Diagnostic Procedure

1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illuminated.

Fig 1: Identifying Oil Pressure Warning Lamp

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

OK or NG 

OK: GO TO 2.

NG: Go to "OIL PRESSURE CHECK ".

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 3.

NG: Replace intake valve timing control solenoid valve.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 4.

NG: Replace crankshaft position sensor (POS).

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 5.

NG: Replace camshaft position sensor (PHASE).

Check the following.

• Accumulation of debris to the signal plate of camshaft rear end
• Chipping signal plate of camshaft rear end

Fig 2: Identifying Camshaft (Intake)

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

OK or NG 

OK: GO TO 6.

NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.

Check service records for any recent repairs that may cause timing chain misaligned.

OK or NG 

OK: Check timing chain installation. Refer to "TIMING CHAIN ".

NG: GO TO 7.

Refer to "INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE ".

OK or NG 

OK: GO TO 8.

NG: Clean lubrication line.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

For Wiring Diagram, refer to WIRING DIAGRAM for CKP sensor (POS) and WIRING DIAGRAM for CMP sensor (PHASE).

INSPECTION END