2010 Lexus RX 450h User Guide 2 - Page 213

2-3. Operating the lights and windshield wipers Rain-sensing windshield wipers (if equipped) When 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. When is selected, the sensor sensitivity can be adjusted as follows by turning the switch ring: Off Rain-sensing wiper operation Low speed wiper operation High speed wiper operation Temporary operation 2 When driving Sensor sensitivity (high) Sensor sensitivity (low) 215