Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten four ground screws on the body. Refer to GROUND INSPECTION .
  
  Fig 1: Checking Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 2.
- NG: Repair or replace ground connections.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Disconnecting Accelerator Pedal Position (APP) Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 2 and ground with CONSULT-II or tester.
  Voltage: Approximately 5V
OK or NG
- OK: GO TO 4.
- NG: GO TO 3.
  
  Fig 3: Checking Voltage Between APP Sensor Terminal 2 & Ground With CONSULT-II Or Tester
  Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
- Repair harness or connectors.
CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 82 and APP sensor terminal 4.
  Refer to WIRING DIAGRAM - APPS1 .
  
  Continuity should exist.
4. Also check harness for short to ground or short to power.
OK or NG
- OK: GO TO 6.
- NG: GO TO 5.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
- : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 3. Refer to WIRING DIAGRAM - APPS1 .
  Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
- OK: GO TO 8.
- NG: GO TO 7.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
- : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR
Refer to COMPONENT INSPECTION .

OK or NG
- OK: GO TO 10.
- NG: GO TO 9.
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 INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
- INSPECTION END