Pre-Collision System With Camera Sensor - Lexus LS460 2008 Owner's Manual

2-4. Using other driving systems
Pre-Collision System with camera sensor (if equipped)
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.
■
Pre-collision seat belts
The front seat belts are immediately retracted as the effect of the preten-
sioner is increased (P. 79) to help prepare the driver and front passen-
ger. In the event of sudden braking or skidding, the system will operate
even if no obstacle has been detected.
However, the system will not operate in the event of skidding when the
TRAC/VSC systems are disabled.
■
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 reduce the collision speed. Pre-collision braking can be dis-
abled using the pre-collision braking off button. (P. 219)
■
Suspension control
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
■ Steering gear control (VGRS)
When the system determines that a collision is unavoidable, the steering
gear ratio is changed to help improve the response to steering input
■ Driver monitor system
When the system determines that there is a possibility of a collision, and
the driver is not facing forward, PCS warnings are given in advance to
warn the driver. In some circumstances, the brakes will be applied briefly
to give a sensory warning to the driver (pre-collision alert braking).
(P. 220)
218