sensor SUBARU BRZ 2022 Owner's Guide

BSD/RCTA (If Equipped)
270driver check the rear and side areas of the
vehicle when moving backward.
If the system detects a vehicle
approaching from either side while moving
backward, it warns the driver of dangers in
the following way.
The BSD/RCTA approach indicator
light(s) on the outside mirror(s) flashes.
 A warning buzzer sounds.
 An icon appears on the center informa-
tion display.
▽ Limitations of the detectability
of RCTA
Since the detectability of RCTA is limited,
the RCTA may not operate properly in
angled parking.
Example 1
1) The detection range of the radar sensors
2) Area out of detection range of the radar sensors
A) Vehicle that may not be detected
B) Parked vehicle
Example 2
1) The detection range of the radar sensors C) Vehicle that may be detected
NOTEThe system may detect that a vehicle
(C) is passing in fr
ont of your vehicle.
Always be sure to check the
surroundings with your eyes when
reversing the vehicle.■
System Operation
▼
Operating conditions
The BSD/RCTA will operate when all of
the following conditions are met.
 The ignition switch is in the “ON” posi-
tion.
 The BSD/RCTA warning indicator and
BSD/RCTA OFF indicator are turned off.
 The vehicle is driven at speeds above
7 mph (12 km/h) (except when reversing).
 The shift lever/select lever is in the “R”
position (RCTA only).
The BSD/RCTA will not operate in the
following situations.
 The BSD/RCTA OFF indicator
appears.
 The vehicle speed is below 6 mph (10
km/h) even when the BSD/RCTA OFF
indicator does not appear (except when
reversing).
701818
2
A B
1
WARNING
An approaching vehicle (A) may not
be detected because the detection
range is limited by the parked vehi-
cle (B). Always be sure to check the
surroundings with your eyes when
reversing the vehicle.
701819
1
C
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BSD/RCTA (If Equipped)
271
Starting and Operating7
– CONTINUED –
NOTEIn the following cases, the BSD/
RCTA will stop operating and the BSD/
RCTA warning indicator will appear. - When a malfunction occurs in
the system, including the BSD/
RCTA approach indicator light
 If the BSD/RCTA warning indicator
appears, exercise proper caution. For
details, refer to "BSD/RCTA Warning
Indicator" 
P274.
 In the following cases, the BSD/
RCTA will temporarily stop operating
(or may stop operating) and the BSD/
RCTA OFF indicator will appear. - When the radar sensor becomes
significantly misaligned (If the orien-
tation of the radar sensor is shifted
for any reason, readjustment is
required. Have the sensor adjusted
at a SUBARU dealer.)
- When a large amount of snow or
ice sticks to the rear bumper surface
around the radar sensors
- When the vehicle is driven on a
snow-covered road or in an environ-
ment in which there are no objects
around (such as in a desert) for a
prolonged period of time
- When the temperature around
the radar sensors increases exces-
sively due to long driving on uphill
grades in the summer, etc. - When the temperature around
the radar sensors becomes
extremely low
- When the vehicle battery voltage
lowers
- When the vehicle voltage
exceeds the battery voltage rating
The BSD/RCTA will resume operation
once these conditions are corrected,
and the BSD/RCTA OFF indicator will
disappear. However, if the BSD/RCTA
OFF indicator appears for a prolonged
period of time, have the system
inspected at a SUBARU dealer as soon
as possible.
 The detectability of the radar
sensors is restricted. The BSD/RCTA
detection may be impaired and the
system may not operate properly
under the following conditions. - When the rear bumper around
the radar sensors is distorted
- When ice, snow or mud adheres
to the rear bumper surface around
the radar sensors
- When stickers, etc. are affixed on
the areas of the radar sensors on the
rear bumper
- During adverse weather condi-
tions such as rain, snow or fog
- When driving on wet roads such
as snow-covered roads and through
puddles 
The radar sensors may not detect or
may have difficulty detecting the
following vehicles and objects. - Small motorcycles, bicycles,
pedestrians, stationary objects on
the road or road side, etc.
- Vehicles with body shapes that
the radar may not reflect (vehicles
with lower body height such as a
trailer with no cargo and sports
cars)
- Vehicles that are not
approaching your vehicle even
though they are in the detection area
(either on a neighboring lane to the
rear or beside your vehicle when
reversing) (The system determines
the presence of approaching vehi-
cles based on data detected by the
radar sensors.)
