lexus LC500 2018 Owner's Manual

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4-5. Using the driving support systems
Driving
and the driver is operating the steering
wheel, the LDH system ( P.263) 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 co llision, 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.214
• Conditions under which the system
may not operate properly: P.215
●Do not attempt to test the operation of the pre-collision system yourself, as 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 2seconds. 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 operation 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
●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 operating> and the tires are allowed to rotate freely

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4-5. Using the driving support systems
■Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on ( P.92) of
the multi-information display.
The system is automatically enabled each
time the engine switch is
turned to IGNITION ON mode 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.92) of the
multi-information display.
The operation timing setting is retained
when the engine switch is
turned off.
1 Far
The warning will begin to operate earlier
than with the default timing.
WARNING
●When inspecting the vehicle using a drum tester such as a chassis dyna-mometer or speedo meter 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 camera sensor is temporarily installed to the vehicle
Changing settings of the pre-col-
lision safety system

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4-5. Using the driving support systems
Driving
2Middle
This is the default setting.
3Near
The warning will begin to operate later
than with the default timing.
■Operational conditions
Availability of the pedestrian detection function and pre-collision braking function
depend on the region in which the vehicle was sold.
Read the following for details:
Region A (The pedestrian detection function is available)
The pre-collision system is enabled and the system determines that the possibility of a
frontal collision with a vehicle or pedestrian is high.
Each function is operational at the following speeds:
●Pre-collision warning:• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For
detecting a pedestrian, vehicle speed is between approximately 10 and 80 km/h [7 and 50 mph].)
• The relative speed between your vehicle and the vehicle or pedestrian ahead is approximately 10 km/h (7 mph) or more.
●Pre-collision brake assist:• Vehicle speed is between approximately
30 and 180 km/h (20 and 110 mph). (For detecting a pedestrian, vehicle speed is between approximately 30 and 80 km/h
[20 and 50 mph].) • The relative speed between your vehicle and the vehicle or pedestrian ahead is
approximately 30 km/h (20 mph) or
more.
●Pre-collision braking:
• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For detecting a pedestrian, vehicle speed is
between approximately 10 and 80 km/h [7 and 50 mph].)• The relative speed between your vehicle
and the vehicle or pedestrian ahead is approximately 10 km/h (7 mph) or more.
The system may not operate in the following situations:
●If a 12-volt battery terminal has been dis-connected and reconnected and then the vehicle has not been driven for a certain
amount of time
●If the shift position is in R
●If VSC is disabled (only the pre-collision warning function will be operational)
●If the PCS warning light is flashing or illu-minated
Region B (The pedestrian detection function is not
available)
The pre-collision system is enabled and the
system determines that the possibility of a frontal collision with a vehicle is high.
Each function is operational at the following speeds:
●Pre-collision warning:• Vehicle speed is between approximately
15 and 180 km/h (10 and 110 mph). • The relative speed between your vehicle and the vehicle ahead is approximately
10 km/h (7 mph) or more.
●Pre-collision brake assist:
• Vehicle speed is between approximately 30 and 180 km/h (20 and 110 mph).• The relative speed between your vehicle
and the vehicle ahead is approximately 30 km/h (20 mph) or more.
●Pre-collision braking:• Vehicle speed is between approximately 15 and 180 km/h (10 and 110 mph).
• The relative speed between your vehicle and the vehicle ahead is approximately 10 km/h (7 mph) or more.
RegionsFunction availability
Region AThe pedestrian detection
function is available
Region BThe pedestrian detection
function is not available

