Toyota Lexusc Owner's Handbook Manual page 496

CAUTION
Braking control will not ensure that your vehicle will
reduce speed appropriately. You must depress the
brake pedal to slow down, ensuring collision avoidance
or that sufficient vehicle-to-vehicle
maintained.
(j) Approach warning
While you are cruising in the vehicle-to-vehicle distance
control mode, if the vehicle ahead decelerates abruptly or if
another vehicle cuts in ahead of you, inadequate braking will
make your vehicle become closer to the vehicle ahead of you
and the display will flash and beep.
distance is
D If the display flashes and beeps, you must depress
the brake pedal to slow down to avoid a collision or
maintain sufficient vehicle-to-vehicle distance.
D In the following conditions, the approach warning
may not turn on even if the vehicle drives closer to the
vehicle ahead, and an accident may occur:
Your vehicle and the vehicle ahead are cruising at
almost the same speed.
The vehicle ahead is cruising at a faster speed than
yours.
become longer.)
The vehicle ahead is at a stop or driving very slowly.
Pay special attention to a very slow vehicle at the end
of the line in heavy traffic or at a tollgate.
The speed has just been set.
The accelerator pedal is depressed or has just been
released.
STARTING AND DRIVING
CAUTION
(The distance between the vehicles will
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