On-Vehicle Inspection

CHECK THROTTLE BODY

Check the throttle control motor operating sounds.
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Select the following menu items: Powertrain/Engine and ECT/Active Test/Control the ETCS Open Slow Speed, Control the ETCS Close Slow Speed, Control the ETCS Open Fast Speed and Control the ETCS Close Fast Speed.
5. Check the operating sound of the running motor. Make sure that no friction noises emit from the motor.
  If a friction noise exists, replace the throttle body.
  
  Fig 1: Checking Throttle Control Motor Operating Sounds
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the throttle position sensor.

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.

Select the following menu items: Powertrain/Engine and ECT/Active Test/Control the ETCS Open Slow Speed, Control the ETCS Close Slow Speed, Control the ETCS Open Fast Speed and Control the ETCS Close Fast Speed.

Specified Condition

THROTTLE POSITION

Tester Display	Specified Condition
Throttle position	Value varies according to Active Test
Throttle Sensor position
Throttle Sensor position #2

If the result is not as specified, replace the throttle body.