Lexus NX250 (2024 year). Manual in english

Lexus Safety System + 3

Lexus Safety System + 3 consists of the driving assist systems and contributes to a
safe and comfortable driving experience.

WARNING

■

Lexus Safety System + 3

Lexus Safety System + 3 operates under the assumption that the driver will drive safely,
and is designed to help reduce the impact to the occupants in a collision and assist the
driver under normal driving conditions.
As there is a limit to the degree of recognition accuracy and control performance that
this system can provide, do not overly rely on this system. The driver is solely responsible
for paying attention to the vehicle’s surroundings and driving safely.

■

For safe use

●

Do not overly rely on this system. The driver is solely responsible for paying attention
to the vehicle’s surroundings and driving safely. This system may not operate in all
situations and provided assistance is limited. Over-reliance on this system to drive the
vehicle safely may lead to an accident resulting in death or serious injury.

●

Do not attempt to test the operation of the system, as it may not operate properly,
possibly leading to an accident.

●

If attention is necessary while performing driving operations or a system malfunction
occurs, a warning message or warning buzzer will be operated. If a warning message
is displayed on the display, follow the instructions displayed.

●

Depending on external noise, the volume of the audio system, etc. it may be difficult to
hear the warning buzzer. Also, depending on the road conditions, it may be difficult to
recognize the operation of the system.

■

When it is necessary to disable the system

In the following situations, make sure to disable the system.
Failure to do so may lead to the system not operating properly, possibly leading to an
accident resulting in death or serious injury.

●

When the vehicle is tilted due to being overloaded or having a flat tire

●

When driving at extremely high speeds

●

When towing another vehicle

●

When the vehicle is being transported by a truck, ship, train, etc.

●

When the vehicle is raised on a lift and the tires are allowed to rotate freely

●

When inspecting the vehicle using a drum tester such as a chassis dynamometer or
speedometer tester, or when using an on vehicle wheel balancer

●

When the vehicle is driven in a sporty manner or off-road

6-1. Features of the safe driving support functions

344

WARNING

●

When using an automatic car wash

●

When a sensor is misaligned or deformed due to a strong impact being applied to the
sensor or the area around the sensor

●

When accessories which obstruct a sensor or light are temporarily installed to the
vehicle

●

When a compact spare tire or tire chains are installed to the vehicle or an emergency
tire puncture repair kit has been used

●

When the tires are excessively worn or the inflation pressure of the tires is low

●

When tires other than the manufacturer specified size are installed

●

When the vehicle cannot be driven stably, due to a collision, malfunction, etc.

■

Driving assist systems

●

AHS (Adaptive High-beam System)

→

P.187

●

AHB (Automatic High Beam)

→

P.191

●

PCS (Pre-Collision System)

→

P.353

●

LTA (Lane Tracing Assist)

→

P.365

●

LCA (Lane Change Assist)

→

P.370

●

LDA (Lane Departure Alert)

→

P.374

●

PDA (Proactive Driving Assist)

→

P.380

●

FCTA (Front cross traffic alert)

→

P.386

●

RSA (Road Sign Assist)

→

P.389

●

Dynamic radar cruise control

* :

If equipped

6-1. Features of the safe driving support functions

345

Driving suppor

t s

ystem

→

P.393

●

Cruise Control

→

P.405

●

Emergency Driving Stop System

→

P.411

Sensors used by Lexus Safety System +3

Various sensors are used to obtain the necessary information for system operation.

■

Sensors which detect the surrounding conditions

Front radar sensor

Front camera

Front side radar sensors

Rear side radar sensors

WARNING

■

To prevent malfunction of the radar sensors

Observe the following precautions. Failure to do so may lead to a radar sensor not
operating properly, possibly leading to an accident resulting in death or serious injury.

●

Keep the radar sensors and radar sensor covers clean at all times.
Clean the front of a radar sensor or the front or back of a radar sensor cover if it is
dirty or covered with water droplets, snow, etc.
When cleaning the radar sensor and radar sensor cover, use a soft cloth to remove dirt
so as to not damage them.

Radar sensor

Radar sensor cover

●

Vehicles with front side radar sensors: Keep the surrounding area of the front side
radar sensors on the front bumper clean at all times.

* :

If equipped

6-1. Features of the safe driving support functions

346

WARNING

●

Do not attach accessories, stickers (including transparent stickers), aluminum tape,
etc. to a radar sensor or radar sensor cover and their surrounding area.

