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.
2010 Lexus IS 250C AutomaticFACTORY OEM SERVICE PROCEDURE
Remote Up / Down Function does not Operate: Description
- When the engine switch is on (IG) and the window lock switch is off, operation signals are sent from the power window regulator master switch assembly to the power window regulator switch assembly or the sliding roof control ECU assembly via the BEAN communication line.
HINT:
- The front passenger side window operation signal is sent to the power window regulator switch assembly.
- Quarter window power window operation signals are sent to the sliding roof control ECU assembly.
- When the power window regulator switch assembly receives an operation signal from the power window regulator master switch assembly, it operates the power window regulator motor assembly (for front passenger side).
- When the sliding roof control ECU assembly receives an operation signal from the power window regulator master switch assembly, it will operate the appropriate power window regulator motor assembly (for rear LH or rear RH side).
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.