brake sensor LEXUS NX300h 2018 User Guide

2294-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving ■
Muting the buzzer sound●
To mute the buzzer sound
The buzzer can be temporarily muted by
pressing of the meter control
switches while an obstacle detection dis-
play is shown on the multi-information
display.●
To cancel the mute
Mute will be automatically cancelled in
the following situations.
• When the shift position is changed
• When the vehicle speed has reached or
exceeded approximately 6 mph (10 km/
h) with the shift lever in D
• When the intuitive par king assist is turned
off once and turned on again
• When the power switch is turned off once
and turned to ON mode again
• When a sensor is malfunctioning ■
Certification 
For vehicles sold in the U.S.A.
This device complies with Part 15 of the
FCC Rules. Operation is subject to the fol-
lowing two conditions; (1) this device may
not cause harmful interference, and (2) this
device must accept any interference
received, including interference that may
cause undesired operation. 
For vehicles sold in Canada
This ISM device complies with Canadian
ICES-001.
Cet appareil ISM est conforme a la norme
NMB-001 du Canada. ■
Intuitive parking assist display
When an obstacle is detected while the
Lexus parking assist monitor is in use, the
warning indicator will appear in the upper
corner of the screen even if the display set-
ting has been set to off.
■
If “Clean Parking Assist Sensor” is dis-
played on the multi-information display
A sensor may be dirty or covered with snow
or ice. In such cases, if it is removed from
the sensor, the system should return to nor-
mal.
Also, due to the sensor being frozen at low
temperatures, a malfunction display may
appear or an obstacle may not be detected. If the sensor thaws out, the system should
return to normal. ■
If “Parking Assist Malfunction” is dis-
played on the multi-information display
Depending on the malf unction of the sen-
sor, the device may not be working nor-
mally. Have the vehicle inspected by your
Lexus dealer. ■
Sensor detection information ●
The sensor’s detectio n areas are limited
to the areas around the vehicle’s bumper. ●
Certain vehicle conditions and the sur-
rounding environment may affect the
ability of a sensor to correctly detect an
obstacle. Particular instances where this
may occur are listed below.
• There is dirt, snow or ice on the sensor.
(Wiping the sensors will resolve this
problem.)
• The sensor is frozen. (Thawing the area
will resolve this problem.)
In especially cold weather, if a sensor is
frozen the screen may show an abnormal
display, or obstacles may not be
detected.
• The sensor is covered in any way.
• The vehicle is leaning considerably to one
side.
• 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.
• The sensor is coated with a sheet of spray
or heavy rain.
• The vehicle is equipped with a fender
pole or wireless antenna.
• Towing eyelets are installed.
• The bumper or sensor receives a strong
impact.
• A backlit license plate, license plate
holder, etc., are installed.
• The vehicle is approaching a tall or
curved curb.
• In harsh sunlight or intense cold weather.
• The area directly under the bumpers is
not detected.
• If obstacles draw too close to the sensor.
• A non-genuine Lexus suspension (low-

232 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U ■
Buzzer operation and distance to
an obstacle
A buzzer sounds when the sensors are
operating.
 The buzzer sounds faster as the
vehicle approaches an obstacle.
When the vehicle comes within the
following distance of the obstacle,
the buzzer sounds continuously. • Front corner sensors: Approximately 1.0
ft. (30 cm)
• Front center sensors: Approximately 1.0
ft. (30 cm)
• Rear corner sensors: Approximately 1.0
ft. (30 cm)
• Rear center sensors: Approximately 1.2
ft. (35 cm)
 When 2 or more obstacles are
detected simultaneously, the buzzer
system responds to the nearest
obstacle. If one or both come within
the above distances, the beep will
repeat a long tone, followed by fast
beeps. ■
Customization
Settings (e.g. buzzer sounds volume) can
be changed. ( → P.425) *
: If equipped
The system operates in the following
situations when an obstacle 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 lateParking Support Brake func-
tion (for static objects) *
When a collision may occur with an
obstacle while parking or traveling
at low speeds, when the vehicle
suddenly moves forward due to
mistaken accelera tor pedal opera-
tion, or when the vehicle moves due
to the shift lever being in the wrong
position, the sensors detect obsta-
cles to the front or rear in the travel-
ing direction of the vehicle, and the
system operates to lessen impact
with obstacles such as walls, and
reduce resulting damage.
Examples of system operation

2334-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving ■
The accelerator pedal is depressed
too far
■
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 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 th e sole responsibility
of the driver. Pay careful attention to
the surrounding conditions in order to
ensure safe driving. The Parking Sup-
port Brake function (for 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 seconds, so depress
the brake pedal immediately.
Sensor positions and types
A
B
C
D

234 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U This system can be enabled/disabled
on the multi-information display.
1 Press “ ” 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.)
■
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.
■
Hybrid system output restraint control
When there is an obstacle, where a potent ial collision may occur, is detected, the
increase of the vehicle speed is restrained due to hybrid system output being con-
trolled. NOTICE■
Preventing sensor malfunctions●
If the area around a sensor is subjected
to an impact, equi pment 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 sensors may not function
properly if subjected to steam.
Changing settings of the Park-
ing Support Brake function (for
static objects)
Operation

2374-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving ●
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 obstacle is no longer in the traveling
direction of the vehicle (6 to 13 ft. [2 to 4
m] ahead).●
Brake control
• The Parking Support Brake function (for
static objects) ha s 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 obstacle is no longer in the traveling
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.231).
Therefore, even if the clearance sonar
detects an obstacle and provides a warning,
the Parking Support Brake function (for
static objects) may not start operating.
■
Obstacles not detect ed by the sensors
The following obstacles 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
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 ■
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 an obstacle 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

