Lexus NX350h (2022 year). Manual in english — page 30

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.341

System Components

■

Meter display

A

Set vehicle speed

B

Cruise control indicator

6-2. Using the safe driving support functions

494

■

Switches

▶

Vehicles without a head-up display:

A

Driving assist mode select switch

B

Driving assist switch

C

[+RES]switch

D

[ - ]switch

E

Cancel switch

▶

Vehicles with a head-up display:

A

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.

B

Driving assist mode select switch

C

Driving assist switch

D

[RES]switch

E

[ + ]switch

F

[ - ]switch

G

Cancel switch

Using the cruise control

Setting the vehicle speed

1

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

495

6

Driving suppor

t s

ystem

2

Using the accelerator pedal, accelerate to
the desired vehicle speed (approximately 20
mph [30 km/h] 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

496

▶

Vehicles with a head-up display

1

Increase set vehicle speed

2

Decrease set vehicle speed

The set vehicle speed will increase or decrease as follows:

Fine adjustment: By or 1 mph (1.6 km/h) or 1 km/h (0.6 mph) 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

1

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

2

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

Canceling/resuming control

1

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

497

6

Driving suppor

t s

ystem

2

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

●

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

●

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.348

6-2. Using the safe driving support functions

498

Emergency Driving Stop System

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.

6-2. Using the safe driving support functions

499

6

Driving suppor

t s

ystem

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 50 km/h (30 mph) 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 power switch has been turned from ON to OFF

●

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

→

P.348

■

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.

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 30 mph (50 km/h).

6-2. Using the safe driving support functions

500

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.

Deceleration stop phase

After entering the deceleration stop phase, a buzzer will sound continuously and a
message will be displayed to warn the driver, and the vehicle will slowly decelerate
and stop. After the vehicle stops, the system will enter the stop and hold phase.

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
and the emergency flashers (hazard lights) will flash to warn other drivers of the
emergency.

6-2. Using the safe driving support functions

501

6

Driving suppor

t s

ystem

Hybrid system output restriction when the accelerator pedal and brake
pedal are depressed at the same time

Purpose of the brake override system

If the accelerator pedal and brake pedal are depressed at the same time, the brake
override system may operate and restrain the hybrid system output. A warning
message is displayed on the multi-information display while the system is operating.

WARNING

To avoid depressing the wrong pedal, become familiar with the location of the brake
pedal and accelerator pedal before driving the vehicle.
If the accelerator pedal is mistaken for the brake pedal and depressed, the vehicle may
suddenly start off.

NOTICE

Do not depress the accelerator pedal and brake pedal at the same time while driving, as
this may cause the hybrid system output to be restrained.

6-2. Using the safe driving support functions

502

Sudden start restraint control

Sudden start restraint control (Drive-Start Control [DSC])

When the following unusual operation is performed with the accelerator pedal
depressed, the hybrid system output may be restrained.

●

When the shift lever is shifted to R

1

●

When the shift lever is shifted from P or R to forward drive shift positon such as
D

1

When the system operates, a message appears on the multi-information display.
Read the message and follow the instruction.
A warning light comes on while the system is operating.

INFORMATION

■

Drive-Start Control (DSC)

When the TRAC is turned off, sudden start restraint control also does not operate.

If your vehicle have trouble escaping from the mud or fresh snow due to sudden start
restraint control operation, deactivate TRAC so that the vehicle may become able to
escape from the mud or fresh snow.
Also, sudden start restraint control will not operate in the following conditions:

●

When Trail Mode is turned on

Related Links

Driving assist systems(P. 349)

*1 :

Depending on the situation, the shift position may not be changed.

6-2. Using the safe driving support functions

503

6

Driving suppor

t s

ystem

Reducing impact to the occupants in a collision

Reducing impact to passengers in a collision

Seat belt pretensioners

When the vehicle is subjected to a severe frontal or side impact or rollover, the
pretensioners retract the seat belts of the front seats and rear outer seats to
securely restrain the occupants.

The pretensioners will not operate in minor frontal or side impacts, or rear impacts.

INFORMATION

■

Replacing the belt after the pretensioner has been activated

If the vehicle is involved in multiple collisions, the pretensioner will activate for the first
collision, but will not activate for the second or subsequent collisions.

