P0520

P0520 EOP SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. 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.

2. CHECK ENGINE OIL LEVEL

1.Turn ignition switch OFF.
2.Check engine oil level. Refer to "Inspection" Procedures.
Is inspection result normal?
YES- GO TO 3.
NO- Check engine oil leak. Refer to "Inspection" Procedures.

3. 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?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. 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.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.
Revision: March 20122013 Infiniti JX

2. 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.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 3.
NO - Repair or replace error-detected parts.

3. CHECK EOP SENSOR

Check EOP sensor. Refer to "Component Inspection" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace error-detected parts.

4. CHECK EOP SENSOR POWER SUPPLY-II

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





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 5.

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.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 6.
NO - Repair or replace error-detected parts.

6. CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Check sensor power supply 2 circuit. Refer to "Diagnosis Procedure" Testing and Inspection.
Is inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

7. CHECK EOP SENSOR GROUND CIRCUIT

Revision: March 20122013 Infiniti JX
1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between EOP sensor harness connector and ECM harness connector.





Is the inspection result normal?
YES- GO TO 8.
NO - Repair or replace error-detected parts.

8. CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and ground.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO - Repair or replace error-detected parts.


Component Inspection


1. CHECK EOP SENSOR

1.Turn ignition switch OFF.
2.Disconnect EOP sensor harness connector.
3.Check resistance between EOP sensor connector terminals.





Is the inspection result normal?
YES- INSPECTION END.
NO- Replace EOP sensor. Refer to "ENGINE CONTROL SYSTEM : Component Parts Location" Engine Control System.
Revision: March 20122013 Infiniti JX