238 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 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 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■
Situations in which the system may not
operate normally
In the following situations, the system may
not operate normally. ●
Environmental influence
• There is an obstacle that cannot be
detected between the vehicle and
another obstacle that can be detected
• An obstacle such as another vehicle, a
motorcycle, a bicycle or a pedestrian cuts
in front of the vehicle or jumps out from
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 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 ■
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 obstacles. Once the ice
melts, the system wi ll 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

2394-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving performed after remova l and installation
of the 12-volt battery. Perform system ini-
tialization.■
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.
When the hybrid system output restric-
tion control or brak e control operates,
the buzzer sounds and a message is
displayed on the multi-information dis-
play 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.WARNING■
In order for the system to operate
properly
Make sure to observe the following pre-
cautions regard ing the sensors
( → P.231). 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●
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 obstacles, may cause
the system not operate, or may cause the
system to operate unnecessarily. 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
Display and buzzer for hybrid
system output restriction con-
trol and brake control

240 4-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U ■
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)
■
Brake control is operating ■
The vehicle is stopped by system
operation
■
System operation
When the vehicle is stopped by system
operation, the Parking Support Brake func-
tion (for static objects) stops and the PKSB
OFF indicator illuminates. ■
System recovery
When the Parking Support Brake function
(for static objects) is stopped by system
operation and you would like to resume
operation, either turn the Parking Support
Brake function (for static objects) ON again
( → P.234), or turn the power switch off and
then back on. Furthermore, when the vehi-
cle moves with an obstacle no longer in the
traveling direction of the vehicle, or when
the traveling direction of the vehicle
changes (such as when switching from
moving forward to backing up, and vice
versa), system operation automatically
resumes.
■
Clearance sonar buzzer
Regardless of whether the clearance sonar
is on or off, if the Parking Support Brake
function (for static ob jects) is not stopped
( → P.234), when the front or rear sensors
detect an obstacle and brake control is per-
formed, the clearance sonar buzzer also
sounds and a notification of the approxi-
mate distance to the obstacle is provided.Situation Acceleration at a certain
speed or higher is not
possible.
Multi-informa-
tion display/
Head-up dis-
play “Object Detected Accel-
eration Reduced”
PKSB OFF
Indicator Not illuminated
Buzzer ⎯
Situation A stronger than normal
brake operation is neces-
sary
Multi-informa-
tion display/
Head-up dis-
play “BRAKE!”
PKSB OFF
Indicator Not illuminated
Buzzer Short beep
Situation Emergency braking is
necessary
Multi-informa-
tion display/
Head-up dis-
play “BRAKE!”
PKSB OFF
Indicator Not illuminated
Buzzer Short beep Situation The vehicle is stopped
after brake control oper-
ation
Multi-informa-
tion display/
Head-up dis-
play “Switch to Brake”
PKSB OFF
Indicator Illuminated
Buzzer Short beep

2414-5. Using the driving support systems
LEXUS NX300h Owners Manu-
al_USA_OM78212U 4
Driving ■
In the unlikely event that the Parking
Support Brake function (for static
objects) mistakenly operates at a cross-
ing or elsewhere
Even in the unlikely ev ent that the Parking
Support Brake function (for static objects)
mistakenly operates at a crossing or else-
where, brake control is canceled after
approximately 2 seconds, allowing you to
proceed forward and leave the area. Fur-
thermore, brake control is also canceled
when the brake pedal is depressed.
Depressing the accelerator pedal again
allows you to proceed forward and leave
the area. *
: If equipped
BSM main switch Pressing the switch turns the system on or BSM (Blind Spot Monitor) *
The Blind Spot Monitor uses the
sensors installed behind the rear
bumper. The system is intended to
assist the driver check areas that
are not easily visible. The system
has the following 2 functions:
 The Blind Spot Monitor function Assists the driver in making the decision
when changing lanes
 The Rear Cross Traffic Alert func-
tion Assists the driver when backing up
These functions use the same sen-
sors.
System components
A

368 7-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_OM78212U ■
LDA indicator
■
PKSB OFF indicator
■
Slip indicator light
■
Brake hold operated indicator Warning light Details/Actions
(Orange)
Indicates a malfunction in the LDA (Lane Departure Alert
with steering control)
→ When “Lane Departure Alert Unavailable” is dis-
played on the multi-information display, turn the LDA
system off, drive the vehicle for a short time, and then
turn the LDA system back on. ( → P.210)
When a message other than above is displayed, follow
the instructions displayed in the message.
Warning light Details/Actions
(Flashes) When a buzzer sounds: Indicates a malfunction in the PKSB
(Parking Support Brake) system
→ Have the vehicle inspected by your Lexus dealer
immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, pos-
sibly due to a sensor being di rty or covered with ice, etc.
→ Clear the dirt, etc.
Warning light Details/Actions
Indicates a malfunction in:
 The VSC system;
 The TRAC system; or
 The hill-start assist control system
The light will flash when the ABS, VSC or TRAC system is
operating.
→ Have the vehicle inspected by your Lexus dealer
immediately.
Warning light Details/Actions
(Flashes) Indicates a malfunction in the brake hold system
→ Have the vehicle inspected by your Lexus dealer
immediately.