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Oil Pressure Sensor Inspection

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

Symptom: Indication is malfunction of oil pressure gauge.

  1. CHECK OIL PRESSURE SENSOR SIGNAL 
    1. Turn ignition switch ON.
    2. Check voltage between triple meter harness connector M44 terminal 8 (LG/R) and ground.
      • 8 (LG/R) - Ground 
      • When ignition switch is in ON : Approx. 1 V position (Engine stopped.) 
      • Engine running [When the oil : Approx. 3 V pressure is 80 psi (500 kpa)] 
      Fig 1: Triple Meter Harness Connector M44 Terminal 8 (LG/R) & Ground Voltage Test
      G02406007Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : Replace triple meter.
    • NG : GO TO 2.
  2. CHECK OIL PRESSURE SENSOR POWER SUPPLY 

    Check voltage between triple meter harness connector M44 terminal 9 (R/L) and ground.

    • 9 (R/L) - Ground : Approx. 5 V 

    OK or NG 

    • OK : GO TO 3.
    • NG : Replace triple meter.
    Fig 2: Triple Meter Harness Connector M44 Terminal 9 (R/L) & Ground Voltage Test
    G02406008Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK OIL PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect triple meter and oil pressure switch connector.
    3. Check continuity between triple meter harness connector M44 terminal 9 (R/L) and oil pressure sensor harness connector F21 terminal 1 (R/L).
      • 9 (R/L) - 1 (R/L) : Continuity should exist. 
    4. Check continuity between triple meter harness connector M44 terminal 9 (R/L) and ground.
      • 9 (R/L) - Ground : Continuity should not exist. 
      Fig 3: Triple Meter Harness Connector M44 Terminal 9 (R/L) & Oil Pressure Sensor Harness Connector F21 Terminal 1 (R/L) Continuity Test
      G02406009Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 4.
    • NG : Repair harness or connector.
  4. CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT 
    1. Check continuity between triple meter harness connector M44 terminal 8 (LG/R) and oil pressure sensor harness connector F21 terminal 2 (G).
      • 8 (LG/R) - 2 (G) : Continuity should exist. 
    2. Check continuity between triple meter harness connector M44 terminal 8 (LG/R) and ground.
      • 8 (LG/R) - Ground : Continuity should not exist. 
      Fig 4: Triple Meter Harness Connector M44 Terminal 8 (LG/R) & Oil Pressure Sensor Harness Connector F21 Terminal 2 (G) Continuity Test
      G02406010Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 5.
    • NG : Repair harness or connector.
  5. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT 

    Check continuity between triple meter harness connector M44 terminal 7 (G/OR) and oil pressure sensor harness connector F21 terminal 3 (B).

    • 7 (G/OR) - 3 (B) : Continuity should exist. 

    OK or NG 

    • OK : Replace oil pressure sensor.
    • NG : Repair harness or connector.
    Fig 5: Triple Meter Harness Connector M44 Terminal 7 (G/Or) & Oil Pressure Sensor Harness Connector F21 Terminal 3 (B) Continuity Test
    G02406011Courtesy of NISSAN MOTOR CO., U.S.A.
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