Lexus LS460 2011 Owner's Manual page 387


System operating conditions
When the "ENGINE START STOP" switch is in IGNITION 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 system operates if all of the following condi-
tions are met.

The speed at which the vehicle behind you is approaching your vehicle
exceeds about 15 km/h (9 mph).

The vehicle is stopped or moving forward.

Conditions in which it is hard for the sensor to detect objects
The rear pre-crash safety system is not a system that can detect all possible
rear-end collisions. There are cases when the system does not detect bicy-
cles, motorcycles, etc. As the system may not operate under the following
conditions, always be aware of the surrounding conditions.

When driving on rough roads, uneven surfaces, etc., and there is signifi-
cant up and down vehicle movement.

The road has curves or is bumpy.

A rear-end collision occurs from an angle or a position that is to the left
or right of the vehicle center.

Raindrops, ice or snow are attached to the rear bumper.

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.

Conditions that may trigger the system even if there is no danger of a rear-
end collision

Another vehicle drives past right behind your vehicle when your vehicle
is stopped to turn right or left.

Another vehicle drives past right beside your vehicle when your vehicle
is stopped on the side of the road.

The vehicle behind you passes your vehicle from a short distance while
driving.

The vehicle behind you approaches your vehicle rapidly to a close dis-
tance while driving or stopped.

When there is a malfunction in the system
Warning light will flash and/or warning messages will turn on. (P. 687,
696)
LS460_EE
2-4. Using other driving systems
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