Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two 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 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor (1) harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Accelerator Pedal Position Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 5 and ground with CONSULT-II or tester.
  Voltage: Approximately 5V
OK or NG

OK: GO TO 8.

NG: GO TO 3.

Fig 3: Checking Voltage Between APP Sensor Terminal 5 And Ground With CONSULT-II Or Tester
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 5 and ECM terminal 91. Refer to Wiring Diagram .
  Continuity should exist.
OK or NG

OK: GO TO 5.

NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E108, M15
- Harness for open or short between ECM and accelerator pedal position sensor
: Repair open circuit.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

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

ECM TERMINALS REFERENCE

ECM terminal	Sensor terminal	Reference Wiring Diagram
91	APP sensor terminal 5	Wiring Diagram
47	Electric throttle control actuator terminal 1	Wiring Diagram

OK or NG

OK: GO TO 6.

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 14.

NG: GO TO 7.
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 ".
: 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 1 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 10.

NG: GO TO 9.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E108, M15
- Harness for open or short between ECM and accelerator pedal position sensor
: 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 12.

NG: GO TO 11.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E108, M15
- Harness for open or short between ECM and accelerator pedal position sensor
: 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 14.

NG: GO TO 13.
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