Diagnosis Procedure

CHECK OIL PRESSURE WARNING LAMP
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 NORTH AMERICA, INC.
  
  Is oil pressure warning lamp illuminated?
  
  YES: Go to "INSPECTION ".
  
  NO: GO TO 2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 3.

NO: Replace malfunctioning intake valve timing control solenoid valve. Refer to "EXPLODED VIEW ".
CHECK 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 CAMSHAFT POSITION SENSOR (PHASE)
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 5.

NO: Replace malfunctioning camshaft position sensor (PHASE). Refer to "EXPLODED VIEW ".
CHECK CAMSHAFT (INTAKE)
Check the following.
- Accumulation of debris to the signal plate of camshaft rear end
- Chipping signal plate of camshaft rear end
  
  Fig 2: Inspecting Camshaft Rear End Signal Plate For Debris
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  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 "EXPLODED VIEW ".
CHECK TIMING CHAIN INSTALLATION
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.
CHECK LUBRICATION CIRCUIT
Perform "Inspection of Camshaft Sprocket (INT) Oil Groove". Refer to "INSPECTION ".

Is the inspection result normal?

YES: GO TO 8.

NO: Clean lubrication line.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

INSPECTION END