Lexus UX 300e (2022 year). Manual in english - page 18

311

5-4. Using the driving support systems

ivin
g

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
(vehicles with 10.3-inch display model)

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 dis-
play. (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 cen-

ter sensor)

: Automatic buzzer mute function is enabled. (



P.312)



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

(Front cen-

ter sensor)

: Automatic buzzer mute function is enabled. (



P.312)



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

: Automatic buzzer mute function is enabled. (



P.312)

B
C

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

312

5-4. Using the driving support systems



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

: Automatic buzzer mute function is enabled. (



P.312)



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

: Automatic buzzer mute function is disabled. (



P.312)

: The distance segments will blink slowly.



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

: Automatic buzzer mute function is disabled. (



P.312)

: 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

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

Multi-information display

Center Display

Head-up display

313

5-4. Using the driving support systems

ivin
g

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.305)

: If equipped

RCTA (Rear Crossing Traffic
Alert) function

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

WARNING

Cautions regarding the use of the

system

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.293)

To ensure the system can operate

properly



P.301

314

5-4. Using the driving support systems

Multi-information display

The RCTA function can be turned 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.315) 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. The buzzer also sounds
for approximately 1 second immediately
after the RCTA function is turned on.

Use the meter control switches to
enable/disable the RCTA function.
(



P.164)

Press

to select

Press

to select “PKSA”

and then press “OK”.

Press

to select “RCTA”

and then press “OK”.

Each time the power switch is turned off

then changed to ON, the RCTA function

will be enabled automatically.

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 “RCTA Unavailable” is shown on

the multi-information display

Ice, water, snow, mud, etc., may be attached

to the rear bumper around the sensors.

(



P.301) Remove the ice, snow, mud, etc.,

attached to the rear bumper around the

sensors to return the function to normal.
Additionally, the function may not operate

normally when used in extremely hot or

cold environments.

Rear side radar sensors



P.301

System components

Turning the RCTA function
on/off

315

5-4. Using the driving support systems

ivin
g

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.

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

RCTA function detection areas

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

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 power switch is in ON.

The RCTA function is on.

The shift position is in R.

RCTA function

A
B

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.)

316

5-4. Using the driving support systems

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.305)

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:

When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area.

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

covering the sensor or 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.

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 angle park-

ing spot.

When towing a trailer.

When there is a significant difference in

317

5-4. Using the driving support systems

ivin
g

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-

sarily 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.

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 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.).

318

5-4. Using the driving support systems

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.

: If equipped

Parking Support Brake function
(static objects)



P.323

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



P.325

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

319

5-4. Using the driving support systems

ivin
g

WARNING

Cautions regarding the use of the

system

Do not overly rely on the system, as

doing so may lead to an accident. Always

drive while checking the safety of the sur-

roundings of the vehicle. Depending on

the vehicle and road conditions, weather,

etc., the system may not operate. The

detection capabilities of sensors and

radars are limited. Always drive while

checking the safety of the surroundings

of the vehicle.

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.

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 tire chains, a compact spare tire

or an emergency tire puncture repair

kit are used.

NOTICE

If “Parking Support Brake Unavail-

able” is displayed on the multi-infor-

mation display and the PKSB OFF

indicator is flashing

If this message is displayed immediately

after the power switch is changed to ON,

operate the vehicle carefully, paying

attention to your surroundings. It may be

necessary to drive the vehicle for a cer-

tain amount of time before the system

returns to normal. (If the system does not

return to normal after driving for a while,

clean the sensors and their surrounding

area on the bumpers.)

320

5-4. Using the driving support systems

The Parking Support Brake can be
enabled/disabled on the multi-infor-
mation display. All of the Parking Sup-
port Brake functions (static objects and
rear crossing vehicles) are
enabled/disabled simultaneously.
Use the meter control switches to
enable/disable the parking support
brake. (



P.164)

Press

to select

Press

to select

and

then press “OK”.

When the Parking Support Brake is dis-

abled, the PKSB OFF indicator (



P.159)

illuminates on the multi-information dis-

play.
When the Parking Support Brake is turned

on or off, operation of the Parking Support

Brake continues in the same condition the

next time the EV system is started.

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

as much as possible.



EV system output restriction control
is operating (acceleration restric-
tion)

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



EV system output restriction control
is operating (output restricted as
much as possible)

The system has determined that stronger-
than-normal brake operation is necessary.
Center Display (Panoramic view monitor):
“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):
“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):
“Press Brake Pedal”

Enabling/Disabling the Parking
Support Brake

Displays and buzzers for EV sys-
tem output restriction control
and brake control

321

5-4. Using the driving support systems

ivin
g

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 deter-
mines that a collision with a detected
object is possible, the EV system out-
put will be restricted to restrain any
increase in the vehicle speed. (EV sys-
tem output restriction control: See fig-
ure 2 below.)
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 below.)



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

EV system output

Braking force

Time



Figure 2 When EV system output
restriction control operates

EV system output

Braking force

Time

EV system output restriction con-
trol begins operating (The system
determines that possibility of colli-
sion with detected object is high)

“BRAKE!” is displayed on the multi-infor-
mation display.

EV system output reduced



Figure 3 When brake control oper-
ates

EV system output

Braking force

Time

EV system output restriction con-
trol begins operating (The system
determines that possibility of colli-

System overview

A
B
C

A
B
C
D

322

5-4. Using the driving support systems

sion with detected object is high)

“BRAKE!” is displayed on the multi-infor-
mation display.

