Throttle Body On-Vehicle Inspection

Listen to the throttle control motor operating sounds.

1. Turn the ignition switch to ON.
   

2. When depressing the accelerator pedal, listen to the operating sound of the motor. Make sure that no friction noises are emitted from the motor.
   If friction noise exists, check the throttle body with motor, the wire harness and the ECM.
   

Inspect the throttle position sensor.

1. Warm up the engine.
   

2. Turn the ignition switch off.
   

3. Connect the intelligent tester to the DLC3.
   

4. Turn the ignition switch to ON.
   

5. Turn the intelligent tester on.
   

6. Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Sensor Volt %.
   

7. Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of Throttle Position is within the specified range.
   

   Standard throttle valve opening percentage:

   60% or more
   

   NOTICE:

   When checking the standard throttle valve opening percentage, make sure the transmission is in neutral.

   If the result is not as specified, check the throttle body with motor, the wire harness and the ECM.