Pre-Collision System - Lexus LS460 Owners Book

2-4. Using other driving systems

Pre-Collision System

Safety systems such as the brakes and seat belts are automatically
engaged to lessen impact and injuries to occupants as well as vehicle dam-
age when the radar sensor detects an unavoidable frontal collision.
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Pre-collision seat belts
If the pre-collision sensor detects that a collision is unavoidable, the pre-
collision system will retract the seat belt before the collision occurs.
The same will happen if the driver makes an emergency braking or loses
control of the vehicle. (P. 94)
However, the system will not operate in the event of skidding when the
TRAC/VSC systems are disabled.
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Pre-collision brake assist
When there is a high possibility of a frontal collision, the system applies
greater braking force in relation to how strongly the brake pedal is
depressed.
■ Pre-collision braking
When there is a high possibility of a frontal collision, the system warns the
driver using a warning light, warning display and buzzer. If the system
determines that a collision is unavoidable, the brakes are automatically
applied to help reduce the collision speed. Pre-collision braking can be
disabled using the pre-collision braking off switch. (P. 294)
■
Suspension control (If equipped)
When the system determines that a collision is unavoidable, the suspen-
sion switches to "SPORT" mode to help prevent the front of the vehicle
from dropping when the brakes are applied suddenly.
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2
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: If equipped
295