Lexus NX450H+ (2024 year). Manual in english

■

Lane departure warning function when the LTA is operating

●

Even if the LDA warning method is changed to vibration of the steering wheel, if the
vehicle deviates from the lane while the LTA is operating, the warning buzzer will
sound to alert the driver.

●

If steering wheel operation equivalent to that necessary for a lane change is detected,
the system will determine the vehicle is not deviating from the lane and the warning will
not operate.

■

Hands off steering wheel warning operation

When the system determines the driver is not holding
the steering wheel, a message urging the driver to
grip the steering wheel and the icon shown in the
illustration will be displayed on the multi-information
display to warn the driver. If the system detects that
the steering wheel is held, the warning will be can-
celed. When using the system, make sure to grip
the steering wheel firmly, regardless of whether the
warning is operating or not.

●

If no operations are detected for a certain amount of time, the warning will operate
and the function will be temporarily canceled. This warning may also operate if the
driver only operates steering wheel a small amount continuously.

■

Situations in which the hands off steering wheel warning may not operate properly

●

Depending on the condition of the vehicle, handle control condition and road surface,
the warning function may not operate.
Vehicles with LCA:In the following situations, the system may not be able to detect
when the driver’s hands are off the steering wheel.

•

When a steering wheel cover is installed

•

When the driver is wearing gloves

•

When foreign matter is attached to the steering wheel

•

When the driver is gripping the wood trim, seam of the leather, spokes, or other
part of the steering wheel that does not have sensors

Vehicles with LCA: In the following situations, the hands off steering wheel warning
may not operate and the LTA function may continue operating even though the
driver’s hands are off the steering wheel:

•

When something other than a hand is contacting the steering wheel

•

When a wide object or arms are held across the steering wheel

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ystem

Enabling/disabling the system

The LTA will change between ON/OFF each
time the LTA switch is pressed.

When the LTA is ON, the LTA indicator will illuminate.

WARNING

■

Situations in which the functions may not operate properly

In the following situations, the functions may not operate properly and the vehicle may
depart from its lane. Do not overly rely on these functions. The driver is solely responsible
for paying attention to their surroundings and operating the steering wheel as necessary
to ensure safety.

●

When a preceding or surrounding vehicle
changes lanes (Your vehicle may follow the pre-
ceding or surrounding vehicle and also change
lanes)

●

When a preceding or surrounding vehicle is swaying (Your vehicle may sway accord-
ingly and depart from the lane)

●

When a preceding or surrounding vehicle departs from a lane (Your vehicle may
follow the preceding or surrounding vehicle and also depart from the lane)

●

When a preceding or surrounding vehicle is being driven extremely close to the
left/right lane line (Your vehicle may follow the preceding or surrounding vehicle
accordingly and depart from the lane)

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

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WARNING

●

When there are moving objects or structures in the surrounding area (Depending on
the position of the moving object or structure relative to your vehicle, your vehicle may
sway)

●

When the vehicle is struck by a crosswind or the turbulence of other nearby vehicles

●

Situations in which the sensors may not operate properly:

→

P.389

●

Situations in which the lane may not be detected:

→

P.391

●

When it is necessary to disable the system:

→

P.384

Operation display of steering wheel operation support

The operating state of the LTA system is indicated.

Indicator Lane display Steering icon

Situation

White

Grey / White Grey

LTA is on standby

Green

LTA is operating

Yellow
Flashing

Green

The vehicle is departing the lane toward the
side which the lane display is flashing

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Driving suppor

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ystem

Lane Change Assist

LCA (Lane Change Assist)

LCA functions

This function is linked to the LTA and provides
assistance in performing lane changes through
steering wheel operations.

Use the this function only on highways and express-
ways.
The steering assist operation can be overridden by the
steering wheel operation of the driver.
The lane change assist function is not designed to
operate when changing lanes at a junction.

WARNING

■

Before using the LCA system

●

Do not overly rely on the LCA system.
The LCA system is not a system which provides automated assistance in driving
and it is not a system which reduces the need for checking an adjacent lane for
other vehicles, approaching vehicles, etc. when changing lanes. The driver is solely
responsible for paying attention to their surroundings and operating the steering
wheel as necessary to ensure safety.
Also, do not use the LCA to change lanes into which a lane change should not be
performed (oncoming lanes, road shoulders, etc.).

●

Failure to perform appropriate driving operations and pay careful attention may lead
to an accident.

INFORMATION

■

Operating conditions of function

This function is operable when all of the following conditions are met:

●

The LTA is operating.

* :

If equipped

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●

The lane change assist function is enabled by a customize setting.

●

The vehicle speed is between approximately 55 and 85 mph (90 and 140 km/h).

●

The system detects a broken white line on the side which the lane change is to be
performed.

●

A vehicle is not detected in the lane toward which the turn signal is operated.

●

The steering wheel is not being turned with a large force.

