2021 LEXUS NX300h brake

2534-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
4
Driving
*:If equipped
The system operates in the following
situations when a static object is
detected in the traveling direction of
the vehicle.
■The vehicle is driven at low speeds
and the brake pedal is not
depressed, or is depressed too late
■The accelerator pedal is depressed
too far
Parking Support Brake func-
tion (for static objects)*
When a collision may occur with a
static object while parking or trav-
eling at low speeds, when the vehi-
cle suddenly moves forward due to
mistaken accelerator pedal opera-
tion, or when the vehicle moves due
to the shift lever being in the wrong
position, the sensors detect static
objects to the front or rear in the
traveling direction of the vehicle,
and the system operates to lessen
impact with static objects such as
walls, and reduce resulting dam-
age.
Examples of system operation

2544-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
■When the shift lever is mistakenly
in D and the vehicle moves forward
■Sensor positions and types
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
This system can be enabled/disabled
on the multi-information display.
WARNING
■For safe use
Do not rely solely upon the system. Rely-
ing solely upon the sy stem may lead to an
unexpected accident.
●Driving safely is the sole responsibility
of the driver. Pay careful attention to
the surrounding conditions in order to
ensure safe driving. The Parking Sup-
port Brake function (f or static objects)
can provide support to lessen the
severity of collisions. However, it may
not operate depending on the situa-
tion.
●The Parking Support Brake function
(for static objects) is not a system
designed to completely stop the vehi-
cle. Furthermore, even if the Parking
Support Brake function (for static
objects) is able to stop the vehicle,
brake control is canceled after
approximately 2 seco nds, so depress
the brake pedal immediately.
Sensor positions and types
NOTICE
■Preventing sensor malfunctions
●If the area around a sensor is subjected
to an impact, equipment may not oper-
ate properly due to a sensor malfunc-
tion. Have the vehicle inspected by
your Lexus dealer.
●When using a high-pressure washer to
wash the vehicle, do not spray water
directly on the sensors. The sensors
may not function properly if subjected
to an impact from strong water pres-
sure.
●When using steam to wash the vehicle,
do not direct steam too close to the
sensors. The sensor s may not function
properly if subjected to steam.
Changing settings of the Park-
ing Support Brake function (for
static objects)
A
B
C
D

2554-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
4
Driving
1Press “ ” or “ ” of the meter
control switches and select .
2 Press “ ” or “ ” of the meter
control switches and select .
3 Press on the meter control
switches to enable/disable the sys-
tem.
The PKSB OFF indicator comes on
when the Parking Support Brake
function is OFF (not operating).
When the Parking Support Brake func- tion is switched OFF, system operation
does not resume until the function is
switched back ON through the set-
tings screen on the multi-information
display. (System operation does not
resume by operating the power
switch.)
■Hybrid system output restraint control
When there is a static object, where a pote ntial collision may occur, is detected, the
increase of the vehicle speed is restrained due to hybrid system output being con-
trolled.
Operation

2564-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
Accelerator pedal
Brake pedal
Hybrid system output
Braking force
ON
OFF
Control starts
Collision is likely
DOWN
“BRAKE!” is displayed in the multi-information display
“Switch to Brake” is displayed in the multi-information display
■Brake Control
If the accelerator is continuously depressed even after the hybrid system output is
being controlled, the brakes are engaged and the vehicle decelerates.
Accelerator pedal
Brake pedal
Hybrid system output
A
B
C
D
E
F
G
H
I
J
K
A
B
C

