2021 LEXUS LS500 warning light

2034-5. Using the driving support systems
4
Driving
WARNING
■To avoid malfunction of the front
radar sensor
Observe the following precautions.
Otherwise, the radar sensor may not
operate properly, possibly leading to an
accident resulting in death or serious
injury.
●Keep the radar sens or and the radar
sensor cover clean at all times.
Radar sensor
Radar sensor cover
If the front of the rada r sensor or the front
or back of the radar sensor cover is dirty
or covered with water droplets, snow,
etc., clean it.
Clean the radar sensor and radar sensor
cover with a soft cloth to avoid damaging
them.
●Do not attach accessories, stickers
(including transpar ent stickers) or
other items to the radar sensor, radar
sensor cover or surrounding area.
A
B
●Do not subject the radar sensor or its
surrounding area to a strong impact.
If the radar sensor is moved even
slightly off position, the system may
malfunction and objects may not be
detected correctly.
If the radar sensor, front grille, or front
bumper has been subjected to a
strong impact, have the vehicle
inspected by your Lexus dealer.
●Do not disassemble the radar sensor.
●Do not modify or paint the radar sen-
sor or radar sensor cover.
●In the following cases, the radar sensor
must be recalibrated. Contact your
Lexus dealer for details.
• When the radar sensor or front grille
are removed and installed, or replaced
• When the front bumper is replaced
■To avoid malfunction of the front side
radar sensors
Observe the following precautions.
Otherwise, the radar sensor may not
operate properly, possibly leading to an
accident resulting in death or serious
injury.

2044-5. Using the driving support systems
WARNING
●Keep the radar sensors and their sur-
rounding areas on the front bumper
clean at all times.
If a radar sensor or its surrounding area
on the front bumper is dirty or covered
with snow, the system may not operate
and a warning message (
P.436) will
be displayed.
If this occurs, clean off the dirt or snow
and drive the vehicle for approximately
10 minutes.
If the warning message does not disap-
pear, have your vehicle inspected by your
Lexus dealer.
●Do not attach accessories, stickers
(including transparen t stickers), alumi-
num tape or other items to the radar
sensors or their surrounding area.
●Do not subject a radar sensor or its
surrounding area on the front bumper
to a strong impact.
If a radar sensor is moved even slightly
off position, the system may malfunction
and vehicles may not be detected cor-
rectly.
In the following situations, have your
vehicle inspected by your Lexus dealer.
• If a radar sensor or its surrounding area is subject to a strong impact
• If the area on the front bumper around a radar sensor is scratched or dented,
or the front bumper has become par-
tially disengaged
●Do not disassemble the radar sensors.
●Do not modify the radar sensors or
their surrounding area on the front
bumper.
●In the following cases, the radar sensor
must be recalibrated. Contact your
Lexus dealer for details.
• When the radar sens or is removed and
installed, or replaced
• When the front bumper is replaced
●Do not paint the front bumper any
color other than an official Lexus color.
■To avoid malfunction of the front cam-
era
Observe the following precautions.
Otherwise, the front camera may not
operate properly, possibly leading to an
accident resulting in death or serious
injury.
●Keep the windshield clean at all times.
• If the windshield is dirty or covered with an oily film, water droplets, snow,
etc., clean the windshield.
• As some glass coating agents may affect the detection performance of
the front camera, consult your Lexus
dealer when using a glass coating
agent.
• If a glass coating agent is applied to the windshield, it will still be necessary to
use the windshield wipers to remove
water droplets, etc. from the area of
the windshield in front of the front
camera.
• If the inner side of the windshield where the front camera is installed is
dirty, contact your Lexus dealer.

2054-5. Using the driving support systems
4
Driving
WARNING
●Do not attach objects, such as stickers,
transparent stickers, and so forth, to
the outer side of the windshield in front
of the front camera (shaded area in the
illustration).From the top of the windshield to
approximately 0.4 in. (1 cm) below
the bottom of the front camera
Approximately 14.2 in. (36 cm)
(Approximately 7.1 in. [18 cm] to the
right and left from the center of the
front camera)
●If the part of the windshield in front of
the front camera is fogged up or cov-
ered 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 front camera by
the windshield wipers, replace the
wiper insert or wiper blade.
●Do not attach window tint to the wind-
shield.
●Replace the windshield if it is damaged
or cracked.
After replacing the windshield, the
front camera must be recalibrated.
Contact your Lexus dealer for details.
●Do not allow liquids to contact the
front camera.
●Do not allow bright lights to shine into
the front camera.
A
B
●Do not dirty or damage the front cam-
era.
When cleaning the inside of the wind-
shield, do not allow glass cleaner to
contact the lens of the front camera.
Also, do not touch the lens.
If the lens is dirty or damaged, contact
your Lexus dealer.
●Do not subject the front camera to a
strong impact.
●Do not change the installation position
or direction of the front camera or
remove it.
●Do not disassemble the front camera.
●Do not modify any components of the
vehicle around the front camera
(inside rear view mirror, etc.) or ceiling.
●Do not attach any accessories to the
hood, front grille or front bumper that
may obstruct the front camera. Con-
tact your Lexus dealer for details.
●If a surfboard or other long object is to
be mounted on the roof, make sure
that it will not obstruct the front cam-
era.
●Do not modify the headlights or other
lights.

