Diagnostic Procedure

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

   Refer to "GROUND INSPECTION ".

   Fig 1: Locating ECM 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.

1. Disconnect accelerator pedal position (APP) sensor harness connector.
   Fig 2: Disconnecting Accelerator Pedal Position Sensor Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 2 and ground with CONSULT-II or tester.
   1. Voltage: Approximately 5V 
   Fig 3: Checking Voltage Between APP Sensor Connector Terminal 2 And Ground

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

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.
  ECM TERMINALS AND APP SENSOR TERMINALS REFERENCE
  
  

  ECM terminal	Sensor terminal	Reference Wiring Diagram
  90	APP sensor terminal 2	WIRING DIAGRAM
  48	EVAP control system pressure sensor terminal 3	WIRING DIAGRAM
  49	Refrigerant pressure sensor terminal 1	WIRING DIAGRAM
  68	PSP sensor terminal 1	WIRING DIAGRAM

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 REFRIGERANT PRESSURE SENSOR .)
• Power steering pressure sensor (Refer to POWER STEERING PRESSURE SENSOR .)
• EVAP control system pressure sensor (Refer to EVAP CONTROL PRESSURE SENSOR .)

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