Lexus LS500h (2022 year). Manual in english — page 15
252
4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
played on the multi-information display and
the LTA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce-
dure. Also, if a different warning message is
displayed, follow the instructions displayed
on the screen.
●
“LTA Malfunction Visit Your Dealer”
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
●
“LTA Unavailable”
The system is temporarily canceled due to
a malfunction in a sensor other than the
front camera. Turn the LTA system off, wait
for a little while, and then turn the LTA sys-
tem back on.
●
“LTA Unavailable at Current Speed”
The function cannot be used as the vehicle
speed exceeds the LTA operation range.
Drive slower.
■
Lane change assist function warning
messages
If the following warning message is dis-
played on the multi-information display, fol-
low the appropriate troubleshooting
procedure. Also, if a different warning mes-
sage is displayed, follow the instructions dis-
played on the screen.
●
“Lane Change Assist Malfunction Visit
Your Dealer”
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
●
“Lane Change Assist Unavailable See
Owner’s Manual”
The system is temporarily canceled due to
a malfunction in a sensor other than the
front camera. Turn the LTA system off, wait
for a little while, and then turn the LTA sys-
tem back on.
●
“Unavailable Activation Condition not
Satisfied See Owner’s Manual”
The function cannot be used as the operat-
ing conditions have not been met.
(
P.249) Operate the turn signal lever
again after all of the operating conditions
are met.
●
“Unavailable at Current Speed”
The lane change assist function cannot be
used as the vehicle speed is outside of the
operable range. Operate the turn signal
lever again while driving at a vehicle speed
within the operable range. (
●
“Unavailable Surrounding Vehicle
Detected”
The function cannot be used as a vehicle
was detected in the lane toward which the
turn signal was operated. Operate the turn
signal lever again after checking that there
are no other vehicles nearby.
■
Customization
Function settings can be changed. (Cus-
tomizable features:
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4
Driving
While driving on a road with clear
white (yellow) lane lines, the LTA sys-
tem warns the driver if the vehicle may
deviate from the current lane or
course
*
, and also can slightly operate
the steering wheel to help avoid devia-
tion from the lane or course
*
. Also,
while the dynamic radar cruise control
with full-speed range is operating, this
system will operate the steering wheel
to maintain the vehicle’s lane position.
The LTA system recognizes white (yel-
low) lane lines or a course
*
using the
front camera. Additionally, it detects
preceding vehicles using the front
camera and radar.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
LTA (Lane Tracing Assist)
(vehicles with Lexus Safety
System + 2.5)
Summary of functions
WARNING
■
Before using LTA system
●
Do not rely solely upon the LTA sys-
tem. The LTA system does not auto-
matically 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 driving safely by pay-
ing careful attention to the surround-
ing conditions and operating 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.
■
Situations unsuitable for LTA system
In the following situations, use the LTA
switch to turn the system off. Failure to do
so may lead to an accident, resulting in
death or serious injury.
●
Vehicle is driven on a road surface
which is slippery due to rainy weather,
fallen snow, freezing, etc.
●
Vehicle is driven on a snow-covered
road.
●
White (yellow) lines are difficult to see
due to rain, snow, fog, dust, etc.
●
Vehicle is driven in a temporary lane or
restricted lane due to construction
work.
●
Vehicle is driven in a construction
zone.
●
A spare tire, tire chains, etc. are
equipped.
●
When the tires have been excessively
worn, or when the tire inflation pres-
sure is low.
●
During emergency towing.
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LEXUS LS500h Owner's Manual
WARNING
■
Preventing LTA 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.
■
Conditions in which functions may
not operate properly
In the following situations, the functions
may not operate properly and the vehicle
may depart from its lane. Drive safely by
always paying careful attention to your
surroundings and operate the steering
wheel to correct the path of the vehicle
without relying solely on the functions.
●
When the follow-up cruising display is
displayed (
ing vehicle changes lanes. (Your vehi-
cle may follow the preceding vehicle
and also change lanes.)
●
When the follow-up cruising display is
displayed (
ing vehicle is swaying. (Your vehicle
may sway accordingly and depart from
the lane.)
