Engine Oil Pressure Signal Inspection

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

CHECK OIL PRESSURE SENSOR SIGNAL

Turn ignition switch ON.

Check voltage between combination meter harness connector M24 terminal 19 and ground.

TERMINALS VOLTAGE CHART

Terminals			Condition	Voltage (V)
(+)		(-)
Connector	Terminal	(-)
M24	19	Ground	When ignition switch is in ON position. (Engine stopped)	Yes
M24	19	Ground	Engine running. (Idle speed)	No

Fig 1: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 19 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : GO TO 2.
NG : GO TO 3.

CHECK OIL PRESSURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector M24 and oil pressure sensor connector E208.
3. Check continuity between combination meter harness connector M24 terminal 10 and oil pressure sensor harness connector E208 terminal 3.
  Continuity should exist.
OK or NG
1. OK : Replace the combination meter. Refer to "COMBINATION METER ".
2. NG : Repair harness or connector.
  
  Fig 2: Checking Continuity Between Combination Meter Terminal 10 And Oil Pressure Sensor E208 Terminal 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OIL PRESSURE SENSOR REFERENCE VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect oil pressure sensor connector E208.
3. Turn ignition switch ON.
4. Check voltage between combination meter harness connector M24 terminal 8 and ground.
  Voltage : Approx. 5V
OK or NG
1. OK : GO TO 4.
2. NG : Replace the combination meter. Refer to "COMBINATION METER ".
  
  Fig 3: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 8 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 8 and oil pressure sensor harness connector E208 terminal 1.
  Continuity should exist.
4. Check continuity between combination meter harness connector M24 terminal 8 and ground.
  Continuity should not exist.
OK or NG
1. OK : GO TO 5.
2. NG : Repair harness or connector.
  
  Fig 4: Checking Continuity Between Combination Meter M24 Terminal 8 And Oil Pressure Sensor E208 Terminal 1
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT
1. Check continuity between combination meter harness connector M24 terminal 19 and oil pressure sensor harness connector E208 terminal 2.
  Continuity should exist.
2. Check continuity between combination meter harness connector M24 terminal 19 and ground.
  Continuity should not exist.
OK or NG
1. OK : GO TO 6.
2. NG : Repair harness or connector.
  
  Fig 5: Checking Continuity Between Combination Meter M24 Terminal 19 And Oil Pressure Sensor E208 Terminal 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OIL PRESSURE SENSOR GROUND CIRCUIT
Check continuity between combination meter harness connector M24 terminal 10 and ground.

Continuity should not exist.

OK or NG
1. OK : Replace oil pressure sensor.
2. NG : Repair harness or connector.
  
  Fig 6: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 10 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.