Lexus ES (2023 year). Manual in english

246

4-5. Using the driving support systems

Have the vehicle inspected by any autho-
rized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

●

“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 system
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.
(Customizable features:



P.461)

: If equipped

When the front camera recognizes a

RSA (Road Sign Assist)

The RSA system recognizes spe-
cific road signs using the front cam-
era 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,
performing prohibited actions, etc.
according to the recognized road
signs, it notifies the driver through a
visual notification and notification
buzzer or steering wheel vibration.

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

247

4-5. Using the driving support systems

ivin
g

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 is selected, a maximum
of 3 signs can be displayed.
(



P.109)



When a tab other than the driving
support system information is
selected, the following types of road
signs will be displayed. (



P.109)

• Speed limit begins/ends sign
• Speed limit related information sign

(Motorway, Expressway, Urban area,
Residential area)

• End of prohibition sign

• No-entry sign

(when notification is nec-

essary)

• Speed limit with supplemental sign

(Ramp way only)

: For vehicles with navigation system

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.

The following types of road signs,
including electronic signs and blinking
signs, are displayed.

A non-official (not meeting the Vienna
Convention) or a recently introduced traf-
fic sign may not be displayed.



Speed limit road signs

: Speed limit begins/Maximum

speed zone begins

: Speed limit ends/Maximum

speed zone ends

: No speed limit information

is dis-

played when neither speed limit road
sign nor speed limit related information
is available.



Speed limit related information

*1, 2

: Motorway entrance

Supported types of road signs

248

4-5. Using the driving support systems

: Motorway exit

: Expressway entrance

: Expressway exit

: Urban area beginning

: Urban area ending

: Urban area beginning

: Urban area ending

: Residential area beginning

: Residential area ending

: Displayed when a sign is recognized

but speed limit information for the road
is not available from the navigation sys-
tem

: No speed limit information

is dis-

played when neither speed limit road
sign nor speed limit related information
is available.



No-overtaking road signs

: No overtaking begins

: No overtaking ends



Other road signs

: No-entry

: End of prohibition

: Stop

: For vehicles with navigation system



Speed limit with supplemental
mark

: Wet

: Rain

: Ice

: Supplemental mark exists

: Exit ramp on right

: Exit ramp on left

: Time

: Displayed simultaneously with speed

limit

: Contents not recognized.

: If the turn signal indicator is not oper-

ated when changing lanes, the mark
does not display.

249

4-5. Using the driving support systems

ivin
g

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
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 and a buzzer will sound. (For
vehicles with navigation system)



If it is detected that your vehicle is
overtaking when a no overtaking
sign is displayed on the multi-infor-
mation display, the displayed sign
will flash and a steering wheel will
vibrate.

Depending on the situation, traffic
environment (traffic direction, speed
unit) may be detected incorrectly and a
notification function may not operate
properly.

■

Setting procedure

Press

of the meter control

switches and select

Press

of the meter control

switches and select “Vehicle Settings”,
then press “OK”

Press

of the meter control

switches and select

, then press

“OK”

Press

of the meter control

switches and select “RSA”, then press
“OK”

■

Automatic turn-off of RSA sign display

One or more signs automatically turn off in

the following situations.

●

No sign has been recognized for a cer-

tain 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 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.

●

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-

Notification function

250

4-5. Using the driving support systems

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 vehicle is driven in a country with a

different direction of traffic.

●

The navigation system map data is out-

dated.

●

The navigation system is not operating.

●

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 any authorized

Lexus retailer or Lexus authorized repairer,

or any reliable repairer.

■

Customization

Some functions can be customized. (Cus-

tomizable features:



P.461)

: If equipped

■

Meter display

Multi-information 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.253)



Constant speed control mode
(



P.257)

System Components

A
B
C

251

4-5. Using the driving support systems

ivin
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■

Operation switches

Vehicle-to-vehicle distance switch

“+RES” switch

Cruise control main switch

Cancel switch

“-SET” switch

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 may not be correctly

detecting the vehicle ahead:



P.260

• Conditions under which the vehicle-

to-vehicle distance control mode may

not function correctly:



P.261

A
B
C
D

●

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.