2114-5. Using the driving support systems
4
Driving
WARNING
●If the part of the windshield in front of
the front camera is fogged up or cov-
ered 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 front camera by
the windshield wipers, replace the
wiper insert or wiper blade.
●Do not attach window tint to the wind-
shield.
●Replace the windshield if it is damaged
or cracked.
After replacing the windshield, the
front camera must be recalibrated.
Contact your Lexus dealer for details.
●Do not allow liquids to contact the
front camera.
●Do not allow bright lights to shine into
the front camera.
●Do not dirty or damage the front cam-
era.
When cleaning the inside of the wind-
shield, do not allow glass cleaner to
contact the lens of the front camera.
Also, do not touch the lens.
If the lens is dirty or damaged, contact
your Lexus dealer.
●Do not subject the front camera to a
strong impact.
●Do not change the installation position
or direction of the front camera or
remove it.
●Do not disassemble the front camera.
●Do not modify any components of the
vehicle around the front camera
(inside rear view mirror, etc.) or ceiling.
●Do not attach any accessories to the
hood, front grille or front bumper that
may obstruct the front camera. Con-
tact 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 front cam-
era.
●Do not modify the headlights or other
lights.

2184-5. Using the driving support systems
■Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on ( P.82) of
the multi-information display.
The system is automa tically enabled each
time the engine switch is turned to IGNI-
TION ON mode.
If the system is disabled, the PCS warn-
WARNING
• In some situations, while the active steering assist is operating, operation
of the function may be canceled if the
accelerator pedal is depressed
strongly or the steering wheel is turned
and the system determines that the
driver is taking evasive action.
• When the active steering assist is operating, if the stee ring wheel is held
firmly or is operated in the opposite
direction to that which the system is
generating torque, the function may be
canceled.
• If the brake pedal is depressed, the sys- tem may determine that the driver is
taking evasive action and the active
steering assist operation may be
delayed.
■Active Asssit for seat belts
If the Active Assist has operated and the
seat belts are locked in a retracted posi-
tion, immediately stop the vehicle in a
safe place, release and retract the seat
belts to unlock them and then fasten
them again.
Also, if a seat belt can be loosened, it can
be unlocked by slightly retracting it with-
out releasing it.
■When to disable the pre-collision sys-
tem
In the following situations, disable the
system, as it may not operate properly,
possibly leading to an accident resulting
in death or serious injury:
●When the vehicle is being towed
●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 engine running 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 reasons
●If the vehicle cannot be driven in a sta-
ble manner, such as when the vehicle
has been in an accid ent 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 punctu re repair kit is
used
●If equipment (snow plow, etc.) that may
obstruct a radar sensor or the front
camera is temporarily installed to the
vehicle
Changing settings of the pre-col-
lision system

2194-5. Using the driving support systems
4
Driving
ing light will turn on and a message will
be displayed on the multi-information
display.
If the pre-collision system is disabled,
the pedestrian alert system will also be
disabled.
■Enabling/Disabling the pedestrian
alert system
The pedestrian alert can be
enabled/disabled on ( P.82) of
the multi-information display.
■Changing the pre-collision warn-
ing timing
The pre-collision warning timing can
be changed on ( P.82) of the
multi-information display.
The warning timing setting is retained
when the engine switch is turned off. How-
ever, if the pre-collision system is disabled
and re-enabled, the operation timing will
return to the default setting (middle).
1 Early
2 Middle
This is the default setting.
3Late
■Changing the pedestrian alert tim-
ing
If the pre-collision warning timing is
changed, the pedestrian alert timing
will also be changed accordingly.
■Operational conditions
The pre-collision system is enabled and the system determines that the possibility of a frontal
collision with a vehicle, pedestri an/bicyclist, guardrail, etc. or a front side collision with a
vehicle is high. Each function is operational at the following speeds:
●Pedestrian alert
●Pre-collision warning
Detectable objectsVehicle speed
PedestriansApprox. 20 to 40 mph (30 to 65 km/h)

