Diagnostic Procedure

RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
  View with engine harness connector disconnected
  
  Fig 1: Identifying Engine Ground Screws
  Courtesy of NISSAN MOTOR CO., U.S.A.
1. GO TO 2.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Accelerator Pedal Position Sensor
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 12 and ground with CONSULT-II or tester.
  
  Fig 3: Checking Voltage Between APP Sensor Terminal 12 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Voltage: Approximately 5V
OK or NG
1. OK GO TO 3.
2. NG Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 10 and ground with CONSULT-II or tester.

Fig 4: Checking Voltage Between APP Sensor Terminal 10 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Voltage: Approximately 5V

OK or NG
1. OK GO TO 8 .
2. NG GO TO 4.
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 10 and ECM terminal 91.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
OK or NG
1. OK GO TO 5.
2. NG Repair or replace 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 terminal 47 and electric throttle control actuator terminal 1. Refer to "WIRING DIAGRAM " .
- ECM terminal 91 and APP sensor terminal 10. Refer to "WIRING DIAGRAM " .
OK or NG
1. OK GO TO 6.
2. NG Repair 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 12 .
2. 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 " .
1. INSPECTION END
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between APP sensor terminals 7, 9 and engine ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
3. 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 APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 106 and APP sensor terminal 11, ECM terminal 98 and APP sensor terminal 8.
  Refer to WIRING DIAGRAM
  
  Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK GO TO 10.
2. 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
1. OK GO TO 12 .
2. NG Replace accelerator pedal assembly.
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 INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT " .
1. INSPECTION END