- Vehicles traveling at signifi-
cantly different speeds
- Vehicles driving in parallel at
almost the same speed as your
vehicle for a prolonged time
- Oncoming vehicles
- Vehicles in a lane beyond the
neighboring lane
- Vehicles travelling at a signifi-
cantly lower speed that you are
trying to overtake
 On a road with extremely narrow
lanes, the system may detect vehicles
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BSD/RCTA (If Equipped)
274▼
System temporary stops due to
reduced radar sensitivity1) BSD/RCTA temporary stop messagedue to reduced radar sensitivity
2) BSD/RCTA OFF indicatorThis display appears when the detect-
ability of the radar sensors is reduced.
Once the condition is corrected, the
system will recover from the temporary
stop condition and the indicator will disap-
pear.
If the indicator remains displayed for a
prolonged time, have the system
inspected at a SUBARU dealer.
■
BSD/RCTA Warning Indi-
cator
▼
System malfunction1) BSD/RCTA malfunction message
2) BSD/RCTA warning indicatorThis display appears when a malfunction
occurs in the system. Contact a SUBARU
dealer and have the system inspected.
■
To Turn On/Off the BSD/
RCTABSD/RCTA OFF indicatorTo turn the BSD/RCTA system on and off,
operate the center information display.
Refer to "Car settings" P165.
When the BSD/RCTA system is turned
OFF, the BSD/RCTA OFF indicator on the
combination meter display (color TFT) will
illuminate.NOTE In the following cases, turn off the
BSD/RCTA system. The system may
not operate properly due to blocked
radar waves. - When towing the vehicle
1
2
702878
1
2
702879
702806
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BSD/RCTA (If Equipped)
276
Mexico-spec. models■
Handling of Radar SensorsRadar sensorsThe radar sensors, one on each side of
the vehicle, are mounted inside the rear
bumper.
702884
Certificado de homologacion:
RLVCOSR15-0442
Continental SRR3-A
Este equipo opera a titulo secundario,
consecuentemente, debe aceptar
interferencias perjudiciales incluyendo
equipos de la misma clase y puede no
causar interferencias a sistemas operando
a titulo primario.
702185702807
CAUTION
To ensure correct operation of the
BSD/RCTA, observe the following
precautions.Always keep the bumper surface
near the radar sensors clean.Do not affix any stickers or other
items on the bumper surface near
the radar sensors. For details,
consult your SUBARU dealer.Do not modify the bumper near
the radar sensors.Do not paint the bumper near the
radar sensors.
702808
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Reverse Automatic Braking (RAB) System (If Equipped)
277
Starting and Operating7
– CONTINUED –
NOTEIf the radar sensors require repair or
replacement, or the bumper area
around the radar sensors requires
repair, paintwork or replacement, con-
tact your SUBARU dealer for assis-
tance.
7-21. Reverse Automatic
Braking (RAB) System (If Equipped)Reverse Automatic Braking (RAB) is a
system designed to help avoid collisions
or reduce collision damage when
reversing the vehicle. If a wall or an
obstacle is detected in the reversing direc-
tion, the system will notify the driver with a
warning sound and may activate the
vehicle’s brakes automatically.
Do not expose the bumper near
the radar sensors to strong
impacts. If a sensor becomes
misaligned, a system malfunction
may occur, including the inability
to detect vehicles entering the
detection areas. If any strong
shock is applied to the bumper,
be sure to contact your SUBARU
dealer for inspection.Do not disassemble the radar
sensors.
WARNING
Reverse Automatic Braking
(RAB) is not a system intended to
replace the driver’s responsibility
to check their surroundings for
vehicles or obstacles to avoid a
collision.The driver is responsible for
driving safely. Before reversing,
be sure to first depress the brake
pedal and visually check the
surroundings.
There are some cases in which
the vehicle cannot avoid colli-
sion, because the system opera-
tion has limitations. The warning
sound or automatic braking may
be delayed or may not operate at
all even when an obstacle is
present.Make sure to set the Automatic
Braking to OFF when the vehicle
is on the free roller or on the
chassis dynamometer. Other-
wise, the vehicle may move and it
may cause an accident.Make sure to set the Automatic
Braking to OFF when towing the
vehicle. Otherwise, the vehicle
may move and it may cause an
accident.The system is not designed to
detect people (including chil-
dren), animals or other moving
objects.Depending on the vehicle condi-
tion or the surrounding environ-
ment, the sonar sensor’s ability
to detect objects may become
unstable.
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Reverse Automatic Braking (RAB) System (If Equipped)
278NOTEThe Reverse Automatic Braking (RAB)
system records and stores the follow-
ing data when automatic braking oper-
ates. It does not record conversations,
personal information or other audio
data.
