light LEXUS LS500 2018 Owners Manual

2294-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ●
The traffic lines are yellow (which may be
more difficult to recognize than lines that
are white).●
The white (yellow) lines cross over a curb,
etc.●
The vehicle is driven on a bright surface,
such as concrete.●
If the edge of the road is not clear or
straight.●
The vehicle is driven on a surface that is
bright due to reflected light, etc.●
The vehicle is driven in an area where the
brightness changes suddenly, such as at
the entrances and exits of tunnels, etc.●
Light from the headlights of an oncoming
vehicle, the sun, etc. enters the camera.●
The vehicle is driven on a slope.●
The vehicle is driven on a road which tilts
left or right, or a winding road.●
The vehicle is driven on an unpaved or
rough road.●
The vehicle is driven around a sharp
curve.●
The traffic lane is ex cessively narrow or
wide.●
The vehicle is extremely tilted due to car-
rying heavy luggage or having improper
tire pressure.●
The distance to the preceding vehicle is
extremely short.●
The preceding vehicle changes lanes.
(Your vehicle may follow the preceding
vehicle and also change lanes.)●
The preceding vehicle is swaying. (Your
vehicle may sway accordingly and depart
from the lane.)
●
The vehicle is moving up and down a
large amount due to road conditions
during driving (poor roads or road
seams).
●
When driving in a tunnel or at night with
the headlights off or when a headlight is
dim due to its lens being dirty or it being
misaligned.
●
The vehicle is struck by a crosswind.
●
The vehicle has just changed lanes through operation of the steering wheel
by the driver or crossed an intersection. ●
Snow tires, etc. are equipped. ●
The vehicle is being driven at extremely
high speeds. ■
Warning message
If the following warning message is dis-
played on the multi-in formation display and
the LTA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce-
dure.
Warning message Details/Actions
“LTA Malfunction
Visit Your Dealer” The system may not be
operating properly.
→ Have the vehicle
inspected at your
Lexus dealer.
“Front Camera
Unavailable
Remove Debris
On Windshield” Dirt, rain, condensa-
tion, ice, snow, etc., are
present on the wind-
shield in front of the
camera sensor.
→ Turn the LTA system
off, remove any dirt,
rain, condensation, ice,
snow, etc., from the
windshield, and then
turn the LTA system
back on.

2334-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving
Press the LKA switch to turn the LKA
system on.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 unsuitab le 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 th e 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. ●
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 LKA system on

236 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) function is automatically restored.
( → P.235)■
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.■
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. ■
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 the driver continues to
keep the hands off of the steering wheel, a
warning message is displayed and the func-
tion is temporarily canceled. This alert also
operates in the same way when the driver
continuously operates the steering wheel
only a small amount. However, depending
on the road conditions , etc., the function
may not cancel. ■
White (yellow) lines ar e only on one side
of road
The LKA system will not operate for the
side on which white (yellow) lines could not
be recognized. ■
Conditions in whic h functions may not
operate properly
In the following situations, the camera sen-
sor may not detect white (yellow) lines and
various functions may not operate normally.
●
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, such 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. ●
The traffic lines are yellow (which may be
more difficult to reco gnize than lines that
are white). ●
The white (yellow) lines cross over a curb,
etc. ●
The vehicle is driven on a bright surface,
such as concrete. ●
The vehicle is driven on a surface that is
bright due to reflected light, etc. ●
The vehicle is driven in an area where the
brightness changes sudd enly, such as at
the entrances and exits of tunnels, etc. ●
Light from the headlights of an oncoming
vehicle, the sun, etc. enters the camera. ●
The vehicle is driven where the road
diverges, merges, etc. ●
The vehicle is driven on a slope. ●
The vehicle is driven on a road which tilts
left or right, or a winding road. ●
The vehicle is driven on an unpaved or
rough road. ●
The vehicle is driven around a sharp
curve. ●
The traffic lane is excessively narrow or
wide. ●
The vehicle is extremely tilted due to car-
rying heavy luggage or having improper
tire pressure. ●
The distance to the preceding vehicle is
extremely short.
●
The vehicle is moving up and down a
large amount due to road conditions
during driving (poor roads or road
seams).
●
The headlight lenses are dirty and emit a
faint amount of light at night, or the beam
axis has deviated.
●
The vehicle is struck by a crosswind.
●
The vehicle has just changed lanes or
crossed an intersection.
●
Snow tires, etc. are equipped.

