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.
2009 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE
Rear Power Window Switch: Inspection
- INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLYΒ
- Measure the resistance according to the value (s) in the table below.
Standard resistance:Β
STANDARD RESISTANCE REFERENCE CHARTTester Connection Switch Condition Specified Condition 2 (UP) - 5 (GND) Manual UP operation Below 1 Ξ© 10 (DOWN) - 5 (GND) Manual DOWN operation Below 1 Ξ© 4 (AUTO) - 5 (GND) AUTO UP/DOWN operation Below 1 Ξ© If the result is not as specified, replace the power window regulator switch assembly.
- Check that the LED illuminates.
- Apply battery voltage to the power window regulator switch and check that the LED illuminates.
OK:Β
MEASUREMENT CONDITION REFERENCE CHARTMeasurement Condition Specified Condition Battery positive (+) β 8 (LED)
Battery negative (-) β 5 (GND)LED illuminates If the result is not as specified, replace the power window regulator switch assembly.
- Measure the resistance according to the value (s) in the table below.
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.