Lexus GS430 User Manual page 474

STARTING AND DRIVING
Pre−collision sensor
The millimeter wave radar sensor detects vehicles or
objects near or on the road your vehicle is traveling and
determines the possibility of a collision based on the
object position, vehicle speeds and the course you are
traveling.
The pre−collision sensor will operate when the vehicle speed
is about 5 km/h (3 mph) or over.
G31019a
" 1 Millimeter wave grille cover
2 Millimeter wave radar sensor
The millimeter wave radar sensor is installed in the front grille
of the hood.
The millimeter wave radar sensor cannot detect plastic objects
such as pylons, and may not detect people, animals, bicycles,
motor cycles, trees, snowbanks, etc. as objects with which
your vehicle may collide.
450
CAUTION
To ensure that pre−collision system will function
properly while driving, observe the following. Failure to
follow these instructions
effectiveness of the pre−collision system in case of
vehicle accident:
D Always keep the millimeter wave radar sensor and
grille cover clean. When cleaning, use a soft cloth
and be careful not to damage the sensor and grille
cover.
D Avoid strong impacts around the millimeter wave
radar sensor. An incorrect millimeter wave radar
sensor alignment will result in system malfunction.
A special device is required to adjust the millimeter
wave radar sensor alignment. Be sure to have the
sensor adjusted by your Lexus dealer.
D Do not disassemble the millimeter wave radar
sensor.
D Do not affix a sticker (including a transparent sticker)
or attach an accessory around the millimeter radar
sensor or the grille cover.
D Do not modify or paint the grille cover.
replacing the grille cover, be sure to use a genuine
grille cover.
could reduce the
When