2018 LEXUS LS500H sensor

208 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) WARNING●
If the part of the windshield in front of
the camera sensor is fogged up or
covered with condensation or ice, use
the windshield defogger to remove the
fog, condensation or ice. ( → P.324)●
If water droplets cannot be properly
removed from the area of the wind-
shield in front of the camera sensor by
the windshield wipers, replace the
wiper insert or wiper blade.
If the wiper inserts or wiper blades need
to be replaced, contact your Lexus
dealer. ●
Do not attach window tinting to the
windshield.●
Replace the windshield if it is damaged
or cracked.
If the windshield needs to be replaced,
contact your Lexus dealer.●
Do not get the camera sensor wet.●
Do not allow bright lights to shine into
the camera sensor.●
Do not dirty or damage the camera
sensor.
When cleaning the inside of the wind-
shield, do not allow glass cleaner to
contact the lens. Also, do not touch the
lens.
If the lens is dirty or damaged, contact
your Lexus dealer.
●
Do not subject the camera sensor to a
strong impact.
●
Do not change the installation position
or direction of the camera sensor or
remove it.
●
Do not disassemble the camera sen-
sor.
●
Do not modify any components of the
vehicle around the camera sensor
(inside rear view mirror, etc.) or ceiling. ●
Do not attach any accessories that
may obstruct the camera sensor to the
hood, front grille or front bumper.
Contact your Lexus dealer. ●
If a surfboard or other long object is to
be mounted on the roof, make sure
that it will not obstruct the camera sen-
sor. ●
Do not modify the headlights or other
lights.

2094-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving
■
Pedestrian alert
When the system determines that
there is a possibility of a frontal collision
with a stationary or moving pedestrian
in front of your vehicle, a message will
be displayed on the head-up display to
warn the driver. ■
Pre-collision warning
When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes-
sage will be displayed on the
multi-information display to urge the
driver to take evasive action.
■
Pre-collision brake assist
When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed. ■
Pre-collision braking
When the system determines that the
possibility of a frontal collision is high,
the system warns the driver. If the sys-
tem determines that the possibility of a
frontal collision is extremely high, the
brakes are automatically applied to
help avoid the collision or reduce the
collision speed.PCS (Pre-Collision System)
(vehicles with Lexus Safety
System+A) The pre-collision system uses a
front radar sensor and camera sen-
sor to detect vehicles and pedestri-
ans in front of your vehicle and front
side sensors to detect vehicles
approaching from the front left or
right side. When the system deter-
mines that the possibility of a frontal
collision with a vehicle or pedes-
trian is high, a warning operates to
urge the driver to take evasive
action and the potential brake pres-
sure is increased to help the driver
avoid the collision. If the system
determines that the possibility of a
frontal collision with a vehicle or
pedestrian is extremely high, the
brakes are automatically applied to
help avoid the collision or help
reduce the impact of the collision.
The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. ( → P.213)
System functions

212 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ■
Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on ( → P.86) of
the multi-information display. The system is automa tically enabled each
time the power switch is turned to ON
mode
If the system is disabled, the PCS warn-
ing light will turn on and a message will
be displayed on the multi-information
display.
If the pre-collision sy stem is disabled,
the pedestrian alert system will also be
disabled. At this time, the FCTA (Front
Cross Traffic Alert) ( → P.227) system
will also be disabled.
■
Enabling/Disabling the pedestrian
alert system
The pedestrian alert can be
enabled/disabled on ( → P.86) of
the multi-information display. At this
time, the FCTA (Front Cross Traffic
Alert) system will also be enabled/dis-
abled.WARNING●
When your vehicle is towing another
vehicle●
When transporting the vehicle via
truck, boat, train or similar means of
transportation●
When the vehicle is raised on a lift with
the hybrid system on and the tires are
allowed to rotate freely●
When inspecting the vehicle using a
drum tester such as a chassis dyna-
mometer or speedometer tester, or
when using an on vehicle wheel bal-
ancer●
When a strong impact has been
applied to the front bumper, rear
bumper or front grille, due to an acci-
dent or other situation●
If the vehicle cannot be driven in a sta-
ble manner, such as when the vehicle
has been in an accident or is malfunc-
tioning●
When the vehicle is driven in a sporty
manner or off-road●
When the tires are not properly
inflated
●
When the tires are very worn
●
When tires of a size other than speci-
fied are installed
●
When tire chains are installed
●
When a compact spare tire or an
emergency tire puncture repair kit is
used
●
If equipment (snow plow, etc.) that may
obstruct a sensor is temporarily
installed to the vehicle Changing settings of the pre-col-
lision system

