Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Locating Three Ground Screws On Body
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace ground connections.
CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect intake valve timing control position sensor harness connector.
  
  Fig 2: Locating Intake Valve Timing Control Position Sensor
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Turn ignition switch ON.
3. Check voltage between intake valve timing control position sensor terminal 3 and ground with CONSULT-II or tester.
  1. Voltage: Battery voltage
OK or NG
1. OK: GO TO 4.
2. NG: GO TO 3.
Fig 3: Checking Voltage Between Intake Valve Timing Control Position Sensor Terminal 3 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M135, F105
- Harness for open or short between intake valve timing control position sensor and ECM relay
- Harness for open or short between intake valve timing control position sensor and ECM
  1. Repair open circuit or short to ground or short to power in harness or connectors.
CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between intake valve timing control position sensor terminal 1 and ground. Refer to WIRING DIAGRAM .
  1. Continuity should exist.
3. Also check harness for short to power.
OK or NG
1. OK: GO TO 6.
2. NG: GO TO 5.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E32
- Harness for open or short between intake valve timing control position sensor and ground
  1. Repair open circuit or short to power in harness or connectors.
CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between the following;
  ECM terminal 72 and intake valve timing control position sensor (bank 1) terminal 2 or
  
  ECM terminal 53 and intake valve timing control position sensor (bank 2) terminal 2.
  
  Refer to WIRING DIAGRAM .
  1. Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 7.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 8.
2. NG: Replace intake valve timing control position sensor.
CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 9.
2. NG: Replace crankshaft position sensor (POS).
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 10.
2. NG: Replace camshaft position sensor (PHASE).
CHECK CAMSHAFT SPROCKET
Check accumulation of debris to the signal pick-up portion of the camshaft sprocket. Refer to "TIMING CHAIN ".

OK or NG
1. OK: GO TO 11.
2. NG: Remove debris and clean the signal pick-up cutout of camshaft sprocket.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END