2011 Lexus IS 350 User Guide - Page 174

2-3. Operating the lights and windshield wipers Washer/wiper dual operation Wipers operate automatically. (After operating several times, the wipers operate one more time after a short delay to prevent dripping.) 2 Rain-sensing windshield wipers When is selected, the wipers will operate automatically when the sensor detects falling rain. The system automatically adjusts wiper timing in according to rain volume and vehicle speed. When is selected, the sensor sensitivity can be adjusted as follows by turning the switch ring: Off Rain-sensing windshield wiper operation Low speed windshield wiper operation High speed windshield wiper operation Temporary operation When driving 181