●

Do not subject a radar sensor or its surrounding area to impact.
If a radar sensor, the front grille, or front bumper has been subjected to a impact, have
the vehicle inspected by your Lexus dealer.

●

Do not disassemble the radar sensors.

●

Do not modify or paint the radar sensors or radar sensor cover, or replace them with
anything other than Lexus genuine parts.

●

In the following situations, recalibration of the radar sensors will be necessary.
Contact your Lexus dealer for details.

•

When a radar sensor is removed and installed, or replaced

•

When the front bumper or the front grille has been replaced

■

To prevent malfunction of the front camera

Observe the following precautions. Failure to do so may lead to the front camera not
operating properly, possibly leading to an accident resulting in death or serious injury.

●

Always keep the windshield clean.

•

If the windshield is dirty or covered with an oily film, water droplets, snow, etc., clean
the windshield.

•

Even if a glass coating agent is applied to the windshield, it will still be necessary
to use the windshield wipers to remove water droplets, etc. from the area of the
windshield in front of the front camera.

•

If the inner side of the windshield where the front camera is installed is dirty, contact
your Lexus dealer.

●

Do not attach stickers (including transparent stickers) or other items to the area of the
windshield in front of the front camera (shaded area in the illustration).

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347

Driving suppor

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ystem

WARNING

Approximately 1.6 in. (4cm)

●

If the part of the windshield in front of the front camera is fogged up or covered with
condensation or ice, use the windshield defogger to remove the fog, condensation, or
ice.

●

If water droplets cannot be properly removed from the area of the windshield in front
of the front camera by the windshield wipers, replace the wiper insert or wiper blade.

●

Do not attach window tint to the windshield.

●

Replace the windshield if it is damaged or cracked.
If the windshield has been replaced, recalibration of the front camera will be necessa-
ry.
Contact your Lexus dealer for details.

●

Do not allow liquids to contact the front camera.

●

Do not allow bright lights to shine into the front camera.

●

Do not damage the lens of the front camera or allow it to become dirty.
When cleaning the inside of the windshield, do not allow glass cleaner to contact the
lens of the front camera. Do not touch the lens of the front camera.
If the lens of the front camera is dirty or damaged, contact your Lexus dealer.

●

Do not subject the front camera to a strong impact.

●

Do not change the position or orientation of the front camera or remove it.

●

Do not disassemble the front camera.

●

Do not modify any parts around the front camera, such as the inside rear view mirror
or ceiling.

●

Do not attach accessories which may obstruct the front camera to the hood, front
grille, or front bumper.
Contact your Lexus dealer for details.

●

If a surfboard or other long object is to be mounted on the roof, make sure that it will
not obstruct the front camera.

●

Do not modify or change the headlights and other lights.

6-1. Features of the safe driving support functions

348

WARNING

■

Front camera installation area on the windshield

If the system determines that the windshield may be fogged up, it will automatically
operate the heater to defog the part of the windshield around the front camera. When
cleaning, etc., be careful not to touch the area around the front camera until the wind-
shield has cooled sufficiently, as touching it may cause burns.

INFORMATION

■

Situations in which the sensors may not operate properly

●

When the height or inclination of the vehicle has been changed due to modifications

●

When the windshield is dirty, fogged up, cracked or damaged

●

When the ambient temperature is high or low

●

When mud, water, snow, dead insects, foreign matter, etc., is attached to the front of
the sensor

●

When in inclement weather such as heavy rain, fog, snow, or a sandstorm

●

When water, snow, dust, etc. is thrown up in front of the vehicle, or when driving
through mist or smoke

●

When the headlights are not illuminated while driving in the dark, such as at night or
when in a tunnel

●

When the lens of a headlight is dirty and illumination is weak

●

When the headlights are misaligned

●

When a headlight is malfunctioning

●

When a the headlights of another vehicle, sunlight, or reflected light shines directly
into the front camera

●

When the brightness of the surrounding area changes suddenly

●

When driving near a TV tower, broadcasting station, electric power plant, radar
equipped vehicles, etc., or other location where strong radio waves or electrical noise
may be present

●

When a wiper blade is blocking the front camera

●

When in a location or near objects which strongly reflect radio waves, such as the
following:

•

Tunnels

•

Truss bridges

•

Gravel roads

•

Rutted, snow-covered roads

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349

Driving suppor

t s

ystem

•

Walls

•

Large trucks

•

Manhole covers

•

Guardrail

•

Metal plates

●

When near a step or protrusion

●

When a detectable vehicle is narrow, such as a small mobility vehicle

●

When a detectable vehicle has a small front or rear end, such as an unloaded truck

●

When a detectable vehicle has a low front or rear
end, such as a low bed trailer

●

When a detectable vehicle has extremely high
ground clearance

●

When a detectable vehicle is carrying a load which protrudes from its cargo area

●

When a detectable vehicle has little exposed metal, such as a vehicle which is partially
covered with cloth, etc.

