4
4-5. Using the driving support systems
Driving
Q The system can be operated when
O The engine switch is in ON.
O Lexus parking assist-sensor function is
on.
O The vehicle speed is less than about 10
km/h (6 mph).
O The shift lever is in other than P.
Q If “Parking Assist Unavailable” is dis-
played on the multi-information display
O A sensor may be covered with water
drops, ice, snow, dirt, etc. Remove the
water drops, ice, snow, dirt, etc., from the
sensor to return the system to normal.
Also, due to ice forming on a sensor at
low temperatures, a warning message
may be displayed or the sensor may not
be able to detect an object. Once the ice
melts, the system will return to normal.
If a warning message is displayed even if
the sensor is clean, there may be a sensor
malfunction. Have the vehicle inspected
by your Lexus dealer.
O Water may be continuously flowing over
the sensor surface, such as in a heavy
rain. When the system determines that it
is normal, the system will return to nor-
mal.
Q Sensor detection information
O The sensor’s detection areas are limited
to the areas around the vehicle’s front
and rear bumpers.
O The following situations may occur
during use.
• Depending on the shape of the object
and other factors, the detection distance
may shorten, or detection may be impos-
sible.
• Detection may be impossible if static
objects draw too close to the sensor.
• There will be a short delay between static
object detection and display (warning
buzzer sounds). Even at low speeds,
there is a possibility that the object will
come within 30 cm (11.9 in.) before the
display is shown and the warning buzzer
sounds.
• It might be difficult to hear the buzzer due
to the volume of the audio system or air
flow noise of the air conditioning system.
• It may be difficult to hear the sound of this
system due to the buzzers of other sys-
tems.
Q Objects which the system may not prop-
erly detect
The shape of the object may prevent the
sensor from detecting it. Pay particular
attention to the following objects:
O Wires, fences, ropes, etc.
O Cotton, snow and other materials that
absorb sound waves
O Sharply-angled objects
O Low objects
O Tall objects with upper sections project-
ing outwards in the direction of your vehi-
cle
Q Situations in which the system may not
operate properly
Certain vehicle conditions and the sur-
rounding environment may affect the ability
of a sensor to correctly detect objects. Par-
ticular instances where this may occur are
listed below.
O There is dirt, snow, water drops or ice on
a sensor. (Cleaning the sensors will
resolve this problem.)
O A sensor is frozen. (Thawing the area will
resolve this problem.)
In especially cold weather, if a sensor is
frozen the sensor display may be dis-
played abnormally, or objects, such as a
wall, may not be detected.
O When a sensor or the area around a sen-
sor is extremely hot or cold.
O When using steam to clean the vehi-
cle, do not direct steam too close to
the sensors as doing so may cause a
sensor to malfunction.
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