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
Remote Transmitter
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Remove battery and replace with new battery. See REMOTE TRANSMITTER BATTERY REPLACEMENTΒ under REMOVAL & INSTALLATION. If new battery is not available, connect 2 new 1.5-volt batteries in series. Using jumper wires, connect positive lead to positive (side) terminal of remote transmitter and connect negative lead to negative (bottom) terminal of remote transmitter. See Fig 1.
- Stand about 3 feet from outside door handle on driver door. Point remote transmitter toward vehicle. Depress any remote transmitter button for about one-second. If doors or luggage compartment respond properly, remote transmitter is okay. Check condition of original battery. See REMOTE TRANSMITTER BATTERY CHECKΒ . If doors or luggage compartment do not respond properly, replace remote transmitter.
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.
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