●

The hands off steering wheel warning

(

→

P.411)

is not operating.

■

Cancelation of functions

In the following situations, operation of the LCA may be canceled with the display and
buzzer:

●

When the operating conditions

(

→

P.410)

are no longer met

●

When the system can no longer detect lane lines

●

When the turn signal lever is operated to the second position

→

P.412

●

When the turn signal lever is operated in the opposite direction of the lane change

●

When the system detects operation of the steering wheel, brake pedal or accelerator
pedal by the driver

If the system detects that a vehicle is quickly approaching in the lane toward which the
turn signal is operated a buzzer will sound and a message will be displayed to alert the
driver. At the same time the steering wheel may be slightly operated to help keep the
vehicle away from the approaching vehicle.

■

Hands off steering wheel warning operation

■

Situations in which the hands off steering wheel warning may not operate properly

●

Depending on the condition of the vehicle,handle control condition and road surface,
the warning function may not operate.

●

In the following situations, the system may not be able to detect when the driver’s
hands are off the steering wheel.

•

When a steering wheel cover is installed

•

When the driver is wearing gloves

6-2. Using the safe driving support functions

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Driving suppor

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ystem

•

When foreign matter is attached to the steering wheel

•

When the driver is gripping the wood trim, seam of the leather, spokes, or other
part of the steering wheel that does not have sensors

●

In the following situations, the hands off steering wheel warning may not operate and
the LCA function may continue operating even though the driver’s hands are off the
steering wheel:

•

When something other than a hand is contacting the steering wheel

•

When a wide object or arms are held across the steering wheel

Operating the LCA

If the turn signal lever is held in the first position, the lane change direction will be
displayed and the function will operate.

To change lanes by holding the turn signal lever in the first position without using the LCA,
turn the customize setting of the LCA off.

First position: LCA is operational

Second position: LCA is not operational

WARNING

■

Situations in which the LCA should not be used

●

When driving on a one lane road

●

When there is no broken white line between the current lane and the lane to be
changed to

Enabling/disabling the system

●

LCA can be enabled/disabled through a customize setting.

→

P.793

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Displays and system operation

The operating state of the LCA system is indicated.

LCA display

Steering icon

Condition

Blue arrow and white line

Green

LCA is operating

Grey

Approaching vehicle detected while LCA is
operating

Not displayed

Grey

Lane line no longer detected while LCA is
operating

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Driving suppor

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ystem

Lane Departure Alert

LDA (Lane Departure Alert)

Basic functions

The LDA system 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 deviation

from the lane or course

The front camera is used to detect lane lines or a course

■

Lane departure alert function

When the system determines that the vehicle
might depart from its lane or course

, a warning

is displayed on a display, and either a warning
buzzer will sound or the steering wheel will vi-
brate to alert the driver.

Check the area around your vehicle and carefully
operate the steering wheel to move the vehicle back
to the center of the lane or course

If the system determines that the vehicle may collide
with a vehicle in an adjacent lane, the lane departure
alert will operate even if the turn signals are operating.

*1 :

Boundary between the asphalt and grass, soil, etc., or structures, such as a curb,

guardrail, etc.

6-2. Using the safe driving support functions

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■

Lane departure prevention function

If the system determines that the vehicle is likely
to depart from its lane or course

, it provides

assistance through steering wheel operations to
help avoid deviation from the lane or course.
If the system determines that the steering wheel
has not been operated for a certain amount of
time or the steering wheel is not being firmly
gripped, a warning message may be displayed
and a warning buzzer may sound to alert the
driver.
If the system determines that the vehicle may
collide with a vehicle in an adjacent lane, the lane
departure prevention function will operate even if
the turn signals are operating.

■

Break suggestion function

If the vehicle is swaying, a message will be dis-
played and a buzzer will sound to urge the driver
to take a break.

WARNING

■

Before using the LDA system

●

Do not overly rely on the LDA system. The LDA system is not a system which provides
automated assistance in driving. However, as it is not a system which reduces the
amount of attention necessary for safe driving. The driver is solely responsible for
paying attention to their surroundings and operating the steering wheel as necessary
to ensure safety. Also, the driver is responsible for taking adequate breaks when
fatigued, such as when driving for a long time.

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WARNING

●

Failure to perform appropriate driving operations and pay careful attention may lead
to an accident.

INFORMATION

■

Operating conditions of each function

●

Lane departure alert/prevention function
This function is operable when all of the following conditions are met:

•

The vehicle speed is approximately 30 mph (50 km/h) or more.
Operation may be possible when the vehicle speed is approximately 25 mph (40
km/h) or more if vehicles, motorcycles, bicycles, or pedestrians are detected near
the lane.

•

The system recognizes a lane or course

. (When recognized on only one side, the

system will operate only for the recognized side.)

•

The lane width is approximately 9.8 ft. (3 m) or more.

