Lexus IS250 U Owner's Manual page 251

CAUTION
Limitations of the pre-collision system
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Do not overly rely on the pre-collision system. Always drive safely, taking care to
observe your surroundings and checking for any obstacles or other road hazards.
Failure to do so may cause an accident resulting in death or serious injury.
Handling the radar sensor
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Observe the following to ensure the pre-collision system can function effectively.
Otherwise, the system may not function correctly and could result in an accident.
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 damage
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 sen-
sor or surrounding area is subject to a strong impact, always have the area inspected
and adjusted by your Lexus dealer.
Do not disassemble the sensor.
●
Do not attach accessories or stickers to the sensor, grille cover or surrounding area.
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Do not modify or paint the sensor and grille cover.
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Do not replace them with non-genuine parts.
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Cautions regarding the assist contents of the system
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By means of alarms and brake control, the pre-collision system is intended to assist the
driver in avoiding collisions through the process of LOOK-JUDGE-ACT. There are
limits to the degree of assistance the system can provide, so please keep in mind the
following important points.
Assisting the driver in watching the road
●
The pre-collision system is only able to detect obstacles directly in front of the vehicle,
and only within a limited range. It is not a mechanism that allows careless or inatten-
tive driving, and it is not a system that can assist the driver in low-visibility conditions. It
is still necessary for the driver to pay close attention to the vehicle' s surroundings.
Assisting the driver in making correct judgment
●
When attempting to estimate the possibility of a collision, the only data available to
the pre-collision system is that from obstacles it has detected directly in front of the
vehicle. Therefore, it is absolutely necessary for the driver to remain vigilant and to
determine whether or not there is a possibility of collision in any given situation.
Assisting the driver in taking action
●
The pre-collision system' s braking assist feature is designed to help reduce the sever-
ity of a collision, and so only acts when the system has judged that a collision is
unavoidable. This system by itself is not capable of automatically avoiding a collision
or bringing the vehicle to a stop safely. For this reason, when encountering a danger-
ous situation the driver must take direct and immediate action in order to ensure the
safety of all involved.
IS350/250_U (OM53C50U)
4-5. Using the driving support systems
251
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