Diagnosis Procedure

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

   Is oil pressure warning lamp illuminated? 

   YES: Check the engine oil level. Refer to "INSPECTION ".

   NO: GO TO 2.

   Fig 1: Identifying Oil Pressure Warning Lamp

   Courtesy of NISSAN NORTH AMERICA, INC.

Check the exhaust valve timing control solenoid valve. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 3.

NO: Replace exhaust valve timing control solenoid valve. Refer to "EXPLODED VIEW ".

Check the crankshaft position sensor (POS). Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 4.

NO: Replace crankshaft position sensor (POS). Refer to "EXPLODED VIEW ".

Check the exhaust valve timing control position sensor. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace exhaust valve timing control position sensor. Refer to "EXPLODED VIEW ".

Check the following.

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

  Is the inspection result normal? 

  YES: GO TO 6.

  NO: Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to "REMOVAL AND INSTALLATION ".

  Fig 2: Inspecting Signal Plate Of Camshaft Rear End

  Courtesy of NISSAN NORTH AMERICA, INC.

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.

Refer to "INSPECTION ".

Is the inspection result normal? 

YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

NO: Clean lubrication line.