Lexus RX (2022 year). Manual in english — page 16

272

4-5. Using the driving support systems

●

On an extremely bumpy road, on an

incline, on gravel, or on grass.

●

When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

vehicles or other devices which produce

ultrasonic waves are near the vehicle

●

A sensor is coated with a sheet of spray

or heavy rain.

●

If objects draw too close to the sensor.

●

When a pedestrian is wearing clothing

that does not reflect ultrasonic waves (ex.

skirts with gathers or frills).

●

When objects that are not perpendicular

to the ground, not perpendicular to the

vehicle traveling direction, uneven, or

waving are in the detection range.

●

Strong wind is blowing

●

When driving in inclement weather such

as fog, snow or a sandstorm

●

When an object that cannot be detected

is between the vehicle and a detected

object

●

If an object such as a vehicle, motorcycle,

bicycle or pedestrian cuts in front of the

vehicle or runs out from the side of the

vehicle

●

If the orientation of a sensor has been

changed due to a collision or other

impact

●

When equipment that may obstruct a

sensor is installed, such as a towing eye-

let, bumper protector (an additional trim

strip, etc.), bicycle carrier, or snow plow

●

If the front of the vehicle is raised or low-

ered due to the carried load

●

If the vehicle cannot be driven in a stable

manner, such as when the vehicle has

been in an accident or is malfunctioning

●

When a tire chains, compact spare tire or

an emergency tire puncture repair kit is

used

■

Situations in which the system may

operate even if there is no possibility of a

collision

In some situations, such as the following, the

system may operate even though there is no

possibility of a collision.

●

When driving on a narrow road

●

When driving toward a banner, flag,

low-hanging branch or boom barrier

(such as those used at railroad crossings,

toll gates and parking lots)

●

When there is a rut or hole in the surface

of the road

●

When driving on a metal cover (grating),

such as those used for drainage ditches

●

When driving up or down a steep slope

●

If a sensor is hit by a large amount of

water, such as when driving on a flooded

road

●

There is dirt, snow, water drops or ice on

a sensor. (Cleaning the sensors will

resolve this problem.)

●

A sensor is coated with a sheet of spray

or heavy rain

●

When driving in inclement weather such

as fog, snow or a sandstorm

●

When strong winds are blowing

●

When vehicle horns, vehicle detectors,

motorcycle engines, air brakes of large

vehicles, the clearance sonar of other

vehicles or other devices which produce

ultrasonic waves are near the vehicle

●

If the front of the vehicle is raised or low-

273

4

4-5. Using the driving support systems

Driving

ered due to the carried load

●

If the orientation of a sensor has been

changed due to a collision or other

impact

●

The vehicle is approaching a tall or

curved curb

●

Driving close to columns (H-shaped steel

beams, etc.) in multi-story parking

garages, construction sites, etc.

●

If the vehicle cannot be driven in a stable

manner, such as when the vehicle has

been in an accident or is malfunctioning

●

On an extremely bumpy road, on an

incline, on gravel, or on grass

●

When a tire chains, compact spare tire or

an emergency tire puncture repair kit is

used

■

Detection range of the sensors

Approximately 100 cm (3.3 ft.)
Approximately 150 cm (4.9 ft.)
Approximately 60 cm (2.0 ft.)

The diagram shows the detection range of
the sensors. Note that the sensors cannot
detect objects that are extremely close to
the vehicle.
The range of the sensors may change
depending on the shape of the object, etc.

■

Multi-information display, head-up display (if equipped) and Center Display

When an object is detected by a sensor, the approximate distance to the object will
be displayed on the multi-information display, Center Display, and head-up display
(if equipped). (As the distance to the object becomes short, the distance segments
may blink.)



Approximate distance to object: 150 cm (4.9 ft.) to 60 cm (2.0 ft.)

*

(Rear center

sensor)

Sensor detection display, object
distance

A
B
C

274

4-5. Using the driving support systems

*

: Automatic buzzer mute function is enabled. (



P.275)



Approximate distance to object: 100 cm (3.3 ft.) to 60 cm (2.0 ft.)

*

(Front

center sensor)

*

: Automatic buzzer mute function is enabled. (



P.275)



Approximate distance to object: 60 cm (2.0 ft.) to 45 cm (1.5 ft.)

*

*

: Automatic buzzer mute function is enabled. (



P.275)



Approximate distance to object: 45 cm (1.5 ft.) to 30 cm (1.0 ft.)

*

*

: Automatic buzzer mute function is enabled. (



P.275)



Approximate distance to object: 30 cm (1.0 ft.) to 15 cm (0.5 ft.)

