2011 Lexus RX 350 Owners Manual - Page 272

2-3. Operating the lights and windshield wipers n Raindrop sensor (vehicles with rain-sensing windshield wipers) l The raindrop sensor judges the amount of raindrops. An optical sensor is adopted. It may not operate properly when sunlight from the rising or setting of the sun intermittently strikes the windshield, or if bugs etc. are present on the windshield. l If the wiper switch is turned to the position while the "ENGINE START STOP" switch is in IGNITION ON mode, the wipers will operate once to show that "AUTO" mode is activated. the wipers will operate once to indicate that the sensor sensitivity is enhanced. l When the sensor sensitivity ring is turned toward high while in "AUTO" mode, l If the temperature of the raindrop sensor is 194°F (90°C) or higher, or 5°F (-15°C) or lower, automatic operation may not occur. In this case, operate the wipers in any mode other than "AUTO". n If no windshield washer fluid sprays Check that the washer nozzles are not blocked if there is washer fluid in the windshield washer fluid reservoir. CAUTION n Caution regarding the use of windshield wipers in "AUTO" mode (vehicles with rain-sensing windshield wipers) 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. 200