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: Locating Body Ground Screws
  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: Checking APP Sensor 2 Power Supply Circuit-I
  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

OK or NG

OK: GO TO 7.

NG: GO TO 3.

Fig 3: Checking Voltage Between APP Sensor Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-III

Check harness for short to power and short to ground, between the following terminals.

THROTTLE POSITION SENSOR 2 REFERENCE WIRING DIAGRAM

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

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