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Home >> Nissan-Datsun >> 2004 >> Quest SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P1121: Electric Throttle Control Actuator >> Diagnostic Procedure
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Diagnostic Procedure

  1. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 
    1. Remove the intake air duct.
    2. Check if a foreign matter is caught between the throttle valve and the housing.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Remove the foreign matter and clean the electric throttle control actuator inside.
      Fig 1: Removing Intake Air Duct
      G00884107Courtesy of NISSAN MOTOR CO., U.S.A.
  2. 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