Lexus NX (2023 year). Manual in english

●

When the vehicle is traveling at a low speed
and the brake pedal is not depressed, or is
depressed late

●

When the accelerator pedal is depressed ex-
cessively

●

When the moves forward due to the incorrect
shift position being selected

Moving Vehicles Rear of the Vehicle

If a rear radar sensor detects a vehicle approaching from the right or left at the rear
of the vehicle and the system determines that the possibility of a collision is high,

* :

If equipped

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Driving suppor

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ystem

this function will perform brake control to reduce the likelihood of an impact with
the approaching vehicle.

INFORMATION

■

The system will operate when

The function will operate when the driving assist infomation indicator is not illuminated or
flashing and all of the following conditions are met:

●

Engine output restriction control

•

PKSB (Parking Support Brake) system is enabled.

•

The vehicle speed is 15 km/h (9 mph) or less.

•

Vehicles are approaching from the right or left at the rear of the vehicle at a
traveling speed of approximately 8 km/h (5 mph) or more.

•

The shift position is in R.

•

The PKSB (Parking Support Brake) determines that a stronger than normal brake
operation is necessary to avoid a collision with an approaching vehicle.

●

Brake control

•

Engine output restriction control is operating.

•

The PKSB (Parking Support Brake) determines that an emergency brake operation
is necessary to avoid a collision with an approaching vehicle.

■

The system will stop operating when

The function will stop operating if any of the following conditions are met:

●

Engine output restriction control

•

PKSB (Parking Support Brake) system is disabled.

•

The collision becomes avoidable with normal brake operation.

•

A vehicle is no longer approaching from the right or left at the rear of the vehicle.

●

Brake control

•

PKSB (Parking Support Brake) system is disabled.

•

Approximately 2 seconds have elapsed since the vehicle was stopped by brake
control.

•

The brake pedal is depressed after the vehicle is stopped by brake control.

•

A vehicle is no longer approaching from the right or left at the rear of the vehicle.

■

Detection range

The detection range of the system differs from the detection area of the RCTA function.

→

P.391

Therefore, even if the RCTA function detects a vehicle and provides an alert, the

PKSB (Parking Support Brake) system may not start operating.

6-2. Using the safe driving support functions

406

■

RCTA buzzer

Regardless of whether the RCTA function is on or off, if the PKSB (Parking Support
Brake) system is not disabled, when the brake control operates, the buzzer will sound to
alert the driver.

■

Situations in which the system may not operate properly

→

P.386

■

Situations in which the system may operate even if there is no possibility of a
collision

→

P.386

Examples of the Moving Vehicles Rear of the Vehicle operation

This function will operate in situations such as the following if a vehicle is detected
in the traveling direction of the vehicle.

■

When reversing, a vehicle is approaching and the brake pedal is not de-
pressed, or is depressed late

Moving Vehicles Rear of the Vehicle sensors

→

P.365

WARNING

■

To ensure the system can operate properly

→

P.365

Pedestrians Rear of the Vehicle

If the rear camera sensor detects a pedestrian behind the vehicle while backing
up and the system determines that the possibility of colliding with the detected
pedestrian is high, a buzzer will sound. If the system determines that the possibility

* :

If equipped

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of colliding with the detected pedestrian is extremely high, the brakes will be
applied automatically to help reduce the impact of the collision.

INFORMATION

■

The system will operate when

●

The function will operate when the driving assist infomation indicator is not illuminated
or flashing and all of the following conditions are met:

•

Engine output restriction control

•

PKSB (Parking Support Brake) system is enabled.

•

The vehicle speed is approximately 15 km/h (9 mph) or less.

•

The shift position is in R.

•

The rear camera sensor detects a pedestrian behind the vehicle while backing
up and the system determines that the possibility of colliding with the detected
pedestrian is high.

•

The PKSB (Parking Support Brake) determines that a stronger-than-normal brake
operation is necessary to avoid a collision.

●

Brake control

•

Engine output restriction control is operating.

