Diagnosis Procedure

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

   Is oil pressure warning lamp illuminated? 

   YES: Go to "INSPECTION ".

   NO: GO TO 2.

   Fig 1: Identifying Oil Pressure Warning Lamp

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

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 3.

NO: Replace malfunctioning intake valve timing control solenoid valve.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 4.

NO: Replace crankshaft position sensor (POS).

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace malfunctioning camshaft position sensor (PHASE).

Check the following.

• Accumulation of debris on the signal plate of camshaft front end
• Chipping signal plate of camshaft front end

  Is the inspection result normal? 

  YES: GO TO 6.

  NO: Remove debris and clean the signal plate of camshaft front end or replace camshaft.

  Fig 2: Inspecting Camshaft Signal Plate

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

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

Are there any service records that may cause timing chain misaligned? 

YES: Check timing chain installation. Refer to "REMOVAL AND INSTALLATION ".

NO: GO TO 7.

Perform "Inspection of Camshaft Sprocket (INT) Oil Groove". Refer to "INSPECTION ".

Is the inspection result normal? 

YES: GO TO 8.

NO: Clean lubrication line.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END