2013 Lexus ES 350 Owners Manual - Page 212

4-3. Operating the lights and wipers Rain-sensing windshield wipers 1 2 Temporary operation Rain-sensing wiper operation (AUTO) Low speed operation High speed operation When AUTO is selected, the wipers will operate automatically when the sensor detects falling rain. The system automatically adjusts wiper timing in accordance with rain volume and vehicle speed. 3 4 The sensor sensitivity can be adjusted when AUTO is selected. 5 6 Increases the sensitivity Decreases the sensitivity 7 Washer/wiper dual operation Wipers will automatically operate a couple of times after the washer squirts.