LEXUS LS500 2019 Owners Manual

2114-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving • When driving on a road surrounded by a
structure, such as in a tunnel or on an iron
bridge
• When there is a metal object (manhole
cover, steel plate, etc.), steps, dips, or a
protrusion on the ro ad surface or road-
side
• When a crossing pedestrian or bicyclist
approaches very close to the vehicle
• When passing through a place with a low
structure above the road such as a low
ceiling, underpass, br idge girder, traffic
sign, etc.
• When passing under an object (road
sign, billboard, etc.)
• When approaching an electric toll gate
barrier, parking area barrier, or other
barrier that opens and closes
• When using an automatic car wash
• When driving through or under objects
that may contact the vehicle, such as thick
grass, tree branches, or a banner • When driving through steam or smoke
• 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, electr ic 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 approachin g from the left or
right side in front of your vehicle

212 4-5. Using the driving support systems
LS500_OM_(U)_1810 • 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 object 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, pedestrian or bicyclist may not
be detected by the sensors, preventing
the system from operating properly:
• When a vehicle, pedestrian or bicyclist is
approaching your vehicle
• When your vehicle or a vehicle, pedes-
trian or bicyclist is wobbling
• If a vehicle, pedestrian or bicyclist makes
an abrupt maneuver (such as sudden
swerving, acceleration or deceleration)
• When your vehicle approaches a vehicle,
pedestrian or bicyclist rapidly
• When a vehicle, pedestrian or bicyclist is not directly in front of your vehicle
• When a vehicle, pedestrian or bicyclist is
near a wall, fence, guardrail, manhole
cover, vehicle, steel plate on the road, etc.
• When a vehicle, pedestrian or bicyclist is
under a structure
• When part of a vehicle, pedestrian or
bicyclist is hidden by an object, such as
large baggage, an umbrella, or guardrail
• When multiple vehicl es, pedestrians or
bicyclists are close together
• If the sun or other light is shining directly
on a vehicle, pedestrian, bicyclist or
guardrail ahead
• When a vehicle, pedestrian or bicyclist is
a shade of white and looks extremely
bright
• When a vehicle, pedestrian or bicyclist
appears to be nearly the same color or
brightness as its surroundings
• If a vehicles, pedestrians or bicyclists cuts
or suddenly emerges in front of your
vehicle
• When the front of your vehicle is hit by
water, snow, dust, etc.
• When a very bright light ahead, such as
the sun or the head lights of oncoming
traffic, shines direct ly into the front cam-
era
• When approaching the side or front of a
vehicle ahead
• If a vehicle ahead is a motorcycle
• If a vehicle ahead is narrow, such as a per-
sonal mobility 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

2134-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving • If a vehicle ahead has extremely high
ground clearance
• If a vehicle ahead is carrying a load which
protrudes past its rear bumper
• If a vehicle ahead is irregularly shaped,
such as a tractor or side car
• If a vehicle ahead is a child sized bicycle,
a bicycle that is carrying a large load, a
bicycle ridden by more than one person,
or a uniquely shaped bicycle (bicycle with
a child seat, tandem bicycle, etc.)
• If a pedestrian/or the riding height of a
bicyclist ahead is shorter than approxi-
mately 3.2 ft. (1 m) or taller than approxi-
mately 6.5 ft. (2 m)
• If a pedestrian/bicyclist is wearing over-
sized clothing (a rain coat, long skirt,
etc.), making their silhouette obscure
• If a pedestrian is bending forward or
squatting or bicyclist is bending forward
• If a pedestrian/bicyclist is moving fast
• If a pedestrian is pushing a stroller, wheel-
chair, bicycle or other vehicle
• When driving in incl ement weather such
as heavy rain, fog, snow or a sandstorm
• When driving through steam or smoke
• When the surrounding area is dim, such
as at dawn or dusk, or while at night or in
a tunnel, making a vehicle, pedestrian or
bicyclist appear to be nearly the same
color as its surroundings
• When driving in a place where the sur-
rounding brightness changes suddenly,
such as at the entrance or exit of a tunnel
• When driving in a lo cation where there are many objects which reflect radar,
such as a tunnel or parking garage
• After the engine 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 front cam-
era
• The vehicle is being driven at extremely
high speeds.
• When driving on a hill
• If the radar sensor or front camera is mis-
aligned
• 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)
• Pedestrians and bicyclists which are not
illuminated by the head lights at night, in a
tunnel, etc.
• 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.)