Distance from the object
 Vehicle speed
 Accelerator pedal operation status
 Brake pedal operation status
 Select lever position
 Outside temperature
 The sensitivity setting of the sonar
sensors
SUBARU and third parties contracted
by SUBARU may acquire and use the
recorded data for the purpose of vehi-
cle research and development.
SUBARU and third parties contracted
by SUBARU will not disclose or pro-
vide the acquired data to any other
third party except under the following
conditions.
 The vehicle owner has given his/her
consent.
 The disclosure/provision is based
on a court order or other legally
enforceable request.
 Data that has been modified so that
the user and vehicle cannot be identi-
fied is provided to a research institu- tion for statistical processing or similar
purposes.
■
Reverse Automatic Braking
(RAB) System
Overview
The Reverse Automatic Braking (RAB)
system will operate t he following 2 func-
tions using 4 sonar sensors.
 Sonar Audible Alarm
The Reverse Automatic Braking (RAB)
system detects objects rearward and
warns the driver by warning message on
the center information display and
warning beeps.
 Automatic Braking
The automatic braking detects objects
rearward and if there is a high risk of a
collision, the system decelerates the
vehicle and controls the braking to reduce
damage.
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Reverse Automatic Braking (RAB) System (If Equipped)
2801) EyeSight warning indicator
2) RAB warning indicator
3) RAB OFF indicatorThe ignition switch is in the “ON” posi-
tion.
 The EyeSight warning indicator is off.
 The RAB warning indicator is off.
 The RAB OFF indicator is off.
 The select lever is in the “R” position.
Sonar Audible Alarm
 The sonar audible alarm is set to “ON”.
 The vehicle speed is from 0 to 9 mph (0
to 15 km/h).
Automatic Braking
 The automatic braking is set to “ON”.
 The vehicle speed is from 1 to 9 mph
(1.5 to 15 km/h).
NOTE In the following cases, the Reverse
Automatic Braking (RAB) system will
not operate. Promptly contact a
SUBARU dealer to have the system
inspected. - The EyeSight warning indicator
is illuminated.
- The RAB warning indicator is
illuminated.
 In the following cases, the Reverse
Automatic Braking (RAB) system
cannot be operated. - The RAB OFF indicator is illumi-
nated.
 In the following cases, the functions
may not be able to properly work.
Promptly contact a SUBARU dealer to
have the system inspected. - A sticker, paint, or a chemical is
applied to the sonar sensors or the
rear bumper near the sonar sensor.
- The rear bumper is modified.
- The rear bumper has been
removed and attached.
- The ground clearance is
changed due to the vehicle’s
loading condition or modification.
- There is damage to the sonar
sensors or the rear bumper near the
sonar sensor. - The rear bumper is exposed to
strong impact, or the rear bumper is
deformed.
 On a steep hill, the system’s auto-
matic braking ability will be reduced.
 The system is designed to avoid
collisions by automatic hard braking
when the vehicle’s reversing speed is
less than approximately 3 mph (5 km/
h). However, the system does not guar-
antee that the vehicle will be able to
avoid collisions in any situation.
 If the vehicle is reversed at an
extremely slow speed, the driver’s
operation may be prioritized. In this
case, automatic braking will not
operate.
 The system may not be able to
detect and apply the brake with the
following objects. - Sharp or thin objects such as
poles, fences and ropes which may
not reflect the sound wave emitted
from the sonar sensor.
- Objects that are too close to the
rear bumper when the select lever is
set to the “R” position.
- Objects with a surface which
may not reflect the sound wave
emitted from the sonar sensor such
as a chain link fence.
 Objects the system is not designed
to detect and apply brake.
3 1
2
702885
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Reverse Automatic Braking (RAB) System (If Equipped)
281
Starting and Operating7
– CONTINUED –
- Pedestrians.
- Moving objects including
moving vehicles.
- Objects which absorbs sound
waves such as cloth or snow.
- Objects whose surface has a
diagonal angle.
- Objects that are low to the
ground such as parking blocks.
- Objects that are high above the
ground such as objects hanging
from above.
- Objects that are out of range of
the center of the vehicle in the hori-
zontal direction.
- Objects that are not in a vertical
direction.
 When reversing the vehicle, the
functions may not be able to work
properly or may cause a system
malfunction if the following conditions
exist.
High frequency sound from other
sources are nearby:
- Horn sound from another
vehicle.
- Engine sound from other vehi-
cles.
- Sound of an air brake.
- Vehicle detection equipment or a
sonar from another vehicle. - A sound wave with a frequency
similar to the vehicle’s system is
transmitted near by.
- A vehicle equipped with the
same system is reversing toward
your reversing direction.
Weather conditions:
- Extremely high or extremely low
temperatures in which the area near
the sonar sensor becomes too hot
or too cold to operate.
