2004 Lexus LS 430 Owners Manual - Page 391

STARTING AND DRIVING BRAKE PAD WEAR LIMIT INDICATORS 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 front seat 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. 13L338 Pre-collision sensor " 1 Master warning light 2 Brake pad wear warning message When your brake pads are worn enough to require replacement, the warning tone sounds, the master warning light flashes and the brake pad wear warning message in the multi-information display appears. If the warning message appears while driving, have the brake pads checked and replaced by your nearest Lexus dealer immediately. Continuous driving without replacing the brake pads will cause expensive rotor damage and increasing brake pedal effort to get the same stopping distance. 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.) 371