2204-5. Using the driving support systems
●Pre-collision brake assist
●Pre-collision braking
●Active steering assist
●Intersection right/left turn assistance (pre-collision warning)
When the turn signal lights are not flashing, support for turning left or right at an intersec-
tion which targets oncoming vehicles does not work.
Detectable objectsVehicle speedRelative speed between your
vehicle and object
Preceding vehiclesApprox. 3 to 110 mph (5 to 180 km/h)Approx. 3 to 110 mph (5 to 180 km/h)
Bicyclists and pedestriansApprox. 3 to 50 mph (5 to 80 km/h)Approx. 3 to 50 mph (5 to 80 km/h)
Detectable objectsVehicle speedApproaching vehicle speed
Vehicles approaching from the front left or right sideApprox. 7 to 37 mph (10 to 60 km/h)Approx. 10 to 37 mph (15 to 60 km/h)
Detectable objectsVehicle speedRelative speed between your vehicle and object
Preceding vehiclesApprox. 20 to 110 mph (30 to 180 km/h)Approx. 20 to 110 mph (30 to 180 km/h)
Bicyclists and pedestriansApprox. 20 to 50 mph (30 to 80 km/h)Approx. 20 to 50 mph (30 to 80 km/h)
Detectable objectsVehicle speedApproaching vehicle speed
Vehicles approaching from the front left or right sideApprox. 19 to 37 mph (30 to 60 km/h)Approx. 10 to 37 mph (15 to 60 km/h)
Detectable objectsVehicle speedRelative speed between your vehicle and object
Preceding vehiclesApprox. 3 to 110 mph (5 to 180 km/h)Approx. 3 to 110 mph (5 to 180 km/h)
Bicyclists and pedestriansApprox. 3 to 50 mph (5 to 80 km/h)Approx. 3 to 50 mph (5 to 80 km/h)
Detectable objectsVehicle speed
PedestriansApprox. 25 to 40 mph (40 to 65 km/h)
GuardrailApprox. 37 to 50 mph (60 to 80 km/h)

2214-5. Using the driving support systems
4
Driving
●Intersection right/left turn assistance (pre-collision braking)
When the turn signal lights are not flashing, support for turning left or right at an intersec-
tion which targets oncoming vehicles does not work.
The system may not operate in the following situations:
●If a battery terminal has been disconnected and reconnected and then the vehicle has not
been driven for a certain amount of time
●If the shift position is in R
●When the VSC OFF indicator is illuminated (only the pedest rian alert and pre-collision
warning function will be operational)
●When there is insufficient safe or unobstructed space for the vehicle to be steered into
●When an object is approaching the area the vehicle is to be steered into
■Vehicle, pedestrian or bicyclist detec-
tion function
The pre-collision system detects vehicles,
pedestrians and bicyclists based on the size,
profile, and motion of the person. However,
a vehicle, pedestrian or bicyclist may not be
detected depending on the surrounding
brightness and the motion, posture, and
angle of the person, preventing the system
from operating properly. ( P.224)
The illustration shows an image of vehicles,
pedestrians and bicyclists.
■Cancelation of pre-collision braking
and active steering assist
If either of the following occur while the
pre-collision braking function is operating, it
will be canceled:
●The accelerator pedal is depressed
strongly.
Detectable objectsVehicle speedOncoming vehicle speedRelative speed
between your vehicle and object
Oncoming vehiclesApprox. 7 to 15 mph (10 to 25 km/h)Approx. 20 to 35
mph (30 to 55 km/h)Approx. 25 to 50
mph (40 to 80 km/h)
PedestriansApprox. 7 to 15 mph (10 to 25 km/h)—Approx. 7 to 15 mph (10 to 25 km/h)
Detectable objectsVehicle speedOncoming vehicle speedRelative speed
between your vehicle and object
Oncoming vehiclesApprox. 10 to 15 mph (15 to 25 km/h)Approx. 20 to 28
mph (30 to 45 km/h)Approx. 28 to 43
mph (45 to 70 km/h)
PedestriansApprox. 7 to 15 mph (10 to 25 km/h)—Approx. 7 to 15 mph (10 to 25 km/h)