lexus LC500 2018 Owner's Manual

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4-5. Using the driving support systems
Driving
Press the LKA switch to turn the LKA
system on.
The LKA indicator comes on and a mes-
sage is displayed on the multi-information
display.
Press the LKA switch again to turn the
LKA system off.
When the LKA system is turned on or off,
operation of the LKA system continues in
the same condition the next time the
engine is started.
LKA indicator
The illumination condition of the indicator
informs the driver of the system operation
status.
Illuminated in white:
LKA system is operating.
Illuminated in green:
Steering wheel assistance 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.
Lane departure alert function dis-
play
Displayed when the multi-information dis-
play is switched to the driving assist system
information screen.
WARNING
●Do not modify the suspension etc. If the suspension etc. needs to be replaced, contact any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●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 any authorized Lexus retailer or
Lexus authorized repairer, or any reli- able repairer.
Turning LKA system on
Indications on multi-information
display
A
B
C

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4-5. Using the driving support systems
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
recognize white (yellow) lines or is
temporarily canceled.
■Operation conditions of each function
●Lane departure alert function
This function operates when all of the fol-
lowing conditions are met.
• LKA is turned on. • Vehicle speed is approximately 50 km/h (32 mph) or more.
• System recognizes white (yellow) lines. • Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• Turn signal lever is not operated. • Vehicle is driven on a straight road or around a gentle curve with a radius of
more than approximately 150 m (492 ft.). • No system malfunctions are detected. ( P.224)
●Steering assist function
This function operates when all of the fol-
lowing conditions are met in addition to the
operation conditions for the lane departure
alert function.
• Setting for “Steering Assist” in of the
multi-information display is set to “On”.
( P.92)
• Vehicle is not accelerated or decelerated by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for changing lanes.
• ABS, VSC, TRC and PCS are not oper- ating.• TRC or VSC is not turned off.
• Except for Israel: Hands off steering wheel alert is not displayed.
●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.92)
• Vehicle speed is approximately 50 km/h (32 mph) or more.• Width of traffic lane is approximately 3 m
(9.8 ft.) or more. • No system malfunctions are detected. ( P.224)
●Lane centering function
This function operates when all of the fol-
lowing conditions are met.
• LKA is turned on. • Setting for “Steering Assist” and “Lane
Center” in of the multi-information
display are set to “On”. ( P.92) • System recognizes white (yellow) lines.• Dynamic radar cruise control with full-
speed range is operating.

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4-5. Using the driving support systems
Driving
• Width of traffic lane is approximately 2.5 to 4.1 m (8.2 to 13.5 ft.).• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius of more than approximately 200 m (656
ft.). • No system malfunctions are detected. ( P.224)
• Vehicle does not accelerate or deceler- ate by a fixed amount or more.• Steering wheel is not operated with a
steering force level suitable for changing lanes.• ABS, VSC, TRC and PCS are not oper-
ating. • TRC or VSC is not turned off.• Except for Israel: Hands off steering
wheel alert is not displayed. • Steering assist function is not operating.
■Temporary cancellation of functions
When operation conditions 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.
■Steering assist function/lane centering
function
Depending on the vehicle speed, lane
departure situation, road 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.
■Hands off steering wheel alert
For Israel: 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 oper-ating, a warning message is displayed on
the multi-information display. If the driver continues to keep the hands off of the steer-ing wheel, a buzzer sounds and a warning
message is displayed. This alert also oper- ates in the same way when the driver con-tinuously operates the steering wheel only a
small amount. However, depending on the road conditions, etc., the function may not
cancel.
Except for Israel: When the system deter-
mines that the driver has removed the hands from the steering wheel while the steering assist function or lane centering
function is operating, a warning message is displayed on the multi-information display. If the driver continues to keep the hands off of
the steering wheel, a warning message is displayed and the function 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 can- cel.
■White (yellow) lines are 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 which 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,
“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 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.

