steering wheel LEXUS LS500 2018 Owner's Guide

2114-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
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,
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 op erating 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.System functions

212 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 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.214
• Conditions under which the system
may not operate properly: → P.216
●
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 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
●
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

214 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) system determines that the possibility of a
frontal collision with a vehicle or pedestrian
is high.
Each function is operat ional at the following
speeds: ●
Pre-collision warning:
• Vehicle speed is be tween approximately
7 and 110 mph (10 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 7 and 50 mph
[10 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 7 mph (10 km/h) or more.●
Pre-collision brake assist:
• Vehicle speed is be tween approximately
20 and 110 mph (30 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 20 and 50 mph
[30 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 20 mph (30 km/h) or
more.●
Pre-collision braking:
• Vehicle speed is be tween approximately
7 and 110 mph (10 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 7 and 50 mph
[10 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 7 mph (10 km/h) or more.
The system may not operate in the following
situations: ●
If a battery terminal has been discon-
nected 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)
■
Pedestrian detection function
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.216)
■
Cancelation of the pre-collision braking
If either of the follo wing 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 su ch 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
• 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

2214-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving *
:If equipped
■
Lane departure alert function
When the system determines that the
vehicle might depart from its lane or
course *
, a warning is displayed on the
multi-information display, and either a
warning buzzer will sound or the steer-
ing wheel will vibrate to alert the driver. *
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
When the warning buzzer sounds or
the steering wheel vibrates, check the
area around your vehicle and carefully
operate the steering wheel to move the
vehicle back to the center of the lane.
When the system determines that the
vehicle might depart from its lane and
that the possibility of a collision with an LTA (Lane Tracing 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 LTA system recognizes white or
yellow lane lines using a camera
sensor. Additionally, it detects pre-
ceding and surrounding vehicles
using the camera sensor and front
radar sensor. WARNING■
Before using LTA system
Do not rely solely upon the LTA system.
The LTA 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 LTA system by mis-
take
When not using the LTA system, use the
LTA switch to turn the system off.
Functions included in LTA system

222 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) overtaking vehicle in the adjacent lane
is high, the lane departure alert will
operate even if the turn signals are
operating.
■
Steering assist function
When the system determines that the
vehicle might depart from its lane or
course *
, the system provides assis-
tance as necessary by operating the
steering wheel in small amounts for a
short period of time to keep the vehicle
in its lane. *
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
If the system detects that the steering
wheel has not been operated for a cer-
tain amount of time or the steering
wheel is not being firmly gripped, the
steering assist function may be can-
celed temporarily, a warning message
may be displayed on the multi-informa-
tion display and a warning buzzer may sound. If the steering assist function is
canceled, release the steering wheel
and then grip it again to enable the
function.
When the system determines that the
vehicle might depart from its lane and
that the possibility of a collision with an
overtaking vehicle in the adjacent lane
is high, the steering assist function will
operate even if the turn signals are
operating.
■
Vehicle sway warning function
When the vehicle is swaying within a
lane, the warning buzzer will sound and
a message will be displayed on the
multi-information display to alert the
driver.

2234-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
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 oper-
ating, the lane centering function does
not operate.
In situations where the white (yellow)
lane lines are difficult to see or are not
visible, such as when in a traffic jam,
this function will op erate to help follow
a preceding vehicle by monitoring the
position of the preceding vehicle.
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 displayed on the multi-infor-
mation display and the warning buzzer
sounds. Make sure to grip the steering wheel firmly.
WARNING■
Situations unsuitable for LTA system
Do not use the LTA system in the follow-
ing situations, as doing so may lead to an
accident, resulting in death or serious
injury. ●
When the follow-up cruising display is
displayed ( → P.225) and the preced-
ing vehicle changes lanes. (Your vehi-
cle may follow the preceding vehicle
and also change lanes.)
●
When the follow-up cruising display is
displayed ( → P.225) and the preced-
ing vehicle is swaying. (Your vehicle
may sway accordingly and depart from
the lane.)

