2006 Lexus GS 300 Owners Manual - Page 1097

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 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. In the following conditions, the seat belts are quickly drawn back by the retractors regardless of the possibility of the collision: D When the vehicle is spinning or cannot take a turn properly at more than about 15 km/h (10 mph). 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 when the following all conditions are met. D When the vehicle speed is about 30 km/h (18 mph) or over. D When the brake pedal is depressed. D When the approaching speed in regard to the object or the vehicle exceeds about 30 km/h (18 mph). 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. 451