Diagnostic Procedure

CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 2.
2. NG: Replace crankshaft position sensor (POS).
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 3.
2. NG: Replace camshaft position sensor (PHASE).
CHECK CAMSHAFT (INTAKE)
Check the following.
- Accumulation of debris to the signal plate of camshaft rear end
- Chipping signal plate of camshaft rear end
OK or NG
1. OK: GO TO 4.
2. NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
  
  Fig 1: Checking Camshaft (Intake)
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

For wiring diagram, refer to WIRING DIAGRAM for CKP sensor (POS) and WIRING DIAGRAM for CMP sensor (PHASE).
1. INSPECTION END