2006 Lexus GS 300 Owners Manual - Page 435

STARTING AND DRIVING G13073 If the system cannot easily measure the vehicle−to−vehicle distance because of a dirty millimeter wave radar sensor or grille cover while the dynamic radar cruise control is on, the above message appears. If this message appears, clean the sensor and grille cover with a soft cloth and try setting the preset speed again. If the dirt is removed without cleaning, the system will automatically enter the "RADAR READY" mode. If the system does not enter the "RADAR READY" mode even after cleaning or the message remains on the display, the system might be malfunctioning. Although it is no problem to continue driving, contact your Lexus dealer. G13074 If the system cannot easily measure the vehicle−to−vehicle distance because of the following conditions while the dynamic radar cruise control is on, the above message appears. D The driving pattern selector switch is set to the snow position. D It is determined that it is difficult to make a measurement because of bad weather (such as extremely hot weather). D The wipers are operated at high speed with the wiper lever in the "AUTO" position. In the following cases, the dynamic radar cruise control switches to the "RADAR READY" mode: D The driving pattern selector switch is changed to the normal or power position. D The wipers are stopped or are switched to low speed or intermittent operation. (Including intermittent and stopped wipers in the "AUTO" position.) In the above conditions, press the control lever upward in the "+ RES" direction and release it. The dynamic radar cruise control will be restored, however, even after the weather clears, if the setting operation cannot be performed or if the warning message still appears, the system might have malfunctioned. Although it is no problem to continue driving, contact your Lexus dealer. 411