On-Vehicle Inspection

CHECK THROTTLE BODY
1. Check the throttle control motor operating sounds.
  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.
    
    Fig 1: Checking Throttle Control Motor Operating Sounds
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the throttle position sensor.
  1. Connect the intelligent tester to the DLC3.
  2. Turn the engine switch on (IG).
  3. Push the intelligent tester main switch ON.
  4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / THROTTLE POS AND THROTTLE POS #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.
    
    Fig 2: Connecting Intelligent Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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.