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.
2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE
Fail-Safe Chart
- CHECK POWER WINDOW FAIL-SAFE FUNCTIONÂ
- If a hall IC built-in power window regulator motor malfunctions, the applicable power window components enter fail-safe mode. In this mode, power window system operates as follows:
Power Window Control SystemÂ
FAIL-SAFE CHARTPower Window Operation Engine Switch on (IG) Engine Switch off Key-off (Within approx. 45 seconds after engine switch turned off) Key-off (After approx. 45 seconds elapsed after engine switch turned off) Manual UP Operation prohibited Operation prohibited Operation prohibited Manual DOWN Operative Operation prohibited Operation prohibited AUTO UP (hold switch at AUTO UP position) Operative (in MANUAL mode) Operation prohibited Operation prohibited AUTO UP Operation prohibited Operation prohibited Operation prohibited AUTO DOWN Operation prohibited Operation prohibited Operation prohibited Key-linked open - Operation prohibited Key-linked close - Operation prohibited Wireless transmitter-linked open - Operation prohibited
- If a hall IC built-in power window regulator motor malfunctions, the applicable power window components enter fail-safe mode. In this mode, power window system operates as follows:
Factory Service Tools
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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.
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