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4-5. Using the driving support systems
The system may not operate in the following situations:
●If a 12-volt battery terminal has been dis-connected and reconnected and then the vehicle has not been driven for a certain
amount of time
●If the shift position is in R
●If VSC is disabled (only the pre-collision warning function will be operational)
●If the PCS warning light is flashing or illu-minated
■Pedestrian detection function*2
The pre-collision system detects pedestri-
ans based on the size, profile, and motion of a detected object. However, a pedestrian 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.215)
*2: Depending on the region in which the
vehicle was sold, the pedestrian detec-
tion function may not be available.
■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 vehicle or pedestrian*2
• When changing lanes while overtaking a preceding vehicle• When overtaking a preceding vehicle
that is changing lanes • When overtaking a preceding vehicle that is making a left/right turn
• When passing a vehicle in an oncoming lane that is stopped to make a right/left
turn
• When driving on a road where relative
location to vehicle ahead in an adjacent lane may change, such as on a winding road
• When rapidly closing on a vehicle ahead • If the front of the vehicle is raised or low-
ered, such as when the road surface is uneven or undulating• When approaching objects on the road-
side, such as guardrails, utility poles, trees, or walls
• When there is a vehicle, pedestrian*2, or

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4-5. Using the driving support systems
Driving
object by the roadside at the entrance of a curve
• When driving on a narrow path sur- rounded by a structure, such as in a tun-nel or on an iron bridge
• When there is a metal object (manhole cover, steel plate, etc.), steps, or a protru-sion on the road surface or roadside
• When a crossing pedestrian approaches
very close to the vehicle*2
• When passing through a place with a low structure above the road (low ceiling,
traffic sign, etc.)
• When passing under an object (billboard,
etc.) at the top of an uphill road
• When rapidly closing on 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 the vehicle is hit by water, snow,
dust, etc. from a vehicle ahead • When driving through steam or smoke• When there are patterns or paint on the
road or a wall that may be mistaken for a
vehicle or pedestrian*2
• 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*2: Depending on the region in which the
vehicle was sold, the pedestrian detec-
tion function may not be available.
■Situations in which the system may not operate properly
●In some situations such as the following, a vehicle may not be detected by the radar
sensor and camera sensor, preventing the system from operating properly:• If an oncoming vehicle is approaching
your vehicle • If a vehicle ahead is a motorcycle or bicy-

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4-5. Using the driving support systems
cle • 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
• 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 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 inclement 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 the surrounding area is dim, such
as at dawn or dusk, or while at night or in a tunnel• After the engine has
started the vehicle has not been driven for a certain amount of time• While making a left/right turn and for a
few seconds after maki ng 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 the radar sensor or camera sensor is misaligned
●In some situations such as the following, sufficient braking force may not be obtained, preventing the system 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,

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4-5. Using the driving support systems
Driving
improper tire inflation pressure, etc.) • When the vehicle is being driven on a gravel road or other slippery surface
●Some pedestrians such as the following may not be detected by the radar sensor
and camera sensor, preventing the sys-
tem from operating properly*2:
• Pedestrians shorter than approximately 1 m (3.2 ft.) or taller than approximately 2 m (6.5 ft.)
• Pedestrians wearing oversized clothing (a rain coat, long skirt, etc.), making their silhouette obscure
• Pedestrians who are carrying large bag- gage, holding an umbrella, etc., hiding part of their body
• Pedestrians who are bending forward or squatting• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle • Groups of pedestrians which are close together
• Pedestrians who are wearing white and look extremely bright• Pedestrians in the dark, such as at night
or while in a tunnel • Pedestrians whose clothing appears to be nearly the same color or brightness as
their surroundings • Pedestrians near walls, fences, guardrails, or large objects
• Pedestrians who are on a metal object (manhole cover, steel plate, etc.) on the road
• Pedestrians who are walking fast • Pedestrians who are changing speed abruptly
• Pedestrians running out from behind a vehicle or a large object• Pedestrians who are extremely close to
the side of the vehicle (outside rear view mirror, etc.)*2: Depending on the region in which the
vehicle was sold, the pedestrian detec-
tion function may not be available.
■If the PCS warning light flashes and a
warning message is displayed 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 this case, read the warning message and follow the instruction.
●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 the radar sensor or camera sensor
or the area around either sensor is hot, such as in the sun• When the radar sensor or camera sensor
or the area around either sensor is cold, such as in an extremely cold environment• When the radar sensor or front grille
emblem 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.281)
• 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 light continues to flash
or the warning message does not disap- pear, the system may be malfunctioning. Have the vehicle inspected by any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable repairer immedi-
ately.
■If VSC is disabled
●If VSC is disabled ( P.263), 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.