•

The turn signal lever is not being operated.
(Except when a vehicle is detected in the direction that the turn signal lever is
operated.)

•

The vehicle is not being driven around a sharp curve.

•

The vehicle is not accelerating or decelerating more than a certain amount.

•

The steering wheel is not being turned sufficiently to perform a lane change.

•

When the VSC or TRAC system is not turned off

■

Temporary cancellation of functions

When the operating conditions are no longer met, a function may be temporarily can-
celed. However, when the operation conditions are met again, operation of the function
will automatically be restored.

(

→

P.416)

■

Operation of the lane departure alert function/lane departure prevention function

●

Depending on the vehicle speed, road conditions, lane departure angle, etc., opera-
tion of the lane departure prevention function may not be felt or the function may not
operate.

●

Depending on the conditions, the warning buzzer may operate even if vibration is
selected through a customize setting.

●

If a course

is not clear or straight, the lane departure alert function or lane departure

prevention function may not operate.

*2 :

Boundary between the asphalt and grass, soil, etc., or structures, such as a curb,

guardrail, etc.

6-2. Using the safe driving support functions

416

●

The lane departure alert function or lane departure prevention function may not
operate if the system judges that the vehicle is intentionally being steered to avoid a
pedestrian or parked vehicle.

●

It may not be possible for the system to judge if there is danger of a collision with a
vehicle in an adjacent lane.

●

The steering assist operation of the lane departure prevention function can be overrid-
den by the steering wheel operation of the driver.

■

Hands off steering wheel warning operation

In the following situations, a message urging the driv-
er to operate the steering wheel and an icon will
be displayed and a buzzer will sound to warn the
driver. When using the system, make sure to grip
the steering wheel firmly, regardless of whether the
warning is operating or not.

●

When the system determines that the driver is
not securely holding the steering wheel, or the
steering wheel is not being operated when the steering assist operation of the lane
departure prevention function is operating
The length of time that the warning buzzer operates will become longer as the
frequency of the steering assist operating increases. If the system judges that the
steering wheel has been operated, the warning buzzer will stop.

■

Break suggestion function

This function is operable when all of the following
conditions are met:

●

The vehicle speed is approximately 32 mph (50 km/h) or more.

●

The lane width is approximately 9.8 ft. (3 m) or more.

Depending on the condition of the vehicle and road surface, the break suggestion
function may not operate.

Changing LDA settings

●

The LDA system can be enabled/disabled through a customize setting.

→

P.793

●

The settings of the LDA can be changed on the customize settings.

→

P.793

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Driving suppor

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ystem

WARNING

■

Situations in which the system may not operate properly

In the following situations, the system may not operate properly and the vehicle may
depart from its lane. Do not overly rely on these functions. The driver is solely responsible
for paying attention to their surroundings and operating the steering wheel as necessary
to ensure safety.

●

When the boundary between the asphalt and grass, soil, etc., or structures, such as a
curb, guardrail, etc. is not clear or straight

●

When the vehicle is struck by a crosswind or the turbulence of other nearby vehicles

●

Situations in which the lane may not be detected :

→

P.391

●

Situations in which the sensors may not operate properly:

→

P.389

●

Situations in which some or all of the functions of the system cannot operate:

→

P.391

●

When it is necessary to disable the system:

→

P.384

Displays and system operation

The operating state of the lane departure alert function and steering assist opera-
tion of the lane departure prevention function are indicated.

Indicator

Lane display

Steering icon

Situation

Not illuminated Not illuminated Not illuminated System disabled

White

Grey

Not illuminated

Lane lines are not detected by the
system

White

Not illuminated Lane lines are detected by the system

Yellow
Flashing

Not illuminated

Lane departure alert function is op-
erating for the side which the lane
display is flashing

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Indicator

Lane display

Steering icon

Situation

Green

Lane departure prevention function
is operating for the side which the
lane display is illuminated

Yellow
Flashing

Green

Lane departure alert function/lane
departure prevention function is op-
erating for the side which the lane
display is flashing

6-2. Using the safe driving support functions

419

Driving suppor

t s

ystem

Proactive driving assist

PDA (Proactive Driving Assist)

When a detectable object

(

→

P.420)

is detected, the proactive driving assist op-

erates the brakes and steering wheel to help prevent the vehicle from approaching
too close to the object.

WARNING

■

For safe use

Driving safely is solely the responsibility of the driver.

●

The proactive driving assist is designed to provide some assistance for regular braking
and steering operations, as well as helping to prevent the vehicle from approaching
too close to a detectable object. However, the scope of this assistance is limited.
The driver should perform brake and steering operations as necessary. Read the
following items carefully. Do not overly rely on the proactive driving assist and always
drive carefully.

