Lexus NX350 (2022 year). Manual in english - page 27

▶

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

6-2. Using the safe driving support functions

448

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

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

Adjusting the set vehicle speed

■

Adjusting the set vehicle speed using the switches

●

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 display:

▶

Vehicles without a head-up

display

▶

Vehicles with a head display

6-2. Using the safe driving support functions

449

Driving suppor

t s

ystem

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:

●

For U.S.A.

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

●

Except for U.S.A.

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

■

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.
(If the vehicle has been stopped by system control,
depressing the brake pedal will not cancel con-
trol.)

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.

▶

Vehicles without a head-up

display

6-2. Using the safe driving support functions

450

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: 60 mph
[100 km/h])

Long

Approximately 200 ft
(60 m)

Medium
(Long)

Approximately 145 ft (45
m)

Medium
(Short)

Approximately 100 ft
(30 m)

Short

Approximately 85 ft (25
m)

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

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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

451

Driving suppor

t s

ystem

●

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

■

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.714)

Support for lane change

If your vehicle is being driven at approximately 50 mph (80 km/h) 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.

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.)

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452

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.

6-2. Using the safe driving support functions

453

Driving suppor

t s

ystem

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.349

System Components

■

Meter display

Set vehicle speed

Cruise control indicator

6-2. Using the safe driving support functions

454

■

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

455

Driving suppor

t s

ystem

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

456

▶

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 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

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

457

Driving suppor

t s

ystem

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.356

6-2. Using the safe driving support functions

458

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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459

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 engine switch has been turned from ON to OFF

●

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

→

P.356

■

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

460

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

461

Driving suppor

t s

ystem

Engine 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 engine 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 engine output to be restrained.

6-2. Using the safe driving support functions

462

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 engine output may be restrained.

●

When the shift lever is shifted to R

●

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

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