240 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) *
: Displayed when speed limit information for th e road is available from the navigation sys-
tem
In the following situations, the RSA sys-
tem will alert the driver.
 When the vehicle speed exceeds
the speed warning threshold of the
speed limit sign displayed, the sign
display will be emphasized and a
buzzer will sound.
 When the RSA system recognizes a
do not enter sign and determines
that your vehicle has entered a
no-entry area, the displayed sign will
flash and a buzzer will sound.
Depending on the situation, traffic
environment (traffic direction, speed,
unit) may be detected incorrectly and a
warning display may not operate prop-
erly. ■
Turning the system on/off
1 Select on of the
multi-information display ( → P.76)
2 Press on the steering wheel.
■
Automatic turn-off of RSA sign display
In the following situations, a displayed
speed limit sign will stop being displayed
automatically:
●
A new sign is not recognized for a certain
distance. (When speed limit information
is not available from the navigation sys-
tem)
In the following situations, do not enter, stop
and yield signs will st op being displayed
automatically:
●
The system determines that your vehicle
has passed the sign.
●
The road changes due to a left or right turn, etc. ■
Conditions in which the function may
not operate or detect correctly
In the following situations, RSA does not
operate normally and may not recognize
signs, display the incorrect sign, etc. How-
ever, this does not indicate a malfunction. ●
The camera sensor is misaligned due to a
strong impact being applied to the sen-
sor, etc. ●
Dirt, snow, stickers, etc. are on the wind-
shield near the camera sensor. ●
In inclement weather such as heavy rain,
fog, snow or sand storms ●
Light from an oncoming vehicle, the sun,
etc. enters the camera sensor. ●
The sign is dirty, faded, tilted or bent. ●
All or part of the sign is hidden by the
leaves of a tree, a pole, etc. ●
The sign is only visible to the camera sen-
sor for a short amount of time. ●
The driving scene (turning, lane change,
etc.) is judged incorrectly. ●
Even if it is a sign not appropriate for the
currently traveled lane, such a sign exists
directly after a freeway branches, or in an
adjacent lane just before merging. ●
Stickers are attached to the rear of the
preceding vehicle. ●
A sign resembling a system compatible
sign is recognized. ●
The front of the vehicle is raised or low-
ered due to the carried load.
●
The surrounding brightness is not suffi-
cient or changes suddenly.
●
When a sign intended for trucks, etc. is
recognized.
●
The navigation system map data is old.
●
The navigation system is not operating.
●
Side road speed signs may be detected
and displayed (if positioned in sight of the
camera sensor) while the vehicle is trav-
eling on the main road.Warning indication

244 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) This mode employs a radar sensor to detect the presence of vehicles up to approx-
imately 328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following
distance, and operates to maintain a suit able following distance from the vehicle
ahead. Note that vehicle-to-vehicle di stance will close in when trav eling on long downhill slopes.
Example of constant speed cruising
When there are no vehicles aheadThe vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle distance
can also be set by operating the ve hicle-to-vehicle distance switch.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appearsWhen a vehicle is detected running ahead of you, the system automatically decelerates
your vehicle. When a greater reduction in vehicle speed is necessary, the system applies
the brakes (the stop lights will come on at this time). The sy stem will respond to changes in
the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by
the driver. Approach warning warns you when th e system cannot decelera te sufficiently to
prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your vehi cle will also stop (vehicle is stopped by sys-
tem control). After the vehicle ahead starts off, pressing the “+RES” switch or depressing
the accelerator pedal will resume follow-up cruising.
Vehicles with Lexus Safety System+A: If your vehicle is being driven at approximately 43
mph (70 km/h) or more, when the turn signal is operated and a lane change is made to
pass the vehicle ahead, the system will start acce lerating your vehicle up to the set speed to
assist smooth overtaking.
Example of acceleration
When there are no longer any preceding vehicles driving slower than the set Driving in vehicle-to-vehicle distance control mode
A
B
C

