2018 LEXUS LS500H sensor

240 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) *
: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 or the steering wheel
vibrates to alert the driver. When the warning buzzer sounds or
the steering wheel vibrates, 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.
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 function is tem-
porarily canceled.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 windshield.
Functions included in LKA sys-
tem

246 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ■
Warning message
If the following warning message is dis-
played on the multi-information display and
the LKA indicator illumi nates in orange, fol-
low the appropriate troubleshooting proce-
dure.
If a different warning message is displayed,
follow the instructio ns displayed on the
screen.
■
Customization
The following settings can be changed.Warning message Details/Actions
“Lane Keeping
Assist Malfunc-
tion 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 LKA sys-
tem off, remove any
dirt, rain, condensa-
tion, ice, snow, etc.,
from the windshield,
and then turn the LKA
system back on. “Front Camera
Unavailable” The operation condi-
tions of the camera
sensor (temperature,
etc.) are not met.
→ When the opera-
tion conditions of the
camera sensor (tem-
perature, 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.
“Lane Keeping
Assist Unavail-
able” The LKA system is
temporarily canceled
due to a malfunction in
a sensor other than the
camera sensor.
→ Turn the LKA sys-
tem off and follow the
appropriate trouble-
shooting procedures
for the warning mes-
sage. Afterward, drive
the vehicle for a short
time, and then turn the
LKA system back on.
Function Setting details
Lane departure
alert function Adjust alert sensitivity
Adjust alert type
Steering assist
function Turn steering wheel
assistance on and offWarning message Details/Actions

2474-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving For how to change settings, refer to
→ P.481 *
: If equipped
Vehicle sway
warning function Turn function on and
off
Adjust alert sensitivity
Lane centering
function Turn function on and
offFunction Setting details
RSA (Road Sign Assist) *
The RSA system recognizes spe-
cific road signs using the camera
sensor and navigation system
(when data is available) to provide
information to the driver via the
multi-information display and
head-up 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 information, 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 neg ligent driving could
lead to an unexpected accident.

248 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) When the camera sensor recognizes a
sign or information of a sign is available
from the navigation system , the sign
will be displayed on the multi-informa-
tion display.
 When the driving support system
information is selected, a maximum
of 3 signs can be displayed.
( → P.86)  When a tab other than the driving
support system information tab is
selected, only a recognized speed
limit sign or do not enter sign (when
notification is necessary) will be dis-
played. ( → P.86)
If signs other than speed limit signs are rec-
ognized, they will be displayed in an over-
lapping stack under th e current speed limit
sign.
The following types of ro ad signs are recognized.Non-official or recently introduced traffic signs may not be recognized.Indication on the multi-informa-
tion display
Supported types of road signs Type Multi-information display
Speed limit begins/ends *
Do Not Enter

2494-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving *
: 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-informa-
tion display ( → P.86)
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 stop 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.Stop
Yield Type Multi-information display
Warning indication

250 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ●
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.●
Roundabout exit road speed signs may
be detected and displayed (if positioned
in sight of the camera sensor) while trav-
eling on a roundabout.■
Speed limit sign display
If the power switch was last turned off while
a speed limit sign wa s displayed on the
multi-information display, the same sign dis-
plays again when the power switch is turned
to ON mode. ■
Customization
Some functions can be customized.
( → P.481) ■
Meter display
Display
Set speed
IndicatorsDynamic radar cruise con-
trol with full-speed range In vehicle-to-vehicle distance con-
trol mode, the ve hicle 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.253)
 Constant speed control mode
( → P.257)
System Components
A
B
C

252 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) WARNING■
To avoid inadvertent dynamic radar
cruise control with full-speed range
activation
Switch the dynamic radar cruise control
with full-speed range setting to off, using
the cruise control main switch when not
in use. ■
Situations unsuitable for dynamic
radar cruise control with full-speed
range
Do not use dynamic radar cruise control
with full-speed range in any of the follow-
ing situations.
Doing so may result in inappropriate
speed control and could cause an acci-
dent resulting in death or serious injury. ●
Roads where there are pedestrians,
cyclists, etc.●
In heavy traffic●
On roads with sharp bends●
On winding roads●
On slippery roads, such as those cov-
ered with rain, ice or snow●
On steep downhills , or where there
are sudden changes between sharp up
and down gradients
Vehicle speed may exceed the set
speed when driving down a steep hill.
●
At entrances to freeways and highways
●
When weather conditions are bad
enough that they may prevent the sen-
sors from detectin g correctly (fog,
snow, sandstorm, heavy rain, etc.)
●
When there is rain, snow, etc. on the
front surface of the radar sensor or
camera sensor
●
In traffic conditions that require fre-
quent repeated acceleration and
deceleration
●
When an approach warning buzzer is
heard often

2534-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving 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