2003 Lexus LS 430 Owners Manual - Page 268

STARTING AND DRIVING To change to the vehicle−to−vehicle distance control mode from the conventional (fixed speed) cruise control mode, push the lever in the "MODE" direction for longer than about 1 second. Vehicle−to−vehicle distance control mode The laser radar sensor in this system primarily detects the reflectors of the vehicle ahead of you to determine the presence of the vehicle ahead as well as measuring the vehicle−to−vehicle distance. The detection range of the sensor is about 120 m (400 ft.) ahead. When the dynamic laser cruise control is on, the driving pattern (PWR, normal, snow) of the automatic transmission is fixed in the normal position, regardless of the position of the selector switch. CAUTION In the conventional (fixed speed) cruise control mode, a warning tone does not sound to warn you if you are too close to the vehicle ahead, as neither the presence of the vehicle ahead nor the vehicle−to−vehicle distance is detected. Pay special attention to the distance between your vehicle and the vehicle ahead. Always confirm the setting in the multi−information display. For the vehicle−to−vehicle distance control mode, see the following description. For the conventional (fixed speed) cruise control mode, see page 270. CAUTION The dynamic laser cruise control is not a collision−avoidance system and will not prevent accidents. The dynamic laser cruise control is a vehicle speed control device that is intended for use only on freeways or roads where the traffic is light or moderate. To avoid serious injury, you must use caution and be attentive to road and traffic conditions while using dynamic laser cruise control. 254