*1

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

275

4

4-5. Using the driving support systems

Driving

*1

: Automatic buzzer mute function is disabled. (



P.275)

*2

: The distance segments will blink slowly.



Approximate distance to object: Less than 15 cm (0.5 ft.)

*1

*1

: Automatic buzzer mute function is disabled. (



P.275)

*2

: The distance segments will blink rapidly.

■

Buzzer operation and distance to
an object

A buzzer sounds when the sensors are
operating.



The buzzer beeps faster as the vehi-
cle approaches an object. When the
vehicle comes within the following
distance of the object, the buzzer
sounds continuously:

Approximately 30 cm (1.0 ft.)



When 2 or more objects are
detected simultaneously, the buzzer
sounds for the nearest object. If one
or more objects come within
approximately 30 cm (1.0 ft.) of the
vehicle, the buzzer will repeat a long
tone, followed by fast beeps.



Automatic buzzer mute function:
After a buzzer begins sounding, if

the distance between the vehicle
and the detected object does not
become shorter, the buzzer will be
muted automatically. (However, if
the distance between the vehicle
and object is 30 cm (1.0 ft.) or less,
this function will not operate.)

The buzzer sounds volume can be
adjusted. (



P.267)

Multi-information display

*2

Center Display

*2

Head-up display

Multi-information display

*2

Center Display

*2

Head-up display

276

4-5. Using the driving support systems

*

: If equipped

Meter control switches

Turning the RCTA function on/off.
When the RCTA function is disabled, the
RCTA OFF indicator illuminates.

Outside rear view mirror indicators

When a vehicle approaching from the right
or left at the rear of the vehicle is detected,
both outside rear view mirror indicators
will flash.

Center Display

If a vehicle approaching from the right or
left at the rear of the vehicle is detected,
the RCTA icon (



P.278) for the detected

side will be displayed on the Center Dis-
play. This illustration shows an example of a
vehicle approaching from both sides of the
vehicle.

RCTA buzzer

If a vehicle approaching from the right or
left at the rear of the vehicle is detected, a
buzzer will sound.

RCTA (Rear crossing traffic
alert) function

*

The RCTA function uses the BSM
rear side radar sensors installed
behind the rear bumper. This func-
tion is intended to assist the driver
in checking areas that are not easily
visible when backing up.

WARNING

■

Cautions regarding the use of the

function

There is a limit to the degree of recogni-

tion accuracy and control performance

that this system can provide, do not

overly rely on this system. The driver is

always responsible for paying attention

to the vehicle’s surroundings and driving

safely. (



P.262)

■

To ensure the system can operate

properly



P.263

System components

A

B

C

D

277

4

4-5. Using the driving support systems

Driving

Use the meter control switches to ena-
ble/disable the RCTA function.
(



P.80)



Vehicles without the Lexus parking
assist-sensor

1

Press

or

to select

.

2

Press

or

to select “RCTA”

and then press

.

When the RCTA function is disabled, the
RCTA OFF indicator (



P.70) illuminates

on the multi-information display. (Each
time the engine switch is turned off then
changed to IGNITION ON mode, the
RCTA function will be enabled automati-
cally.)



Vehicles with the Lexus parking
assist-sensor

1

Press

or

to select

.

2

Press

or

to select “PKSA”

and then press

.

3

Press

or

to select “RCTA”

and then press

.

When the RCTA function is disabled, the

RCTA OFF indicator (



P.70) illuminates

on the multi-information display. (Each
time the engine switch is turned off then
changed to IGNITION ON mode, the
RCTA function will be enabled automati-
cally.)

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

■

Hearing the RCTA buzzer

The RCTA buzzer may be difficult to hear

over loud noises, such as if the audio system

volume is high.

■

When “Rear Cross Traffic Alert Una-

vailable” is shown on the multi-informa-

tion display

Water, ice, snow, mud, etc., may be attached

to the rear bumper around the sensors.

(



P.263) Removing the water, ice, snow,

mud, etc., from the attached to the rear

bumper around the sensors to return the

function to normal.
Additionally, the function may not operate

normally when driving in extremely hot or

cold environments.

■

Rear side radar sensors



P.263

■

Operation of the RCTA function

The RCTA function uses rear side radar sensors to detect vehicles approaching
from the right or left at the rear of the vehicle and alerts the driver of the presence
of such vehicles by flashing the outside rear view mirror indicators and sounding a
buzzer.

Turning the RCTA function
on/off

NOTICE

■

Before using the RCTA function

Do not place objects near the sensors.