2254-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving Press the LTA switch to turn the LTA
system on.
The LTA indicator illuminates and a
message is displayed on the
multi-information display.
Press the LTA switch again to turn the
LTA system off.
When the LTA system is turned on or
off, operation of the LTA system contin-
ues in the same condition the next time
the engine is started. LTA indicator The illumination condition of the indicator
informs the driver of the system operation
status.
Illuminated in white:
LTA system is operating.
Illuminated in green:
Steering wheel assistan ce of the steering
assist function or lane centering function is
operating.
Flashing in orange:
Lane departure alert function is operating.
Operation display of steering
wheel operation support Indicates that steering wheel assistance of
the steering assist function or lane center-
ing function is operating.
Displayed on the outer side of both lane
displays:
Indicates that steering wheel assist of the
lane centering function is operating.
Displayed on the outer side of a lane dis-
play:
Indicates that steering wheel assist of the
steering assist func tion is operating.
Display flashing on the outer side of both
lane displays:
Alerts the driver that their input is neces-
sary to stay in the center of the lane (lane WARNING●
Do not modify the suspension etc. If
the suspension etc. needs to be
replaced, contact your Lexus dealer.●
Do not install or place anything on the
hood or grille. Also, do not install a
grille guard (bull bars, kangaroo bar,
etc.).●
If your windshield needs repairs, con-
tact your Lexus dealer.
Turning LTA system on Indications on multi-information
display
A
B

226 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) centering function).
Lane departure alert function dis-
playDisplayed when the mu lti-information dis-
play is switched to the driving assist system
information screen. 
Inside of displayed white lines is
white
Indicates that the system is recognizing
white (yellow) lines. When the vehicle
departs from its lane , the white line dis-
played on the side the vehicle departs from
flashes orange. 
Inside of displayed white lines is
black
Indicates that the system is not able to rec-
ognize white (yellow) lines or is temporar-
ily canceled.
Follow-up cruising displayIndicates that steering assist of the lane
centering function is operating by monitor-
ing the position of a preceding vehicle.
When the follow-up cruising display is dis- played, if the preceding vehicle changes
lanes, your vehicle may change lanes as
well. Always pay carefu l attention to your
surroundings and operate the steering
wheel as necessary to correct the path of
the vehicle and ensure safety. ■
Warning display
When the lane centerin g function is oper-
ating and the system determines that the
vehicle may depart from its lane due to a
sharp curve, etc., a warning display urging
the driver to operate the steering wheel,
will be displayed.
In some situations a warning display may
not be displayed.
Some displays, which are the same as
those displayed on the multi-informa-
tion display, will be displayed. ■
LTA system curve display on the
head-up displayC
D Indications on head-up display

2274-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving The curve display on the head-up display
changes according to the direction and
curvature of the curve. ■
Operation conditions of each function●
Lane departure alert function
This function operates when all of the fol-
lowing conditions are met.
• LTA is turned on.
• Vehicle speed is approximately 32 mph
(50 km/h) or more.
•System recognizes wh ite (yellow) lane
lines. (When a white [yellow] line is rec-
ognized on only one side, the system will
operate only for the recognized side.)
• Width of traffic lane is approximately 9.8
ft. (3 m) or more.
• Turn signal lever is not operated. (Except
when a vehicle is in the lane on the side
the turn signal was operated)
• Vehicle is not being driven around a
sharp curve.
• No system malfunctions are detected.
( → P.229)●
Steering assist function
This function operates when all of the fol-
lowing conditions are me t in addition to the
operation conditions for the lane depar-
ture alert function.
•Setting for “Steering Assist” in of the
multi-information display is set to “On”.
( → P.76)
• Vehicle is not accelerated or decelerated
by a fixed amount or more.
• Steering wheel is not operated with a
steering force level su itable for changing
lanes.
• ABS, VSC, TRAC and PCS are not oper-
ating.
• TRAC or VSC is not turned off.
• Hands off steering wheel alert is not dis-
played. ( → P.228)
●
Vehicle sway warning function
This function operates when all of the fol-
lowing conditions are met.
• Setting for “Sway Warning” in of the
multi-information display is set to “On”.
( → P.76) • Vehicle speed is ap proximately 32 mph
(50 km/h) or more.
• Width of traffic lane is approximately 9.8
ft. (3 m) or more.
• No system malfunctions are detected.
( → P.229)●
Lane centering function
This function operates when all of the fol-
lowing conditions are met.
• LTA is turned on.
• Setting for “Steering Assist” and “Lane
Center” in of the multi-information
display are set to “On”. ( → P.76)
• This function recognizes white (yellow)
lane lines or the position of a preceding
vehicle (except when the preceding vehi-
cle is small, such as a motorcycle).
• The dynamic radar cruise control with
full-speed range is operating in vehi-
cle-to-vehicle distance control mode.
• Width of traffic lane is approximately 10
to 13 ft. (3 to 4 m).
• Turn signal lever is not operated.
• Vehicle is not being driven around a
sharp curve.
• No system malfunctions are detected.
( → P.229)
• Vehicle does not ac celerate or deceler-
ate by a fixed amount or more.
• Steering wheel is not operated with a
steering force level su itable for changing
lanes.
• ABS, VSC, TRAC and PCS are not oper-
ating.
• TRAC or VSC is not turned off.
• Hands off steering wheel alert is not dis-
played. ( → P.228)
• The driver has one or both hands on the
steering wheel.
• The vehicle is being driven in the center
of a lane.
• Steering assist function is not operating.
■
Temporary cancellation of functions
When operation condit ions are no longer
met, a function may be temporarily can-
celed. However, when the operation condi-
tions are met again, operation of the
function is automatically restored.
( → P.227)
If the operating conditions are no longer
met while the lane ce ntering function is

