2008 Lexus LS 460 Owners Manual - Page 245

2-3. Operating the lights and windshield wipers n "AUTO" mode (vehicles with rain-sensing windshield wipers) 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. The sensitivity of sensor can be adjusted by turning the knob. Decreases the sensitivity (-) Increases the sensitivity (+) 2 When driving If the wiper switch is turned to "AUTO" position while the "ENGINE START STOP" switch is in IGNITION ON mode, the wiper will operate once to show that "AUTO" mode is activated. n If no windshield washer fluid sprays Check that the washer nozzles are not blocked and if there is washer fluid in the windshield washer fluid reservoir. n Headlight cleaner linked operation (if equipped on headlight cleaner) When the windshield washer is operated with the headlights on, the headlight cleaner will operate once. CAUTION n Caution regarding the use of windshield wipers in "AUTO" mode 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. 179