●
When the follow-up cruising display is
displayed (
P.259) and the preced-
ing vehicle departs from its lane. (Your
vehicle may follow the preceding vehi-
cle and depart from the lane.)
●
When the follow-up cruising display is
displayed (
P.259) and the preced-
ing vehicle is being driven extremely
close to the left/right lane line. (Your
vehicle may follow the preceding vehi-
cle and depart from the lane.)
●
Vehicle is being driven around a sharp
curve.
●
Objects or patterns that could be mis-
taken for white (yellow) lines are pres-
ent on the side of the road (guardrails,
reflective poles, etc.).
●
Vehicle is driven where the road
diverges, merges, etc.
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Driving
WARNING
●
Repair marks of asphalt, white (yellow)
lines, etc. are present due to road
repair.
●
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 inter-
section, 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 recognize than
lines that are white).
●
The white (yellow) lines cross over a
curb, etc.
●
The vehicle is driven on a bright sur-
face, 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 oncom-
ing 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 traffic lane is excessively narrow
or wide.
●
The vehicle is extremely tilted due to
carrying 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).
●
When driving in a tunnel or at night
with the headlights off or when a head-
light is dim due to its lens being dirty or
it being misaligned.
●
The vehicle is struck by a crosswind.
●
The vehicle is affected by wind from a
vehicle driven in a nearby lane.
●
The vehicle has just changed lanes or
crossed an intersection.
●
Tires which differ by structure, manu-
facturer, brand or tread pattern are
used.
●
When tires of a size other than speci-
fied are installed.
●
Snow tires, etc. are equipped.
●
The vehicle is being driven at
extremely high speeds.
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4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
■
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.
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 vehi-
cle might depart from its lane and that the
possibility of a collision with an overtaking
vehicle in the adjacent lane is high, the lane
departure alert will operate even if the turn
signals are operating.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
■
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.
When the system determines that the vehi-
cle 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.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
■
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.
Functions included in LTA system
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■
Lane centering function
This function is linked with dynamic
radar cruise control with full-speed
range and provides the required assis-
tance by operating the steering wheel
to keep the vehicle in its current lane.
When dynamic radar cruise control with
full-speed range is not operating, 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 operate to help follow a preceding
vehicle by monitoring the position of the
preceding vehicle.
■
Turning the LTA system on
Press the LTA switch.
When the LTA system will turn on, the LTA
indicator will illuminate and a message will
be displayed on the multi-information dis-
play.
Also, the lane centering function will
change between on/off each time the
switch is pressed.
Lane centering function off: “LTA Steering
Assist Active” is displayed.
Lane centering function on: “LTA Steering
LTA system setting
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4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
Assist Active Lane centering Active” is dis-
played.
When the LTA system is turned on, opera-
tion of the LTA system continues in the
same condition the next time the hybrid
system is started.
■
Turning the LTA system off
Press and hold the LTA switch.
The LTA indicator light turns off when the
LTA is turned off.
When the LTA system is turned off, opera-
tion of the LTA system continues in the
same condition the next time the hybrid
system is started.
LTA indicator
The illumination condition of the indicator
informs the driver of the system operation
status.
Illuminated in white: LTA system is operat-
ing.
Illuminated in green: Steering wheel assis-
tance 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
Displayed when the multi-information dis-
play is switched to the driving support sys-
tem information display.
Indicates that steering wheel assistance of
the steering assist function or lane center-
ing function is operating.
Both outer sides of the lane are displayed:
Indicates that steering wheel assist of the
lane centering function is operating.
One outer side of the lane is displayed:
Indicates that steering wheel assist of the
steering assist function is operating.
Both outer sides of the lane are flashing:
Alerts the driver that their input is neces-
sary to stay in the center of the lane (lane
centering function).
Lane departure alert function dis-
play
Displayed when the multi-information dis-
play is switched to the driving support sys-
tem information display.
Inside of displayed lines is white
Indicates that the system is recognizing
white (yellow) lines or a course
*
. When
the vehicle departs from its lane, the
white line displayed on the side the
vehicle departs from flashes orange.
