Lexus 2013 IS250, Owner'S Manual

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4-5. Using the driving support systems
4
Driv
in
g
IS250_EE(OM53B11E)
CAUTION

When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are
in front of you.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning (

P. 232) will not be activated, and a fatal or serious acci-
dent may result.

Vehicles that cut in suddenly

Vehicles traveling at low speeds

Vehicles that are not moving

Vehicles with small rear ends (trailers with no load on board etc.)

Motorcycles traveling in the same lane

Conditions under which the vehicle-to-vehicle distance control may not func-
tion correctly
Apply the brakes as necessary in the following conditions as the radar sensor
may not be able to correctly detect vehicles ahead, and a fatal or serious acci-
dent may result:

When water or snow thrown up by a the surrounding vehicles hinders the
functioning of the sensor

When your vehicle is pointing upwards (caused by a heavy load in the trunk
etc.)

When the road curves or when the lanes are narrow

When steering wheel operation or your position in the lane is unstable

When the vehicle ahead of you decelerates suddenly

Handling the radar sensor
Observe the following to ensure the cruise control system can function effec-
tively.
Otherwise, the system may not function correctly and could result in an acci-
dent.

Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or dam-
age them.

Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunction. If
the sensor or surrounding area is subject to a strong impact, always have the
area inspected and adjusted by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.

Do not disassemble the sensor.

Do not attach accessories or stickers to the sensor, grille cover or surrounding
area.

Do not modify or paint the sensor and grille cover.

Do not replace them with non-genuine parts.