■

PCS-linked control

If the PCS (Pre-Collision System) determines that the possibility of a collision with a
vehicle is high, the seat belt pretensioners will be prepared to operate.

WARNING

■

Seat belt pretensioners

Observe the following precautions to reduce the risk of injury in the event of sudden
braking or an accident. Failure to do so may result in death or serious injury.

●

Do not place anything, such as a cushion, on the front passenger’s seat.
Doing so will disperse the passenger’s weight, which prevents the sensor from detect-
ing the passenger’s weight properly. As a result, the seat belt pretensioner for the front
passenger’s seat may not operate in the event of a collision.

●

If a pretensioner has operated, the SRS warning light will illuminate.
In this situation, the seat belt cannot be used and must be replaced by your Lexus
dealer.

6-3. Reducing impact to the occupants in a collision

504

SRS airbags

The SRS airbags deploy when the vehicle is subjected to certain types of severe
impact that may cause significant injury to the occupants. The airbags work togeth-
er with the seat belts to help reduce the risk of death or serious injury.

A

SRS driver airbag/front passenger airbag

Help reduce impact to the head and chest of the driver and front passenger

B

SRS knee airbags

Help reduce impact to the driver and front passenger

C

SRS seat cushion airbags

●

Helps reduce impact to the front passenger

●

Help restrain the occupant of a rear seat

D

SRS side airbags

●

Help reduce impact to the chest of the occupants of the front seats

E

SRS curtain shield airbags

●

Help reduce impact to the heads of the occupants of the front and rear outer seats

●

Can help prevent the occupants from being thrown from the vehicle in the event of
vehicle rollover

Your vehicle is equipped with ADVANCED AIRBAGS designed based on US
motor vehicle safety standards (FMVSS209). The airbag sensor assembly (ECU)
controls airbag deployment based on information obtained from the sensors, etc.,

6-3. Reducing impact to the occupants in a collision

505

6

Driving suppor

t s

ystem

shown in the system components diagram above. This information includes crash
severity and occupant information. As the airbags deploy, a chemical reaction in
the inflators quickly fills the airbags with non-toxic gas to help restrain the motion of
the occupants.

INFORMATION

■

If the SRS airbags deploy (inflate)

●

Slight abrasions, burns, bruising, etc., may be sustained from SRS airbags, due to the
extremely high speed of deployment (inflation) by hot gases.

●

A loud noise and white powder will be emitted.

●

Parts of the airbag module (steering wheel hub, airbag cover and inflator) as well as
the parts around the airbags may be hot for several minutes. The airbag itself may also
be hot.

●

The windshield may crack.

●

The hybrid system will be stopped and fuel supply to the engine will be stopped.

●

All of the doors will be unlocked.

●

The brakes and stop lights will be controlled automatically.

●

The interior lights will turn on automatically.

●

The emergency flashers will turn on automatically.

●

Fuel supply to the engine will be stopped.

●

For Safety Connect subscribers, if any of the following situations occur, the system is
designed to send an emergency call to the response center, notifying them of the vehi-
cle's location (without needing to push the [SOS] button) and an agent will attempt to
speak with the occupants to ascertain the level of emergency and assistance required.
If the occupants are unable to communicate, the agent automatically treats the call as
an emergency and helps to dispatch the necessary emergency services.

•

When an SRS airbag has been deployed

•

When a seat belt pretensioner has operated

•

When the vehicle has been involved in a severe rear-end collision

■

The SRS airbags deploy in a frontal impact when

●

The following SRS airbags will deploy in the event of an impact that exceeds a
threshold level (level of force corresponding to an approximately 12 - 18 mph [20 - 30
km/h] frontal collision with a fixed wall that does not move or deform):

•

SRS front airbags

•

SRS seat cushion airbags

•

SRS knee airbags

6-3. Reducing impact to the occupants in a collision

506

●

The threshold level at which the SRS airbags will deploy will be higher than normal in
the in the following situations:

•

When the vehicle collides with an object, such as a parked vehicle or sign pole,
which moves or deforms on impact
If the vehicle is involved in an underride collision, such as a collision in which the
front of the vehicle “underrides”, or goes under, the bed of a truck

●

Depending on the type of collision, only the following may deploy:

•

Seat belt pretensioners

●

The SRS airbags for the front passenger's seat will not deploy if there is no passenger
in the front passenger seat. However, the SRS airbags for the front passenger's seat
may deploy, even if the seat is unoccupied, if luggage is put on the seat.