216 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) • When there are patterns or paint on the
road, a wall, or billboa rd that may be mis-
taken for a vehicle, pedestrian, or bicy-
clist
• When driving near an object that reflects
radio waves, such as a large truck or
guardrail
• When driving near a TV tower, broad-
casting station, electric power plant, or
other location where strong radio waves
or electrical noise may be present
• When passing an oncoming vehicle on a
narrow road
• When driving close to objects such as
walls or poles on a median
• When passing an oncoming vehicle
around a sharp curve
• When passing a vehicle which is making
a left/right turn
• When being passed by a vehicle
approaching from the le ft or right side in
front of your vehicle
• When making a left/right turn while a
vehicle is approaching from the left or
right side in front of your vehicle • When passing an object on the side of the
road, such as a parked vehicle
• When passing an oncoming vehicle on a
S curve
• When there is an obje ct that may be mis-
taken for a pedestrian, such as a utility
pole, tree, or pole on the roadside or at
the entrance of a curve
• When there is a bicycle or motorcycle on
the roadside at the entrance of a curve
• If the preceding vehicle is a bicycle or
motorcycle ●
The system may operate the pedestrian
alert unnecessarily if it detects the follow-
ing:
• Pedestrians on a sidewalk
• Bicycles and motorcycles
• Patterns or paint on the road, a wall,
median, billboard, etc. that may be mis-
taken for a pedestrian or bicyclist ■
Situations in which the system may not
operate properly ●
In some situations, such as the following,
a vehicle or other object may not be
detected by the sensors, preventing the
system from operating properly:
• If an oncoming vehicle is approaching
your vehicle
• When approaching the side or front of a
vehicle
• If a preceding vehicle has a small rear
end, such as an unloaded truck
• If a preceding vehicle has a low rear end,
such as a low bed trailer

2174-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving • If a vehicle ahead is carrying a load which
protrudes past its rear bumper
• If a vehicle ahead has extremely high
ground clearance
• If a vehicle ahead is irregularly shaped,
such as a tractor or side car
• If the sun or other light is shining directly
on a vehicle or guardrail ahead
• If a vehicle cuts in front of your vehicle or
emerges from beside a vehicle
• If a vehicle ahead makes an abrupt
maneuver (such as sudden swerving,
acceleration or deceleration)
• When suddenly cutting behind a preced-
ing vehicle
• When a vehicle ahead is not directly in
front of your vehicle
• When driving in incl ement weather such
as heavy rain, fog, snow or a sandstorm
• When the vehicle is hit by water, snow,
dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the sur-
rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun or the headlights of oncoming traffic,
shines directly into the camera sensor
• When driving in a location where there
are many objects which reflect radar,
such as a tunnel or parking garage
• When driving at night or in a tunnel with
the headlights off
• When the surrounding area is dim, such
as at dawn or dusk, or while at night or in
a tunnel
• After the hybrid system has started the
vehicle has not been driven for a certain
amount of time
• While making a left/r ight turn and for a
few seconds after making a left/right turn
• While driving on a curve and for a few
seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or low-
ered
• If the wheels are misaligned
• If a wiper blade is blocking the camera
sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely
high speeds.
• When driving on a hill
• If a sensor is misaligned
• If the headlights are misaligned
• When approaching a guardrail at a wide
or narrow angle
• When a vehicle approaches your vehicle
from the front left or right side while your
vehicle is entering an intersection with
poor visibility
• When a vehicle approaches your vehicle
from the rear left or right side
• When a vehicle approaches the side of
your vehicle at a shallow angle
• When driving on a road with a grade that
changes sharply (sha rp incline/decline)
●
In some situations, such as the following,
the sensors may not detect the lane lines
or a safe space the vehicle can be steered

218 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) into, preventing the ac tive steering assist
from operating properly:
• When the white (yellow) lane lines are
difficult to see, such as when they are
faint, diverging/merging, or a shadow is
cast upon them
• When the lane is more wide or narrow
than normal
• When there is a light and dark pattern on
the road surface , such as due to road
repairs
• If the system determines that a collision
can be avoided by only using the brakes
• When a pedestrian is detected near the
centerline of the vehicle●
In some situations such as the following,
sufficient braking force or steering force
may not be obtained, preventing the sys-
tem from performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained
(brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a
gravel road or other slippery surface
• If there are deep ruts in the road
• When driving on a slope
• When driving on a horizontally slanted
road●
Some pedestrians and bicyclists, such as
the following, may not be detected by the
sensors, preventing the system from
operating properly:
• Pedestrians and bicyclists shorter than
approximately 3.2 ft. (1 m) or taller than
approximately 6.5 ft. (2 m)
• Bicyclists riding on unusual bicycles
(bicycles for small children, tricycles,
folding bicycles, BMX bicycles, tandem
bicycles, etc.)
• Pedestrians and bicyclists who are wear-
ing white and look extremely bright
• Pedestrians and bicyclists which are not
illuminated by the headli ghts at night, in a
tunnel, etc.
• Pedestrians whose clothing appears to
be nearly the same co lor or brightness as
their surroundings
• Pedestrians and bicy clists near walls,
fences, guardrails, or large objects • Pedestrians and bicyclists which are on a
metal object (manhole cover, steel plate,
etc.) on the road
• Pedestrians and bicyclists which are mov-
ing fast
• Pedestrians and bicyclists which change
speed or direction abruptly
• Pedestrians and bicyclists which suddenly
emerge from behind a vehicle or large
object
• Pedestrians and bicyclists which are
extremely close to the side of the vehicle
(outside rear view mirror, etc.)
• Pedestrians and bicyclists wearing over-
sized clothing, such as a rain coat, long
skirt, etc., making their silhouette obscure
• Pedestrians and bicyclists who are carry-
ing large baggage, ho lding an umbrella,
etc., hiding part of their body
• Pedestrians and bicyclists behind an
object that hides part of their body
• Pedestrians and bicyclists who are bend-
ing forward or squatting
• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle
• Groups of pedestrians/bicyclists which
are close together ●
Some guardrails, such as the following,
may not be detected by the sensors, pre-
venting the system from operating prop-
erly:
• Guardrails which are less than approxi-
mately 1.9 ft. (60 cm) tall
• Short guardrails
• Irregularly-shaped gu ardrails (wire cable
guardrails, guardrails made of thin poles,
etc.)
• Guardrails which are not illuminated by
the headlights at nigh t, in a tunnel, etc.
• Guardrails which appear to be nearly the
same color or brightness as their sur-
roundings
• Guardrails which appear to be nearly the
same shape as their surroundings (walls,
etc.)
• Guardrails which are over a metal object
(manhole cover, steel plate, etc.)
• Guardrails which are hidden behind thick
grass
• Guardrails which are extremely close to
the side of the vehicle (outside rear view
mirror, etc.)
• Curved guardrails or guardrails at the
entrance of a curve

