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.

2004 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

Power Window Control System

PROBLEM SYMPTOMS TABLE - POWER WINDOW CONTROL SYSTEM

Symptom	Suspect Area
All the power windows does not operate.	PWS circuit Power window master switch circuit Body ECU No. 1
Power window does not operate.	Power window switch circuit Power window motor circuit Driver door ECU
Auto up (or down) function does not operate.	Power window master switch circuit Driver door ECU
Jam protection function and auto up (or down) function does not operate.	Jam protection limit switch circuit Jam protection pulse switch circuit Driver door ECU

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.