2005 Lexus LS 430 Owners Manual - Page 414

STARTING AND DRIVING PRE−COLLISION SAFETY SYSTEM (Vehicles with dynamic radar cruise control) When the pre−collision safety system detects what it perceives to be an unavoidable collision, the front seat belts are quickly drawn back by the retractors (pre−collision seat belts) and more powerful braking is applied according to the amount of pedal depression to help reduce injury to the occupants and damage to the vehicle body. In addition, the electronically modulated air suspension works to help regulate the vehicle not to pitch forward so much. 31L359a Pre−collision sensor The millimeter wave radar sensor detects vehicles or objects near or on the road your vehicle is traveling and determines the possibility of a collision based on the object position, vehicle speeds and the course you are traveling. The pre − collision sensor will operate in the following conditions: D When the ignition switch is turned on. D When the vehicle speed is about 5 km/h (3 mph) or over. (The pre−collision safety system does not work with the vehicle stopped.) " 1 Millimeter wave grille cover 2 Millimeter wave radar sensor The millimeter wave radar sensor is installed in the front grille of the hood. The millimeter wave radar sensor cannot detect plastic objects such as pylons, and may not detect people, animals, bicycles, motor cycles, trees, snowbanks, etc. as objects with which your vehicle may collide. 375