•

The PKSB (Parking Support Brake) determines that an emergency brake operation
is necessary to avoid a collision with a pedestrians.

■

The system will stop operating when

The function will stop operating if any of the following conditions are met:

●

Engine output restriction control

•

PKSB (Parking Support Brake) system is disabled.

•

The collision becomes avoidable with normal brake operation.

•

The pedestrian is no longer detected behind your vehicle.

●

Brake control

•

PKSB (Parking Support Brake) system is disabled.

•

Approximately 2 seconds have elapsed since the vehicle was stopped by brake
control.

•

The brake pedal is depressed after the vehicle is stopped by brake control.

●

The pedestrian is no longer detected behind your vehicle.

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■

Detection range

The detection area of the system differs from the detection area of the RCD function.

→

P.396

Therefore, even if the RCD function detects a pedestrian and provides an alert,

the PKSB (Parking Support Brake) may not start operating.

■

Situations in which the system may not operate properly

→

P.393

■

Situations in which the system may operate unexpectedly

→

P.393

When a vehicle is detected behind the vehicle

When a pedestrian is detected behind the vehicle while backing up, the brake
pedal is not depressed or is depressed late.

Pedestrians Rear of the Vehicle display

Displays a message to urge the driver to take evasive action when a pedestrian
is detected in the detection area behind the vehicle. (A message will also be
displayed on the center display.)

Pedestrian detection icon

Brake reminder

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ystem

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.
The RSA system detects specific road signs using the front camera and warns the
driver via displays and buzzers.

WARNING

■

For safe use

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.316

■

Situations in which the system may not operate properly

●

Situations in which the sensors may not operate properly:

→

P.321

Displays on the display

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.

When the front camera detects a sign, 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

■

Display function operating conditions

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:

* :

If equipped

6-2. Using the safe driving support functions

410

●

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

●

When the system determines that a sign is no longer valid

●

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

■

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 vehicle is driven in a country with a different direction of traffic

●

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.

■

Customize settings

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

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 multi-information display, the sign display will be emphasized
and a buzzer will sound.

6-2. Using the safe driving support functions

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ystem

●

When the RSA system detects a no-entry sign and determines that the vehicle
has entered the no-entry area based on the map information of the navigation
system, the no-entry sign displayed on the multi-information display will flash
and a buzzer will sound. (Vehicles with a navigation 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 road signs

(1)

Speed limit begins/Maximum speed zone begins

Speed limit ends/Maximum speed zone ends

(1)

is displayed when neither speed limit road signs nor speed limit related

information is available.

▶

Speed limit related information

(1)(2)

Motorway

Motorway exit

Expressway

Expressway exit

Urban area beginning

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412

Urban area ending

Residential area beginning

Residential area ending

Residential area beginning

Residential area ending

(1)

Displayed when a sign is detected but speed limit information for the road is not

available from the navigation system.

(2)

is displayed when neither speed limit road signs nor speed limit related

information is available.

▶

No overtaking road signs

No overtaking begins

No overtaking ends

▶

Other road signs

No-entry

(1)

End of prohibition

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Stop

Warning

(1)

For vehicles with a navigation system

▶

Speed limit with supplemental mark

(1)

Wet

Rain

Ice

Supplemental mark exists

(2)

Exit ramp on right

(3)

Exit ramp on left

(3)

Time

(1)

Displayed simultaneously with a speed limit sign.

(2)

Content not recognized.

(3)

If the turn signal indicators are not operated when changing lanes, this mark will not

be displayed.

●

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

Duplicate display example

6-2. Using the safe driving support functions

414

Dynamic radar cruise control

This dynamic radar cruise control uses radar to detect the presence of vehicles
ahead, determines the current vehicle-to-vehicle distance, and operates to main-
tain 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.420

●

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.

●

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.

●

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.321

●

Situations in which the lane may not be detected:

→

P.316

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:

Vehicles without a head-up display: 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.
Vehicles with a head-up display: If a preceding vehicle stops, the vehicle will also stop
(controlled stop). After the preceding vehicle starts off, pressing the [ + ] 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 lever is in D.
The shift position is in D.

