2017 LEXUS LS600H sensor

3604-5. Using the driving support systems
LS600h/LS600hL_EE(OM50G20E)
◆Warning for the approaching vehicle (emergency flashers)
When the system determines that there is a risk of a rear-end collision,
the emergency flashers flash to warn the driver of the vehicle
approaching from the rear.
◆Whiplash mitigation (pre-crash intelligent head restraints*)
When a vehicle draws near from behind and the system has deter-
mined that the possibility of a rear-end collision is very high, the sensor
in each front head restraint detects the position of the occupant’s head
and the pre-crash intelligent head restraint moves, contributing to
whiplash mitigation when a rear-end collision occurs.
*: For vehicles with a foldable head restraint, driver’s seat only.
Rear Pre-Crash Safety system
: If equipped
When the radar sensor detects the possibility of a rear-end collision,
the rear pre-crash safety system will operate to warn the approaching
vehicle and mitigate whiplash.
Rear-end collision
possibility is high
Rear-end collision
possibility is very highCollision
Emergency
light flashers Warning for the approaching
vehicle
Pre-crash
intelligent
head
restraints
Whiplash mitigation
Before operation After operation
State of
the vehicle

3614-5. Using the driving support systems
4
Driving
LS600h/LS600hL_EE(OM50G20E)
The rear radar sensor detects
objects approaching from behind
and determines whether a rear-end
collision is imminent based on the
position, speed and heading of the
object before it happens.
■System operating conditions
When the power switch is in ON mode and there is a possibility of a rear-end colli-
sion due to a vehicle in the same lane approaching from the rear, the system oper-
ates 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 approach-
ing from behind is greater than about 30 km/h (18 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 approach-
ing 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

3624-5. Using the driving support systems
LS600h/LS600hL_EE(OM50G20E)
■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. The system may not operate in th e following situations. Always be aware of
the surrounding conditions.
●The vehicle posture is abnormal.
●The sensor may not detect objects such as bicycles and motorcycles.
●Raindrops, ice or snow are attached to the rear bumper.
●The road has curves or is bumpy.
●A rear-end collision occurs from an angle or with a large offset.
■Conditions that may trigger the system even if there is no danger of a rear-end col-
lision
●Another vehicle drives past just behind your vehicle when your vehicle is stopped
to turn right or left.
●Another vehicle drives past just 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 your vehicle
is moving.
●The vehicle behind you approaches your vehicle rapidly to a close distance while
your vehicle is moving or stopped.
■When there is a malfunction in the system
Warning lights and/or warning messages will turn on or flash. ( P. 557, 563)

3654-5. Using the driving support systems
4
Driving
LS600h/LS600hL_EE(OM50G20E)
CAUTION
■Precautions for the radar sensor and rear bumper
The rear bumper of vehicles with a rear pre-crash safety system is a functional part
that has radio wave permeability. Observe the following to ensure the system can
function effectively:
●Keep the rear bumper clean at all times.
Raindrops, ice or snow may dete riorate radar sensor performance.
●Do not subject the radar sensor or surrounding area to a strong impact.
If the sensor moves even slightly out of position, the system may malfunction. If the
sensor or surrounding area is subjected to a strong impact, always have the area
inspected and repaired by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional.
●Do not disassemble the radar sensor.
●Do not attach a towing hitch, bike holder, protective film or stickers to the center
portion of the rear bumper.
●Do not replace the rear bumper with non-genuine parts or modify it.
●For painting or repair of the rear bumper, consult with any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
■Precaution for the pre-crash intelligent head restraints
Do not put head restraint covers.

3664-5. Using the driving support systems
LS600h/LS600hL_EE(OM50G20E)
The Blind Spot Monitor is a system that has 2 functions;
●The Blind Spot Monitor function
Assists the driver in making the decision when changing lanes
●The Rear Crossing Traffic Alert function
Assists the driver when backing up
These functions use same sensors.
BSM (Blind Spot Monitor)
: If equipped
Summary of the Blind Spot Monitor
BSM main switch
Pressing the switch turns the system on or off. When the switch is set to on, the
switch’s indicator illuminates and the buzzer sounds. Common switch for Blind
Spot Monitor function and Rear Crossing Traffic Alert function.
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3674-5. Using the driving support systems
4
Driving
LS600h/LS600hL_EE(OM50G20E)
■The outside rear view mirror indicators visibility
When under strong sunlight, the outside rear view mirror indicator may be difficult to
see.
■Rear Crossing Traffic Alert buzzer hearing
Rear Crossing Traffic Alert function may be difficult to hear over loud noises such as
high audio volume.
■When there is a malfunction in the Blind Spot Monitor
If a system malfunction is detected due to any of the following reasons, warning mes-
sages will be displayed: ( P. 563)
●There is a malfunction with the sensors
●The sensors have become dirty
●The outside temperature is extremely high or low
●The sensor voltage has become abnormal
Outside rear view mirror indicators
Blind Spot Monitor function:
When a vehicle is detected in the blind spot, the outside rear view mirror indica-
tor comes on while the turn signal lever is not operated. If the turn signal lever is
operated toward the detected side, the outside rear view mirror indicator flashes.
Rear Crossing Traffic Alert function:
When a vehicle approaching from the right or left rear of the vehicle is detected,
the outside rear view mirror indicators flash.
Rear Crossing Traffic Alert buzzer (Rear Crossing Traffic Alert func-
tion only)
When a vehicle approaching from the right or left rear of the vehicle is detected,
a buzzer sounds from behind the rear seat.
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3704-5. Using the driving support systems
LS600h/LS600hL_EE(OM50G20E)
CAUTION
■Handling the radar sensor
One Blind Spot Monitor sensor is installed inside the left and right side of the vehi-
cle rear bumper respectively. Observe the following to ensure the Blind Spot
Monitor can function correctly.
●Do not subject the sensor or surrounding area on the bumper to a strong impact.
If the sensor moves even slightly off position, the system may malfunction and
vehicles that enter the detection area may not be detected. If the sensor or sur-
rounding area is subject to a strong impact, always have the area inspected by
any authorized Lexus dealer or repairer, or another duly qualified and equipped
professional.
●Do not disassemble the sensor.
●Do not attach accessories or stickers to the sensor or surrounding area on the
bumper.
●Do not modify the sensor or surrounding area on the bumper.
●Do not paint the rear bumper any color other than an official Lexus color.
●Keep the sensor and its surrounding area
on the bumper clean at all times.

3714-5. Using the driving support systems
4
Driving
LS600h/LS600hL_EE(OM50G20E)
The Blind Spot Monitor function uses radar sensors to detect vehicles that
are traveling in an adjacent lane in the area that is not reflected in the out-
side rear view mirror (the blind spot), and advises the driver of the vehicles
existence via the outside rear view mirror indicator.
The areas that vehicles can be detected in are outlined below.
The range of the detection area
extends to:
Approximately 3.5 m (11.5 ft.)
from the side of the vehicle
The first 0.5 m (1.6 ft.) from the side of
the vehicle is not in the detection area
Approximately 3 m (9.8 ft.) from
the rear bumper
Approximately 1 m (3.3 ft.) for-
ward of the rear bumper
The Blind Spot Monitor function
The Blind Spot Monitor function detection areas
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