(

→

P.422)

●

The proactive driving assist is not a system which reduces the amount of attention
necessary for safe driving. Even if the system is operating correctly, the surrounding
conditions as recognized by the driver and detected by the system may differ. It is
necessary for the driver to pay attention, assess risks, and ensure safety. Over-reliance
on this system to drive the vehicle safely may lead to an accident resulting in death or
serious injury.

●

Proactive driving assist is not a system which allows for inattentive driving and is not
a system which assists in poor visibility conditions. The driver is solely responsible for
paying attention to their surroundings and driving safely.

■

When turning proactive driving assist off

●

Situations in which the sensors may not operate properly:

→

P.389

●

When it is necessary to disable the system:

→

P.384

System operating conditions and detectable objects

According to the driving conditions, the operation and detectable objects of the
proactive driving assist will change as follows.

Function

Conditions

Operation

Detectable ob-

jects

Obstacle An-
ticipation As-
sist
(OAA)

A detectable ob-
ject is detected
crossing the road

Assistance with some brake op-
erations is provided in order to
reduce the possibility of a colli-
sion.

●

Pedestrians

●

Bicyclists

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Function

Conditions

Operation

Detectable ob-

jects

Obstacle An-
ticipation As-
sist
(OAA)

A detectable ob-
ject is detected on
the side of the road

Assistance with some brake and
steering wheel operations are
provided according to the sur-
rounding conditions to help pre-
vent the vehicle from approach-
ing too close to a detected ob-
ject.

●

Pedestrians

●

Bicyclists

●

Parked vehi-
cles

Assistance with steering wheel
operations is provided within a
range that the vehicle will not
deviate from its current lane.

Deceleration
Assist
(DA)

A preceding vehi-
cle or an adjacent
vehicle cutting in
front of the vehicle
is detected

The vehicle is gently decelerat-
ed so that the vehicle-to-vehicle
distance will not be excessively
short.

●

Preceding ve-
hicles

●

Motorcycles

A curve is detect-
ed ahead of the ve-
hicle

The vehicle is gently decelerat-
ed if the vehicle speed is deter-
mined to be too high for the
curve ahead.

None

INFORMATION

■

Vehicle speeds at which the system can operate

●

Detectable object crossing the road assistance
Approximately 20 to 35 mph (30 to 60 km/h)

●

Detectable object on the side of the road assistance
Approximately 20 to 35 mph (30 to 60 km/h)

●

Preceding vehicle deceleration assistance
Approximately 15 mph (20 km/h) or more

●

Curve deceleration assistance
Approximately 15 mph (20 km/h) or more

■

System operation will be canceled when

●

In the following situations, system operation will be canceled:

•

When the dynamic radar cruise control or cruise control is operating

•

When the PCS is off

6-2. Using the safe driving support functions

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Driving suppor

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ystem

•

Situations in which some or all of the functions of the system cannot operate:

→

P.391

•

When the P, R or N shift position is selected

●

In the following situations, the brake operation assist will be canceled:

•

Approximately 9 mph (15 km/h) or less

•

When a certain vehicle speed has been reached, as judged by the system, accord-
ing to the surrounding conditions

●

In the following situations, system operation may be canceled:

•

When the brake control or output restriction control of a driving support system
operates
(For example: PCS, drive-start control)

•

When the system determines that a detected object has moved away from the
vehicle

•

When lane lines can no longer be detected

•

When the brake pedal has been depressed

•

When the accelerator pedal has been depressed

•

When the steering wheel has been operated with more than a certain amount of
force

•

When the turn signal lever is operated to the left/right turn position

WARNING

■

Situations in which the system may not operate properly

●

Situations in which the lane may not be detected:

→

P.391

●

When a detectable object stops immediately before entering the path of the vehicle

●

When passing extremely close to a detectable object behind a guardrail, fence, etc.

●

When changing lanes while overtaking a detectable object

●

When passing a detectable object that is changing lanes or turning left/right

●

When there are objects (guardrails, power poles, trees, walls, fences, poles, traffic
cones, mailboxes, etc.) in the surrounding area

●

When there are patterns or a painting ahead of the vehicle that may be mistaken for a
detectable object

●

When passing through a place with a low structure above the road (tunnel with a low
ceiling, traffic sign, signboard, etc.)

●

When driving on snowy, icy, or rutted roads

●

When a detectable object is approaching your vehicle

6-2. Using the safe driving support functions

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WARNING

●

When your vehicle or a detectable object is wandering

●

When the movement of a detectable object changes (change in direction, sudden
acceleration or deceleration, etc.)

●

When suddenly approaching a detectable object

●

When a preceding vehicle or motorcycle is not directly in front of your vehicle

●

When there is a structure above a detectable object

●

When part of a detectable object is hidden by another object (large luggage, umbrel-
la, guardrail, etc.)

