Diagnosis Procedure

WARNING: This page is about a different car, the 2011 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 that oil pressure warning lamp is not illuminated.
  Is oil pressure warning lamp illuminated?
  
  YES: Go to "INSPECTION ".
  
  NO: GO TO 2.
  
  Fig 1: Checking Oil Pressure Warning Lamp
  Courtesy of NISSAN MOTOR CO., U.S.A.
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
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 4.

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

Is the inspection result normal?

YES: GO TO 5.

NO: Replace malfunctioning camshaft position sensor. Refer to "EXPLODED VIEW ".
CHECK CAMSHAFT (INTAKE)
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. Refer to "EXPLODED VIEW ".
  
  Fig 2: Inspecting Camshaft Signal Plate
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK TIMING CHAIN INSTALLATION
Check service records for any recent repairs that may cause timing chain misalignment.

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

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