214 4-5. Using the driving support systems
LS500_OM_(U)_1810 ●
In some situations, such as the following,
the sensors may not detect the lane lines
or a safe space the vehicle can be steered
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 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 guardrails (wire cable
guardrails, guardrails made of thin poles,
etc.)
• Guardrails which are not illuminated by
the headlights at night, in a tunnel, etc.
• Guardrails which appear to be nearly the
same color or brig htness 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 ●
In some situations su ch 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 VSC is disabled ●
If VSC is disabled (  P.294), the pre-col-
lision brake assist and pre-collision brak-
ing 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.

2154-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving
The system can detect the following:
 Vehicles
 Bicyclists
 Pedestrians
■
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
If the system determines that the possi-
bility of a frontal collision is extremely
high, the brakes are automatically
applied to help avoid the collision or
reduce the impact of the collision. ■
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 + 2.0) The pre-collision system uses a
radar sensor and front camera to
detect objects (  P.215) in front of
the vehicle. When the system
determines that the possibility of a
frontal collision with an object 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 deter-
mines that the possibility of a frontal
collision with an object 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.217)
Detectable objects
System functions

216 4-5. Using the driving support systems
LS500_OM_(U)_1810 the Adaptive Variable Suspension Sys-
tem (  P.295) will control the damp-
ing force of the shock absorbers to
help maintain an appropriate vehicle
posture. ■
Steering control
When the system determines that the
possibility of a frontal collision is high
and the driver is operating the steering
wheel, the LDH system (  P.295) will
control the turning angle of the front
and rear wheels and effort necessary
to turn the steering wheel to help
enhance steering responsiveness. WARNING■
Limitations of the pre-collision system●
The driver is solely responsible for safe
driving. Always drive safely, taking
care to observe your surroundings.
Do not use the pre-collision system
instead of normal braking operations
under any circumstances. This system
will not prevent collisions or lessen col-
lision damage or injury in every situa-
tion. Do not overly rely on this system.
Failure to do so may lead to an acci-
dent, resulting in death or serious
injury.
●
Although this system is designed to
help avoid a collision or help reduce
the impact of the coll ision, its effective-
ness may change according to various
conditions, therefore the system may
not always be able to achieve the same
level of performance.
Read the following conditions care-
fully. Do not overly rely on this system
and always drive carefully.
• Conditions under which the system
may operate even if there is no possi-
bility of a collision:  P.219
• Conditions under which the system
may not operate properly:  P.220 ●
Do not attempt to test the operation of
the pre-collision system yourself.
Depending on the objects used for
testing (dummies, cardboard objects
imitating detectable objects, etc.), the
system may not operate properly, pos-
sibly leading to an accident. ■
Pre-collision braking ●
When the pre-collision braking func-
tion is operating, a large amount of
braking force will be applied. ●
If the vehicle is stopped by the opera-
tion of the pre-collision braking func-
tion, the pre-collision braking function
operation will be canceled after
approximately 2 seco nds. Depress the
brake pedal as necessary. ●
The pre-collision braking function may
not operate if certain operations are
performed by the driver. If the acceler-
ator pedal is being depressed strongly
or the steering wheel is being turned,
the system may determine that the
driver is taking evasive action and pos-
sibly prevent the pre-collision braking
function from operating. ●
In some situations, while the pre-colli-
sion braking function is operating,
operation of the function may be can-
celed if the accelerator pedal is
depressed strongly or the steering
wheel is turned and the system deter-
mines that the driver is taking evasive
action.
●
If the brake pedal is being depressed,
the system may determine that the
driver is taking evasive action and pos-
sibly delay the operat ion timing of the
pre-collision braking function.
■
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

2174-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving ■
Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on (  P.80) 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-
ing light will turn on and a message will
be displayed on the multi-information
display.
■
Changing the pre-collision warn-
ing timing
The pre-collision warning timing can
be changed on (  P.80) of the
multi-information display. The warning timing setting is retained
when the engine switch is turned off. How-
ever, if the pre-collisio n system is disabled
and re-enabled, the operation timing will
return to the default setting (middle).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 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 is applied to the
front bumper or front grille, due to an
accident or other reasons●
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 the radar sensor or front cam-
era is temporarily installed to the vehi-
cle Changing settings of the pre-col-
lision system