228 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) operating, a buzzer may sound to indicate
that the function has been temporarily can-
celed. If the alert type customization setting
is set to vibrate the steering wheel, the
buzzer will not sound. (The steering wheel
will vibrate.)
If a message urging operation of the steer-
ing wheel is displayed, operate the steering
wheel. ■
Steering assist function/lane centering
function
Depending on the vehicle speed, lane
departure situation, ro ad conditions, etc.,
the driver may not feel the function is oper-
ating or the function may not operate at all.
The steering control of the function is over-
rided by the driver’s steering wheel opera-
tion.
When the vehicle speed is approximately
31 mph (50 km/h) or less, the warning dis-
play of the lane centering function will not
operate.
Do not attempt to activate the steering
assist function. ■
Lane departure alert function
The warning buzzer may be difficult to hear
due to external noise, audio playback, etc.
Also, it may be difficult to feel steering
wheel vibrations due to the road conditions,
etc.
If the edge of the road is not clear or
straight, the lane departure alert function or
steering assist function may not operate.
In situations such as the following, it may not
be possible for the system to determine if
there is danger of a collision with an over-
taking vehicle in an adjacent lane:
●
When the relative speed between your
vehicle and surrounding vehicles is large
●
When driving around a curve
Do not attempt to activate the lane depar-
ture alert function.
■
Hands off steering wheel alert
When the system determines that the driver
has removed the hands from the steering
wheel while the steering assist function or
lane centering function is operating, a warn-
ing message is displaye d on the multi-infor- mation display. If th e driver continues to
keep the hands off of the steering wheel for
6 seconds, a buzzer sounds, a warning
message is displayed and the function is
temporarily canceled. This alert also oper-
ates in the same way when the driver con-
tinuously operates the steering wheel only a
small amount. If the stee ring assist function
is canceled, release the steering wheel and
then grip it again to enable the function.
In situations such as the following, the sys-
tem may not be able to detect when the
driver’s hands are on the steering wheel: ●
If a steering wheel cover is installed. ●
If the driver is wearing gloves. ●
If something is attached to the steering
wheel. ●
If the driver is gripping the wood trim,
stitched area, spokes, or other part of the
steering wheel that does not have sen-
sors.
In situations such as the following, the hands
off steering wheel alert may not operate
and the steering assist function and lane
centering function may operate even if the
driver’s hands are off the steering wheel: ●
If an object contacts the steering wheel. ●
If a wide object or ar ms are held in front
of the steering wheel. ■
Conditions in whic h functions may not
operate properly
In the following situations, the functions may
not operate properly: ●
There are shadows on the road that run
parallel with, or cover, the white (yellow)
lines.
●
The vehicle is driven in an area without
white (yellow) lines, su ch as in front of a
tollgate or checkpoint, or at an intersec-
tion, etc.
●
The white (yellow) lines are cracked,
“Botts’ dots”, “Raised pavement marker”
or stones are present.
●
The white (yellow) lines cannot be seen
or are difficult to see due to sand, etc.
●
The vehicle is driven on a road surface
that is wet due to rain, puddles, etc.