●

When a detectable vehicle is irregularly shaped, such as a tractor, sidecar, etc.

●

When the distance between the vehicle and a detectable vehicle has become ex-
tremely short

●

When a detectable vehicle is at an angle

●

When snow, mud, etc. is attached to a detectable vehicle

●

When driving on the following kinds of roads:

•

Roads with sharp curves or winding roads

•

Roads with changes in grade, such as sudden inclines or declines

•

Roads which is sloped to the left or right

•

Roads with deep ruts

6-1. Features of the safe driving support functions

350

•

Roads which are rough and unmaintained

•

Roads which frequently undulate or are bumpy

●

When the steering wheel is being operated frequently or suddenly

●

When the vehicle is not in a constant position within a lane

●

When parts related to this system, the brakes, etc. are extremely hot or cold, wet, etc.

●

When the wheels are misaligned

●

When driving on slick road surfaces, such as when it is covered with ice, snow, gravel,
etc.

●

When the course of the vehicle differs from the shape of a curve

●

When the vehicle speed is excessively high when entering a curve

●

When entering/exiting a parking lot, garage, car elevator, etc.

●

When driving in a parking lot

●

When driving through an area where there are obstructions which may contact your
vehicle, such as tall grass, tree branches, a curtain, etc.

●

When driving in strong wind

■

Situations in which the lane may not be detected

●

When the lane is extremely wide or narrow

●

Immediately after changing lanes or passing through an intersection

●

When driving in a temporary lane or lane regulated by construction

●

When there are structures, patterns, shadows which are similar to lane lines in the
surrounding

●

When there are multiple white lines for a lane line

●

When the lane lines are not clear or driving on a wet road surface

●

When a lane line is on a curb

●

When driving on a bright, reflective road surface, such as concrete

■

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

●

When a malfunction is detected in this system or a related system, such as the brakes,
steering, etc.

●

When the VSC, TRAC, or other safety related system is operating

●

When the VSC, TRAC, or other safety related system is off

■

Changes in brake operation sound and pedal response

●

When the brakes have been operated, brake operation sounds may be heard and the
brake pedal response may change, but this does not indicate a malfunction.

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351

Driving suppor

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ystem

Using the safe driving support functions

Pre-Collision System

PCS (Pre-Collision System)

The pre-collision system uses sensors to detect objects (

→

P.353) in the path of

the vehicle. When the system determines that the possibility of a frontal collision
with a detectable object is high, a warning operates to urge the driver to take
evasive action and the potential brake pressure is increased to help the driver avoid
the collision. If the system determines that the possibility of a collision is extremely
high, the brakes are automatically applied to help avoid the collision or help reduce
the impact of the collision.

The pre-collision system can be disabled/enabled and the warning timing can be changed.
(

→

P.364)

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. Never use the pre-collision
system in place of normal braking operations. This system cannot help avoid or reduce
the impact of a collision in every situation. Over-reliance on this system to drive the
vehicle safely may lead to an accident resulting in death or serious injury.

●

Although the pre-collision system is designed to help avoid or help reduce the impact
of a collision, its effectiveness may change according to various conditions. Therefore,
it may not always be able to achieve the same level of performance. Read the following
items carefully. Do not overly rely on this system and always drive carefully.

•

For safe use:

→

P.344

■

When to disable the pre-collision system

●

When it is necessary to disable the system:

→

P.344

Detectable objects

The system can detect the following as detectable objects. (Detectable objects
differ depending on the function.)

●

Vehicles

●

Bicycles

●

Pedestrians

●

Motorcycles

●

Walls

*1 :

Detected as a detectable object only when being ridden.

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353

Driving suppor

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ystem

System functions

■

Pre-collision warning

When the system determines that the possibility
of a collision is high, a buzzer will sound and an
icon and warning message will be displayed on
the multi-information display to urge the driver to
take evasive action.
If the detectable object is a vehicle, moderate
braking will be performed with the warning.
If the system determines that the accelerator
pedal is strongly depressed, the following icon
and message will be displayed on the multi-infor-
mation display.

