Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OIL PRESSURE WARNING LAMP
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 NORTH AMERICA, INC.
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.
CHECK CRANKSHAFT POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 4.

NO: Replace crankshaft position sensor.
CHECK CAMSHAFT POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 5.

NO: Replace malfunctioning camshaft position sensor.
CHECK CAMSHAFT (INTAKE)
Check the following.
- Accumulation of debris to 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. Refer to "EXPLODED VIEW ".
  
  Fig 2: Inspecting Camshaft Signal Plate
  Courtesy of NISSAN NORTH AMERICA, INC.
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 "DISASSEMBLY AND ASSEMBLY ".

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