Lexus LS600h - Page 415

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4-5. Using the driving support systems
4
Driving
LS600h/LS600hL_EE(OM50D61E)
*: For vehicles with a foldable head restraint, driver’s seat only.
The rear radar sensor detects
objects approaching from behind
and determines whether a rear-
end collision is imminent based
on the position, speed and head-
ing of the object before it hap-
pens.
 System operating conditions
When the power switch is in ON mode and there is a possibility of a rear-end
collision due to a vehicle in the same lane approaching from the rear, the sys-
tem operates if all of the following conditions are met:
 Warning for the approaching vehicle (emergency flashers):
• The relative speed difference between your vehicle and the vehicle
approaching from behind is greater than about 15 km/h (9 mph).
• When the vehicle is stationary or moving forward while the brake pedal
is depressed.
• When the turn signal lights and emergency flashers are off.
 Whiplash mitigation (pre-crash intelligent head restraints):
• The relative speed difference between your vehicle and the vehicle
approaching from behind is greater than about 15 km/h (9 mph).
• Your vehicle is stopped or moving forward.
 Whiplash mitigation
The pre-crash intelligent head restraint may not stop in the proper position if
a hat is worn or the occupant's hair is bound at the back.
Rear radar sensor