■

Pre-collision brake assist

If the system determines that the possibility of a collision is high and the brake
operation by the driver is insufficient, the braking power will be increased.

■

Pre-collision brake control

If the system determines that the possibility of a collision is extremely high, the
brakes are automatically applied to help avoid the collision or reduce the impact of
the collision.

■

Emergency steering assist

If the system determines that the following con-
ditions are met, assistance will be provided to
help enhance vehicle stability and prevent lane
departure. During assistance, in addition to the
pre-collision warning, the following icon will be
displayed on the multi-information display.

●

The possibility of a collision is high

●

There is sufficient space within the lane to perform evasive steering maneuvers

●

The driver is operating the steering wheel

Vehicles with active steering function: The brakes and steering are controlled to
help avoid a collision or reduce the impact of a collision, regardless of the evasive
steering maneuvers performed by the driver.

6-2. Using the safe driving support functions

354

During assistance, the pre-collision warning will operate and a message will be
displayed to warn the driver.

■

Intersection collision avoidance support (left/right turn)

In situations such as the following, if the system determines that the possibility of
a collision is high, the pre-collision warning and pre-collision braking will operate.
Depending on the intersection, assistance may not operate correctly.

●

When turning left/right at an intersection and
crossing the path of an oncoming vehicle

●

When turning left/right and a pedestrian or bi-
cycle is detected

■

Intersection collision avoidance support (crossing vehicles)

At an intersection, etc., if the system determines
that the possibility of a collision with an ap-
proaching vehicle or motorcycle is high, the
pre-collision warning and pre-collision braking
will operate. Depending on the intersection, as-
sistance may not operate correctly.

■

Acceleration Suppression at Low Speed

When driving at a low speed, if the accelerator
pedal is strongly depressed and the system de-
termines that there is a possibility of a collision,
engine output will be restrained or the brakes will
be applied weakly to restrict acceleration. During
operation, a buzzer will sound and a warning
indicator and message will be displayed on the
multi-information display.

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355

Driving suppor

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ystem

■

Suspension control

When the system determines that the possibility of a collision is high, the Adaptive
Variable Suspension system (

→

P.335) controls the damping force of the shock

absorbers to help maintain an appropriate vehicle posture.

WARNING

■

Pre-collision braking

●

When the pre-collision braking function is operating, a large amount of braking force
will be applied.

●

The pre-collision braking function is not designed to hold the vehicle stopped. If the
vehicle is stopped by pre-collision brake control, the driver should operate the brakes
immediately as necessary.

●

The pre-collision braking function may not operate if certain operations are per-
formed by the driver. If the accelerator pedal is being depressed strongly or the
steering wheel is being turned, the system may determine that the driver is taking
evasive action and possibly prevent the pre-collision braking function from operating.

●

If the brake pedal is being depressed, the system may determine that the driver is
taking evasive action and possibly delay the operation timing of the pre-collision brake
control.

■

Acceleration Suppression at Low Speed

If the steering wheel is being turned, the system may determine that the driver is taking
evasive action and possibly prevent the Acceleration Suppression at Low Speed function
from operating or possibly causing its operation to be canceled.

■

Emergency steering assist

●

The emergency steering assist will be canceled when the system determines that lane
departure prevention control has completed.

●

Depending on operations performed by the driver, emergency steering assist may not
operate or operation may be canceled.

•

If the accelerator pedal is depressed strongly, the steering wheel is turned heavily,
the brake pedal is depressed, or the turn signal lever is operated, the system may
determine that the driver is taking evasive action and the emergency steering assist
may not operate.

•

While the emergency steering assist is operating, if the accelerator pedal is
depressed strongly, the steering wheel is turned heavily, or the brake pedal is
depressed, the system may determine that the driver is taking evasive action and
emergency steering assist operation may be canceled.

•

While the emergency steering assist is operating, if the steering wheel is held or
turned in the opposite direction of system operation, emergency steering assist
operation will be canceled.