●

The SRS seat cushion airbag for the front passenger’s seat will not deploy if the seat
belt of the front passenger’s seat is unfastened.

●

In the event of an especially severe frontal collision, the left and right SRS curtain shield
airbags may also deploy.

■

The SRS airbags deploy in a side impact when

●

The following SRS airbags will deploy in the event of an impact that exceeds the
set threshold level (level of force corresponding to the impact force produced by an
approximately 3300 lb. [1500 kg] vehicle colliding with the passenger compartment
at a perpendicular angle at an approximate speed of 12 - 18 mph [20 - 30 km/h]):

•

SRS side airbags

•

SRS curtain shield airbags

●

In the event of a side collision, regardless of the impacted side, both the left and right
SRS curtain shield airbags will deploy.

●

If the vehicle is involved in a rollover, the following SRS airbags will deploy:

•

Both left and right SRS curtain shield airbags

■

The SRS airbags deploy in an underside impact when

●

The following airbags may deploy if the underside
of the vehicle collides with a hard object:

•

SRS front airbags

•

SRS knee airbags

•

SRS seat cushion airbags

•

SRS side airbags

•

SRS curtain shield airbags

6-3. Reducing impact to the occupants in a collision

507

6

Driving suppor

t s

ystem

●

The following airbags may deploy if the vehicle
becomes significantly tilted or is strongly impacted
by skidding into a curb, etc.:

•

SRS curtain shield airbags

■

The SRS side airbags will not deploy when

●

The following SRS airbags will not normally de-
ploy in side or rear collisions, vehicle rollovers,
or low speed frontal collisions. However, if such a
collision causes sufficient sudden deceleration, the
SRS airbags may deploy.

•

SRS front airbags

•

SRS knee airbags

•

SRS seat cushion airbags

●

The following SRS airbags may not deploy if the
vehicle is collided with at a certain angle or in a
side collision where an area of the vehicle other
than the passenger compartment is collided with:

•

SRS side airbags

•

SRS curtain shield airbags

●

The following SRS airbags will not normally deploy
in front or rear collisions, vehicle rollovers, or low
speed side collisions:

•

SRS side airbags

●

The following SRS airbags will not normally deploy
in rear collisions, end over end vehicle rollovers, or
low speed front or side collisions:

•

SRS curtain shield airbags

6-3. Reducing impact to the occupants in a collision

508

■

When to contact your Lexus dealer

In the following situations, the vehicle will require inspection and/or repair. Contact your
Lexus dealer as soon as possible.

●

When any of the SRS airbags have been deployed

●

When the front of the vehicle is damaged or de-
formed, or was involved in a collision that was not
severe enough to cause any of the following SRS
airbags to deploy:

•

SRS front airbags

•

SRS knee airbags

•

SRS seat cushion airbags

●

When a door or its surrounding area is damaged,
deformed or has had a hole made in it, or was in-
volved in a collision that was not severe enough to
cause any of the following SRS airbags to deploy:

•

SRS side airbags

•

SRS curtain shield airbags

●

When the pad section of the steering wheel, the dashboard near the front passenger
SRS airbag or the lower side of the instrument panel is scratched, cracked, or other-
wise damaged.

●

When the seat cushion surface is scratched, cracked, or otherwise damaged.

●

When the surface of a seat with an SRS side airbag is scratched, cracked, or otherwise
damaged.

●

When the part of a front pillar, rear pillar or roof side rail garnish (padding) which
covers a SRS curtain shield airbag is scratched, cracked, or otherwise damaged.

WARNING

■

SRS airbag precautions

Observe the following precautions. Failure to do so may result in death or serious injury.

●

The driver and all passengers must wear their seat belts correctly.
The SRS airbags are supplemental devices to be used with the seat belts.

●

The SRS driver airbag deploys with considerable force, and can cause death or
serious injury, especially if the driver is very close to the airbag. The National Highway
Traffic Safety Administration (NHTSA) advises:
Since the risk zone for the driver’s airbag is the first 2 - 3 in. (50 - 75 mm) of inflation,
placing yourself 10 in. (250 mm) from your driver airbag provides you with a clear

6-3. Reducing impact to the occupants in a collision

509

6

Driving suppor

t s

ystem