●

The desired set speed can be set when the vehicle speed is approximately 30 km/h
(20 mph) or more.
(If the vehicle speed is set while driving at below approximately 30 km/h [20 mph],
the set speed will be set to approximately 30 km/h [20 mph].)

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■

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.

■

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

●

Vehicles without a head-up display: When the [+RES] switch is pressed while the
vehicle is stopped by system control, if the preceding vehicle starts off within approxi-
mately 3 seconds, follow-up cruising will resume.
Vehicles with a head-up display: 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

●

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

→

P.323

■

Dynamic radar cruise control system warning messages and buzzers

For safe use:

→

P.316

■

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.425)

may not operate.

●

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

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●

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

■

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

[+RES] switch

[ - ] switch

Cancel switch

Vehicle-to-vehicle distance switch

6-2. Using the safe driving support functions

420

▶

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 on the head-up display. If
the head-up display is off, the functions will be
displayed 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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Driving suppor

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ystem

Using the accelerator pedal, accelerate or
decelerate to the desired vehicle speed (ap-
proximately 30 km/h [20 mph] 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

●

Vehicles without a head-up display: To change the set vehicle speed, press the
[+RES]or [ - ] switch until the desired speed is displayed.Vehicles with a head-up
display: To change the set vehicle speed, press the[ + ] or [ - ] switch until the
desired speed is displayed.

▶

Vehicles without a head-up display:

▶

Vehicles without a head-up

display

▶

Vehicles with a head display

6-2. Using the safe driving support functions

422

▶

Vehicles with a head-up display:

Increase set vehicle speed

Decrease set vehicle speed

Short press adjustment (IN DISPUTE): Press the switch
Press and hold adjustment (IN DISPUTE): Press and hold the switch until the desired
set vehicle speed is reached.

The set vehicle speed will increase or decrease as follows:

Short press adjustment (IN DISPUTE): By 1 km/h (0.6 mph) or 1 mph (1.6
km/h) each time the switch is pressed
Press and hold adjustment (IN DISPUTE): Increases or decreases in 5 km/h
(3.1 mph) or 5 mph (8 km/h) increments continuously while the switch is
pressed and held

The set vehicle speed adjustment increment can be changed through a customize
setting.

■

Increasing the set vehicle speed using the accelerator pedal

Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.

Vehicles without a head-up display: Press the [+RES] switch.Vehicles with a
head-up display: Press the[ + ] switch.

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Driving suppor

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ystem

Canceling/resuming control

Press the cancel switch or driving assist
switch to cancel control.

Control will also be canceled if the brake pedal is
depressed.
(If the vehicle has been stopped by system con-
trol, depressing the brake pedal will not cancel
control.)

Vehicles without a head-up display: Press the [+RES] switch to resume con-
trol.Vehicles with a head-up display: Press the [RES] switch to resume control.

Changing the vehicle-to-vehicle distance

●

Each time the switch is pressed, the vehicle-to-
vehicle distance setting will change as follows:

If a preceding vehicle is detected, the preceding
vehicle mark will be displayed.

Illustra-
tion
Number

Vehicle-to-
vehicle dis-
tance

Approximate Distance
(Vehicle Speed: 100
km/h [60 mph])

Long

Approximately 60 m
(200 ft)

Medium
(Long)

Approximately 45 m
(145 ft)

Medium
(Short)

Approximately 30 m
(100 ft)

Short

Approximately 25 m (85
ft)

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

▶

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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The actual vehicle-to-vehicle distance varies in accordance with the vehicle speed. Also,
when the vehicle is stopped by system control, it will be stopped at a certain distance from
the preceding vehicle, depending on the situation, regardless of the setting.

Approach warning

In situations where the vehicle approaches a preceding vehicle and the system
cannot provide sufficient deceleration, such as if a vehicle cuts in front of the
vehicle, a warning display will flash and a buzzer will sound to alert the driver.
Depress the brake pedal to ensure appropriate vehicle-to-vehicle distance.