RCTA function

278

4-5. Using the driving support systems

Approaching vehicles
Detection areas of approaching vehicles

■

RCTA icon display

When a vehicle approaching from the
right or left at the rear of the vehicle is
detected, the following will be dis-
played on the Center Display.



Example (Lexus parking assist mon-
itor) (if equipped): Vehicles are
approaching from both sides of the
vehicle



Example (Panoramic view monitor)
(if equipped): Vehicles are
approaching from both sides of the
vehicle

■

RCTA function detection areas

The areas that vehicles can be detected in are outlined below.

A
B

279

4

4-5. Using the driving support systems

Driving

The buzzer can alert the driver of
faster vehicles approaching from far-
ther away.
Example:

■

The RCTA function is operational when

The RCTA function operates when all of the

following conditions are met:

●

The engine switch is in IGNITION ON

mode.

●

The RCTA function is on.

●

The shift lever is in R.

●

The vehicle speed is approximately 8

km/h (5 mph) or less.

●

The approaching vehicle speed is

between approximately 8 km/h (5 mph)

and 28 km/h (18 mph).

■

Setting the buzzer volume

The buzzer volume can be adjusted on the

multi-information display. (



P.267)

Use the meter control switches to change

settings. (



P.80)

■

Conditions under which the system will

not detect a vehicle

The RCTA function is not designed to

detect the following types of vehicles and/or

objects:

●

Vehicles approaching from directly

behind

●

Vehicles backing up in a parking space

next to your vehicle

●

Vehicles that the sensors cannot detect

due to obstructions

●

Guardrails, walls, signs, parked vehicles
and similar stationary objects

*

●

Small motorcycles, bicycles, pedestrians,
etc.

*

●

Vehicles moving away from your vehicle

●

Vehicles approaching from the parking
spaces next to your vehicle

*

●

The distance between the sensor and

approaching vehicle gets too close

*

: Depending on the conditions, detection

of a vehicle and/or object may occur.

■

Situations in which the system may not

operate properly

The RCTA function may not detect vehicles

correctly in the following situations:

Approaching vehi-

cle speed

Approximate

alert distance

28 km/h (18 mph)

(fast)

20 m (65 ft.)

8 km/h (5 mph)

(slow)

5.5 m (18 ft.)

A

280

4-5. Using the driving support systems

●

When the sensor is misaligned due to a

strong impact to the sensor or itssur-

rounding area

●

When mud, snow, ice, a sticker, etc., is

covering the sensor or surrounding area

on the position above the rear bumper

●

When driving on a road surface that is

wet with standing water during bad

weather, such as heavy rain, snow, or fog

●

When multiple vehicles are approaching

with only a small gap between each vehi-

cle

●

When a vehicle is approaching at high

speed

●

When equipment that may obstruct a

sensor is installed, such as a towing eye-

let, bumper protector (an additional trim

strip, etc.), bicycle carrier, or snow plow

●

When backing up on a slope with a sharp

change in grade

●

When backing out of a sharp anglepark-

ing spot

●

When towing a trailer

●

When there is a significant difference in

height between your vehicle and the

vehicle that enters the detection area

●

When a sensor or the area around a sen-

sor is extremely hot or cold

●

If the suspension has been modified or

tires of a size other than specified are

installed

●

If the front of the vehicle is raised or low-

ered due to the carried load

●

When turning while backing up

●

When a vehicle turns into the detection

area

■

Situations in which the system may

operate even if there is no possibility of a

collision

Instances of the RCTA function unneces-

sary detecting a vehicle and/or object may

increase in the following situations:

●

When the parking space faces a street

and vehicles are being driven on the

street

281

4

4-5. Using the driving support systems

Driving

●

When the distance between your vehicle

and metal objects, such as a guardrail,

wall, sigh, or parked vehicle, which may

reflect electrical waves toward the rear of

the vehicle, is short

●

When equipment that may obstruct a

sensor is installed, such as a towing eye-

let, bumper protector (an additional trim

strip, etc.), bicycle carrier, or snow plow

●

When a vehicle passes by the side of your

vehicle

●

When a detected vehicle turns while

approaching the vehicle

●

When there are spinning objects near

your vehicle such as the fan of an air con-

ditioning unit

●

When water is splashed or sprayed

toward the rear bumper, such as from a

sprinkler

●

Moving objects (flags, exhaust fumes,

large rain droplets or snowflakes, rain

water on the road surface, etc.)

