2005 Lexus LS 430 Owners Manual - Page 378

STARTING AND DRIVING 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. D On steep downhill slopes: If there is no vehicle detected ahead, the preset speed will be easily exceeded because of inefficient engine braking, resulting in serious injury or death. (In this case, automatic braking will not work.) If there is a vehicle detected ahead, the delay in deceleration timing could cause serious injury or death. D When the warning tone sounds frequently (because acceleration or deceleration was repeated or sufficient vehicle−to−vehicle distance was not maintained), an appropriate vehicle speed cannot be attained, resulting in serious injury or death. D On roads with steep and short inclines and declines, failure to detect the vehicle ahead will shorten the distance between your vehicle and the vehicle ahead, resulting in serious injury or death. 339