Diagnostic Procedure

Check Ground Connections
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body, See Figure and Refer to GROUND INSPECTION .
OK or NG
1. OK: go to 2.
2. NG: Repair or replace ground connections.
Check Throttle Position Sensor 1 Power Supply Circuit-I
1. Disconnect electric throttle control actuator harness connector. See Figure .
2. Turn ignition switch ON.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.
  
  Fig 1: Testing Electric Throttle Control Actuator Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Voltage: Approximately 5V
OK or NG
1. OK: go to 7 .
2. NG: go to 3.
Check Throttle Position Sensor 1 Power Supply Circuit-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
OK or NG
1. OK: go to 4.
2. NG: Repair or replace open circuit.
Check Throttle Position Sensor 1 Power Supply Circuit-III
Check harness for short to power and short to ground, between the following terminals. See Fig 2 .

Fig 2: Identifying Terminals Likely To Have Short To Power Or Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: go to 5.
2. NG: Repair short to ground or short to power in harness or connectors.
Check APP Sensor
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: go to 11 .
2. NG: go to 6.
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 .
  1. Inspection end
Check Throttle Position Sensor 1 Ground Circuit For Open And Short
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 8.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
Check Throttle Position Sensor 1 Input Signal Circuit For Open And Short
1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
2. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 9.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
Check Throttle Position Sensor
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: go to 11 .
2. NG: go to 10.
Replace Electric Throttle Control Actuator
1. Replace the electric throttle control actuator.
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
3. Perform IDLE AIR VOLUME LEARNING .
  1. Inspection end
Check Intermittent Incident
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. Inspection end