■

Warnings may not occur when

In the following situations, the warning may not operate even though the vehicle-
to-vehicle distance is short.

●

When the preceding vehicle is traveling at the same speed or faster than your
vehicle

●

When the preceding vehicle is traveling at an extremely low speed

●

Immediately after the vehicle speed has been set

●

When the accelerator pedal is depressed

Curve speed reduction function

When a curve is detected, the vehicle speed will
begin being reduced. When the curve ends, the
vehicle speed reduction will end.

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

INFORMATION

■

Situations in which the curve speed reduction function may not operate

In situations such as the following, the curve speed reduction function may not operate:

●

When the vehicle is being driven around a gentle curve

●

When the accelerator pedal is being depressed

●

When the vehicle is being driven around an extremely short curve

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■

Changing the settings of the curve speed reduction function

Various settings of the curve speed reduction function can be changed through custom-
ize settings.

(

→

P.661)

Overtaking prevention function

If a detected vehicle in the passing lane is traveling slower than your vehicle,
overtaking will be suppressed.

The overtaking prevention function will not operate if the passing lane is congested or
vehicles are traveling at low speeds. This function is not available for vehicles without a
DCM.

Support for lane change

If your vehicle is being driven at approximately 80 km/h (50 mph) or more and
a lane change to the passing lane is performed, when the turn signal lever is
operated and the lane is changed, the vehicle will accelerate up to the set speed to
assist in overtaking.

For vehicles with a DCM: The system’s recognition of which lane is the passing lane is
determined by location information and the driving condition of surrounding vehicles. The
support for lane change function and overtaking prevention function may not operate if it is
difficult to obtain location information or there are few surrounding vehicles.
For vehicles without a DCM: The system’s recognition of which lane is the passing lane
may be based solely on the location of the steering wheel in the vehicle (left-hand drive/
right-hand drive). If the vehicle is driven in a location where the passing lane is on the
opposite side of that where the vehicle was originally sold, the vehicle may accelerate
when the turn signal lever is operated away from the passing lane. (e.g. The vehicle was
manufactured for a right-hand traffic location, but is being driven in a left-hand traffic
location. The vehicle may accelerate when the turn signal lever is operated to the right.)
If your vehicle is being driven at approximately 80 km/h (50 mph) or more and the lane is
changed to that with a vehicle traveling slower than your vehicle, when the turn signal lever
is operated the vehicle will gradually decelerate to assist in changing lanes.

Dynamic Radar Cruise Control with Road Sign Assist

Vehicles without a head-up display: When RSA function is enabled and the dynam-
ic radar cruise control system is operating, if a speed limit sign is detected, the
detected speed limit will be displayed with an up/down arrow. The set speed can
be increased/reduced to the detected speed limit by pressing and holding the
[+RES] switch or [ - ] switch.

* :

If equipped

6-2. Using the safe driving support functions

426

Vehicles with a head-up display: When RSA function is enabled and the dynamic
radar cruise control system is operating, if a speed limit sign is detected, the
detected speed limit will be displayed with an up/down arrow. The set speed can
be increased/reduced to the detected speed limit by pressing and holding the [+]
switch or [ - ] switch.

■

When the set speed is lower than the detected speed limit

▶

Vehicles without a head-up display

Press and hold the [+RES] switch.

▶

Vehicles with a head-up display:

Press and hold the [ + ] switch.

■

When the set speed is higher than the detected speed limit

Press and hold the [ - ] switch.

■

Enabling/disabling the dynamic radar cruise control with road sign assist

The dynamic radar cruise control with road sign assist can be enabled/disabled
through a customize setting.

