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

366

4-5. Using the driving support systems

■

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.

■

Sensor detection information

●

The following situations may occur dur-

ing use.

• The sensor's detection areas are limited 

to the areas around the vehicle front and 

rear bumpers.

• Depending on the shape of the object 

and other factors, the detection distance 

may shorten, or detection may be impos-

sible.

• There will be a short delay between 

object detection and display. Even at low 

speeds, there is a possibility that the 

object will come within the sensor’s 

detection areas before the display is 

shown and the warning beep sounds.

• It might be difficult to hear the buzzer due 

to the volume of the audio system or air 

flow noise of the air conditioning system.

• It may be difficult to hear the buzzer if 

buzzers for other systems are sounding.

■

Conditions under which the function 

may not function correctly

Certain vehicle conditions and the sur-

rounding environment may affect the ability 

of a sensor to correctly detect objects. Par-

ticular instances where this may occur are 

listed below.

●

There is dirt, snow or ice on a sensor. 

(Cleaning the sensors will resolve this 

problem.)

●

A sensor is frozen. (Thawing the area will 

resolve this problem.) 

In especially cold weather, if a sensor is 

frozen the sensor display may be dis-

played abnormally, or objects, such as a 

wall, may not be detected.

●

A sensor is covered in any way.

●

When a sensor or the area around a sen-

sor is extremely hot or cold.

●

On an extremely bumpy road, on an 

incline, on gravel, or on grass.

●

The vicinity of the vehicle is noisy due to 

vehicle horns, motorcycle engines, air 

brakes of large vehicles, or other loud 

noises producing ultrasonic waves.

●

There is another vehicle equipped with 

parking assist sensors in the vicinity.

●

A sensor is coated with a sheet of spray 

or heavy rain.

●

If a sensor is hit by a large amount of 

water, such as when driving on a flooded 

road.

●

If the vehicle is significantly tilted.

●

The vehicle is approaching a tall or 

curved curb.

●

If objects draw too close to the sensor.

■

Objects which may not be properly 

detected

The shape of the object may prevent the 

sensor from detecting it. Pay particular 

attention to the following objects:

●

Wires, fences, ropes, etc.

●

Cotton, snow and other materials that 

absorb sound waves

●

Sharply-angled objects

●

Low objects

●

Tall objects with upper sections project-

ing outwards in the direction of your vehi-

cle

People may not be detected if they are 

wearing certain types of clothing.

367

4

4-5. Using the driving support systems

Driving

■

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)

*

: Automatic buzzer mute function is enabled. (



P.369)



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

*

 (Front 

center sensor)

Sensor detection display, object 
distance

A
B
C

Multi-information display

Center Display

Head-up display

368

4-5. Using the driving support systems

*

: Automatic buzzer mute function is enabled. (



P.369)



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

*

*

: Automatic buzzer mute function is enabled. (



P.369)



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

*

*

: Automatic buzzer mute function is enabled. (



P.369)



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

*1

*1

: Automatic buzzer mute function is disabled. (



P.369)

*2

: The distance segments will blink slowly.



Approximate distance to object: Less than 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

*2

Center Display

*2

Head-up display

369

4

4-5. Using the driving support systems

Driving

*1

: Automatic buzzer mute function is disabled. (



P.369)

*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.361)

Multi-information display

*2

Center Display

*2

Head-up display

370

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.372) 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.

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



P.92)



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.82) 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 

.

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.

System components

A

B

Turning the RCTA function 
on/off

C

D

371

4

4-5. Using the driving support systems

Driving

3

Press 

 or 

 to select “RCTA” 

and then press 

.

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



P.82) 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.358) 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.358

■

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.

WARNING

■

Cautions regarding the use of the 

function

The driver is solely responsible for safe 

driving. Always drive safely, taking care 

to observe your surroundings.
The RCTA function is only a supplemen-

tary function which alerts the driver that a 

vehicle is approaching from the right or 

left at the rear of the vehicle. As the 

RCTA function may not function cor-

rectly under certain conditions, the 

driver’s own visual confirmation of safety 

is necessary. Over reliance on this func-

tion may lead to an accident resulting 

death or serious injury.

NOTICE

■

Before using the RCTA function

Do not place objects near the sensors.

 RCTA function

372

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

373

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 less than approxi-

mately 8 km/h (5 mph).

●

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.361)

Use the meter control switches to change 

settings. (



P.92)

■

Conditions under which the RCTA func-

tion 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

*

*

: Depending on the conditions, detection 

of a vehicle and/or object may occur.

■

Conditions under which the RCTA func-

tion may not function correctly

●

The RCTA function may not detect vehi-

cles correctly in the following situations:

• When a sensor is misaligned due to a 

strong impact to the sensor or its sur-

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

374

4-5. Using the driving support systems

rounding area

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

covering a sensor or its surrounding area 

on 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

• If a vehicle is approaching the rear of 

your vehicle rapidly

• When a towing eyelet is installed to the 

rear of the vehicle.

• When backing up on a slope with a sharp 

change in grade

• When backing out of a shallow angle 

parking spot

• Immediately after the RCTA function is 

turned on

• Immediately after the engine is started 

with the RCTA function on

• When the sensors cannot detect a vehi-

cle due to obstructions

●

Instances of the RCTA function unneces-

sarily detecting a vehicle and/or object 

may increase in the following situations:

• When a vehicle passes by the side of your 

vehicle

• When the parking space faces a street 

and vehicles are being driven on the 

street

• When the distance between your vehicle 

and metal objects, such as a guardrail, 

wall, sign, or parked vehicle, which may 

reflect electrical waves toward the rear of 

the vehicle, is short

• When a towing eyelet is installed to the 

rear of the vehicle

375

4

4-5. Using the driving support systems

Driving

*

: 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.381)

■

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.387)

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-

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

■

Limitations of the Parking Support 

Brake system

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.

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

376

4-5. Using the driving support systems

bled/disabled simultaneously.
Use the meter control switches to ena-
ble/disable the parking support brake. 
(



P.92)

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.82) 

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)

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

Displays and buzzers for engine 
output restriction control and 
brake control

377

4

4-5. Using the driving support systems

Driving

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

Engine output
Braking force
Time



Figure 2 When engine output restriction control operates

System overview

A
B
C

378

4-5. Using the driving support systems

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!”



Figure 3 When brake control operates

Engine output
Braking force
Time

A
B
C
D

E
F

G

A
B
C

379

4

4-5. Using the driving support systems

Driving

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.84)

●

Turn the PKSB (Parking Support Brake) 

on (



P.375)

●

The shift lever is in P.

●

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 sur-

rounding area on the bumpers.

●

Initialization may not have been per-

formed after a battery terminal was dis-

connected and reconnected. Initialize the 

system. (



P.380)

If this message continues to be displayed 

even after initialization, have the vehicle 

inspected by any authorized Lexus 

retailer or Lexus authorized repairer, or 

any reliable repairer.

■

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-

D

E
F

G

H

I

J

K

380

4-5. Using the driving support systems

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.

381

4

4-5. Using the driving support systems

Driving

*

: If  equipped

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

■

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

Parking Support Brake function (static objects)

*

If the sensors detect a static object, such as a wall, in the travelling direction of 
the vehicle and the system determines that a collision may occur due to the 
vehicle suddenly moving forward due to an accidental accelerator pedal oper-
ation, the vehicle moving the unintended direction due to the wrong shift lever 
position, or while parking or traveling at low speeds, the system will operate to 
lessen the impact with the detected static object and reduce the resulting 
damage.

Examples of function operation