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.
2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Section 153 (Power Windows)
WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Adjustments
- Trouble Shooting
- Connector Identification
- Circuit Tests
- Jam Protection Limit Switch Circuit (Front)
- Jam Protection Limit Switch Circuit (Rear)
- Jam Protection Pulse Switch Circuit (Front)
- Jam Protection Pulse Switch Circuit (Rear)
- Power Window Master Switch Circuit (Driver)
- Power Window Switch Circuit (Passenger)
- Power Window Switch Circuit (Rear)
- Power Window Motor Circuit (Front)
- System Tests
- Notes
- Test A: Window Does Not Operate With Power Window Master Switch (Manual Or Automatic Operation Can Not Be Performed)
- Test B: Remote Control Of All Windows (Except Driver's) Does Not Function With Master Switch (Windows Operate Normally With Each Master Switch)
- Test C: Key Related Power Window Operation Does Not Operate With Driver Side Door Key Cylinder (Master Switch Operation Is Normal)
- Test D: Power Window Does Not Operate With Multi-Function Transmitter (Windows Operate Normally With Master Switch)
- Test E: Window Moves Down Without Being Ordered During Up Operation
- Component Tests
- Jam Protection Limit Switch (Front)
- Jam Protection Limit Switch (Rear)
- Jam Protection Pulse Switch (Front)
- Jam Protection Pulse Switch (Rear)
- Power Window Master Switch
- Power Window Master Switch Illumination (Driver)
- Power Window Motor (Front)
- Power Window Motor (Rear)
- Power Window Motor PTC Operation (Front)
- Power Window Motor PTC Operation (Rear)
- Power Window Switch (Passenger & Rear)
- Power Window Switch Illumination (Passenger)
- Relays
- Pin Voltage Tests
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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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