2006 Lexus GS 300 Owners Manual - Page 699

SWITCHES Automatic operation* The wiper speed is determined by the vehicle speed and the amount of raindrops and sunlight detected by the automatic wiper control sensor. Twist the automatic control adjuster in the "-" direction to lower the sensitivity, and the "+" direction to boost the sensitivity. With the engine switch turned off, if the windshield sensor is touched by reason of cleaning the windshield or for any other reason, either of the following operations may cause automatic wiper activation. D Turning the engine switch on with the wiper lever in the "AUTO" position. D Turning the engine switch on and move the wiper lever down in the "AUTO" position. Even with the wiper lever in the "AUTO" position, the system will switch to intermittent operations if the system malfunctions. G12009 The system will turn off if the windshield gets extremely hot (at more than 80_C or 176_F) or cold (at less than -10_C or 14_F). When the engine switch is turned off with the wiper lever in the "AUTO" position, and then the engine switch is turned on again, the automatic operation may not work even if raindrops are on the windshield. In this case, move the lever to another position and return it to the "AUTO" position again. The sensor is on the inside of the windshield as shown above. NOTE: *Automatic operation can be changed to an intermittent operation. Ask your Lexus dealer for details. 53