Lexus CT 200h Owner's Manual page 280

2-4. Using other driving systems
CAUTION
When the sensor may not be correctly detecting the vehicle ahead
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Apply the brakes as necessary in any of the following situations.
When water or snow thrown up by the surrounding vehicles hinders the function-
●
ing of the sensor
When your vehicle is pointing upwards (caused by a heavy load in the luggage
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compartment etc.)
Vehicles that cut in suddenly
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Vehicles with small rear ends (trailers with no load on board etc.)
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Motorcycles traveling in the same lane
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Handling the radar sensor
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Observe the following to ensure the pre-collision system can function effectively:
Keep the sensor and front grille cover clean at all times.
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Clean the sensor and front 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.
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If the sensor moves even slightly off position, the system may become inaccurate
or malfunction. If the sensor 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.
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Do not attach accessories or stickers to the sensor, grille cover or surrounding
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area.
Do not modify or paint the sensor and grille cover.
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