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 APR SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APR) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Accelerator Pedal Position (APP) Sensor Harness Connector And Hood Opener Handle
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APR sensor terminal 2 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
OK or NG

OK: GO TO 4.

NG: GO TO 3.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 1 and ground with CONSULT-III or tester.

Voltage: Approximately 5V

Fig 4: Checking Voltage Between APP Sensor Terminal 1 And Ground With CONSULT-III Or Tester
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 10.

NG: GO TO 5.
CHECK APR SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APR sensor terminal 1 and ECM terminal 91. Refer to Wiring Diagram.
  Continuity should exist .
OK or NG

OK: GO TO 7.

NG: GO TO 6.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open between ECM and accelerator pedal position sensor

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

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

APP SENSOR SPECIFICATION

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

OK or NG

OK: GO TO 8.

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 16.

NG: GO TO 9.
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 ."
CHECK APP SENSOR 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, ECM terminal 83 and APP sensor terminal 5.
  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 12.

NG: GO TO 11.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 3, 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 14.

NG: GO TO 13.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between accelerator pedal position sensor and ECM
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ."

OK or NG

OK: GO TO 16.

NG: GO TO 15.
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 ."
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ."

>> INSPECTION END