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Lexus GS430 - Page 475

Lexus GS430
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STARTING AND DRIVING
451
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 precollision seat belts will operate in the following
conditions:
When the approaching speed in regard to the object or the
vehicle exceeds about 30 km/h (18 mph).
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:
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 precollision brake assist system will operate when the
following all conditions are met.
When the vehicle speed is about 30 km/h (18 mph) or over.
When the brake pedal is depressed.
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 precollision brake
assist system will operate soon after the sensor’s
determination.

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