6-2. Using the safe driving support functions

356

INFORMATION

■

Operating conditions of each function of the pre-collision system

The pre-collision system is enabled and the system determines that the possibility of a
frontal collision with a detected object is high.
However, the system will not operate in the following situations:

●

When the vehicle has not been driven a certain amount after a terminal of the battery
has been disconnected and reconnected

●

When the shift position is in R

●

When the VSC OFF indicator is illuminated (only the pre-collision warning function
will be operational)

The following are the operational speeds and cancelation conditions of each function:

●

Pre-collision warning

Detectable ob-

jects

Vehicle speed

Relative speed between your

vehicle and object

Preceding vehi-
cles, stopped ve-
hicles

Approximately 3 to 110 mph
(5 to 180 km/h)

Approximately 3 to 110 mph (5
to 180 km/h)

Oncoming vehi-
cles

Approximately 20 to 110 mph
(30 to 180 km/h)

Approximately 50 to 130 mph
(80 to 220 km/h)

Bicycles

Approximately 3 to 50 mph
(5 to 80 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Pedestrians

Approximately 3 to 50 mph
(5 to 80 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Preceding motor-
cycles, stopped
motorcycles

Approximately 3 to 110 mph
(5 to 180 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Oncoming motor-
cycles

Approximately 20 to 110 mph
(30 to 180 km/h)

While the pre-collision warning is operating, if the steering wheel is operated heavily
or suddenly, the pre-collision warning may be cancelled.

●

Pre-collision brake assist

6-2. Using the safe driving support functions

357

Driving suppor

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ystem

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding vehi-
cles, stopped
vehicles

Approximately 20 to 110
mph (30 to 180 km/h)

Approximately 7 to 110 mph (10
to 180 km/h)

Bicycles

Approximately 20 to 50
mph (30 to 80 km/h)

Approximately 20 to 50 mph
(30 to 80 km/h)

Pedestrians

Approximately 20 to 50
mph (30 to 80 km/h)

Approximately 20 to 50 mph
(30 to 80 km/h)

Preceding motor-
cycles, stopped
motorcycles

Approximately 20 to 110
mph (30 to 180 km/h)

Approximately 7 to 50 mph (10
to 80 km/h)

●

Pre-collision braking

Detectable ob-

jects

Vehicle speed

Relative speed between your

vehicle and object

Preceding vehi-
cles, stopped ve-
hicles

Approximately 3 to 110 mph
(5 to 180 km/h)

Approximately 3 to 110 mph (5
to 180 km/h)

Oncoming vehi-
cles

Approximately 20 to 110 mph
(30 to 180 km/h)

Approximately 50 to 130 mph
(80 to 220 km/h)

Bicycles

Approximately 3 to 50 mph
(5 to 80 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Pedestrians

Approximately 3 to 50 mph
(5 to 80 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Preceding motor-
cycles, stopped
motorcycles

Approximately 3 to 110 mph
(5 to 180 km/h)

Approximately 3 to 50 mph (5
to 80 km/h)

Oncoming motor-
cycles

Approximately 20 to 110 mph
(30 to 180 km/h)

If either of the following occur while the pre-collision braking function is operating, it
will be canceled:

•

The accelerator pedal is strongly depressed

•

The steering wheel is operated heavily or suddenly

●

Emergency steering assist
The emergency steering assist will not operate when the turn signal lights are flashing.

6-2. Using the safe driving support functions

358

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding vehicles,
stopped vehicles, bicy-
cles, pedestrians, mo-
torcycles

Approximately 25 to 50
mph (40 to 80 km/h)
Active steering function: *
to 50 mph (* to 80 km/h)

Approximately 25 to 50 mph
(40 to 80 km/h)
Active steering function: * to
50 mph (* to 80 km/h)

*Minimum vehicle speed: Vehicle speed at which evasion using pre-collision brake
control is difficult

While the emergency steering assist is operating, if any of the following are performed,
emergency steering assist operation may be cancelled:

•

The accelerator pedal is strongly depressed

•

The steering wheel is operated heavily or suddenly

•

The brake pedal is depressed

●

Intersection collision avoidance support (left/right turn)
The intersection collision avoidance support (for left/right turning vehicles) will not
operate when the turn signal lights are not flashing.

