Lexus UX 300e (2022 year). Manual in english — page 18
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5-4. Using the driving support systems
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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.
Q
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.)
*1
*1
: Automatic buzzer mute function is disabled. (
P.312)
*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.312)
*2
: The distance segments will blink rapidly.
Q
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
*2
Center Display
*2
Head-up display
Multi-information display
*2
Center Display
*2
Head-up display
313
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5-4. Using the driving support systems
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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
Q
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)
Q
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)
1
Press
or
to select
.
2
Press
or
to select “PKSA”
and then press “OK”.
3
Press
or
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.
Q
Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir-
ror indicator may be difficult to see.
Q
Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear
over loud noises, such as if the audio system
volume is high.
Q
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.
Q
Rear side radar sensors
P.301
System components
A
B
C
D
Turning the RCTA function
on/off
315
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Q
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
Q
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
Q
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:
Q
The RCTA function is operational when
The RCTA function operates when all of the
following conditions are met:
O
The power switch is in ON.
O
The RCTA function is on.
O
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.)
A
316
5-4. Using the driving support systems
O
The vehicle speed is less than approxi-
mately 8 km/h (5 mph).
O
The approaching vehicle speed is
between approximately 8 km/h (5 mph)
and 28 km/h (18 mph).
Q
Setting the buzzer volume
The buzzer volume can be adjusted on the
multi-information display. (
P.305)
Q
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:
O
Vehicles approaching from directly
behind
O
Vehicles backing up in a parking space
next to your vehicle
O
Vehicles that the sensors cannot detect
due to obstructions
O
Guardrails, walls, signs, parked vehicles
and similar stationary objects
*
O
Small motorcycles, bicycles, pedestrians,
etc.
*
O
Vehicles moving away from your vehicle
O
Vehicles approaching from the parking
spaces next to your vehicle
*
O
The distance between the sensor and
approaching vehicle gets too close
*
: Depending on the conditions, detection
of a vehicle and/or object may occur.
Q
Situations in which the system may not
operate properly
The RCTA function may not detect vehicles
correctly in the following situations:
O
When the sensor is misaligned due to a
strong impact to the sensor or its sur-
rounding area.
O
When mud, snow, ice, a sticker, etc., is
covering the sensor or surrounding area
on the rear bumper.
O
When driving on a road surface that is
wet with standing water during bad
weather, such as heavy rain, snow, or fog.
O
When multiple vehicles are approaching
with only a small gap between each vehi-
cle.
O
When a vehicle is approaching at high
speed.
O
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.
O
When backing up on a slope with a sharp
change in grade.
O
When backing out of a sharp angle park-
ing spot.
O
When towing a trailer.
O
When there is a significant difference in
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height between your vehicle and the
vehicle that enters the detection area.
O
When a sensor or the area around a sen-
sor is extremely hot or cold.
O
If the suspension has been modified or
tires of a size other than specified are
installed.
O
If the front of the vehicle is raised or low-
ered due to the carried load.
O
When turning while backing up.
O
When a vehicle turns into the detection
area.
Q
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:
O
When the parking space faces a street
and vehicles are being driven on the
street.
O
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.
O
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.
O
When a vehicle passes by the side of your
vehicle.
O
When a detected vehicle turns while
approaching the vehicle.
O
When there are spinning objects near
your vehicle such as the fan of an air con-
ditioning unit.
O
When water is splashed or sprayed
toward the rear bumper, such as from a
sprinkler.
O
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
O
When the distance between your vehicle
and a guardrail, wall, etc., that enters the
detection area is short.
O
Gratings and gutters.
O
When a sensor or the area around a sen-
sor is extremely hot or cold.
O
If the suspension has been modified or
tires of a size other than specified are
installed.
O
If the front of the vehicle is raised or low-
ered due to the carried load.
*
: If equipped
Q
Parking Support Brake function
(static objects)
P.323
Q
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
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WARNING
Q
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.
O
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.
O
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.
O
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.
Q
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.
O
When inspecting the vehicle using a
chassis roller, chassis dynamo or free
roller.
O
When loading the vehicle onto a boat,
truck or other transport vessel.
O
If the suspension has been modified or
tires of a size other than specified are
installed.
O
If the front of the vehicle is raised or
lowered due to the carried load.
O
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.
O
When using automatic car washing
devices.
O
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.
O
When the vehicle is driven in a sporty
manner or off-road.
O
When the tires are not properly
inflated.
O
When the tires are very worn.
O
When tire chains, a compact spare tire
or an emergency tire puncture repair
kit are used.
NOTICE
Q
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)
1
Press
or
to select
.
2
Press
or
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
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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
E
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
Q
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.
Q
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.
Q
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.
Q
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
O
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.
O
A sensor may be frozen. Once the ice
melts, the system will return to normal.
O
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.
Q
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
G
H
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5-4. Using the driving support systems
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*
: If equipped
This function will operate in situations
such as the following if an object is
detected in the traveling direction of
the vehicle.
Q
When traveling at a low speed and
the brake pedal is not depressed,
or is depressed late
Q
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
Q
When the vehicle moves in the
unintended direction due to the
wrong shift position being selected
P.306
Q
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:
O
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.
O
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.
Q
The Parking Support Brake function
(static objects) will stop operating when
The function will stop operating if any of the
following conditions are met:
O
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.
O
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.
Q
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
Q
To ensure the system can operate
properly
P.307
Q
If the Parking Support Brake function
(static objects) operates unnecessar-
ily, such as at a railroad crossing
P.322
Q
Notes when washing the vehicle
P.308
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Q
Situations in which the system may not
operate properly
P.309
Q
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.
Q
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
Q
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:
O
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.
O
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.
Q
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:
O
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.
O
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.
Q
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.
Q
Situations in which the system may not
operate properly
P.316
Q
Situations in which the system may
operate even if there is no possibility of a
collision
P.317
WARNING
Q
To ensure the system can operate
properly
P.301
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