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4-5. Using the driving support systems
●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 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.
■Warning message
If the following warning message is dis- played on the multi-information display and the LKA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce- dure.
Warning mes-
sageDetails/Actions
“Lane Keep-
ing Assist
Malfunction
Visit Your
Dealer”
The system may not be
operating properly.
 Have the vehicle
inspected any authorized
Lexus retailer or Lexus
authorized repairer, or
any reliable repairer.
“Front Cam-
era Vision
Blocked
Clean and
Demist Wind-
shield”
Dirt, rain, condensation,
ice, snow, etc. are present
on the windshield in front
of the camera sensor.
 Turn the LKA system
off, remove any dirt, rain,
condensation, ice, snow,
etc. from the windshield,
and then turn the LKA sys-
tem back on.
“Front Cam-
era Unavail-
able”
The operation conditions
of the camera sensor
(temperature, etc.) are
not met.
 When the operation
conditions of the camera
sensor (temperature, etc.)
are met, the LKA system
will become available.
Turn the LKA system off,
wait for a little while, and
then turn the LKA system
back on.

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4-5. Using the driving support systems
Driving
If a different warning message is displayed, follow the instructions displayed on the screen.
■Customization
The following settings can be changed.
For how to change settings, refer to P.423.“Lane Keep-
ing Assist
Unavailable”
The LKA system is tempo-
rarily canceled due to a
malfunction in a sensor
other than the camera
sensor.
 Turn the LKA system
off and follow the appro-
priate troubleshooting
procedures for warning
messages. Afterward,
drive the vehicle for a
short time, and then turn
the LKA system back on.
“Lane Keep-
ing Assist
Unavailable
Below
Approx
50km/h”
The LKA system cannot
be used as the vehicle
speed is less than approxi-
mately 50 km/h (32
mph).
 Drive the vehicle at
approximately 50 km/h
(32 mph) or more.
“Lane Keep-
ing Assist
Unavailable at
Current
Speed”
The LKA system cannot
be used as the vehicle
speed is too high.
 Slow down.
FunctionSetting details
Lane depar-
ture alert
function
Adjust alert sensitivity
Steering
assist function
Turn steering wheel assis-
tance on and off
Warning mes-
sageDetails/Actions
Vehicle sway
warning func-
tion
Turn function on and off
Adjust alert sensitivity
Lane center-
ing functionTurn function on and off
FunctionSetting details

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4-5. Using the driving support systems
*: If equippedAfter the camera sensor recognizes a
sign, it is displayed on the multi-infor-
mation display when the vehicle passes
the sign.
 When the driving assist system
information is selected, a maximum
of 3 signs can be displayed.
( P.92)
 When other than the driving assist
system information is selected, a
speed limit sign or an all canceled
sign can be displayed. ( P.92)
A no overtaking sign and a speed limit sign
with supplemental mark are not displayed.
However, if signs other than speed limit
signs are recognized, they are mentioned
in a stack under the current speed limit
sign.
RSA (Road Sign Assist)*
RSA recognizes specific road signs
using the camera sensor and
provides information to the driver
via the multi-information display.
If the system judges that the vehicle
is being driven over the speed limit,
performing prohibited actions, etc.
in relation to the recognized road
signs, it alerts the driver using a
warning display and warning
buzzer*.
*: This setting needs to be customized.
WARNING
■Before using the RSA
Do not rely solely upon the RSA system. RSA is a system which supports the
driver by providing in formation, but it is not a replacement for a driver’s own vision and awareness. Drive safely by
always paying careful attention to the traffic rules.
Inappropriate or negligent driving could lead to an unexpected accident.
A
Indication on the multi-informa-
tion display

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4-5. Using the driving support systems
Driving
The following types of road signs, including electronic signs and blinking signs, are
recognized.
A non-official (not meeting the Vienna Conven tion) or a recently introduced traffic sign
may not be recognized.
*1: If the turn signal indicator is not operated when changing lanes, the mark does not dis-
play.
*2: For vehicles with navigation system
Types of recognized road signs
TypeMulti-information display
Speed limit begins/ends
Speed limit with supple-
mental mark (Displayed
simultaneously with
speed limit)
(Display example)
Wet
Rain
Ice
On/off ramp*1
Supplemental mark
exists
(Contents not recog-
nized)
No overtaking begins/ends
No-entry*2
All canceled
(All restrictions canceled. Returns to default road
regulation.)

