Throttle Body On-Vehicle Inspection

Listen to the throttle control motor operating sounds.

1. Turn the ignition switch to the ON position.
   

2. When pressing the accelerator pedal position sensor lever, listen to the running motor. Make sure that no friction noise comes from the motor.
   If friction noise exists, replace the throttle body assembly.
   

Inspect the throttle position sensor.

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to the ON position.
   

3. Check that the MIL turns off.
   

4. Under CURRENT DATA, the throttle valve opening percentage (THROTTLE POS) should be within the standard range below.
   

   Standard throttle valve opening percentage:

   60% or more
   

   If the percentage is less than 60%, replace the throttle body assembly.
   

   NOTICE:

   When checking the throttle valve opening percentage, the transmission should be in neutral.