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 THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Electric Throttle Control Actuator
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.
  
  Fig 3: Checking Voltage Between Electric Throttle Control Actuator Terminal 1 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 THROTTLE POSITION SENSOR 2 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 .
  
  Continuity should exist.
OK or NG
1. OK GO TO 4.
2. NG Repair or replace 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.
- 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 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 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 .
  
  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 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 4, ECM terminal 69 and electric throttle control actuator terminal 2.
  Refer to WIRING DIAGRAM .
  
  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