/P) And Ground
    G02385812Courtesy of NISSAN MOTOR CO., U.S.A.
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