Indications on multi-information
display
A
B
C
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Driving
Inside of displayed lines is black
Indicates that the system is not able to
recognize white (yellow) lines or a
course
*
or is temporarily canceled.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
Follow-up cruising display
Displayed when the multi-information dis-
play is switched to the driving support sys-
tem information display.
Indicates 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 moves,
your vehicle may move in the same way.
Always pay careful attention to your sur-
roundings and operate the steering wheel
as necessary to correct the path of the
vehicle and ensure safety.
■
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.
*1
• System recognizes white (yellow) lane
lines or a course
*2
. (When a white [yel-
low] line or course
*2
is recognized 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 another vehicle is in the lane on the
side where the turn signal was operated)
• Vehicle is not being driven around a
sharp curve.
• No system malfunctions are detected.
(
*1
: The function operates even if the vehi-
cle speed is less than approximately 32
mph (50 km/h) when the lane center-
ing function is operating.
*2
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
●
Steering assist function
This function operates when all of the fol-
lowing conditions are met in addition to the
operation conditions for the lane depar-
ture alert function.
• 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, TRAC and PCS are not oper-
ating.
• TRAC or VSC is not turned off.
●
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.84)
• Vehicle speed is approximately 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.
(
●
Lane centering function
This function operates when all of the fol-
lowing conditions are met.
• LTA is turned on.
• Setting for “Lane Center” in
of the
multi-information display is set to “ON”.
(
P.84)
• This function recognizes white (yellow)
lane lines or the position of a preceding
vehicle (except when the preceding vehi-
D
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4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
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.
(
• 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, TRAC and PCS are not oper-
ating.
• TRAC or VSC is not turned off.
• Hands off steering wheel warning is not
displayed. (
• The vehicle is being driven in the center
of a lane.
• Steering assist function is not operating.
■
Temporary cancelation of functions
●
When operation conditions are no longer
met, a function may be temporarily can-
celed. However, when the operation con-
ditions are met again, operation of the
function is automatically restored.
(
●
If the operation conditions (
no longer met while the lane centering
function is operating, the steering wheel
may vibrate and the buzzer may sound to
indicate that the function has been tem-
porarily canceled. However, if the “Alert”
customization setting is set to
,
the system will notify the driver by vibrat-
ing the steering wheel instead of sound-
ing the buzzer.
■
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
operating or the function may not oper-
ate at all.
●
The steering control of the function is
overridden by the driver’s steering wheel
operation.
●
Do not attempt to test the operation of
the steering assist function.
■
Lane departure alert function
●
The warning buzzer may be difficult to
hear due to external noise, audio play-
back, etc. Also, it may be difficult to feel
steering wheel vibrations due to the road
conditions, etc.
●
If the edge of the course
*
is not clear or
straight, the lane departure alert function
may not operate.
●
It may not be possible for the system to
determine if there is a danger of a colli-
sion with a vehicle in an adjacent lane.
●
Do not attempt to test the operation of
the lane departure alert function.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
■
Hands off steering wheel warning
In the following situations, a warning mes-
sage urging the driver to hold the steering
wheel and the symbol shown in the illustra-
tion are displayed on the multi-information
display to warn the driver. The warning
stops when the system determines that the
driver holds the steering wheel. Always
keep your hands on the steering wheel
when using this system, regardless of warn-
ings.
●
When the system determines the driver is
not holding the steering wheel while the
lane centering function is operating.
If the driver continues to keep their hands
off of the steering wheel, the buzzer
sounds, the driver is warned and the func-
tion is temporarily canceled. This warning
also operates in the same way when the
driver continuously operates the steering
wheel only a small amount.
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Driving
The buzzer also sounds even if the alert
type is set to
.
●
When the system determines that the
vehicle may deviate from the lane while
driving around a curve while the lane
centering function is operating.
●
When the system determines that the
driver is driving without holding the steer-
ing wheel while the steering wheel assist
of the steering assist function is operating
If the driver continues to keep their hands
off of the steering wheel and the steering
wheel assist is operating, the buzzer
sounds and the driver is warned. Each time
the buzzer sounds, the continuing time of
the buzzer becomes longer.
The buzzer also sounds even if the alert
type is set to
.