●

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 fol-

lowing distance between the driver’s

own vehicle and a designated vehicle

traveling ahead. It is not a mechanism

that allows careless or inattentive driv-

ing, 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.

252

4-5. Using the driving support systems

WARNING

●

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 vigilant 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

functions which will prevent or avoid

collisions with vehicles ahead of your

vehicle. Therefore, if there is ever any

possibility of danger, the driver must

take immediate and direct control of

the vehicle and act appropriately in

order to ensure the safety of all

involved.

■

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 high-

ways

●

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

253

4-5. Using the driving support systems

ivin
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This mode employs a radar to detect the presence of vehicles up to approximately
100 m (328 ft.) ahead, determines the current vehicle-to-vehicle following dis-
tance, and operates to maintain a suitable following distance from the vehicle
ahead. The desired vehicle-to-vehicle distance can also be set by operating the
vehicle-to-vehicle distance switch.

When driving on downhill slopes, the vehicle-to-vehicle distance may become shorter.

Example of constant speed cruising
When there are no vehicles ahead

The vehicle travels at the speed set by the driver.

Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appears

When 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 system 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 the system cannot decelerate sufficiently to
prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your vehicle 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 (start-off operation) will resume follow-up cruising. If the start-off
operation is not performed, system control continues to keep your vehicle stopped.
When the turn signal lever is operated and your vehicle moves to an overtaking lane while
driving at 80 km/h (50 mph) or more, the vehicle will accelerate to help to overtake a
passing vehicle.

Driving in vehicle-to-vehicle distance control mode

254

4-5. Using the driving support systems

The system’s identification of what is an overtaking lane may be determined solely based on
the location of the steering wheel in the vehicle (left side driver position versus right side
driver position.) If the vehicle is driven to a region where the overtaking lane is on a differ-
ent side from where the vehicle is normally driven, the vehicle may accelerate when the
turn signal lever is operated in the opposite direction to the overtaking lane (e.g., if the
driver normally operates the vehicle in a region where the overtaking lane is to the right but
then drives to a region where the overtaking lane is to the left, the vehicle may accelerate
when the right turn signal is activated).

Example of acceleration
When there are no longer any preceding vehicles driving slower than the set
speed

The system accelerates until the set speed is reached. The system then returns to constant
speed cruising.

Press the cruise control main
switch to activate the cruise con-
trol.

Dynamic radar cruise control indicator will

come on and a message will be displayed

on the multi-information display. Press the

switch again to deactivate the cruise con-

trol.
If the cruise control main switch is pressed

and held for 1.5 seconds or more, the sys-

tem turns on in constant speed control

mode. (



P.257)

Accelerate or decelerate, with
accelerator pedal operation, to the

desired vehicle speed (at or above
approximately 30 km/h [20 mph])
and press the “-SET” switch to set
the speed.

Cruise control “SET” indicator will come

on.
The vehicle speed at the moment the

switch is released becomes the set speed.



Adjusting the set speed by the
switch

To change the set speed, press the
“+RES” or “-SET” switch until the
desired set speed is displayed.

Setting the vehicle speed (vehi-
cle-to-vehicle distance control
mode)

Adjusting the set speed

255

4-5. Using the driving support systems

ivin
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Increases the speed
(Except when the vehicle has been
stopped by system control in vehi-
cle-to-vehicle distance control
mode)

Decreases the speed

Fine adjustment: Press the switch.
Large adjustment: Press and hold the
switch to change the speed, and release
when the desired speed is reached.

