Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body, Refer to GROUND INSPECTION .
Fig 1: Tightening Ground Screws On Body
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 2.
- NG: Repair or replace ground connections.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness connector.
  
  Fig 2: Locating Accelerator Pedal Position (APP) Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 1 and ground with CONSULT-II or tester.
  - Voltage: Approximately 5V
  Fig 3: Checking Voltage Between APP Sensor Connector Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 7.
- NG: GO TO 3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 1 and ECM terminal 91.
  Refer to WIRING DIAGRAM .
  - Continuity should exist.
OK or NG
- OK: GO TO 4.
- NG: Repair open circuit or short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III

Check the following.

Harness for short to power and short to ground, between the terminals listed in ECM TERMINAL AND APP SENSOR TERMINAL REFERENCE - THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III .

ECM TERMINAL AND APP SENSOR TERMINAL REFERENCE - THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III

ECM terminal	Sensor terminal	Reference Wiring Diagram
91	APP sensor terminal 1	Figure
47	Electric throttle control actuator terminal 2	Figure

OK or NG

OK: GO TO 5.
NG: Repair short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR
Refer to COMPONENT INSPECTION .

OK or NG
- OK: GO TO 11.
- NG: GO TO 6.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
3. Perform IDLE AIR VOLUME LEARNING .
  - : INSPECTION END
CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 5 and ECM terminal 83.
  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 8.
- NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 98 and APP sensor terminal 6.
  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 9.
- NG: 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 11.
- NG: GO TO 10.
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