(

→

P.661)

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

427

Driving suppor

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ystem

INFORMATION

■

The dynamic radar cruise control with road sign assist may not operate properly
when

As the dynamic radar cruise control with road sign assist may not operate properly in
situations where the RSA may not operate or cannot detect signs correctly

(

→

P.410)

when using this function, make sure to confirm the actual speed limit.
Vehicles without a head-up display: In the following situations, the set speed may not
change to the detected speed limit by pressing and holding the [+RES] switch or [ - ]
switch:
Vehicles with a head-up display: In the following situations, the set speed may not change
to the detected speed limit by pressing and holding the [ + ] switch or [ - ] switch:

●

When speed limit information is not available

●

When the detected speed limit is the same as the set speed

●

When the detected speed limit is outside of the speed range which the dynamic radar
cruise control system can operate

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Cruise Control

Cruise control

The vehicle can be driven at a set speed even if the accelerator pedal is not
depressed.
Use the cruise control only on highways and expressways

WARNING

■

For safe use

●

Driving safely is solely the responsibility of the driver. Therefore, do not overly rely
on this system. The driver is solely responsible for paying attention to the vehicle’s
surroundings and driving safely.

●

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.

■

Situations in which cruise control should not be used

Do not use the 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.

●

On roads with sharp bends

●

On winding roads

●

On slippery roads, such as those covered with rain, ice or snow

●

On steep downhills, or where there are sudden changes between sharp up and down
gradients
Vehicle speed may exceed the set speed when driving down a steep hill.

●

When it is necessary to disable the system:

→

P.316

System Components

■

Meter display

Set vehicle speed

Cruise control indicator

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429

Driving suppor

t s

ystem

■

Switches

▶

Vehicles without a head-up display:

Driving assist mode select switch

Driving assist switch

[+RES]switch

[ - ]switch

Cancel switch

▶

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 on the head-up display. If
the head-up display is off, the functions will be
displayed on the multi-information display.

Driving assist mode select switch

Driving assist switch

[RES]switch

[ + ]switch

[ - ]switch

Cancel switch

Using the cruise control

Setting the vehicle speed

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

The cruise control indicator will illuminate.

▶

Vehicles without a head-up

display

6-2. Using the safe driving support functions

430

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

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

●

Vehicles without a head-up display: To change the set vehicle speed, press the
[+RES] or [ - ] switch until the desired speed is displayed.Vehicles with a head-up
display: To change the set vehicle speed, press the [ + ] or [ - ] switch until the
desired speed is displayed.

▶

Vehicles without a head-up display

▶

Vehicles with a head-up dis-

play

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

431

Driving suppor

t s

ystem

▶

Vehicles with a head-up display

Increase set vehicle speed

Decrease set vehicle speed

The set vehicle speed will increase or decrease as follows:

Fine adjustment: By 1 km/h (0.6 mph) or 1 mph (1.6 km/h) each time the switch
is pressed
Large adjustment: Increases continuously while the switch is pressed and held

■

Increasing the set vehicle speed using the accelerator pedal

Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.

Vehicles without a head-up display: Press the [+RES] switch. Vehicles with a
head-up display: Press the [ + ]switch

Canceling/resuming control

Press the cancel switch or driving assist
switch to cancel control.

Control will also be canceled if the brake pedal is
depressed.

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

432

Vehicles without a head-up display: Press the [+RES] switch to resume con-
trol.Vehicles with a head-up display: Press the [RES] switch to resume control.

Automatic cancellation of the cruise control

In the following situations, the cruise control will be canceled automatically:

●

When the vehicle speed drops approximately 16 km/h (10 mph) or more
below the set vehicle speed

●

When the vehicle speed drops below approximately 30 km/h (20 mph)

●

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

●

When the parking brake has been operated

●

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

→

P.323

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433

Driving suppor

t s

ystem

Emergency Driving Stop System

The emergency driving stop system is a system which automatically decelerates
and stops the vehicle within its lane if the driver becomes unable to continue
driving the vehicle, such as if they have suffered a medical emergency, etc.
During LTA (Lane Tracing Assist) control, if the system does not detect driving
operations, such as if the driver is not holding the steering wheel, and determines
the driver is not responsive, the vehicle will be decelerated and stopped within its
current lane to help avoid a collision or reduce the impact of a collision.

