2004 Lexus LS 430 User Guide - Page 389
2004 Lexus LS 430 Manual
Page 389 highlights
STARTING AND DRIVING Pre-collision seat belts (Front seat belts only) When the pre- collision sensor detects an object or vehicle with which your vehicle might collide and determines that a collision may be unavoidable, the seat belts are quickly drawn back by the retractors to enhance the effects of the seat belt pretensioners. The pre- collision seat belts also work as well when hard braking. The pre- collision seat belts 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. D When the approaching speed in regard to the object or the vehicle exceeds about 30 km/h (18 mph). D When the front seat occupants wear the seat belts. Pre-collision brake assist system When the pre- collision sensor detects an object or vehicle with which your vehicle might collide, and determines that a collision may be unavoidable, depressing the brake pedal provides more powerful braking according to the amount of pedal depression. The pre- collision brake assist system will operate in the following conditions: D When the ignition switch is turned on. D When the approaching speed in regard to the object or the vehicle exceeds about 30 km/h (18 mph). D When the brake pedal is depressed. If the brake pedal is kept depressed before the sensor's determination of unavoidable collision, the pre-collision brake assist system will operate soon after the sensor 's determination. 371