LEXUS RX350 2022 Owners Manual

2494-5. Using the driving support systems
4
Driving
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 othe
r 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 vehicl e and/or object may
increase in the following situations:
●When the parking sp ace 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, sigh, or parked vehicle, which may
reflect electrical waves toward the rear of
the vehicle, is short

2504-5. Using the driving support systems
●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 othe r than specified are
installed
●If the front of the vehicle is raised or low-
ered due to the carried load

2514-5. Using the driving support systems
4
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.257)
■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.260)
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 applie d 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 vehicl e, 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 othe r 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

2524-5. Using the driving support systems
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
enabled/disabled simultaneously.
Use the meter control switches to enable/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 dis-
abled, the PKSB OFF indicator ( P.70)
illuminates on the multi-information dis-
play.
To re-enable the system when it was dis-
abled, select on the multi-information
display, select and turn it on. If the
system is disabled, it wi ll 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 displa y the same message
as the multi-information display.
Depending on the situat ion, 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”
WARNING
●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 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 engine switch is changed to
IGNITION ON mode, operate the vehi-
cle carefully, paying attention to your
surroundings. It ma y 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

2534-5. Using the driving support systems
4
Driving
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 contin ues to be depressed, the brakes will be
applied automatically to redu ce the vehicle speed. (Brake control: See figure 3.)
 Figure 1 When the PKSB (Parki ng Support Brake) is disabled
System overview

2544-5. Using the driving support systems
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!”
 Figure 3 When brake control operatesA
B
C
A
B
C
D
E
F
G

2554-5. Using the driving support systems
4
Driving
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 col lision 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 stoppe d 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.252)
●The shift lever is in P.
●Drive with no operation targets in the
traveling direction of the vehicle
●Change the travelin g direction of the
vehicle
A
B
C
D
E
F
G
H
I
J
K

2564-5. Using the driving support systems
■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 your
Lexus dealer.
●A sensor may be frozen. Once the ice
melts, the system will return to normal.
●Water may be continuo usly 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 22 mph (35 km/h) 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.

2574-5. Using the driving support systems
4
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 ma y 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

2584-5. Using the driving support systems
■When the accelerator pedal is depressed excessively
■When the vehicle moves in the unintend ed direction due to the wrong shift
lever position
 P.238
■The Parking Support Brake function
(static object) will operate when
The function will operate when the PKSB
OFF indicator is not illuminated or flashing
Types of sensors
WARNING
■To ensure the system can operate
properly
 P.239
■If the Parking Support Brake function
(static objects) operates unnecessar-
ily, such as at a railroad crossing
P.239
■Notes when washing the vehicle
P.240