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. The emergency driving stop
system is designed to provide support in an emergency where it is difficult for the
driver to continue driving, such as if they have had a medical emergency. It is not
designed to support driving while drowsy or in poor physical health, or inattentive
driving.

●

Although the emergency driving stop system is designed to decelerate the vehicle
within its lane to help avoid or help reduce the impact of a collision if the system
determines that it is difficult for the driver to continue driving, its effectiveness may
change according to various conditions. Therefore, it may not always be able to
achieve the same level of performance. Also, if the operating conditions are not met,
this function will not operate.

●

After the emergency driving stop system operates, if driving becomes possible again,
immediately begin driving again or, if necessary, park the vehicle on the shoulder of
the road and set a warning reflector and flare to warn other drivers of your stopped
vehicle.

●

After this system operates, passengers should attend to the driver as necessary and
take appropriate hazard prevention measures, such as moving to a place where safety
can be ensured, such as the shoulder of the road or behind a guardrail.

●

This system detects the condition of the driver through the operation of the steering
wheel. This system may operate if the driver is aware but intentionally and continuously
does not operate the vehicle. Also, the system may not operate if it cannot determine
that the driver is not responsive, such as if they are leaning on the steering wheel.

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Summary of the system

Operation of this system is separated into 4 control states. Through control state
"warning phase 1" and "warning phase 2", the system determines if the driver
is aware and responsive while outputting a warning and controlling the vehicle
speed. If the system determines the driver is not responsive, it will operate in
control state "deceleration stop phase" and "stop hold phase" and decelerate and
stop the vehicle. It will then operate continuously in "stop hold phase".

INFORMATION

■

Operating conditions

This system operates when all of the following conditions are met:

●

When the LTA is on

●

When the vehicle speed is approximately 30 mph (50 km/h) or more

■

Operation cancelation conditions

In the following situations, system operation will be canceled:

●

When LTA control has been canceled (the LTA switch has been pressed, etc.)

●

When the dynamic radar cruise control has been canceled

●

When driver operations are detected (the steering wheel is held, the brake pedal,
accelerator pedal, parking brake, hazard light switch, or turn signal lever is operated)

●

When the driving assist switch is pressed while in the stop and hold phase

●

When the engine switch has been turned from ON to OFF

●

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

→

P.323

■

LTA control when operation is canceled

When emergency driving stop system operation is canceled, LTA control may also be
canceled.

Warning phase 1

If driving operations are not detected after the hands off steering wheel warning
operates, a buzzer will sound intermittently and a message will be displayed to
warn the driver, and the system will judge if the driver is responsive or not. If driving
operations, such as holding the steering wheel, are not performed within a certain
amount of time, the system will enter warning phase 2.

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Driving suppor

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ystem

Warning phase 2

After entering warning phase 2, a buzzer will sound in short intervals and a
message will be displayed to warn the driver, and the vehicle will slowly decelerate
to approximately 50 km/h (30 mph).
If driving operations, such as holding the steering wheel, are not performed within
a certain amount of time, the system will determine that the driver is not responsive
and enter the deceleration stop phase.

The audio system will be muted until the driver becomes responsive.
When the vehicle is decelerating, the brake lights may illuminate, depending on the road
conditions, etc.
After the vehicle has decelerated a certain amount, the emergency flashers (hazard lights)
will flash.

Deceleration stop phase

After the driver is judged as being not responsive, a buzzer will sound continuously
and a message will be displayed to warn the driver, and the vehicle will slowly
decelerate and stop. While the vehicle is decelerating, the emergency flashers
(hazard lights) will flash to warn other drivers of the emergency.

Stop hold phase

After the vehicle is stopped, the parking brake will be applied automatically. After
entering the stop and hold phase, the buzzer will continue sounding continuously,
the emergency flashers (hazard lights) will flash to warn other drivers of the
emergency, and the doors will unlock.

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436

Lexus NX (2023 year). Manual in english - page 13