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
How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2004 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Troubleshoot in accordance with the procedures in the following.
- VEHICLE BROUGHT TO WORKSHOP
- CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See CUSTOMER PROBLEM ANALYSIS CHECK )
- PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
- PERFORM TROUBLESHOOTING
- Pre-check (See PRE-CHECK )
- Circuit inspection (See AUTO UP/DOWN FUNCTION DOES NOT OPERATE - See POWER WINDOWS DO NOT OPERATE AT ALL )
- ADJUST, REPAIR OR REPLACE
- RESET POWER WINDOW MOTOR
- If any of the power window switch illuminations is blinking after repair, reset the power window.
- Turn the ignition switch ON.
- Open the driver side door glass.
- Fully pull up the AUTO switch of the power window master switch until the door glass fully closed.
- Check that the AUTO UP/DOWN function operates normally.
END
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.