Detectable

objects

Vehicle speed

Oncoming vehi-

cle speed

Relative speed between

your vehicle and object

Oncoming
vehicles

Approximately 3 to 25
mph (5 to 40 km/h)

Approximately
3 to 45 mph (5
to 75 km/h)

Approximately 7 to 70
mph (10 to 115 km/h)

Pedestrians

Approximately 3 to 20
mph (5 to 30 km/h)

Approximately 3 to 25
mph (5 to 40 km/h)

Bicycles

Approximately 3 to 20
mph (5 to 30 km/h)

Approximately 3 to 30
mph (5 to 50 km/h)

Oncoming
motorcycles

Approximately 3 to 25
mph (5 to 40 km/h)

Approximately
3 to 45 mph (5
to 75 km/h)

Approximately 7 to 70
mph (10 to 115 km/h)

●

Intersection collision avoidance support (crossing vehicles)

6-2. Using the safe driving support functions

359

Driving suppor

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ystem

Detectable

objects

Vehicle speed

Crossing vehicle speed

Relative speed be-

tween your vehicle

and object

Vehicles,
Motorcycles
(side)

Approximately 3
to 38 mph (5 to
60 km/h)

●

Your vehicle speed or
less

●

Approximately 25
mph or less (40 km/h
or less)

Approximately 3 to
38 mph (5 to 60
km/h)

●

Acceleration Suppression at Low Speed
The Acceleration Suppression at Low Speed function will not operate when the turn
signal lights are flashing.

Detectable objects

Vehicle speed

Relative speed between your

vehicle and object

Preceding vehicles, stop-
ped vehicles, Pedestrians,
Bicycles, Wall

Approximately 0 to 9
mph (0 to 15 km/h)

Approximately 0 to 9 mph (0
to 15 km/h)

While the Acceleration Suppression at Low Speed function is operating, if any of
the following are performed, the low speed sudden acceleration suppression function
operation will be cancelled:

•

The accelerator pedal is released.

•

The steering wheel is operated heavily or suddenly

■

Detection of detectable objects

Objects are detected based on their size, shape, and
movement. Depending on the ambient brightness,
movement, posture and direction of a detectable ob-
ject, it may not be detected and the system may not
operate properly. The system detects shapes, such as
the following, as detectable objects.

■

Situations in which the system may operate even though the possibility of a collision
is not high

●

In certain situations, such as the following, the system may determine that the possibili-
ty of a collision is high and operate:

•

When passing a detectable object

•

When changing lanes while overtaking a detectable object

•

When suddenly approaching a detectable object

6-2. Using the safe driving support functions

360

•

When approaching a detectable object or other object on the roadside, such as
guardrails, utility poles, trees, walls, etc.

•

When there is a detectable object or other ob-
ject by the roadside at the entrance of a curve

•

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

•

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

•

When passing a detectable object which is
stopped to make a left/right turn

•

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

•

When passing through a location with a struc-
ture above the road (traffic sign, billboard, etc.)

•

When approaching an electric toll gate barrier, parking lot barrier, or other barrier
that opens and closes

•

When turning left/right and an oncoming vehicle, oncoming motorcycle, pedestrian
or bicycle crosses in front of the vehicle

6-2. Using the safe driving support functions

361

Driving suppor

t s

ystem

•

When attempting to turn left/right in front of an oncoming vehicle, oncoming mo-
torcycle, pedestrian or bicycle

•

When turning left/right and an oncoming vehicle, oncoming motorcycle, pedestrian
or bicycle stops or changes course immediately before entering the path of the ve-
hicle

•

When turning left/right and an oncoming vehi-
cle turns left/right in front of the vehicle

•

When the steering wheel is operated toward the path of an oncoming vehicle

•

When there is an object moving above or under
the road

■

Situations in which the system may not operate properly

●

In certain situations, such as the following, a detectable object may not be detected by
the front sensors, and the system may not operate properly:

•

When a detectable object is approaching your vehicle

•

When your vehicle or a detectable object is wandering

•

When a detectable object makes an abrupt maneuver (such as sudden swerving,
acceleration or deceleration)

•

When suddenly approaching a detectable object

•

When the detectable object is near a wall, fence, guardrail, manhole cover, steel
plate on the road surface, or another vehicle

•

When there is a structure above a detectable object

•

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

•

When multiple detectable objects are overlapping

•

When a bright light, such as the sun, is reflecting off of a detectable object

•

When a detectable object is white and looks extremely bright

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•

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

•

When a detectable object cuts in front of or suddenly emerges in front of your vehi-
cle

•

When approaching a vehicle which is diagonal

•

If a bicycle is a child sized bicycle, is carrying a large load, is carrying an extra pas-
senger, is carrying a forward leaning rider, or has an unusual shape (bicycles equip-
ped with a child seat, tandem bicycles, etc.)

