2006 Lexus GS 300 Owners Manual - Page 1051

STARTING AND DRIVING CAUTION Certain conditions make vehicle detection difficult or impossible. D As this system operates by detecting primarily the reflected wave from the rear end of the vehicle ahead, the distance cannot be accurately detected in the following cases, resulting in improper vehicle−to−vehicle distance. ♦ The rear section of the vehicle ahead is extremely small such as an unloaded trailer. ♦ The vehicle ahead or other vehicles around you are flinging up water or snow. ♦ Heavy luggage which is loaded in your trunk or on top of your rear seats is raising up the nose of your vehicle. D The millimeter wave radar sensor automatically detects dirt if it is sticking to the front of the sensor or cover of your vehicle, and if detected, a message appears on the multi−information display. However, if the sensor or cover is covered with a metallic vinyl bag, icicle, snowflakes, etc., dirt may not be detected, resulting in improper vehicle−to−vehicle distance. Continue driving with due care to the vehicle ahead. If dirt is detected, the dynamic radar cruise control function is automatically cancelled. Always keep the sensor and cover clean. Dynamic radar cruise control should not be used in the following conditions, to avoid death or serious injury. D In bad weather (such as rain, fog, snow, sandstorms, or when raindrops or snowflakes get in the millimeter wave radar sensor or the cover), the vehicle−to−vehicle distance will not be measured accurately. If the wipers are operated at high speed (including the high speed operation with the wiper lever in the "AUTO" position), dynamic radar cruise control is automatically cancelled. (In the case of the low speed operation and intermittent wiper operation, it is not cancelled.) Dynamic radar cruise control is automatically cancelled when the measurement is extremely unstable due to bad weather. D On the roads in heavy traffic or at sharp bends: As an appropriate speed cannot be maintained, death or serious injury could result. D On slippery road surfaces (icy or snow−covered road surfaces): The tires will race and you will be unable to control. 405