Diagnostic Procedure

Models with FDC 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 Screws (Models With FDC System)

   Courtesy of NISSAN MOTOR CO., U.S.A.

Models without FDC 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 Screws (Models Without FDC System)

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: GO TO 2.

NG: Repair or replace ground connections.

1. Disconnect exhaust valve timing control position sensor harness connector.
   Fig 3: Identifying Exhaust Valve Timing Control Position Sensor And Camshaft Position Sensor

   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.

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

OK or NG 

OK: GO TO 5.

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

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 "COMPONENT INSPECTION ".)

OK or NG 

OK: GO TO 6.

NG: Replace malfunctioning component.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO  14.

NG: GO TO 7.

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 

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.

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.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 11.

NG: Replace exhaust valve timing control position sensor.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 12.

NG: Replace crankshaft position sensor (POS).

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 13.

NG: Replace malfunctioning camshaft position sensor (PHASE).

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 Signal Plate Of Camshaft Rear End

Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END