•

If a pedestrian or bicycle 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 bicycle is unclear (such as when they are
wearing a raincoat, long skirt, etc.)

•

When a pedestrian is bending forward or squatting

•

When a pedestrian or bicycle 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 or in a tunnel)

•

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

•

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

•

While driving around a curve and a few seconds after driving around a curve

•

When turning left/right and an oncoming vehicle is driving in a lane 3 or more lanes
from the vehicle

•

When turning left/right and the direction of the
vehicle differs greatly from the direction traffic
flows in the oncoming lane

•

When turning left/right, a pedestrian or bicycle
behind the vehicle comes in front of it as if it
overtakes the vehicle

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•

When at an intersection, the approaching crossing vehicle is long in overall length,
such as a large truck, towing trailer, etc.

●

In addition to the preceding, in certain situations, such as the following, the emergency
steering assist may not operate properly:

•

When a detectable object is too close to the vehicle

•

When there is insufficient space to perform evasive steering maneuvers or an
obstruction exists in the evasion direction

•

When there is an oncoming vehicle

●

In addition to the preceding, in certain situations, such as the following, walls may
not be detected as a target object and the Acceleration Suppression at Low Speed
function may not operate properly:

•

When scenery behind the wall is visible, such as a glass door, grid fence, etc.

•

When the wall is slanted or low

•

When the wall is narrow, such as a pole, etc.

•

When the wall is made of plants, such as a hedge, etc.

•

When the road, etc. is reflected on the wall

•

When the vehicle is approaching the wall at an angle

Changing the pre-collision setting

●

The pre-collision system can be enabled/disabled through a customize set-
ting.

→

P.720

The system is enabled each time the engine switch is turned to ON.

●

When the system is disabled, the PCS warning light will illuminate and a mes-
sage will be displayed on the multi-information display.

●

The pre-collision settings can be changed on the customize settings.

→

P.720

●

Vehicles with active steering function: When the pre-collision warning timing is
changed, the emergency steering assist (excluding the active steering function)
timing will also be changed.
When [Later] is selected, the emergency steering assist (excluding the active
steering function) will not operate in most cases.

●

When the dynamic radar cruise control is operating, the pre-collision warning
will operate at the [Earlier] timing, regardless of the user setting.

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Lane Tracing Assist

LTA (Lane Tracing Assist)

LTA functions

●

When driving on a road with clear lane lines
with the dynamic radar cruise control operat-
ing, lane lines and preceding and surrounding
vehicles are detected using the front camera
and radar sensor, and the steering wheel is op-
erated to maintain the vehicle’s lane position.

Use the this function only on highways and express-
ways.
If the dynamic radar cruise control is not operating,
the function will not operate.
In situations where the lane lines are difficult to see
or are not visible, such as when in a traffic jam, sup-
port will be provided using the path of preceding
and surrounding vehicles.
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, the driver will be alert-
ed and this function will be temporarily canceled.
If the steering wheel is firmly gripped, the function will begin operating again.

●

When the function is operating, if the vehicle is
likely to depart from its lane, the driver will be
alerted via a display and buzzer.

When the buzzer sounds, check the area around
the vehicle and carefully operate the steering
wheel to move the vehicle back to the center of the
lane.

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WARNING

■

Before using the LTA system

●

Do not overly rely on the LTA system. The LTA system is not a system which provides
automated assistance in driving and 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.

●

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

●

When not using the LTA system, turn it off using the LTA switch.

INFORMATION

■

Operating conditions of function

●

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

•

The LTA system detects lane lines or the path of preceding or surrounding vehicles.

•

The dynamic radar cruise control is operating.

•

The lane width is approximately 10 to 13 ft. (3 to 4 m).

•

The turn signal lever is not being 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 with a large force.

•

The hands off steering wheel warning(

→

P.367) is not operating.

•

The vehicle is being driven in the center of a lane.

■

Temporary cancelation of functions

●

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

→

P.366)

●

If the operating conditions of a function are no longer met while the function is
operating, a buzzer may sound to indicate that the function has been temporarily
canceled.

●

The steering assist operation of the function can be overridden by the steering wheel
operation of the driver.

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■

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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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

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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.349

●

Situations in which the lane may not be detected:

→

P.351

●

When it is necessary to disable the system:

→

P.344

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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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.371) 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.370) 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.372

●

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

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•

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.721

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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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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.

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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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Lexus NX250 (2024 year). Manual in english - page 11