Lexus 2008 IS250 Owner's Manual page 149

Rain drop sensor (vehicles equipped with the rain-sensing windshield wipers)
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Outside rear view mirror defogger activation linked to windshield wiper opera-
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tion
The outside rear view mirror defogger automatically turns on when you operate the
windshield wipers.
If no windshield washer fluid sprays
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Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
Customization that can be configured at Lexus dealer
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Settings (e.g. drip prevention function) can be changed. (Customizable features
P. 436)
CAUTION
Caution regarding the use of windshield wipers in "AUTO" mode
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The windshield wipers may operate unexpectedly if the sensor is touched or the
windshield is subject to vibration in "AUTO" mode. Take care that your fingers or
anything else do not become caught in the windshield wipers.
2-3. Operating the lights and windshield wipers
The sensor judges the amount of raindrops.
2
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