Anti-Theft System
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
To deter theft of the vehicle, the anti-theft system is designed to sound an alarm if any of the doors or hood is forcibly unlocked or the battery terminal is disconnected and then reconnected while the vehicle is locked. The alarm blows the vehicle's horn and intermittently flashes the headlights, taillights and other exterior lights.