●

When multiple detectable objects are overlapping

●

When a bright light, such as the sun or headlights of another vehicle, is reflecting off of
the detectable object

●

When the detectable object is white and looks extremely bright

●

When the color or brightness of the detectable object causes it to blend in with its
surroundings

●

When a detectable object cuts in front of or emerges from beside a vehicle

●

When approaching a vehicle ahead which is perpendicular or at an angle to the
vehicle, or is facing the vehicle

●

If a parked vehicle is perpendicular or at an angle to the vehicle

●

When a bicycle is a child sized bicycle, is carrying a large load, is carrying an extra
passenger, or has an unusual shape (bicycles equipped with a child seat, tandem
bicycles, etc.)

●

When a pedestrian or bicyclist is shorter than approximately 3.2 ft. (1 m) or taller than
approximately 6.5 ft. (2 m)

●

When the silhouette of a pedestrian or bicyclist is unclear (such as when they are
wearing a raincoat, long skirt, etc.)

●

When a pedestrian or bicyclist is bending forward or squatting

●

When a pedestrian or bicyclist is moving at high speed

●

When a pedestrian is pushing a stroller, wheelchair, bicycle or other vehicle

●

When a detectable object blends in with the surrounding area, such as when it is dim
(at dawn or dusk) or dark (at night, in a tunnel, etc.)

●

When the lane width is 13.1 ft. ( 4 m) or more

●

When the lane width is 8.2 ft. (2.5m) or less

●

When the vehicle has not been driven for a certain amount of time after the hybrid
system was started

6-2. Using the safe driving support functions

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Driving suppor

t s

ystem

WARNING

●

While turning left or right or a few seconds after turning left or right

●

While changing lanes or a few seconds after changing lanes

●

When entering a curve, driving around a curve and a few seconds after driving around
a curve

Changing proactive driving assist settings

●

The proactive driving assist can be enabled/disabled through a customize
setting.

→

P.794

●

The following settings of the proactive driving assist can be changed through
customize settings.

→

P.794

System operation display

Depending on the situation, the following indicators or icons will be displayed.
Some icons cannot be displayed unless the display is changed to the driving safety
support function information screen.

Icon

Meaning

●

White: Monitoring for detectable objects

●

Green: Detectable object crossing the road or detectable
object on the side of the road assistance operating

A pedestrian has been detected as crossing the road or on the
side of the road and brake or steering assistance is operating

A vehicle has been detected on the side of the road and brake or
steering operation assistance is being performed

Steering operation assistance is being performed to prevent the
vehicle from approaching too close to a detectable object on the
side of the road

Preceding vehicle deceleration assistance is being performed

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Icon

Meaning

Warning to maintain appropriate vehicle-to-vehicle distance

Curve deceleration assistance is being performed

INFORMATION

■

Hands off steering wheel warning operation

In the following situations, a message urging the driv-
er to grip the steering wheel and the icon shown
in the illustration will be displayed on the display to
warn the driver. If the system detects that the steering
wheel is held, the warning will be canceled. When us-
ing the system, make sure to grip the steering wheel
firmly, regardless of whether the warning is operating
or not.

●

When assistance to a detectable object crossing the road or assistance to a detectable
object on the side of the road is performed and the system determines the driver is not
holding the steering wheel
If no operations are detected for a certain amount of time, a buzzer will sound,
the warning will operate. This warning may also operate if the driver only operates
steering wheel a small amount continuously.

■

Warning operation after preceding vehicle deceleration assistance has ended

After preceding vehicle deceleration assistance has
ended, if the driver does not operate the brake pedal
or accelerator pedal and the vehicle approaches the
preceding vehicle, the display will flash and a buzzer
will sound to urge the driver to decelerate. If the
system determines that the driver is operating the
brake pedal or accelerator pedal, the warning will be
canceled.

6-2. Using the safe driving support functions

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Driving suppor

t s

ystem

Front Cross Traffic Alert

FCTA(Front Cross Traffic Alert)

When approaching an intersection, etc., at a low speed, vehicles approaching from
the left and right of the front of the vehicle can be detected and the driver informed
of these vehicles.

FCTA system control

●

When the system detects a vehicle approach-
ing from the left or right in front of your vehicle
when approaching an intersection, a notifica-
tion will be displayed.

●

When the system determines that your vehicle
may be about to enter an intersection even
though a vehicle is approaching from the left
or right in front of your vehicle, a buzzer will
sound and a message will be displayed to urge
you to depress the brake pedal.

WARNING

■

For safe use

Driving safely is solely the responsibility of the driver. Pay careful attention to the sur-
rounding conditions in order to ensure safe driving. The FCTA system is a supplementary
system that informs the driver of vehicles approaching from the left and right of the
front of the vehicle. Over-reliance on this system may lead to an accident resulting in
death or serious injury. The details of the warning display may differ from the actual
traffic conditions. Although the warning display will stop being displayed after a certain
amount of time, this does not necessarily indicate that there are no longer any vehicles or
pedestrians around your vehicle.