●

When the distance between your vehicle

and a guardrail, wall, etc., that enters the

detection area is short

●

Gratings and gutters

●

When a sensor or the area around a sen-

sor is extremely hot or cold

●

If the suspension has been modified or

tires of a size other than specified are

installed

●

If the front of the vehicle is raised or low-

ered due to the carried load

282

4-5. Using the driving support systems

*

: If equipped

■

Parking Support Brake function
(static objects) (if equipped)

Ultrasonic sensors are used to detect
static objects, such as a wall, in the
detection area when driving at a low
speed or backing up. (



P.288)

■

Parking Support Brake function
(rear-crossing vehicles) (if
equipped)

Rear radar sensors are used to detect
approaching vehicles in the detection
area behind the vehicle when backing
up. (



P.291)

PKSB (Parking Support
Brake)

*

The Parking Support Brake system
consists of the following functions
that operate when driving at a low
speed or backing up, such as when
parking. When the system deter-
mines that the possibility of a colli-
sion with a detected object is high, a
warning operates to urge the driver
to take evasive action. If the system
determines that the possibility of a
collision with a detected object is
extremely high, the brakes are
automatically applied to help avoid
the collision or help reduce the
impact of the collision.

PKSB (Parking Support Brake)
system

WARNING

■

Cautions regarding the use of the sys-

tem

Do not overly rely on the system, as

doing so may lead to an accident.

●

The driver is solely responsible for safe

driving. Always drive carefully, taking

care to observe your surroundings.

The Parking Support Brake system is

designed to provide support to lessen

the severity of collisions. However, it

may not operate in some situations.

●

The Parking Support Brake system is

not designed to stop the vehicle com-

pletely. Additionally, even if the system

has stopped the vehicle, it is necessary

to depress the brake pedal immedi-

ately as brake control will be canceled

after approximately 2 seconds.

●

It is extremely dangerous to check the

system operations by intentionally

driving the vehicle into the direction of

a wall, etc. Never attempt such actions.

■

When to disable the Parking Support

Brake

In the following situations, disable the

Parking Support Brake as the system

may operate even though there is no

possibility of a collision.

●

When inspecting the vehicle using a

chassis roller, chassis dynamo or free

roller

●

When loading the vehicle onto a boat,

truck or other transport vessel

●

If the suspension has been modified or

tires of a size other than specified are

installed

●

If the front of the vehicle is raised or

lowered due to the carried load

283

4

4-5. Using the driving support systems

Driving

The Parking Support Brake can be
enabled/disabled on the multi-informa-

tion display. All of the Parking Support
Brake functions (static objects and
rear-crossing vehicles) are ena-
bled/disabled simultaneously.
Use the meter control switches to ena-
ble/disable the parking support brake.
(



P.80)

1

Press

or

to select

.

2

Press

or

to select

and then press

.

When the Parking Support Brake is disa-

bled, the PKSB OFF indicator (



P.70)

illuminates on the multi-information dis-

play.
To re-enable the system when it was disa-
bled, select

on the multi-information

display, select

and turn it on. If the

system is disabled, it will remain off even if

the engine switch is turned to IGNITION

ON mode after the engine switch has

been turned off.

If the engine output restriction control or
brake control operates, a buzzer will sound
and a message will be displayed on the
Center Display and multi-information dis-
play, to alert the driver. On vehicles with a
head-up display, the head-up display (if
equipped) will display the same message
as the multi-information display.
Depending on the situation, engine output
restriction control will operate to either
limit acceleration or restrict output as
much as possible.



Engine output restriction control is
operating (acceleration restriction)

WARNING

●

When equipment that may obstruct a

sensor is installed, such as a towing

eyelet, bumper protector (an addi-

tional trim strip, etc.), bicycle carrier, or

snow plow

●

When using automatic car washing

devices

●

If the vehicle cannot be driven in a sta-

ble manner, such as when the vehicle

has been in an accident or is malfunc-

tioning

●

When the vehicle is driven in a sporty

manner or off-road

●

When the tires are not properly

inflated

●

When the tires are very worn

●

When a tire chains, compact spare tire

or an emergency tire puncture repair

kit is used

NOTICE

■

If “Parking Support Brake Unavaila-

ble” is displayed on the multi-informa-

tion display and the PKSB OFF

indicator is flashing

If this message is displayed immediately

after the engine switch is changed to

IGNITION ON mode, operate the vehi-

cle carefully, paying attention to your

surroundings. It may be necessary to

drive the vehicle for a certain amount of

time before the system returns to normal.

(If the system is not return to normal after

driving for a while, clean the sensors and

their surrounding area on the bumpers.)