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4-5. Using the driving support systems
In the following situations, the RSA sys-
tem alerts the driver using a warning
display.
 When the vehicle speed exceeds
the speed warning threshold
applied to the speed limit of the sign
displayed on the multi-information
display, the sign color becomes
inverted.
 If it is detected that your vehicle is
overtaking when a no overtaking
sign is displayed on the multi-infor-
mation display, the sign flashes.
 Vehicles with navigation system:
When the RSA system recognizes a
no-entry sign and detects that the
vehicle has entered a no-entry area
based on the map information of the
navigation system, the no-entry sign
flashes.
Depending on the situation, traffic
environment (traffic direction, speed,
unit) may be detected incorrectly and a
warning display may not operate prop-
erly.
■Automatic turn-off of RSA sign display
One or more signs automatically turn off in the following situations.
●A new sign is not recognized for a certain distance.
●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, and if an electronic sign, the contrast is poor.
●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 vehicle is driven in a country with a different direction of traffic.
●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.
●Roundabout exit road speed signs may be detected and displayed (if positioned in sight of the camera sensor) while trav-
eling on a roundabout.
●Vehicles without navigation system: The
speed information displayed on the meter and that displayed on the naviga-tion system may be different due to the
navigation system using map data.
■When driving vehicle in country with dif- ferent speed unit
Since RSA recognizes signs based on the set unit of the meter, it is necessary to
Warning display

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4-5. Using the driving support systems
Driving
change the set unit of the meter. Adjust the set unit of the meter to the speed unit of signs in the current location. ( P.423)
■Turning the system on/off
1 Select on of the
multi-information display ( P.92)
2 Press “OK” on the steering wheel.
■Speed limit sign display
If the engine switch

was last turned off while a speed limit sign was dis-played on the multi-information display, the
same sign displays again when the engine switch is turned to IGNI-TION ON mode .
■Customization
Setting (e.g. speeding warning threshold) can be changed.
(Customizable feature: P.423)
*:If equipped
■Meter display
Display
Set speed
Indicators
Dynamic radar cruise con-
trol with full-speed range*
In vehicle-to-vehicle distance con-
trol mode, the vehicle automati-
cally accelerates, decelerates and
stops to match the speed changes
of the preceding vehicle even if the
accelerator pedal is not depressed.
In constant speed control mode,
the vehicle runs at a fixed speed.
Use the dynamic radar cruise con-
trol with full-speed range on free-
ways and highways.
 Vehicle-to-vehicle distance con-
trol mode ( P.232)
 Constant speed control mode
( P.236)
System components
A
B
C

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4-5. Using the driving support systems
■Operation switches
Vehicle-to-vehicle distance switch
+/RES switch
Cruise control main switch
Cancel switch
-/SET switch
A
B
C
D
E
WARNING
■Before using dynamic radar cruise control with full-speed range
Driving safely is the sole responsibility of the driver. Do not rely solely on the sys-tem, and drive safely by always paying
careful attention to your surroundings.
The dynamic radar cruise control with
full-speed range provides driving assis- tance to reduce the driver’s burden. However, there are limitations to the
assistance provided.
Set the speed appropriately depending
on the speed limit, traffic flow, road con- ditions, weather conditions, etc. The driver is responsible for checking the set
speed.
Even when the system is functioning nor-
mally, the condition of the preceding vehicle as detected by the system may differ from the condition observed by the
driver. Therefore, the driver must always remain alert, assess the danger of each situation and drive safely. Relying on this
system or assuming the system ensures safety while driving can lead to an acci-dent, resulting in death or serious injury.
■Cautions regarding the driving assist
systems
Observe the following precautions, as
there are limitations to the assistance provided by the system.Failure to do so may cause an accident
resulting in death or serious injury.