▶

Head-up display

▶

Multi-information display

* :

If equipped

6-2. Using the safe driving support functions

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INFORMATION

■

FCTA system operating conditions

The system will operate when all of the following conditions are met:

●

A shift position other than P or R is selected

●

The vehicle speed is approximately 10 mph (15 km/h) or less

●

A vehicle is approaching from the left or right in front of your vehicle at a speed
between approximately 7 to 37 mph (10 to 60 km/h)

●

There are no vehicles in front of your vehicle

●

The accelerator pedal is not being strongly depressed

●

The brake pedal is not being strongly depressed

■

Situations in which the system may operate even though no vehicles are approach-
ing

In certain situations, such as the following, the system may operate even though no
vehicles are approaching:

●

When approaching objects on the roadside, such as guardrails, traffic signs, utility
poles, street lights, trees, tall grass, walls, etc.

●

When passing an object on the side of the road, such as a parked vehicle

●

When a vehicle or pedestrian is approaching from the left or right in front of your
vehicle in the distance

●

When a vehicle or pedestrian is moving within a parking spot, etc., next to the lane
your vehicle is in

●

When a pedestrian or bicyclist is approaching on a sidewalk

●

When a vehicle or pedestrian is moving away from your vehicle

●

When an approaching vehicle is decelerating or stops

●

When an approaching vehicle makes a left/right turn immediately in front of your
vehicle

●

When a pedestrian is approaching your vehicle

●

When an oncoming vehicle makes a right/left turn

●

When your vehicle enters an intersection before a vehicle approaching from the left or
right in front of your vehicle

●

When stopped at traffic light and a vehicle approaches from the left or right in front of
your vehicle

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ystem

●

When making a left/right turn in front of an ap-
proaching vehicle

●

When an oncoming vehicle approaches and pass-
es

●

When being overtaken by another vehicle

●

When driving next to another vehicle or a pedes-
trian

●

When a vehicle or pedestrian approaches the side of your vehicle

■

Situations in which the system may not operate properly

In situations such as the following, a vehicle may not be detected by a front side radar
sensor and the system may not operate properly:

●

If an approaching vehicle moves suddenly (sudden steering, acceleration, decelera-
tion, etc.)

●

If a vehicle is approaching from the left or right of the front of your vehicle diagonally

●

When a vehicle is approaching from the left or right in front of your vehicle in the
distance

●

When there is an object between your vehicle and an approaching vehicle

●

When several vehicles are approaching with little space between them

●

Situations in which the sensors may not operate properly:

→

P.389

●

Situations in which some or all of the functions of the system cannot operate:

→

P.391

Changing FCTA system settings

●

The FCTA can be enabled/disabled through a customize setting.

→

P.792

●

The following settings of the FCTA can be changed through customize set-
tings.

→

P.792

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Road Sign Assist

RSA (Road Sign Assist)

The RSA system detects specific road signs using the front camera and/or naviga-
tion system (when speed limit information is available) and warns the driver via
displays and buzzers.

WARNING

■

For safe use

●

Driving safely is solely the responsibility of the driver. Pay careful attention to the
surrounding conditions in order to ensure safe driving.

●

Do not rely solely upon the RSA. The RSA assists the driver by providing road sign
information, but it is not a replacement for the driver’s own vision and awareness.
Driving safely is solely the responsibility of the driver. Pay careful attention to the
surrounding conditions in order to ensure safe driving.

■

Situations in which the RSA should not be used

●

When it is necessary to disable the system:

→

P.384

■

Situations in which the system may not operate properly

●

Situations in which the sensors may not operate properly:

→

P.389

Display Function

When the front camera detects a sign or information of a sign is available from the
navigation system, the sign will be displayed on the display.

●

Multiple signs can be displayed.

Depending on the specifications of the vehicle, the number of displayed signs may be
limited.

INFORMATION

■

Operating conditions of sign display

Signs will be displayed when the following conditions are met:

●

The system has detected a sign

In the following situations, a displayed sign may stop being displayed:

●

When a new sign has not been detected for a certain distance

●

When the system determines that the road being driven on has changed, such as after
a left or right turn

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■

Situations in which the display function may not operate properly

In the following situations, the RSA system may not operate properly and may not detect
signs or may display the incorrect sign. However, this does not indicate a malfunction.

●

When a sign is dirty, faded, tilted or bent

●

When the contrast of an electronic sign is low

●

When all or part of a sign is hidden by a tree, utility pole, etc.

●

When a sign is detected by the front camera for a short amount of time

●

When the driving state (turning, changing lanes, etc.) is judged incorrectly

●

When a sign is immediately after a freeway junction or in an adjacent lane just before
merging

●

When stickers are attached to the rear of a preceding vehicle

●

When a sign similar to a system compatible sign is detected as a system compatible
sign

●

When a speed limit sign for a frontage road is within detection range of the front
camera

●

When driving around a roundabout

●

When a sign intended for trucks, etc. is detected

●

When the navigation system map data is out of date

●

When the navigation system cannot be used
In this case, the speed limit signs displayed on the multi-information display and
navigation system display may differ.

