Lexus LX 570 2009, Manual

Page: 272 / 740

272
2-4. Using other driving systems
LX570_U (OM60D99U)
Pre-Collision System (if equipped)
Radar sensor
Detects vehicles or other obsta-
cles on or near the road ahead and
determines whether a collision is
imminent based on the position,
speed, and heading of the obsta-
cles.
When traveling on a road with very light traffic and very little to reflect the radar
waves emitted by the radar sensor, the system may decide that the radar sensor
is dirty, even if the sensor is not actually dirty. The system will automatically
restore itself when reflected radar waves are detected.
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 (front seats only)
The seat belts are immediately retracted as the effect of the pretensioner is
increased (

P. 88), to help prepare the driver and passengers. In the
event of sudden braking or skidding, the system will operate even if no
obstacle has been detected.
■
Pre-collision brake assist
Applies greater braking force in relation to how strongly the brake pedal is
depressed.
■ Pre-collision AVS
If the system determines that the collision is unavoidable, the operation of
AVS (

P. 253) helps prevent the vehicle front from going down when
hard brakes are applied.