1. Check Electric Throttle Control Actuator Visually

1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.
   Fig 1: Visually Inspect Throttle Valve For Foreign Matter

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 2.
2. NG: Remove the foreign matter and clean the electric throttle control actuator inside.