2011 Lexus GS 450hFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. CHECK THROTTLE BODY 
    1. Check the throttle control motor operating sounds.
      1. Connect the Techstream to the DLC3.
      2. Turn the power switch ON (IG).
      3. Push the Techstream main switch ON.
      4. Enter the following menus: Powertrain / Engine / Active Test / Control the ETCS Open Slow Speed or Control the ETCS Close Slow Speed or Control the ETCS Open Fast Speed or Control the ETCS Close Fast Speed.
        5. Fig 1: Checking Throttle Control Motor Operating Sounds
        GTY104621Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Check the operating sound of the running motor. Make sure that no friction noises emit from the motor.

        If friction noise exists, replace the throttle body.

    2. Check the throttle position sensor.
      1. Connect the Techstream to the DLC3.
      2. Turn the power switch ON (IG).
      3. Push the Techstream main switch ON.
      4. Enter the following menus: Powertrain / Engine / Data List / Control the ETCS Open Slow Speed or Control the ETCS Close Slow Speed or Control the ETCS Open Fast Speed or Control the ETCS Close Fast Speed.

        Specified Condition

        Tester Display Specified Condition
        Throttle Position Value varies according to Active Test
        Throttle Sensor Position
        Throttle Position No. 1
        Throttle Position No. 2

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

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.