On-Vehicle Inspection

CHECK THROTTLE BODY
1. Check the throttle control motor operating sounds.
  
  Fig 1: Checking Throttle Control Motor Operating Sounds
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Turn the engine switch on (IG).
  2. When pressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises emit from the motor.
    If friction noise exists, replace the throttle body.
2. Check the throttle position sensor.
  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream main switch ON.
  4. Enter the following menus: Powertrain/Engine and ECT/Data List/Throttle Sensor Position and Throttle Sensor Position #2.
  5. Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of the "Throttle Sensor Position" is within the specification.
    Standard throttle valve opening percentage
    
    60% or more
    
    NOTE:
    When checking the standard throttle valve opening percentage, the shift lever should be in the N position.
    
    If the percentage is less than 60%, replace the throttle body.