Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Loosening 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 EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect exhaust valve timing control position sensor harness connector.
  
  Fig 2: Identifying Exhaust Valve Timing Control Position Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Turn ignition switch ON.
3. Check voltage between exhaust valve timing control position sensor terminal 3 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
  
  Fig 3: Identifying Voltage Between Exhaust Valve Timing Control Position Sensor Terminal 3 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: GO TO 3.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E12, F3
- Harness for open or short between exhaust valve timing control position sensor and IPDM E/R
- Harness for open or short between exhaust valve timing control position sensor and ECM
  Repair open circuit or short to ground or short to power in harness or connectors.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between exhaust valve timing control position sensor terminal 1 and ground. Refer to WIRING DIAGRAM .
  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 F102, M72
- Harness for open or short between exhaust valve timing control position sensor and ground
  Repair open circuit or short to power in harness or connectors.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 53 (bank 1) or 72 (bank 2) and exhaust valve timing control position sensor terminal 2.
  Refer to WIRING DIAGRAM .
  
  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 EXHAUST VALVE TIMING CONTROL POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 8.
2. NG: Replace exhaust 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 (EXH)
Check the following;
- Accumulation of debris to the signal plate of camshaft rear end
- Chipping signal plate of camshaft rear end
  
  Fig 4: Identifying Camshaft
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 11.
2. NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

INSPECTION END