Lexus 2012 RX450h Owner's Manual page 281

2-3. Operating the lights and windshield wipers
Increases the intermittent
windshield wiper frequency
Decreases the intermittent
windshield wiper frequency
2
Washer/wiper dual operation
The wipers will automatically
operate a couple of times after
the washer squirts.
If the headlights are on, the
headlight cleaners will operate
once.
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