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.
2001 Lexus GS 300FACTORY OEM SERVICE PROCEDURE
Left Front Door
- Driver's door lock control switch is also referred to as power window master switch. Remove power window master switch assembly from front door. Connect ohmmeter between terminals No. 16 (White/Black wire) and No. 5 (Light Green/Black wire) of power window master switch connector (component side). See WIRING DIAGRAMS . With door lock control switch in lock position, continuity should exist. With door lock control switch in unlock position, continuity should not exist.
- Connect ohmmeter between terminals No. 16 (White/Black wire) and No. 17 (Light Green/Red wire) of power window master switch connector (component side). See WIRING DIAGRAMS . With door lock control switch in unlock position, continuity should exist. With door lock control switch in lock position, continuity should not exist. If continuity is not as specified, replace door lock control switch and retest system operation.
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.