Diagnostic Procedure

RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws. See Figure .
1. : GO TO 2.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector. See Figure .
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
  Refer to Wiring Diagram.
  
  Fig 1: Displaying ECM Terminal Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
5. Also check harness for short to ground and short to power.
  OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace.
CHECK THROTTLE CONTROL MOTOR
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 4.
2. NG: GO TO 5 .
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG
1. OK: GO TO 5.
2. NG: Repair or replace or harness or connectors.
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