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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Combination Meters >> Engine Oil Pressure Signal Inspection

Engine Oil Pressure Signal Inspection

  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: Terminal Voltage Table
      G02406875Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Checking Voltage Between Combination Meter Harness Connector And Ground
      G02406876Courtesy 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. 

    OK or NG 

    • OK: Replace the combination meter. Refer to COMBINATION METER .
    • NG: Repair harness or connector.
      Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 16 And Oil Pressure Sensor Harness Connector Terminal 3
      G02406877Courtesy of NISSAN MOTOR CO., U.S.A.
  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 

    • OK: GO TO 4.
    • NG: Replace the combination meter. Refer to COMBINATION METER .
      Fig 4: Checking Voltage Between Combination Meter Harness Connector And Ground
      G02406878Courtesy 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 And Ground
      G02406879Courtesy 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 And Ground
        G02406880Courtesy of NISSAN MOTOR CO., U.S.A.
    3. 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 And Ground
        G02406881Courtesy of NISSAN MOTOR CO., U.S.A.
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