Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See Figure. Refer to GROUND INSPECTION .

   OK or NG

   1. OK: Go to 2.
   2. NG: Repair or replace ground connections.

1. Disconnect accelerator pedal position (APP) sensor harness connector. See Figure.
2. Turn ignition ON.
3. Check voltage between APP sensor terminal 6 and ground with CONSULT-II or tester.
   Fig 1: Confirming Reference Voltage To APP Sensor 1

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Voltage: Approximately 5V 

   OK or NG

   1. OK: Go to 5.
   2. NG: Go to 3.

Check the following.

• Harness for short to power and short to ground, between the following terminals.
  TESTING APP SENSOR ECM TERMINALS
  
  

  ECM Terminal	Sensor Terminal	See
  48	EVAP Control System Pressure Sensor Terminal 3	WIRING DIAGRAM
  49	Refrigerant Pressure Sensor Terminal 1	WIRING DIAGRAM
  90	APP Sensor Terminal 6	WIRING DIAGRAM
  91	PSP Sensor Terminal 1	WIRING DIAGRAM

• ECM pin terminal.

  OK or NG

  1. OK: Go to 4.
  2. NG: Repair short to ground or short to power in harness or connectors.

Check the following.

• Refrigerant pressure sensor. Refer to .
• Power steering pressure sensor. Refer to COMPONENT INSPECTION .
• EVAP control system pressure sensor. Refer to COMPONENT INSPECTION .

  OK or NG

  1. OK: Go to 7.
  2. NG: Replace malfunctioning component.

Refer to COMPONENT INSPECTION .

OK or NG

1. OK: Go to 7.
2. 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 .
   1. Inspection end 

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

1. Inspection end