Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

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.
  OK or NG
  
  OK: GO TO 2.
  
  NG: Remove the foreign matter and clean the electric throttle control actuator inside.
  
  Fig 1: Identifying Electric Throttle Control Actuator And Throttle Valve
  Courtesy of NISSAN NORTH AMERICA, INC.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator. Refer to "EXPLODED VIEW ".
2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
3. Perform "IDLE AIR VOLUME LEARNING ".
  INSPECTION END