Enabling/Disabling the Parking
Support Brake

Displays and buzzers for engine
output restriction control and
brake control

284

4-5. Using the driving support systems

Acceleration greater than a certain
amount is restricted by the system.
Center Display (Panoramic view monitor)
(If equipped): No warning displayed
Multi-information display: “Object
Detected Acceleration Reduced”
PKSB OFF indicator: Not illuminated
Buzzer: Does not sound



Engine output restriction control is
operating (output restricted as
much as possible)

The system has determined that stron-
ger-than-normal brake operation is neces-
sary.
Center Display (Panoramic view monitor)
(If equipped): “BRAKE!”
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep



Brake control is operating

The system determined that emergency
braking is necessary.
Center Display (Panoramic view monitor)
(If equipped): “BRAKE!”
Multi-information display: “BRAKE!”
PKSB OFF indicator: Not illuminated
Buzzer: Short beep



Vehicle stopped by system opera-
tion

The vehicle has been stopped by brake
control operation.
Center Display (Panoramic view monitor)
(If equipped): “Press Brake Pedal”
Multi-information display: “Switch to
Brake” (If the accelerator pedal is not
depressed, “Press Brake Pedal” will be dis-
played.)
PKSB OFF indicator: Illuminated
Buzzer: Short beep

If the Parking Support Brake determines that a collision with a detected object is
possible, the engine output will be restricted to restrain any increase in the vehicle
speed. (Engine output restriction control: See figure 2.)
Additionally, if the accelerator pedal continues to be depressed, the brakes will be
applied automatically to reduce the vehicle speed. (Brake control: See figure 3.)



Figure 1 When the PKSB (Parking Support Brake) is disabled

System overview

285

4

4-5. Using the driving support systems

Driving

Engine output
Braking force
Time



Figure 2 When engine output restriction control operates

Engine output
Braking force
Time
Engine output restriction control begins operating
System determines that possibility of collision with detected object is high
Engine output reduced
Example: Multi-information display: “BRAKE!”

A
B
C

A
B
C
D

E
F

G

286

4-5. Using the driving support systems



Figure 3 When brake control operates

Engine output
Braking force
Time
Engine output restriction control begins operating
System determines that possibility of collision with detected object is high
Engine output reduced
System determines that possibility of collision with detected object is extremely
high
Brake control begins operating
Brake control strength increased
Example: Multi-information display: “BRAKE!”
Example: Multi-information display: “Switch to Brake”

■

If the Parking Support Brake has oper-

ated

If the vehicle is stopped due to operation of

the Parking Support Brake, the Parking

Support Brake will be disabled and the

PKSB OFF indicator will illuminate. If the

Parking Support Brake operates unneces-

sarily, brake control can be canceled by

depressing the brake pedal or waiting for

approximately 2 seconds for it to automati-

cally be canceled. Then, the vehicle can be

operated by depressing the accelerator

pedal.

■

Re-enabling the Parking Support Brake

To re-enable the Parking Support Brake

when it has been disabled due to system

operation perform any of the following

operations.
At this time, the PKSB OFF indicator will

turn off. (



P.72)

●

Turn the PKSB (Parking Support Brake)

on (



P.283)

●

The shift lever is in P.

A
B
C
D

E
F

G

H

I

J

K

287

4

4-5. Using the driving support systems

Driving

●

Drive with no operation targets in the

traveling direction of the vehicle

●

Change the traveling direction of the

vehicle

■

If “Parking Support Brake Unavailable”

is displayed on the multi-information

display and the PKSB OFF indicator is

flashing

If this message is displayed only when the

shift lever is in any position other than R, a

sensor on the front or rear bumper may be

dirty. Clean the sensors and their surround-

ing area on the bumpers.

■

If “Parking Assist Unavailable” and

“Parking Assist Unavailable Clean

Parking Assist Sensor” are displayed on

the multi-information display and the

PKSB OFF indicator is flashing

●

A sensor may be covered with ice, snow,

dirt, etc. Remove the ice, snow, dirt, etc.,

from the sensor to return the system to

normal.

If this message is shown even after

removing dirt from the sensor, or shown

when the sensor was not dirty to begin

with, have the vehicle inspected by any

authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.

●

A sensor may be frozen. Once the ice

melts, the system will return to normal.

●

Water may be continuously flowing over

the sensor surface, such as in a heavy

rain. When the system determines that it

is normal, the system will return to nor-

mal.

■

If a battery terminal has been discon-

nected and reconnected

The system needs to be initialized. To initial-

ize the system, drive the vehicle straight

ahead for 5 seconds or more at a speed of

approximately 35 km/h (22 mph) or more.

Additionally, for vehicles with the Parking

Support Brake function, turn the steering

wheel fully to the left and right with the vehi-

cle stopped.