2003 Lexus LS 430 Owners Manual - Page 269

STARTING AND DRIVING If a vehicle is detected ahead of you: 2 Deceleration cruising function: If a slower moving vehicle is detected ahead of you, your vehicle cruising speed decreases within the range of about 40 km/h (25 mph) to about 135 km/h (85 mph). The multi−information display shows the preset speed, the detected vehicle ahead and selected vehicle−to−vehicle distance. If your vehicle gets closer to the vehicle ahead because of insufficient automatic deceleration, then the warning tone warns you to also manually apply brakes. Follow−up cruising function: After deceleration, your vehicle cruising speed changes in proportion to the speed of the vehicle ahead to maintain an appropriate distance from your vehicle to the vehicle ahead. The vehicle−to−vehicle distance can be changed. For details, see "Changing vehicle−to−vehicle distance setting" on page 264. Acceleration cruising function: If the vehicle ahead changes lanes, your vehicle cruising speed will be gradually increased up to the preset speed, and your vehicle resumes fixed−speed cruising. 31L157b 3 "Dynamic laser cruise control operations The dynamic laser cruise control function operates automatically and depending on whether a vehicle is detected ahead may change the speed of your vehicle as follows: If no vehicle is running ahead of you: 1 Cruising at a fixed speed: If there is no vehicle detected ahead, your cruising speed is maintained at the preset speed from about 45 km/h (28 mph) to about 135 km/h (85 mph). The preset speed is displayed in the multi−information display. For the vehicle speed setting, see "Setting operation " on page 259. 4 CAUTION Under certain conditions where the vehicle in front slows drastically, or is stopped, the dynamic laser cruise control will neither warn you nor decelerate. The driver must depress the brake pedal to slow down, ensuring collision avoidance or that sufficient vehicle−to−vehicle distance is maintained. 255