Diesel Throttle Body On-Vehicle Inspection

Check for throttle control motor operating sounds.

1. Turn the engine switch on (IG).
   

2. When depressing the accelerator pedal, check for operating sound of the motor. Make sure that no friction noises emit from the motor.
   If friction noise exists, replace the throttle body.
   

Check the throttle position sensor.

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the intelligent tester main switch on.
   

4. Enter the following menus: Power train / Engine / Data List / Throttle Position.
   

5. When the throttle valve is fully opened, check that the value of the "Throttle Position" is within the specification.
   

   Standard throttle valve opening percentage:

   60% or more
   

   CAUTION:

   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.