Notification function

In the following situations, the RSA system will output a warning to notify the driver.

●

If the vehicle speed exceeds the speed warning threshold of the speed limit sign
displayed on the display, the sign display will be emphasized and a buzzer will
sound.

●

When the RSA system detects a do not enter sign and determines that the
vehicle has entered a no-entry area, the do not enter sign displayed on the
display will flash and a buzzer will sound.

INFORMATION

■

Operating conditions of the notification functions

●

Excess speed notification function
This function will operate when the following condition is met:

•

A speed limit road sign is recognized by the system.

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●

No entry notification function
This function will operate when all of the following conditions are met:

•

More than one no entry road signs are recognized by the system simultaneously.

•

The vehicle is passing between no entry road signs recognized by the system.

Types of road signs supported

●

The following types of road signs can be displayed.

However, non-standard or recently introduced traffic signs may not be displayed.

Speed limit

Do Not Enter

No U-turn

No Turn On Red

Stop

Yield

Warning

●

Depending on the specifications of the vehicle, signs may be displayed overlap-
ping.

Changing RSA settings

The following settings of the RSA can be changed through customize settings.

→

P.794

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Dynamic radar cruise control

This dynamic radar cruise control detects the presence of vehicles ahead, deter-
mines the current vehicle-to-vehicle distance, and operates to maintain a suitable
distance from the vehicle ahead. The desired vehicle-to-vehicle distance can be set
by operating the vehicle-to-vehicle distance switch.
Use the dynamic radar cruise control only on highways and expressways.

WARNING

■

For safe use

●

Driving safely is solely the responsibility of the driver. Do not overly rely on this system,
and pay careful attention to the surrounding conditions in order to ensure safe driving.

●

The dynamic radar cruise control provides driving assistance to reduce the driver’s
burden. However, there are limitations to the assistance provided.
Read the following items carefully. Do not overly rely on this system and always drive
carefully.

•

Conditions under which the system may not operate correctly:

→

P.436

●

Set the speed appropriately according to the speed limit, traffic flow, road conditions,
weather conditions, etc. The driver is responsible for confirming the set speed.

●

Even if the system is operating correctly, the condition of a preceding vehicle as
recognized by the driver and detected by the system may differ. Therefore, it is
necessary for the driver to pay attention, assess risks, and ensure safety. Over-reliance
on this system to drive the vehicle safely may lead to an accident resulting in death or
serious injury.

■

Precautions for the driving assist systems

Observe the following precautions, as there are limitations to the assistance provided by
the system. Over-reliance on this system may lead to an accident resulting in death or
serious injury.

●

Details of support provided for the driver’s vision
The dynamic radar cruise control is only intended to help the driver in determining
the distance between the driver’s own vehicle and a designated preceding vehicle. It is
not a system which allows for careless or inattentive driving, and is not a system which
assists in poor visibility conditions.
The driver must pay attention to their surroundings, even when the vehicle stops.

●

Details of support provided for the driver’s judgement

6-2. Using the safe driving support functions

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WARNING

The dynamic radar cruise control determines whether the distance between the
driver’s own vehicle and a designated preceding vehicle 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.

●

Details of support provided for the driver’s operation
The dynamic radar cruise control 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 safety.

■

Situations in which the dynamic radar cruise control should not be used

Do not use the dynamic radar cruise control in the following situations. As the system will
not be able to provide appropriate control, using it may lead to an accident resulting in
death or serious injury.

●

Roads where there are pedestrians, cyclists, etc.

●

When driving on a highway or expressway entrance or exit

●

When the approach warning sounds frequently

●

Situations in which the sensors may not operate properly:

→

P.389

●

Situations in which the lane may not be detected:

→

P.384

Basic functions

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Constant speed cruising:

When there are no vehicles ahead
The vehicle drives at the speed set by the driver.
If the set vehicle speed is exceeded while driving down a hill, the set vehicle speed
display will blink and a buzzer will sound.

Deceleration and follow-up cruising

When a preceding vehicle driving slower than the set vehicle speed is detected
When a vehicle is detected driving ahead of your vehicle, the vehicle automatically
decelerates and if a greater reduction in vehicle speed is necessary, the brakes are
applied (the stop lights will come on at this time). The vehicle is controlled to maintain
the vehicle-to-vehicle distance set by the driver, in accordance with changes in the
speed of the preceding vehicle. If vehicle deceleration is not sufficient and the vehicle
approaches the vehicle ahead, the approach warning will sound.

Acceleration

When there are no longer any preceding vehicles driving slower than the set vehicle
speed
The vehicle accelerates until the set vehicle speed is reached and then resumes
constant speed cruising.

