2004 Lexus LS 430 User Guide 2 - Page 348

STARTING AND DRIVING D The laser radar sensor automatically detects dirt if dirt is sticking to the sensor glass of your vehicle, and if detected, a message is shown on the multi-information display. However, if the glass sensor is covered with a transparent or translucent vinyl bag, icicle, 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 laser cruise control function is automatically cancelled. Always keep the sensor glass clean. CAUTION D Dynamic laser cruise control should not be used in the following conditions, to avoid serious injury or death. D In bad weather (such as rain, fog, snow, sandstorms or direct sunlight, or when raindrops or snowflakes get in the laser radar sensor glass), the vehicle-to-vehicle distance will not be measured accurately. If the wipers are operated at high or low speeds (including the high and low speed operation with the wiper lever in the "AUTO" position), dynamic laser cruise control is automatically cancelled. (In the case of intermittent wiper operation, it is not cancelled.) Dynamic laser 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, serious injury or death could result. D On slippery road surfaces (icy or snow-covered road surfaces): The tires will race and you will be unable to control. 330