Lexus 2003 LS Owner's Manual page 623

Lexus Park Assist System
The sensor detection range is limited
around the bumper. Be sure to confirm a
safe distance around your vehicle and
drive slowly.
If more than one obstacle is detected in
the same direction, the indicators for the
obstacle nearest to the vehicle will turn
on.
CAUTION
Do not install an accessory or the like
within the sensor detection range. Do-
ing so may cause the Lexus park assist
system to malfunction, resulting in an
accident.
108
NOTICE
D The sensors do not detect an
obstacle just under the bumper. A
short object, thin stake or the like will
be detected once but might not be
detected as your vehicle gets very
close to such an object.
D If an obstacle is very close to your
vehicle, it might not be detected.
D If a sensor is subjected to a strong
impact, it will not operate properly.
The Lexus park assist system may not
work properly in the following cases:
D When icicles, snowflakes or mud gets on
the sensors. If removed, the system will
work properly.
D When the sensor is frozen. If deiced, the
system will work properly.
D When the sensor is covered with some-
thing. If removed, the system will work
properly.
Especially in cold weather, a malfunction
warning screen may appear on the display
due to frozen sensors. If the malfunction
warning screen appears on the display, be
sure to check the sensor. If the malfunction
warning screen appears despite no mud, ice
or snowflakes on the sensor, the sensor
might have malfunctioned. Have your ve-
hicle checked by your Lexus dealer.
In the following conditions, the detection
range may be affected:
D When you stop your vehicle in scorching
sun or in cold weather.
D Foreign matter such as snowflakes or
mud gets on the sensor.
The Lexus park assist system may detect
the following by mistake:
D Bumpy roads or gravelled roads or grass
when driving on such surfaces, or on
grass
D Devices issuing ultrasonic waves, such
as a horn from another vehicle, motor-
cycle engine, air braking sound from
heavy–duty vehicles, if such a device is
operated around your vehicle
D Rain or water splashing over the sensor