Diagnosis Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.

   Refer to "GROUND INSPECTION ".

   Fig 1: Identifying Ground Connections Components

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

   OK or NG 

   OK : GO TO 2.

   NG : Repair or replace ground connections.

1. Disconnect EVAP control system pressure sensor (1) harness connector.
   • EVAP canister (2)
   • EVAP canister vent control valve (3)
   Fig 2: Identifying EVAP Control System Pressure Sensor, EVAP Canister And EVAP Canister Vent Control Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check sensor harness connector for water.

   Water should not exist  .

   OK or NG 

   OK : GO TO 3.

   NG : Repair or replace harness connector.

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

OK or NG 

OK : GO TO 4.

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

Check the following.

• Refrigerant pressure sensor (Refer to TROUBLE DIAGNOSIS ).
• Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ").

  OK or NG 

  OK : GO TO 5.

  NG : Replace malfunctioning components.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK : GO TO  7.

NG : GO TO 6.

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 

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK : GO TO 8.

NG : Replace EVAP control system pressure sensor.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

For wiring diagram, refer to "WIRING DIAGRAM ".

INSPECTION END