Nissan Sentra Service Manual: P0520 EOP System
DTC Logic
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
| P0520 | EOP SENSOR/SWITCH (Engine oil pressure sensor/ switch circuit) | ECM detects the following status continuously
for 5 seconds or more:
|
|
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.CHECK ENGINE OIL LEVEL
- Turn ignition switch OFF.
- Check engine oil level. Refer to LU-7, "Inspection".
Is inspection result normal? YES >> GO TO 3.
NO >> Check engine oil leak. Refer to LU-6, "Engine Lubrication System Schematic".
3.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine and let it idle for at least 5 seconds.
- Check 1st trip DTC.
Is 1st trip DTC detected? YES >> Proceed to EC-340, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK EOP SENSOR POWER SUPPLY CIRCUIT-1
- Turn ignition switch OFF.
- Disconnect EOP sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between EOP sensor harness connector terminals.
Is the inspection result normal? YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK EOP SENSOR SIGNAL CIRCUIT
- Turn ignition switch OFF
- Disconnect ECM harness connectors.
- Check the continuity between EOP sensor harness connector and ECM harness connector.
- 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 EC-342, "Component Inspection (EOP Sensor)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Replace EOP sensor. Refer to EM-94, "Exploded View".
4.CHECK EOP SENSOR POWER SUPPLY CIRCUIT-2
Check the voltage between EOP sensor harness connector terminal and ground.
Is the inspection result normal? YES >> GO TO 6.
NO >> GO TO 5.
5.CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Check sensor power supply 2 circuit. Refer to EC-444, "Diagnosis Procedure".
Is inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
6.CHECK EOP SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between EOP sensor harness connector and ECM harness connector.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace error-detected parts.
7.CHECK ECM GROUND CIRCUIT
Check the continuity between ECM harness connector and ground.
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Repair or replace error-detected parts.
Component Inspection (EOP Sensor)
1.CHECK EOP SENSOR
- Turn ignition switch OFF.
- Disconnect EOP sensor harness connector.
- Check the resistance between EOP sensor connector terminals.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace EOP sensor. Refer to EM-94, "Exploded View".
P050A, P050B, P050E Cold start control
Description
ECM controls ignition timing and engine idle speed when engine is started
with pre-warming up condition.
This control promotes the activation of three way catalyst by heating the
c ...
P0524 Engine oil pressure
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0524
ENGINE OIL PRESSURE
(Engine oil ...
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