■
Vehicle sway warning function
When the system determines that the vehi-
cle is swaying while the vehicle sway warn-
ing function is operating, a buzzer sounds
and a warning message urging the driver to
rest and the symbol shown in the illustration
are simultaneously displayed on the
multi-information display.
Depending on the vehicle and road condi-
tions, the warning may not operate.
■
Warning message
If the following warning message is dis-
played on the multi-information display and
the LTA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce-
dure. Also, if a different warning message is
displayed, follow the instructions displayed
on the screen.
●
“LTA Malfunction Visit Your Dealer”
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
●
“LTA Unavailable”
The system is temporarily canceled due to
a malfunction in a sensor other than the
front camera. Turn the LTA system off, wait
for a little while, and then turn the LTA sys-
tem back on.
●
“LTA Unavailable at Current Speed”
The function cannot be used as the vehicle
speed exceeds the LTA operation range.
Drive slower.
■
Customization
Function settings can be changed. (Cus-
tomizable features:
262
4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
*
: If equipped
The RSA system recognizes specific
road signs using the front camera
and/or navigation system (when speed
limit information is available) to provide
information to the driver via the display.
If the system judges that the vehicle is
being driven over the speed limit, per-
forming prohibited actions, etc.
according to the recognized road
signs, it notifies the driver through a
visual notification and notification
buzzer.
When the front camera recognizes a
sign and/or information of a sign is
available from the navigation system,
the sign will be displayed on the
multi-information display.
When the Driving support system
information display is selected, a
maximum of 3 signs can be dis-
played. (
When a tab other than the Driving
support system information display
is selected, the following types of
road signs will be displayed.
(
• Speed limit sign
• Do Not Enter sign (when notification is
necessary)
If signs other than speed limit signs are rec-
ognized, they will be displayed in an over-
lapping stack under the current speed limit
sign.
RSA (Road Sign Assist)
*
Summary of function
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.
Indication on the multi-informa-
tion display
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The following types of road signs,
including electronic signs and blinking
signs, are recognized.
A non-official or a recently introduced traf-
fic sign may not be recognized.
In the following situations, the RSA sys-
tem will notify the driver.
When the vehicle speed exceeds
the speed notification 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, a notifica-
tion function may not operate properly.
■
Setting procedure
1
Press
or
of the meter control
switches and select
.
2
Press
or
of the meter control
switches and select “Vehicle Settings”,
then press
.
3
Press
or
of the meter control
switches and select
, then press
.
4
Press
or
of the meter control
switches and select “RSA”, then press
.
■
Automatic turn-off of RSA sign display
In the following situations, a displayed
speed limit sign and/or do not enter sign will
stop being displayed automatically:
●
No sign has been recognized for a cer-
tain distance.
●
The road changes due to a left or right
turn, etc.
In the following situations, stop and yield
signs will stop being displayed automati-
cally:
●
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 front camera 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 front camera.
●
In inclement weather such as heavy rain,
fog, snow or sand storms.
●
Light from an oncoming vehicle, the sun,
etc. enters the front camera.
Supported types of road signs
Speed limit
US Night speed limit
Do Not Enter
Stop
Yield
Notification function
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4-5. Using the driving support systems
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●
The sign is dirty, faded, tilted or bent.
●
The contrast of electronic sign is low.
●
All or part of the sign is hidden by the
leaves of a tree, a pole, etc.
●
The sign is only visible to the front camera
for a short amount of time.
●
The driving scene (turning, lane change,
etc.) is judged incorrectly.
●
If a sign not appropriate for the currently
traveled lane, but the sign exists directly
after a freeway branches, or in an adja-
cent lane just before merging.
●
Stickers are attached to the rear of the
preceding vehicle.
●
A sign resembling a system compatible
sign is recognized.
●
Side road speed signs may be detected
and displayed (if positioned in sight of the
front camera) while the vehicle is travel-
ing on the main road.
●
Roundabout exit road speed signs may
be detected and displayed (if positioned
in sight of the front camera) while travel-
ing on a roundabout.
●
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 map data is outdated.
●
The navigation system is not operating.
●
When driving in an area where
Advanced Drive operation is not possi-
ble. (if equipped)
●
The speed information displayed on the
meter and on the navigation system may
be different due to the navigation system
using map data.
