2006 Lexus RX 330 Owners Manual - Page 456

STARTING AND DRIVING (l) Vehicle−to−vehicle distance control mode failure warning If "E1" appears on the display, the system cannot easily measure the vehicle−to−vehicle distance because of a dirty laser radar sensor glass. If this code appears, clean the sensor glass with a soft cloth and try setting the preset speed again. If the dirt is removed without cleaning, the system will automatically enter the ready mode. If the system does not enter the ready mode even after cleaning or the code remains on the display, the system might be malfunctioning. Although the vehicle may still be operated, please contact your Lexus dealer. 2 "CRUISE" indicator light " 1 Warning code 3 Master warning light CAUTION Always keep the sensor glass clear and never allow it to be covered with icicle or any substance, so it can detect the vehicle in front. If a system malfunction is detected when the vehicle−to−vehicle distance control mode is on, the master warning light comes on, a warning tone sounds and a warning code appears on the display. Dynamic laser cruise control is automatically cancelled. If "E3" appears on the display, the "CRUISE" indicator light in the instrument cluster also flashes. 431