In the vehicle-to-vehicle distance con-
trol mode, the set speed will be
increased or decreased as follows:

Fine adjustment: By 1 km/h (0.6 mph)

or 1

mph (1.6 km/h)

each time the switch is

pressed
Large adjustment: Increases or decreases
in 5 km/h (3.1 mph)

or 5 mph (8 km/h)

increments for as long as the switch is held

In the constant speed control mode
(



P.257), the set speed will be

increased or decreased as follows:

Fine adjustment: By 1 km/h (0.6 mph)

or 1

mph (1.6 km/h)

each time the switch is

pressed
Large adjustment: The speed will continue
to change while the switch is held.

: When the set speed is shown in “km/h”

: When the set speed is shown in “MPH”



Increasing the set speed by the
accelerator pedal

Accelerate with accelerator pedal
operation to the desired vehicle
speed

Press the “-SET” switch

Pressing the switch changes the vehi-
cle-to-vehicle distance as follows:

Long

Medium

Short

If a vehicle is running ahead of you, the pre-
ceding vehicle mark

will also be dis-

played.

Select a distance from the table below.
Note that the distances shown corre-
spond to a vehicle speed of 80 km/h
(50 mph). Vehicle-to-vehicle distance
increases/decreases in accordance

Changing the vehicle-to-vehicle
distance (vehicle-to-vehicle dis-
tance control mode)

Vehicle-to-vehicle distance set-
tings (vehicle-to-vehicle dis-
tance control mode)

256

4-5. Using the driving support systems

with vehicle speed. When the vehicle is
stopped by system control, the vehicle
stops at a certain vehicle-to-vehicle
distance depending on the situation.

After the vehicle ahead of you starts
off, press the “+RES” switch.
Your vehicle will also resume follow-
up cruising if the accelerator pedal is
depressed after the vehicle ahead of
you starts off.

Pressing the cancel switch cancels
the speed control.

The speed control is also canceled when
the brake pedal is depressed.
(When the vehicle has been stopped by
system control, depressing the brake pedal
does not cancel the setting.)

Pressing the “+RES” switch
resumes the cruise control and
returns vehicle speed to the set
speed.

When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the
driver. An example of this would be if
another driver cuts in front of you while
you are following a vehicle. Depress
the brake pedal to ensure an appropri-
ate vehicle-to-vehicle distance.

Distance options

Vehicle-to-vehicle

distance

Long

Approximately 50

m (160 ft.)

Medium

Approximately 40

m (130 ft.)

Short

Approximately 30

m (100 ft.)

Resuming follow-up cruising
when the vehicle has been
stopped by system control (vehi-
cle-to-vehicle distance control
mode)

Canceling and resuming the
speed control

Approach warning (vehicle-to-
vehicle distance control mode)

257

4-5. Using the driving support systems

ivin
g

■

Warnings may not occur when

In the following instances, warnings
may not occur even when the vehicle-
to-vehicle distance is small.



When the speed of the preceding
vehicle matches or exceeds your
vehicle speed



When the preceding vehicle is trav-
eling at an extremely slow speed



Immediately after the cruise control
speed was set



When depressing the accelerator
pedal

While driving in vehicle-to-vehicle dis-
tance control mode, this function will
reduce the vehicle speed, if it is deter-
mined to be necessary.

■

Function operation

When the steering wheel begins to be
turned, the vehicle speed will begin
being reduced. When the steering
wheel is returned to the center posi-
tion, the vehicle speed reduction will
end.
Depending on the situation, the vehicle

speed will then return to the vehicle-to-
vehicle distance control mode set
speed.
In situations where vehicle-to-vehicle
distance control needs to operate,
such as when a preceding vehicle cuts
in front of your vehicle, the curve
speed reduction function will be can-
celed.

■

Operation display

Displayed when the vehicle speed is
being reduced.

When the vehicle speed reduction ends,
the display will disappear.

■

Changing the settings of the curve
speed reduction function

The curve speed reduction function
can be enabled/disabled and the vehi-
cle speed reduction strength can be
adjusted on

(



P.109) of the multi-

information display.

The setting will change each time the “OK”
meter control switch is pressed.