- The sonar sensors or the rear
bumper near the sonar sensors are
exposed to heavy rain or a signifi-
cant amount of water.
- Fog, snow or sandstorm, etc.
- Air is moving rapidly such as
when a strong wind is blowing.
Parts attached to the rear bumper
near the sonar sensor:
- Commercial electr
onic parts (fog
light, fender pole, radio antenna) or
commercial attachment parts (trailer
hitch, bicycle carrier, bumper guard)
are attached.
- Parts that emit high frequency
sound, such as a horn or speaker,
are attached.
Vehicle conditions:
- Ice, snow or mud is adhered to
the sonar sensors or the rear
bumper near the sonar sensor. - The vehicle is significantly
inclined.
- The ground clearance is signifi-
cantly reduced due to the vehicle’s
loading condition, etc.
- When the sonar sensor is
misaligned due to a collision or an
accident.
Surrounding environment:
- A cloth banner, flag, hanging
branch or railroad crossing bars are
present in the reversing direction.
- When reversing on a gravel or
grassy area.
- When reversing in an area where
objects or walls are adjacent to the
vehicle such as narrow tunnels,
narrow bridges, narrow roads or
narrow garages.
- Wheel track or hole is present in
the ground of the reversing direc-
tion.
- When reversing over a drainage
cover (grating cover).
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Reverse Automatic Braking (RAB) System (If Equipped)
285
Starting and Operating7
– CONTINUED –
At this time, a warning message is also
displayed on the combination meter
display (color TFT).Depress brake pedal warning
1) Warning messageMake sure to depress the brake pedal
once the vehicle has been stopped by
automatic braking. Until the brake pedal is
depressed, a message will be displayed
on the center information display and the
continuous beep will remain sounding.
At this time, a warning message is also
displayed on the combination meter
display (color TFT).
NOTEThe sonar audible alarm and auto-
matic braking are different in opera-
tion conditions. Therefore there are
cases in which only one of these func-
tions will activate.
▼
After the vehicle is stopped by the
systemAfter the brake pedal is depressed, the
RAB OFF indicator will illuminate and the
system will temporarily stop operating.
The RAB OFF indicator will turn off when
the select lever is shifted to a position
other than the “R” position.
The system will operate again the next
time the select lever is shifted to the “R”
position.
NOTE
The Reverse Automatic Braking
(RAB) system will be disabled in the
following situations. - When 3 seconds pass after the
vehicle is stopped
- When any door is opened
- When the RAB warning indicator
is illuminated
- When the RAB OFF indicator is
illuminated
 The Reverse Automatic Braking
(RAB) system may stop operating
temporarily in the following cases and
the RAB OFF indicator will illuminate. - Ice, snow or mud is adhered to
the sonar sensors or the rear
bumper near the sonar sensor
- Objects are too close to the rear
bumper when the select lever is set
to the “R” position
- The system detects sounds of a
similar frequency to the RAB sonar
1
702891
WARNING
Depress the brake pedal immedi-
ately after the system stops the
vehicle by automatic braking.
Depending on the conditions of the
road surface and tires, the vehicle
may not remain stopped, possibly
leading to an accident.
702810
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Reverse Automatic Braking (RAB) System (If Equipped)
287
Starting and Operating7
Automatic Braking
For details, refer to "Car settings" P165.■
RAB Warning Indicator
If the Reverse Automatic Braking (RAB)
system malfunctions, the above indicator
illuminates on the combination meter.
Contact the nearest SUBARU dealer for
details.■
Handling of the Sonar
Sensors
The 4 sonar sensors are located in the
rear bumper. To ensure the proper opera-
tion of the Reverse Automatic Braking
(RAB) system, observe the following
precautions. 
Do not affix any stickers or other items
on the sonar sensor or the bumper
surface near the sonar sensors.
 Always keep the sonar sensor and the
rear bumper surface near the sonar
sensors clean.
 Do not modify rear bumper.
 Do not paint the bumper near the sonar
sensors.
 Do not apply high pressure water to the
sonar sensors with a high pressure car-
washing machine.
 Do not apply strong impacts to the rear
bumper near the sonar sensors. If a
sensor becomes misaligned, a system
malfunction may occur, including inability
to detect objects in the reversing direction.
If any strong impact is applied to the rear
bumper, contact a SUBARU dealer to
have the system inspected.
 Do not disassemble the sonar sensors.
NOTEIf the sonar sensors require repair or
replacement, or if the area of the rear
bumper near the sonar sensors
requires repair, paintwork or replace-
ment, contact your SUBARU dealer for
assistance.
702811
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