Lexus IS250 2009, Service Manual

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179
2-4. Using other driving systems
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When drivin
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CAUTION
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Conditions under which the vehicle-to-vehicle distance control may not function
correctly
Apply the brakes as necessary in the following conditions as the radar sensor may
not be able to correctly detect vehicles ahead, and an accident may result.
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When water or snow thrown up by the surrounding vehicles hinders the function-
ing of the sensor
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When your vehicle is pointing upwards (caused by a heavy load in the trunk, etc.)
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When the road curves or when the lanes are narrow
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When steering wheel operation or your position in the lane is unstable
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When the vehicle ahead of you decelerates suddenly
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Handling the radar sensor
Observe the following to ensure the cruise control system can function effectively:
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Keep the sensor and front grille clean at all times.
Clean the sensor and front grille with a soft cloth so you do not mark or damage
them.
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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 a Lexus dealer.
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Do not disassemble the sensor.
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Do not attach accessories or stickers to the sensor, grille or surrounding area.
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Do not modify or paint the sensor and grille.
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To ensure the radar sensor functions correctly
Do not do the following to the sensor or grille cover as doing so may cause the sen-
sor not to function correctly and could result in an accident.
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Stick or attach anything to them
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Leave them dirty
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Disassemble, subject them to strong shocks
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Modify or paint them
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Replace them with non-genuine parts