218 4-5. Using the driving support systems
LS500_OM_(U)_1810 1 Early
2 Middle This is the default setting.
3 Late
■
Operational conditions
The pre-collision system is enabled and the system determines that the possibility of a frontal
collision with a detect ed object is high.
Each function is operational at the following speed ●
Pre-collision warning
●
Pre-collision brake assist Detectable objects Vehicle speed Relative speed between your
vehicle and object
Vehicles Approx. 7 to 110 mph (10 to
180 km/h) Approx. 7 to 110 mph (10 to
180 km/h)
Bicyclists and pedestrians Approx. 7 to 50 mph (10 to
80 km/h) Approx. 7 to 50 mph (10 to
80 km/h)
Detectable objects Vehicle speed Relative speed between your
vehicle and object
Vehicles Approx. 20 to 110 mph (30
to 180 km/h) Approx. 20 to 110 mph (30
to 180 km/h)
Bicyclists and pedestrians Approx. 20 to 50 mph (30
to 80 km/h) Approx. 20 to 50 mph (30
to 80 km/h)

2194-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving ●
Pre-collision braking
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 pre-collision warning function will
be operational)■
Object detection function
The system detects ob jects based on their
size, profile, motion, etc. However, an object
may not be detected depending on the sur-
rounding brightness and the motion, pos-
ture, and angle of the detected object,
preventing the system from operating prop-
erly. (  P.220)
The illustration shows an image of detect-
able objects.
■
Cancelation of the pre-collision braking
If either of the following occur while the
pre-collision braking function is operating, it
will be canceled:
●
The accelerator pedal is depressed
strongly.
●
The steering wheel is turned sharply or
abruptly.
■
Conditions under which the system may
operate even if there is no possibility of a
collision
●
In some situations such as the following,
the system may determine that there is a possibility of a frontal collision and oper-
ate.
• When passing a detectable object, etc.
• When changing lanes while overtaking a
detectable object, etc.
• When approaching a detectable object
in an adjacent lane or on the roadside,
such as when changing the course of
travel or driving on a winding road
• When rapidly closing on a detectable
object, etc.
• When approaching objects on the road-
side, such as detectable objects, guard-
rails, utility poles, trees, or walls
• When there is detectable object or other
object by the roadside at the entrance of
a curveDetectable objects Vehicle speed Relative speed between your
vehicle and object
Vehicles Approx. 7 to 110 mph (10 to
180 km/h) Approx. 7 to 110 mph (10 to
180 km/h)
Bicyclists and pedestrians Approx. 7 to 50 mph (10 to
80 km/h) Approx. 7 to 50 mph (10 to
80 km/h)

220 4-5. Using the driving support systems
LS500_OM_(U)_1810 • When there are patterns or paint in front
of your vehicle that may be mistaken for a
detectable object
• When the front of your vehicle is hit by
water, snow, dust, etc.
• When overtaking a detectable object
that is changing lanes or making a
right/left turn
• When passing a detect able object in an
oncoming lane that is stopped to make a
right/left turn
• When a detectable object approaches
very close and then stops before entering
the path of your vehicle
• If the front of your vehicle is raised or low-
ered, such as when on an uneven or
undulating road surface
• When driving on a road surrounded by a
structure, such as in a tunnel or on an iron
bridge
• When there is a metal object (manhole
cover, steel plate, etc.), steps, or a protru-
sion in front of your vehicle
• When passing under an object (road
sign, billboard, etc.) • When approaching an electric toll gate
barrier, parking area barrier, or other
barrier that opens and closes
• When using an automatic car wash
• When driving through or under objects
that may contact your vehicle, such as
thick grass, tree br anches, or a banner
• When driving through steam or smoke
• 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, electr ic power plant, or
other location where strong radio waves
or electrical noise may be present ■
Situations in which the system may not
operate properly ●
In some situations su ch as the following,
an object may not be detected by the
radar sensor and front camera, prevent-
ing the system from operating properly:
• When a detectable object is approaching
your vehicle
• When your vehicle or a detectable object
is wobbling
• If a detectable object makes an abrupt
maneuver (such as sudden swerving,
acceleration or deceleration)
• When your vehicle approaches a detect-
able object rapidly
• When a detectable object is not directly
in front of your vehicle