Nissan Murano: Dtc/circuit Diagnosis / P0520 Eop Sensor

DTC Description

DTC DETECTION LOGIC

1. A voltage signal transmitted from the engine oil pressure sensor is lower than 0.26 V.

2. A voltage signal transmitted from the engine oil pressure sensor is higher than 4.9 V.

POSSIBLE CAUSE

• Harness or connectors

  (EOP sensor circuit is open or shorted)

  (APP sensor 2 circuit is shorted.)

  [CMP sensor (PAHSE) circuit is open or shorted.]

  (Refrigerant pressure sensor is shorted.)

• Engine oil temperature (EOP) sensor

• Accelerator pedal position sensor

  (APP sensor 2)

• Camshaft position (CMP) sensor (PHESE)

• Refrigerant pressure sensor

FAIL-SAFE

Not applicable

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

GO TO 2.

CHECK ENGINE OIL LEVEL

1. Turn ignition switch OFF.

2. Check engine oil level. Refer to Inspection.

Is inspection result normal?

GO TO 3.

Check engine oil leak. Refer to Inspection.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for at least 5 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

CHECK EOP SENSOR POWER SUPPLY-I

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Turn ignition switch ON.

4. Check the voltage between EOP sensor harness connector terminals.

   EOP sensor			Voltage (Approx.)
   Connector	+	−
   	terminal
   F87	3	1	5 V

Is the inspection result normal?

GO TO 2.

GO TO 4.

CHECK EOP SENSOR SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connectors.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F87	2	F78	14	Existed

4. Also check harness for short to ground and short to power.

Is the inspection result normal?

GO TO 3.

Repair or replace error-detected parts.

CHECK EOP SENSOR

Check EOP sensor. Refer to Component Inspection.

Is the inspection result normal?

INSPECTION END

Repair or replace error-detected parts.

CHECK EOP SENSOR POWER SUPPLY-II

Check the voltage between EOP sensor harness connector terminal and ground.

Is the inspection result normal?

GO TO 6.

GO TO 5.

CHECK EOP SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connectors.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F87	3	F78	18	Existed

4. Also check harness for short to ground and short to power.

Is the inspection result normal?

Check sensor power supply 2 circuit. Refer to Diagnosis Procedure.

Repair or replace error-detected parts.

CHECK EOP SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F87	1	F78	15	Existed

Is the inspection result normal?

GO TO 7.

Repair or replace error-detected parts.

CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and ground.

Is the inspection result normal?

INSPECTION END

Repair or replace error-detected parts.

CHECK EOP SENSOR

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Check resistance between EOP sensor connector terminals.

   EOP sensor		Condition	Resistance (kΩ)
   +	−
   Terminal
   1	2	None	4 – 10
   	3		2 – 8
   2	1		4 – 10
   	3		1 – 3
   3	1		2 – 8
   	2		1 – 3

Is the inspection result normal?

INSPECTION END.

Replace EOP sensor. Refer to Component Parts Location.