2514-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving *
:If equipped
Meter control switchesTurning the Blind Spot Monitor on/off. Outside rear view mirror indicators When a vehicle is dete cted in a blind spot
of the outside rear view mirrors or
approaching rapidly from behind into a
blind spot, the outside rear view mirror
indicator on the detected side will illumi-
nate. If the turn signal lever is operated
toward the detected side, the outside rear
view mirror indicator flashes.
BSM indicator Illuminates when the Blind Spot Monitor is
enabled ■
Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir-
ror indicator may be difficult to see. ■
When “BSM Not Available” is shown on
the multi-information display
Ice, snow, mud, etc., may be attached to the
rear bumper around the sensors. ( → P.252)
The system should return to normal opera-
tion after removing the ice, snow, mud, etc.
from the rear bumper. Additionally, the sen-
sors may not operate normally when driving
in extremely hot or cold environments. ■
Customization
Some functions can be customized.
( → P.468)BSM (Blind Spot Monitor) *
The Blind Spot Monitor is a system
that uses rear side radar sensors
installed on the inner side of the
rear bumper on the left and right
side to assist the driver in confirm-
ing safety when changing lanes. WARNING■
Cautions regarding the use of the sys-
tem
The driver is solely responsible for safe
driving. Always driv e safely, taking care
to observe your surroundings.
The Blind Spot Monitor is a supplemen-
tary function which alerts the driver that a
vehicle is in a blind spot of the outside
rear view mirrors or is approaching rap-
idly from behind into a blind spot. Do not
overly rely on the Blind Spot Monitor. As
the function cannot judge if it is safe to
change lanes, over reliance could lead to
an accident resulting in death or serious
injury.
As the system may not function correctly
under certain conditions, the driver’s own
visual confirmation of safety is necessary.
System components
A B
C

2534-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving
Use the meter control switches to turn
on/off the function.
1 Press or to select .
2 Press or to select and
then press .WARNING●
Keep the sensors and the surrounding
areas on the rear bumper clean at all
times.
If a sensor or its su rrounding area on the
rear bumper is dirty or covered with
snow, the Blind Spot Monitor may not
operate and a warning message
( → P.251) will be displayed. In this situa-
tion, clear off the dirt or snow and drive
the vehicle with the operation conditions
of the BSM function ( → P.255) satisfied
for approximately 10 minutes. If the
warning message does not disappear,
have the vehicle inspected by your Lexus
dealer.
●
Do not attach accessories, stickers
(including transparen t stickers), alumi-
num tape, etc. to a sensor or its sur-
rounding area on the rear bumper.
●
Do not subject a sensor or its sur-
rounding area on the rear bumper to a
strong impact.
If a sensor is moved even slightly off posi-
tion, the system may malfunction and
vehicles may not be detected correctly.
In the following situations, have your
vehicle inspected by your Lexus dealer.
• A sensor or its surrounding area is
subject to a strong impact. • If the surrounding area of a sensor is
scratched or dented, or part of them
has become disconnected. ●
Do not disassemble the sensor. ●
Do not modify the sensor or surround-
ing area on the rear bumper. ●
If a sensor or the rear bumper needs to
be removed/installed or replaced,
contact your Lexus dealer. ●
Do not paint the rear bumper any
color other than an official Lexus color.
Turning the Blind Spot Monitor
on/off

2654-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir- ror indicator may be difficult to see. ■
Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear
over loud noises, such as if the audio system
volume is high. ■
When “RCTA NOT AVAILABLE” is
shown on the multi-information display
Water, snow, mud, etc., may be attached to
the rear bumper around the sensors.
( → P.253) Removing the water, snow, mud,
etc., from the attached to the rear bumper
around the sensors to normal.
Additionally, the function may not function
normally when used in extremely hot or
cold environments. ■
Rear side radar sensors
→ P.253
■
Operation of the RCTA function
The RCTA function uses rear side radar sensors to detect vehicles approaching
from the right or left at the rear of the ve hicle and alerts the driver of the presence
of such vehicles by flashing the outside rear view mirror indi cators and sounding a
buzzer.
Approaching vehicles
Detection areas of approaching vehicles ■
RCTA icon display
When a vehicle approaching from the
right or left at the rear of the vehicle is detected, the following will be dis-
played on the Center Display.
 Example (Lexus parking assist mon-WARNING■
Cautions regarding the use of the
function
The driver is solely responsible for safe
driving. Always driv e safely, taking care
to observe your surroundings.
The RCTA function is only a supplemen-
tary function which alerts the driver that a
vehicle is approaching from the right or
left at the rear of the vehicle. As the
RCTA function may not function cor-
rectly under certain conditions, the
driver’s own visual confirmation of safety
is necessary. Over reli ance on this func-
tion may lead to an accident resulting
death or serious injury.
RCTA function
A
B

