Inspection Procedure 12: The Feeling of Impact or Vibration when Decelerating


  • Failure is possibly caused by an insufficient amount of intake air due to failed electronic-controlled throttle valve system.


  • Failed electronic control throttle valve system
  • Contamination around the throttle valve
  • Failed engine-ECU


STEP 1. M.U.T.-III diagnosis code

Q. Is diagnosis code set?

Inspection chart for diagnosis code (Refer to ).
Go to Step 2 .

STEP 2. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. Item 11: Accelerator pedal position sensor (main)
  2. Item 12: Accelerator pedal position sensor (sub)
  3. Item 13: Throttle position sensor (main)
  4. Item 15: Throttle position sensor (sub)

Q. Are the check results normal?

Go to Step 3 .
Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).

STEP 3. Check throttle body (throttle valve portion) contamination.

Q. Is the check result normal?

Replace the engine-ECU.
Clean throttle body (throttle valve portion) (Refer to ).