When constant speed control mode is
selected, your vehicle will maintain a

Curve speed reduction function

Selecting constant speed con-
trol mode

258

4-5. Using the driving support systems

set speed without controlling the vehi-
cle-to-vehicle distance. Select this
mode only when vehicle-to-vehicle
distance control mode does not func-
tion correctly due to a dirty radar, etc.

With the cruise control off, press
and hold the cruise control main
switch for 1.5 seconds or more.

Immediately after the switch is pressed, the

dynamic radar cruise control indicator will

come on. Afterwards, it switches to the

cruise control indicator.
Switching to constant speed control mode

is only possible when operating the switch

with the cruise control off.

Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 30 km/h [20 mph])
and press the “-SET” switch to set
the speed.

Cruise control “SET” indicator will come

on.
The vehicle speed at the moment the

switch is released becomes the set speed.
Adjusting the speed setting:



P.254

Canceling and resuming the speed setting:



P.256

When this function is enabled and the
system is operating in vehicle-to-vehi-
cle distance control mode (



P.253),

when a speed limit sign is detected, the
recognized speed limit will be dis-
played with an up/down arrow. The set
speed can be increased/reduced to
the recognized speed limit by pressing
and holding the “+RES”/“-SET” switch.



When the current set speed is lower
than the recognized speed limit

Press and hold the “+RES” switch.



When the current set speed is
higher than the recognized speed
limit

Dynamic Radar Cruise Control
with Road Sign Assist (if
equipped)

259

4-5. Using the driving support systems

ivin
g

Press and hold the “-SET” switch.

Dynamic Radar Cruise Control with
Road Sign Assist can be enabled/dis-
abled in

on the multi-information

display. (



P.109)

When the Dynamic Radar Cruise
Control with Road Sign Assist is oper-
ating, while driving down a hill, the
vehicle speed may exceed the set
speed.
In this case, the displayed set vehicle
speed will be highlighted and a buzzer
will sound to alert the driver.

■

Dynamic radar cruise control with full-

speed range can be set when

●

The shift lever is in D.

●

The desired set speed can be set when

the vehicle speed is approximately 30

km/h (20 mph) or more. (However,

when the vehicle speed is set while driv-

ing at below approximately 30 km/h [20

mph], the set speed will be set to approxi-

mately 30 km/h [20 mph].)

■

Accelerating after setting the vehicle

speed

The vehicle can accelerate by operating the

accelerator pedal. After accelerating, the

set speed resumes. However, during vehi-

cle-to-vehicle distance control mode, the

vehicle speed may decrease below the set

speed in order to maintain the distance to

the preceding vehicle.

■

When the vehicle stops while follow-up

cruising

●

Pressing the “+RES” switch while the

vehicle ahead stops will resume follow-

up cruising if the vehicle ahead starts off

within approximately 3 seconds after the

switch is pressed.

●

If the vehicle ahead starts off within 3 sec-

onds after your vehicle stops, follow-up

cruising will be resumed.

■

Automatic cancelation of vehicle-to-

vehicle distance control mode

Vehicle-to-vehicle distance control mode is

automatically canceled in the following situ-

ations.

●

VSC is activated.

●

TRC is activated for a period of time.

●

When the VSC or TRC system is turned

off.

●

The sensor cannot detect correctly

because it is covered in some way.

●

When the brake control or output

restriction control of a driving support

system operates. (For example: Pre-Col-

lision System, Drive-Start Control)

●

The parking brake is operated.

●

The vehicle is stopped by system control

on a steep incline.

●

The following are detected when the

vehicle has been stopped by system con-

trol:

• The driver is not wearing a seat belt.

• The driver’s door is opened.

• The vehicle has been stopped for about 3

minutes

If vehicle-to-vehicle distance control mode
is automatically canceled for any reasons
other than the above, there may be a mal-
function in the system. Contact any autho-
rized Lexus retailer or Lexus authorized

Enabling/Disabling the Dynamic
Radar Cruise Control with Road
Sign Assist (if equipped)

260

4-5. Using the driving support systems

repairer, or any reliable repairer.

