Lexus 2003 LS Owner's 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.
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.
254
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
The dynamic laser cruise
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.
control is not a