2574-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
4
Driving
Braking force
ON
OFF
Control starts
Collision is likely
DOWN
Collision possibility is very high
UP
“BRAKE!” is displayed in the multi-information display
“Switch to Brake” is displayed in the multi-information display
■Operation starting conditions
When the PKSB OFF indicator is not illumi-
nated or flashing ( P.254, 392) and all of
the following conditions are met, the system
operates.
●Hybrid system output restriction control
• The Parking Support Brake function (for static objects) is on.
• The vehicle speed is 10 mph (15 km/h) or less.
• There is a static ob ject in the traveling
direction of the vehicle (6 to 13 ft. [2 to 4
m] ahead).
• The system determined that a stronger- than-normal brake operation was neces-
sary to avoid a collision.
●Brake control
• Hybrid system output restriction control is being performed.
• The system determined that an emer-
gency brake operation was necessary to
avoid a collision.
■Operation ending conditions
In any of the following situations, the system
stops operating.
●Hybrid system output restriction control
• The Parking Support Brake function (for static objects) ha s been turned off
(stopped).
• The collision became avoidable with nor- mal brake operation. • The static object is no longer in the travel-
ing direction of the vehicle (6 to 13 ft. [2
to 4 m] ahead).
●Brake control
• The Parking Support Brake function (for static objects) has been turned off
(stopped).
• Approximately 2 seconds elapsed after the vehicle was stopped by brake control.
• The brake pedal was depressed after the
vehicle was stopped by brake control.
• The static object is no longer in the travel- ing direction of the vehicle (6 to 13 ft. [2
to 4 m] ahead).
■Sensor detection range
The detection range of the Parking Support
Brake function (for static objects) differs
from the detection range of the clearance
sonar ( P.251).
Therefore, even if the clearance sonar
detects a static object and provides a warn-
ing, the Parking Support Brake function (for
static objects) may not start operating.
■Static objects not detected by the sen-
sors
The following static objects may not be
detected by the sensors.
●Objects such as people, cloth and snow,
that are difficult for sonic waves to reflect
off of. (In particular, people may also not
be detected depending on the type of
D
E
F
G
H
I
J
K
L
M

2584-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
clothing they are wearing.)
●Objects not perpendicular with the
ground, objects not at a right angle to the
traveling direction of the vehicle, uneven
objects or waving objects
●Low objects
●Thin objects such as wires, fences, ropes
and signposts
●Objects that are extremely close to the
bumper
●Sharply-angled objects
●Tall objects with upper sections project-
ing outwards in the direction of your vehi-
cle
■Situations in which the Parking Support
Brake function (for static objects) may
not operate
When driving with the shift lever in N
■Situations when the system may operate
even though there is no possibility of a
collision
In the following situations, the system may
operate even though there is no possibility
of a collision.
●Environmental influence
• The vehicle is driven on a narrow road
• The vehicle is driven on a gravel road or in an area with tall grass
• The vehicle is driven toward a banner or flag, a low-hanging branch or a boom barrier (such as thos
e used at railroad
crossings, toll gates and parking lots).
• There is a static object on the shoulder of
the road (when the vehicle is driven in a
narrow tunnel, on a narrow bridge or on a
narrow road)
• The vehicle is be ing parallel parked
• There is a rut or hole in the surface of the road
• When the vehicle is driven on a metal cover (grating), such as those used for
drainage ditches
• The vehicle is driven on a steep slope
• The sensor is covered by water on a flooded road
●Influence from the weather
• Ice, snow, dirt, etc., has adhered to the
sensor (if removed, the system returns to
normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a
sand storm
●Influence from other sonic waves
• An ultrasonic wave source is nearby, such as the horn or clearance sonar of another
vehicle, a vehicle detector, a motorcycle
engine or the air brake of a large vehicle
• Electronic components (such as a backlit
license plate (especially fluorescent
types), fog lights, a fe nder pole or a wire-
less antenna) are installed near the sen-
sors
●Changes in the vehicle
• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the carried load (the
nose tilts up or down)
• The direction of the sensor has deviated due to a collision or other impact
■Situations in which the system may not
operate normally
In the following situations, the system may
not operate normally.
●Environmental influence
• There is a static object that cannot be
detected between the vehicle and
another static object that can be
detected
• A static object such as another vehicle, a motorcycle, a bicycle or a pedestrian cuts
in front of the vehicle or jumps out from