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4-5. Using the driving support systems
*: If equipped
■Lane departure alert function
When the system determines that the
vehicle might depart from its lane, a
warning is displayed on the multi-infor-
mation display, and either the warning
buzzer sounds to alert the driver.
When the warning buzzer sounds, check
the surrounding road situation and care-
fully operate the steering wheel to move
the vehicle back to the center of the lane.
■Steering assist function
When the system determines that the
vehicle might depart from its lane, the
system provides assistance as neces-
sary by operating the steering wheel in
small amounts for a short period of
time to keep the vehicle in its lane.
For Israel: If the system detects that the
steering wheel has not been operated for a
fixed amount of time or the steering wheel
is not being firmly gripped, a warning is dis-
played on the multi-information display
and the warning buzzer sounds.
Except for Israel: If the system detects that
the steering wheel has not been operated
for a fixed amount of time or the steering
wheel is not being firmly gripped, a warn-
ing is displayed on the multi-information
display and the function is temporarily can-
LKA (Lane-Keeping Assist)*
When driving on highways and
freeways with white or yellow lines,
this function alerts the driver when
the vehicle might depart from its
lane and provides assistance by
operating the steering wheel to
keep the vehicle in its lane. Further-
more, the system also provides
steering assistance when dynamic
radar cruise control with full-speed
range is operating to keep the vehi-
cle in its lane.
The LKA system recognizes visible
white or yellow lines with the cam-
era sensor on the upper portion of
the front windshield.
Functions included in LKA sys-
tem

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4-5. Using the driving support systems
Driving
celed.
■Vehicle sway warning function
When the vehicle is swaying or
appears as if it may depart from its lane
multiple times, the warning buzzer
sounds and a message is displayed on
the multi-information display to alert
the driver.
■Lane centering function
This function is linked with radar cruise
control and provides the required
assistance by operating the steering
wheel to keep the vehicle in its current
lane.
When radar cruise control is not operating,
the lane centering function does not oper-
ate.
For Israel: If the system detects that the
steering wheel has not been operated for a
fixed amount of time or the steering wheel
is not being firmly gripped, a warning is dis-
played on the multi-information display
and the warning buzzer sounds.
Except for Israel: If the system detects that
the steering wheel has not been operated
for a fixed amount of time or the steering
wheel is not being firmly gripped, a warn-
ing is displayed on the multi-information
display and the function is temporarily can-
celed.

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4-5. Using the driving support systems
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. The LKA system does not automatically
drive the vehicle or reduce the amount of attention that must be paid to the area in front of the vehicle. The driver must
always assume full responsibility for driv- ing safely by paying careful attention to the surrounding conditions and operat-
ing the steering wheel to correct the path of the vehicle. Also, the driver must take adequate breaks when fatigued, such as
from driving for a long period of time. Failure to perform appropriate driving operations and pay careful attention may
lead to an accident, resulting in death or serious injury.
■To avoid operating LKA system by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA system
Do not use the LKA system in the follow- ing situations.The system may not operate properly
and lead to an accident, resulting in death or serious injury.
●A spare tire, tire chains, etc. are equipped.
●When the tires have been excessively
worn, or when the tire inflation pres- sure is low.
●Tires which differ by structure, manu-facturer, brand or tread pattern are
used.
●Objects or patterns that could be mis- taken for white (yellow) lines are pres-ent on the side of the road (guardrails,
curbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc. are present due to road repair.
●Vehicle is driven in a temporary lane or
restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather,
fallen snow, freezing, etc.
●Vehicle is driven in traffic lanes other than on highways and freeways.
●Vehicle is driven in a construction zone.
■Preventing LKA system malfunctions
and operations performed by mistake
●Do not modify the headlights or place
stickers, etc. on the surface of the lights.