Toyota LEXUS LS430 2005 Manual page 353

STARTING AND DRIVING
If no vehicle is running ahead of you:
Cruising at a fixed speed: If there is no vehicle detected
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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 340.
If a vehicle is detected ahead of you:
Deceleration cruising function: If a slower moving
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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
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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.
vehicle−to−vehicle distance can be changed. For details,
see "Changing vehicle−to−vehicle distance setting" on
page 346.
Acceleration cruising function: If the vehicle ahead
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changes lanes, your vehicle cruising speed will be
gradually increased up to the preset speed, and your
vehicle resumes fixed−speed cruising.
334
Under certain conditions where the vehicle in front
slows drastically, or is stopped, the dynamic radar/laser
cruise control will neither warn you nor decelerate. The
driver must depress the brake pedal to slow down,
ensuring collision
vehicle−to−vehicle distance is maintained.
When vehicle−to−vehicle distance control mode is activated,
you must still be attentive to road and traffic conditions. Should
your vehicle speed decrease below about 40 km/h (25 mph),
the dynamic radar/laser cruise control will shut off, requiring
you to apply the brakes to slow. When a vehicle ahead slows
suddenly, stops or a vehicle cuts in front, the system may slow
your vehicle abruptly, but the automatic braking will cease if the
speed decreases below about 40 km/h (25 mph) requiring the
driver's manual application of brakes.
The
CAUTION
avoidance or that sufficient