Diagnosis Procedure

CHECK GROUND CONNECTIONS
Models with VDC system, navigation system or telephone
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Identifying Body Ground E17 And Body Ground E43
  Courtesy of NISSAN MOTOR CO., U.S.A.
Models without VDC system, navigation system and telephone
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 2: Identifying Body Ground E17 And Body Ground E43
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: GO TO 2.
  
  NG: Repair or replace ground connections.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect exhaust valve timing control position sensor harness connector.
  
  Fig 3: 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 1 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
  
  OK or NG
  
  OK: GO TO 8.
  
  NG-1: P1078: Repair open circuit or short to ground or short to power in harness connector.
  
  NG-2: P1084: GO TO 3.
  
  Fig 4: Checking Voltage Between Exhaust Valve Timing Control Position Sensor Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between exhaust valve timing control position sensor terminal 1 and ECM terminal 64.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
  
  OK or NG
  
  OK: GO TO 4.
  
  NG: Repair open circuit.

CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-III

Check harness for short to power and short to ground, between the following terminals.

ECM TERMINAL REFERENCE

ECM terminal	Sensor terminal	Reference Wiring Diagram
46	CKP sensor (POS) terminal 1	WIRING DIAGRAM
64	CMP sensor (PHASE) (bank 2) terminal 1	WIRING DIAGRAM
64	EVT control position sensor (bank 2) terminal 1	WIRING DIAGRAM
103	APP sensor terminal 4	WIRING DIAGRAM
107	EVAP control system pressure sensor terminal 3	WIRING DIAGRAM
111	Refrigerant pressure sensor terminal 1	WIRING DIAGRAM

OK or NG

OK: GO TO 5.

NG: Repair short to ground or short to power in harness or connectors.

CHECK COMPONENTS
Check the following.
- Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ").
- Camshaft position sensor (PHASE) (bank 2) (Refer to "COMPONENT INSPECTION ").
- EVAP control system pressure sensor (Refer to "COMPONENT INSPECTION ").
- Refrigerant pressure sensor (Refer to MAGNET CLUTCH CIRCUIT ).
  OK or NG
  
  OK: GO TO 6.
  
  NG: Replace malfunctioning component.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 14.

NG: GO TO 7.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
3. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
4. Perform "IDLE AIR VOLUME LEARNING ".
  INSPECTION END
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between exhaust valve timing control position sensor terminal 2 and ECM terminal 88. Refer to WIRING DIAGRAM .
  Continuity should exist .
4. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 9.
  
  NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK EXHAUST VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 58 (bank 1) or 62 (bank 2) and exhaust valve timing control position sensor terminal 3.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
2. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 10.
  
  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

OK: GO TO 11.

NG: Replace exhaust valve timing control position sensor.
CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 12.

NG: Replace crankshaft position sensor (POS).
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 13.

NG: Replace malfunctioning 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
  OK or NG
  
  OK: GO TO 14.
  
  NG: Remove debris and clean the signal plate of camshaft rear end or replace malfunctioning camshaft.
  
  Fig 5: Identifying Camshaft (EXH)
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END