EV system output reduced

Brake control begins operating
(the system determines that possi-
bility of collision with detected
object is extremely high)

Brake control strength increased

“Switch to Brake” is displayed on
the multi-information display

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 is disabled due to operation of the

Parking Support Brake, either enable the

system again (



P.320), or turn the power

switch off and then back to ON. Addition-

ally, if the object becomes no longer in the

traveling direction of the vehicle or if the

traveling direction of the vehicle changes

(such as changing from moving forward to

backing up, or from backing up to moving

forward), the system will be re-enabled

automatically.

If “Parking Support Brake Unavailable”

is displayed on the multi-information

display and the PKSB OFF indicator is

flashing

If this message is displayed, a sensor on the

front or rear bumper may be dirty. Clean

the sensors and their surrounding area on

the bumpers.

If “Parking Support Brake 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. In this case, 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 12-volt battery terminal has been

disconnected 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.

E
F

323

5-4. Using the driving support systems

ivin
g

: 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

When the accelerator pedal is
depressed excessively

Parking Support Brake
function (static objects)

If the sensors detect a static object,
such as a wall, in the traveling direc-
tion of the vehicle and the system
determines that a collision may
occur due to the vehicle suddenly
moving forward due to an acciden-
tal accelerator pedal operation, the
vehicle moving the unintended
direction due to the wrong shift
position being selected, 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

324

5-4. Using the driving support systems

When the vehicle moves in the
unintended direction due to the
wrong shift position being selected



P.306

The Parking Support Brake function

(static objects) will operate when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(



P.158, 159) and all of the following con-

ditions are met:

EV system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 15

km/h (10 mph) or less.

• There is a static object in the traveling

direction of the vehicle and approxi-

mately 2 to 4 m (6 to 13 ft.) away.

• The Parking Support Brake determines

that a stronger-than-normal brake oper-

ation is necessary to avoid a collision.

Brake control

• EV system output restriction control is

operating.

• The Parking Support Brake determines

that an immediate brake operation is

necessary to avoid a collision.

The Parking Support Brake function

(static objects) will stop operating when

The function will stop operating if any of the

following conditions are met:

EV system output restriction control

• The Parking Support Brake is disabled.

• The system determines that the collision

has become avoidable with normal brake

operation.

• The static object is no longer approxi-

mately 2 to 4 m (6 to 13 ft.) away from the

vehicle or in the traveling direction of the

vehicle.

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• The static object is no longer approxi-

mately 2 to 4 m (6 to 13 ft.) away from the

vehicle or in the traveling direction of the

vehicle.

Detection range of the Parking Support

Brake function (static objects)

The detection range of the Parking Support

Brake function (static objects) differs from

the detection range of the Lexus parking

assist-sensor. (



P.310) Therefore, even if

the Lexus parking assist-sensor detects an

object and provides a warning, the Parking

Support Brake function (static objects) may

not start operating.

Types of sensors

WARNING

To ensure the system can operate

properly



P.307

If the Parking Support Brake function

(static objects) operates unnecessar-

ily, such as at a railroad crossing



P.322

Notes when washing the vehicle



P.308

325

5-4. Using the driving support systems

ivin
g

Situations in which the system may not

operate properly



P.309

Situations in which the system may

operate even if there is no possibility of a

collision



P.309

: If equipped

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

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



P.301

Parking Support Brake
function (rear-crossing vehi-
cles)

If a rear radar sensor detects a
vehicle approaching from the right
or left at the rear of the vehicle and
the system determines that the pos-
sibility of a collision is high, this
function will perform brake control
to reduce the likelihood of an
impact with the approaching vehi-
cle.

Examples of function operation

Types of sensors

326

5-4. Using the driving support systems

The Parking Support Brake function

(rear-crossing vehicles) will operate

when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(



P.158, 159) and all of the following con-

ditions are met:

EV system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 15

km/h (10 mph) or less.

• Vehicles are approaching from the right

or left at the rear of the vehicle at a travel-

ing speed of approximately 8 km/h (5

mph) or more.

• The shift position is in R.

• The Parking Support Brake determines

that a stronger than normal brake opera-

tion is necessary to avoid a collision with

an approaching vehicle.

Brake control

• EV system output restriction control is

operating.

• The Parking Support Brake determines

that an emergency brake operation is

necessary to avoid a collision with an

approaching vehicle.

The Parking Support Brake function

(rear-crossing vehicles) will stop oper-

ating when

The function will stop operating if any of the

following conditions are met:

EV system output restriction control

• The Parking Support Brake is disabled.

• The collision becomes avoidable with

normal brake operation.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

Detection area of the Parking Support

Brake function (rear-crossing vehicles)

The detection area of the Parking Support

Brake function (rear-crossing vehicles) dif-

fers from the detection area of the RCTA

function (



P.315). Therefore, even if the

RCTA function detects a vehicle and pro-

vides an alert, the Parking Support Brake

function (rear-crossing vehicles) may not

start operating.

Situations in which the system may not

operate properly



P.316

Situations in which the system may

operate even if there is no possibility of a

collision



P.317

WARNING

To ensure the system can operate

properly



P.301

Content .. 16 17 18 19 ..