Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Lexus IS FFACTORY OEM SERVICE PROCEDURE
On-Vehicle Inspection
- CHECK THROTTLE BODY ASSEMBLY
- Check the throttle position sensor.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream ON.
- Enter the following menus: Powertrain / Engine / Data List / All Data / Throttle Sensor Position.
- Start the engine.
- Firmly depress the brake pedal with your left foot, and move the shift lever to N.
- Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of "Throttle Sensor Position" is within the specification.
Standard throttle valve opening percentage
60% or more
HINT:
When checking the standard throttle valve opening percentage, the shift lever should be in N.
- If the percentage is less than 60%, replace the throttle body.
- Check the throttle position sensor.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.