■

Automatic cancelation of constant

speed control mode

Constant speed control mode is automati-

cally canceled in the following situations:

●

Actual vehicle speed is more than

approximately 16 km/h (10 mph) below

the set vehicle speed.

●

Actual vehicle speed falls below approxi-

mately 30 km/h (20 mph).

●

VSC is activated.

●

TRC is activated for a period of time.

●

When the VSC or TRC system is turned

off.

●

When the brake control or output

restriction control of a driving support

system operates. (For example: Pre-Col-

lision System, Drive-Start Control)

●

The parking brake is operated.

If constant speed control mode is automati-
cally canceled for any reasons other than
the above, there may be a malfunction in
the system. Contact any authorized Lexus
retailer or Lexus authorized repairer, or any
reliable repairer.

■

The Dynamic Radar Cruise Control

with Road Sign Assist may not operate

properly when

As the Dynamic Radar Cruise Control with

Road Sign Assist may not operate properly

in conditions in which RSA may not operate

or detect correctly (



P.249), when using

this function, make sure to check the speed

limit sign displayed.
In the following situations, the set speed

may not be changed to the recognized

speed limit by pressing and holding the

“+RES”/“-SET” switch.

●

If speed limit information is not available

●

When the recognized speed limit is the

same as the set speed

●

When the recognized speed limit is out-

side of the speed range that the dynamic

radar cruise control system can operate

■

Situations in which the curve speed

reduction function may not operate

In situations such as the following, the curve

speed reduction function may not operate:

●

When the vehicle is being driven around

a gentle curve.

●

When the accelerator pedal is being

depressed.

●

When the vehicle is being driven around

an extremely short curve.

■

Brake operation

A brake operation sound may be heard and

the brake pedal response may change, but

these are not malfunctions.

■

Warning messages and buzzers for

dynamic radar cruise control with full-

speed range

Warning messages and buzzers are used to

indicate a system malfunction or to inform

the driver of the need for caution while driv-

ing. If a warning message is shown on the

multi-information display, read the message

and follow the instructions. (



P.223, 413)

■

When the sensor may not be correctly

detecting the vehicle ahead

In the case of the following and depending

on the conditions, operate the brake pedal

when deceleration of the system is insuffi-

cient or operate the accelerator pedal

when acceleration is required.
As the sensor may not be able to correctly

detect these types of vehicles, the approach

warning (



P.256) may not be activated.

●

Vehicles that cut in suddenly

●

Vehicles traveling at low speeds

●

Vehicles that are not moving in the same

lane

●

Vehicles with small rear ends (trailers

with no load on board, etc.)

261

4-5. Using the driving support systems

ivin
g

●

Motorcycles traveling in the same lane

●

When water or snow thrown up by the

surrounding vehicles hinders the detect-

ing of the sensor

●

When your vehicle is pointing upwards

(caused by a heavy load in the luggage

compartment, etc.)

●

Preceding vehicle has an extremely high

ground clearance

■

Conditions under which the vehicle-to-

vehicle distance control mode may not

function correctly

In the case of the following conditions,

operate the brake pedal (or accelerator

pedal, depending on the situation) as nec-

essary.
As the sensor may not be able to correctly

detect vehicles ahead, the system may not

operate properly.

●

When the road curves or when the lanes

are narrow

●

When steering wheel operation or your

position in the lane is unstable

●

When the vehicle ahead of you deceler-

ates suddenly

●

When driving on a road surrounded by a

structure, such as in a tunnel or on a

bridge

●

While the vehicle speed is decreasing to

the set speed after the vehicle acceler-

ates by depressing the accelerator pedal

■

Situations in which the curve speed

reduction function may not operate

properly

In situations such as the following, the curve

speed reduction function may not operate

properly:

●

When the vehicle is being driven around

a curve on an incline/decline

●

When the course of the vehicle differs

from the shape of the curve

●

When the vehicle speed is excessively

high when entering a curve

●

When the steering wheel is suddenly

operated

Lexus ES (2023 year). Manual in english - page 16