2594-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
4
Driving
the side.
●Influence from the weather
• The area around the sensor is extremely hot or cold
• The wind is strong
• Ice, snow, dirt, etc., has adhered to the sensor (if removed, the system returns to
normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a
sand storm
●Influence from other sonic waves
• An ultrasonic wave source is nearby, such as the horn or clearance sonar of another
vehicle, a vehicle detector, a motorcycle
engine or the air brake of a large vehicle
• Electronic components (such as a backlit
license plate (especially fluorescent
types), fog lights, a fender pole or a wire-
less antenna) are inst alled near the sen-
sors
●Changes in the vehicle
• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the carried load (the
nose tilts up or down)
• The direction of the sensor has deviated due to a collision or other impact
■When “Parking Support Brake Unavail-
able” is displayed on the multi-informa-
tion display and the PKSB OFF indicator
flashes
●Ice, snow, dirt, etc., may have adhered to the sensor. If this occurs, remove the ice,
snow, dirt, etc., from the sensor to return
the system to normal.
Also, a warning message may be dis-
played at low temperatures due to ice
forming on the sensor, and the sensor
may not detect static objects. Once the
ice melts, the system will return 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.
●System initialization may not have been
performed after remova
l and installation
of the 12-volt battery. Perform system ini-
tialization.
■When removing and installing the 12-
volt battery
The system needs to be initialized.
The system can be init ialized by driving the
vehicle straight ahead for 5 seconds or
more at a speed of approximately 22 mph
(35 km/h) or higher.
■When “Parking Support Brake Mal-
function Visit Your Dealer” is displayed
on the multi-information display, the
PKSB OFF indicator flashes and the
buzzer sounds
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
WARNING
■In order for the system to operate
properly
Make sure to observe the following pre-
cautions regarding the sensors
(  P.251). Failure to observe these pre-
cautions may cause the sensors not to
operate properly, and may result in an
unexpected accident.
●Do not perform work such as modifi-
cation, disassembly or painting
●Only perform replacements using
genuine parts

2604-5. Using the driving support systems
LEXUS NX300h Owners Manual_USA_M78578_en
When the hybrid system output restric-
tion control or brake control operates,
the buzzer sounds and a message is
displayed on the multi-information dis- play, head-up display and naviga-
tion/multimedia system screen to alert
the driver.
Depending on the situat
ion, output restric-
tion control operates to either limit accel-
eration or restrict output as much as
possible.
■Hybrid system output restriction
control is operating (acceleration
limitation control)
■Hybrid system output restriction
control is operating (control to
restrict output as much as possible)
●Do not subject the area around the
sensors to any impacts
●Do not damage the sensors, and
always keep them clean
■Handling the suspension
Do not modify the suspension, as
changes to the height or incline of the
vehicle may prevent the sensors from
correctly detecting static objects, may
cause the system not operate, or may
cause the system to operate unnecessar-
ily.
NOTICE
■Preventing unnecessary operation
In the following situations, turn the Park-
ing Support Brake func tion (for static
objects) OFF. The system may operate
even though there is no possibility of a
collision.
●A chassis roller, chassis dynamo, free
roller or similar equipment is being
used for an inspection, etc.
●The vehicle is being loaded onto a ship,
truck or other transport vessel
●The suspension has been lowered or
tires that have a different size than the
genuine tires are equipped
●The height of the vehicle has drastically
changed due to the carried load (the
nose tilts up or down).
●A towing hook is installed
●When using an automatic car wash
Display and buzzer for hybrid
system output restriction con-
trol and brake control
Situation
Acceleration at a certain
speed or higher is not possible.
Multi-informa-tion dis-
play/Head-up display
“Object Detected Accel- eration Reduced”
Naviga-
tion/multime- dia system screen

PKSB OFF IndicatorNot illuminated
Buzzer
Situation
A stronger than normal
brake operation is neces- sary
Multi-informa-tion dis-
play/Head-up display
“BRAKE!”Naviga-
tion/multime- dia system screen