270 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) • Pedestrians who are bending forward or
squatting
• Pedestrians who are lying down
• Pedestrians who are running
• Pedestrians who suddenly enter the
detection area
• Pedestrians riding a bicycle, skateboard,
or other light vehicle
• Pedestrians wearing oversized clothing
such as a rain coat, long skirt, etc., making
their silhouette obscure
• Pedestrians whose body is partially hid-
den by an object, such as a cart or
umbrella
• Pedestrians which are obscured by dark-
ness, such as at night●
In some situations, such as the following,
pedestrians may not be detected by the
rear camera detection function, prevent-
ing the function from operating properly:
• When backing up in inclement weather
(rain, snow, fog, etc.)
• When the rear camera is obscured (dirt,
snow, ice, etc. are attached) or scratched
• When a very bright light, such as the sun,
or the headlights of another vehicle,
shines directly into the rear camera
• When backing up in a place where the
surrounding brightness changes sud-
denly, such as at the entrance or exit of a
garage or underground parking lot
• When backing up in a dim environment
such as during dusk or in an underground
parking lot●
Even though there are no pedestrians in
the detection area, some objects, such as
the following, may be detected, possibly
causing the rear camera detection func-
tion to operate.
• Three dimensional objects, such as a
pole, traffic cone, fence, or parked vehi-
cle
• Moving objects, such as a car or motor-
cycle
• Objects moving toward your vehicle
when backing up, such as flags or pud-
dles (or airborne matter, such as smoke,
steam, rain, or snow)
• Cobblestone or gravel roads, tram rails,
road repairs, white lines, pedestrian
crossings or fallen leaves on the road
• Metal covers (gratings), such as those
used for drainage ditches • Objects reflected in a puddle or on a wet
road surface
• The roadside or bumps on the road
•Shadows on the road ●
In some situations, such as the following,
the rear camera detection function may
operate even though there are no pedes-
trians in the detection area.
• When backing up toward the roadside or
a bump on the road
• If the vehicle is signif icantly tilted, such as
when carrying a heavy load
• When backing up toward an
incline/decline
• If the suspension has been modified or
tires of a size othe r than specified are
installed
• If the rear of the vehicle is raised or low-
ered due to the carried load
• If an electronic component, such as a
backlit license plate or rear fog light, is
installed near the rear camera
• If a bumper protector, such as an addi-
tional trim strip, is installed to the rear
bumper
• If the orientation of the rear camera has
been changed due to a collision or other
impact, or removal and installation
• If a towing eyelet is in stalled to the rear of
the vehicle
• When water is flowing over the rear cam-
era lens
• When the rear camera is obscured (dirt,
snow, ice, etc. are at tached) or scratched
• If there is a flashing light in the detection
area, such as the emergency flashers of
another vehicle ●
Situations in which the rear camera
detection function may be difficult to
notice
• If buzzer may be difficult to hear if the
surrounding area is noisy, the volume of
the audio system volume is high, the air
conditioning system is being used, etc.
• If the temperature in the cabin is
extremely high or low, the audio system
screen may not operate correctly.

2814-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ●
Weather
• If a sensor is covered with ice, snow, dirt,
etc. (when cleared, the system will return
to normal)
• If heavy rain or water strikes a sensor
• When driving in incl ement weather such
as fog, snow or a sandstorm●
Other ultrasonic wave sources
• When vehicle horns, vehicle detectors,
motorcycle engines, air brakes of large
vehicles, the clearance sonar of other
vehicles or other devices which produce
ultrasonic waves are near the vehicle
• If a sticker or an el ectronic component,
such as a backlit license plate (especially
fluorescent type), fog lights, fender pole
or wireless antenna is installed near a
sensor●
Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or low-
ered due to the carried load
• If the orientation of a sensor has been
changed due to a collision or other
impact■
Situations in which the Parking Support
Brake function (stati c objects) may not
operate properly
In some situations, such as the following, this
function may not operate properly. ●
Weather
• When a sensor or the area around a sen-
sor is extremely hot or cold
• When strong winds are blowing • If a sensor is covered with ice, snow, dirt,
etc. (when cleared, the system will return
to normal)
• If heavy rain or water strikes a sensor
• When driving in incl ement weather such
as fog, snow or a sandstorm ●
Vehicle surroundings
• When an object that cannot be detected
is between the vehicle and a detected
object
• If an object such as a vehicle, motorcycle,
bicycle or pedestrian cuts in front of the
vehicle or runs out from the side of the
vehicle ●
Other ultrasonic waves sources
• When vehicle horns, vehicle detectors,
motorcycle engines, air brakes of large
vehicles, the clearance sonar of other
vehicles or other de vices which produce
ultrasonic waves are near the vehicle
• If a sticker or an electronic component,
such as a backlit license plate (especially
fluorescent type), fog lights, fender pole
or wireless antenna is installed near a
sensor ●
Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or low-
ered due to the carried load
• If the orientation of a sensor has been
changed due to a collision or other
impact