Nissan Sentra B18 (2020-2025) Service Manual: P0520 Eop Sensor

Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

  • EOP sensor circuit is open or shorted.

  • Sensor power supply 2 circuit is shorted.

• EOP sensor

• Each sensor, connected with sensor power supply 2 circuit

FAIL-SAFE

Not applicable

Confirmation Procedure

1. PRECONDITIONING

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

   >>

   GO TO 2.

2. CHECK ENGINE OIL LEVEL

   Check engine oil level. Refer to Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Perform Inspection.

3. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start the engine and let it idle for 5 second.

   2. Check DTC.

   Is DTC detected?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

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

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

1. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-1

   1. Turn ignition switch OFF.

   2. Disconnect engine oil pressure (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
      F2	3	1	5 V

   Is the inspection result normal?

   YES >>

   GO TO 7.

   NO >>

   GO TO 2.

2. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-2

   Check the voltage between EOP sensor harness connector and ground.

   +		−	Voltage (Approx.)
   EOP sensor
   Connector	Terminal
   F2	3	Ground	5 V

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   GO TO 3.

3. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-3

   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
      F2	3	F24	43	Existed

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Repair or replace malfunctioning part.

4. CHECK SENSOR POWER SUPPLY 2 CIRCUIT

   Refer to Diagnosis Procedure.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace malfunctioning part.

5. 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
      F2	1	F24	45	Existed

   Is the inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   Repair or replace malfunctioning part.

6. CHECK ECM GROUND CIRCUIT

   1. Check the continuity between ECM harness connector and ground.

      ECM		—	Continuity
      Connector	Terminal
      F24	5	Ground	Existed
      	65
      F25	69
      E16	157
      	159
      	162

   2. Also check harness for short to power.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace malfunctioning part.

7. CHECK EOP SENSOR INPUT SIGNAL 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
      F2	2	F24	46	Existed

   4. Also check harness for short to power.

   Is the inspection result normal?

   YES >>

   GO TO 8.

   NO >>

   Repair or replace malfunctioning part.

8. CHECK EOP SENSOR

   Check EOP sensor. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace EOP sensor. Refer to Exploded View.

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