Starting off:

If a preceding vehicle stops, the vehicle will also stop (controlled stop). After the
preceding vehicle starts off, pressing the [ RES ] switch or depressing the accelerator
pedal will resume follow-up cruising (start off operation). If a start off operation is not
performed, the controlled stop will continue.

INFORMATION

■

Operating conditions

●

The shift position is in D.

●

The desired set speed can be set when the vehicle speed is approximately 20 mph
(30 km/h) or more.

•

If the vehicle speed is set while driving at below approximately 20 mph (30 km/h),
the set speed will be set to approximately 20 mph (30 km/h).

•

If the vehicle speed is set while driving at a speed that exceeds the system's upper
limit, the set vehicle speed will be the system's upper limit.

■

Accelerating after setting the vehicle speed

As with normal driving, acceleration can be performed by depressing the accelerator
pedal. After accelerating, the vehicle will return to the set vehicle speed. However, while
in vehicle-to-vehicle distance control mode, the vehicle speed may decrease to below
the set vehicle speed in order to maintain the distance from the preceding vehicle.

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■

When the vehicle is stopped by system control during follow-up cruising

●

When the [RES] switch is pressed while the vehicle is stopped by system control, if
the preceding vehicle starts off within approximately 3 seconds, follow-up cruising will
resume.

●

If the preceding vehicle starts off within approximately 3 seconds of the vehicle being
stopped by system control, follow-up cruising will resume.

■

Automatic cancellation of vehicle-to-vehicle distance control mode

In the following situations, vehicle-to-vehicle distance control mode will be canceled
automatically:

●

When the brake control or output restriction control of a driving support system
operates (For example: Pre-Collision System, drive-start control)

●

When the parking brake has been operated

●

When the vehicle is stopped by system control on a steep incline

●

When any of the following are detected while the vehicle is stopped by system control:

•

The driver’s seat belt is unfastened

•

The driver’s door is opened

•

Approximately 3 minutes have elapsed since the vehicle was stopped

The parking brake may be actived automatically.

●

Situations in which some or all of the functions of the system cannot operate:

→

P.391

■

Dynamic radar cruise control system warning messages and buzzers

For safe use:

→

P.384

■

Preceding vehicles that the sensor may not detect correctly

In the following situations, depending on the conditions, if the system cannot provide suffi-
cient deceleration or acceleration is necessary, operate the brake pedal or accelerator
pedal.
As the sensor may not be able to correctly detect these types of vehicles, the approach
warning

(

→

P.440)

may not operate.

●

When a vehicle cuts in front of your vehicle or changes lanes away from your vehicle
extremely slowly or quickly

●

When changing lanes

●

When a preceding vehicle is driving at a low speed

●

When a vehicle is stopped in the same lane as the vehicle

●

When a motorcycle is traveling in the same lane as the vehicle

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■

Conditions under which the system may not operate correctly

In the following situations, operate the brake pedal (or accelerator pedal, depending on
the situation) as necessary.
As the sensor may not be able to correctly detect a vehicle, the system may not operate
properly.

●

When a preceding vehicle brakes suddenly

●

When changing lanes at low speeds, such as in a traffic jam

System components

■

Meter display

Multi-information display

Set vehicle speed

Indicators

■

Switches

▶

Vehicles without a head-up display

Driving assist mode select switch

Driving assist switch

[+] switch, [RES] switch

[ - ] switch

Cancel switch

Vehicle-to-vehicle distance switch

6-2. Using the safe driving support functions

436

▶

Vehicles with a head-up display

The function of each switch differs depend-
ing on the conditions and settings.

When a switch is touched, the function of each
switch is displayed. If the head-up display is off,
check functions on the multi-information display.

Driving assist mode select switch

Driving assist switch

[RES] switch

[ + ]switch

[ - ]switch

Vehicle-to-vehicle distance switch

Cancel switch

Using the dynamic radar cruise control

Setting the vehicle speed

Press the driving assist mode select switch to
select dynamic radar cruise control.

The dynamic radar cruise control indicator will il-
luminate.

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

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Using the accelerator pedal, accelerate or
decelerate to the desired vehicle speed (ap-
proximately 20 mph [30 km/h] or more),
and press the driving assist switch to set the
set vehicle speed.

The set vehicle speed will be displayed on the
multi-information display.
The vehicle speed at the moment the switch is re-
leased will be the set vehicle speed.

Adjusting the set vehicle speed

■

Adjusting the set vehicle speed using the switches

●

To change the set vehicle speed, press the [+] switch or [ - ] switch until the
desired speed is displayed.

▶

Vehicles without a head-up display:

▶

Vehicles with a head-up display:

Increase set vehicle speed

▶

Vehicles without a head-up

display

▶

Vehicles with a head display

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Lexus NX450H+ (2024 year). Manual in english - page 13