■
Speed limit sign display
If the power switch was last turned off while
a speed limit sign was displayed on the
multi-information display, the same sign dis-
plays again when the power switch is turned
to ON mode.
■
If “RSA Malfunction Visit Your Dealer”
is shown
The system may be malfunctioning. Have
the vehicle inspected by your Lexus dealer.
■
Customization
Some functions can be customized. (Cus-
tomizable features:
265
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Driving
In vehicle-to-vehicle distance control
mode, the vehicle automatically accel-
erates, decelerates and stops to match
the speed changes of the preceding
vehicle even if the accelerator pedal is
not depressed. In constant speed con-
trol mode, the vehicle runs at a fixed
speed.
Use the dynamic radar cruise control
with full-speed range on freeways and
highways.
Vehicle-to-vehicle distance control
mode (
Constant speed control mode
(
■
Meter display
Multi-information display
Set speed
Indicators
■
Operation switches
Vehicles without Advanced Drive
Vehicle-to-vehicle distance switch
“+RES” switch
Cruise control main switch
Cancel switch
“-SET” switch
Vehicles with Advanced Drive
Vehicle-to-vehicle distance switch
“+RES” switch
Advanced Drive main switch
Cancel switch
“-SET” switch
Dynamic radar cruise con-
trol with full-speed range
Summary of functions
System Components
A
B
C
A
B
C
D
E
A
B
C
D
E
266
4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
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
system, and drive safely by always pay-
ing careful attention to your surround-
ings.
●
The dynamic radar cruise control with
full-speed range provides driving
assistance to reduce the driver’s bur-
den. However, there are limitations to
the assistance provided.
Read the following conditions care-
fully. Do not overly rely on this system
and always drive carefully.
• When the sensor ma
y not be correctly
detecting the vehicle ahead:
• Conditions under which the vehi-
cle-to-vehicle distance control mode
may not function correctly:
●
Set the speed appropriately depend-
ing on the speed limit, traffic flow, road
conditions, weather conditions, etc.
The driver is responsible for checking
the set speed.
●
Even when the system is functioning
normally, the condition of the preced-
ing 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 solely on this system or
assuming the system ensures safety
while driving can lead to an accident,
resulting in death or serious injury.
●
Vehicles without Advanced Drive:
Switch the dynamic radar cruise con-
trol with full-speed range setting to off,
using the cruise control main switch
when not in use.
■
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.
●
Assisting the driver to measure follow-
ing distance
The dynamic radar cruise control with
full-speed range is only intended to help
the driver in determining the following
distance between the driver’s own vehi-
cle and a designated vehicle traveling
ahead. It is not a mechanism that allows
careless or inattentive driving, and it is
not a system that can assist the driver in
low-visibility conditions.
It is still necessary for driver to pay close
attention to the vehicle’s surroundings.
●
Assisting the driver to judge proper
following distance
The dynamic radar cruise control with
full-speed range determines whether the
following distance between the driver’s
own vehicle and a designated vehicle
traveling ahead is within a set range. It is
not capable of making any other type of
judgement. Therefore, it is absolutely
necessary for the driver to remain vigi-
lant and to determine whether or not
there is a possibility of danger in any
given situation.
●
Assisting the driver to operate the
vehicle
The dynamic radar cruise control with
full-speed range does not include func-
tions which will prevent or avoid colli-
sions with vehicles ahead of your vehicle.
Therefore, if there is ever any possibility
of danger, the driver must take immedi-
ate and direct control of the vehicle and
act appropriately in order to ensure the
safety of all involved.
267
4-5. Using the driving support systems
LEXUS LS500h Owner's Manual
4
Driving
This mode employs a radar to detect the presence of vehicles up to approximately
328 ft. (100 m) ahead, determines the current vehicle-to-vehicle following dis-
WARNING
■
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 accident 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 detecting correctly (fog,
snow, sandstorm, heavy rain, etc.)
●
When there is rain, snow, etc. on the
front surface of the radar or front cam-
era
●
In traffic conditions that require fre-
quent repeated acceleration and
deceleration
●
During emergency towing
●
When an approach warning buzzer is
heard often
Driving in vehicle-to-vehicle distance control mode
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