2194-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving ●
In some situations such as the following,
the system may detect a pedestrian and
display a warning on the head-up display,
even though no pedestrian exists:
• If the front of the vehicle is raised or low-
ered, such as when the road surface is
uneven or undulating (due to ruts, etc.)
• When driving on a slope
• When driving on a horizontally slanted
road
• If the driver’s posture (driver seat posi-
tion) is extreme, such as excessively
reclined
• If the head-up display position is set
extremely high■
If the PCS warning light flashes or illumi-
nates and a warning message is dis-
played on the multi-information display
The pre-collision system may be temporar-
ily unavailable or there may be a malfunc-
tion in the system. ●
In the following situations, the warning
light will turn off, the message will disap-
pear and the system will become opera-
tional when normal operating conditions
return:
• When a sensor or the area around a sen-
sor is hot, such as in the sun
• When a sensor or the area around a sen-
sor is cold, such as in an extremely cold
environment
• When a sensor is dirty or covered with
snow, etc.
• When the part of the windshield in front
of the camera sensor is fogged up or cov-
ered with condensation or ice (Defog-
ging the windshield: → P.324)
• If the camera sensor is obstructed, such
as when the hood is open or a sticker is
attached to the windshield near the cam-
era sensor
●
If the PCS warning ligh t continues to flash
or remains illuminated or the warning
message does not disappear even
though the vehicle has returned to nor-
mal, the system may be malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■
If VSC is disabled
●
If VSC is disabled ( → P.302), the
pre-collision brake assist and pre-colli- sion braking functions are also disabled. ●
The PCS warning light will turn on and
“VSC Turned Off Pre-Collision Brake
System Unavailable” will be displayed on
the multi-information display.

220 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ■
Pre-collision warning
When the system determines that the
possibility of a frontal collision is high, a
buzzer will sound and a warning mes-
sage will be displayed on the
multi-information display to urge the
driver to take evasive action. ■
Pre-collision brake assist
When the system determines that the
possibility of a frontal collision is high,
the system applies greater braking
force in relation to how strongly the
brake pedal is depressed. ■
Pre-collision braking
When the system determines that the
possibility of a frontal collision is high,
the system warns the driver. If the sys-
tem determines that the possibility of a
frontal collision is extremely high, the
brakes are automatically applied to
help avoid the collision or reduce the
collision speed. ■
Pre-collision seatbacks (front pas-
senger’s seat / power rear seat [if
equipped])
If the system determines that the possi-
bility of a frontal collision is high, it may
move the seatbacks of the front pas-
senger’s seat and power rear seats to
the upright position automatically, if
reclined. If a seat is being adjusted, it may not be
moved by the pre-collis ion seat function.
■
Suspension control
When the system determines that the
possibility of a frontal collision is high, PCS (Pre-Collision System)
(vehicles with Lexus Safety
System+) The pre-collision system uses a
radar sensor and camera sensor to
detect vehicles and pedestrians in
front of your vehicle. When the sys-
tem determines that the possibility
of a frontal collision with a vehicle
or pedestrian is high, a warning
operates to urge the driver to take
evasive action and the potential
brake pressure is increased to help
the driver avoid the collision. If the
system determines that the possi-
bility of a frontal collision with a
vehicle or pedestrian is extremely
high, the brakes are automatically
applied to help avoid the collision or
help reduce the impact of the colli-
sion.
The pre-collision system can be dis-
abled/enabled and the warning tim-
ing can be changed. ( → P.222)
System functions