SUBARU BRZ 2023 Owners Manual

BSD/RCTA (If Equipped)
275
Starting and Operating7
– CONTINUED –
following two conditions: (1) This device
may not cause harmful interference, and
(2) this device must accept any interfer-
ence received, including interference that
may cause undesired operation. 
Canada-spec. models
702883
702884
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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 moun ted inside the rear
bumper.
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.
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
 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.
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Reverse Automatic Braking (RAB) System (If Equipped)
277
Starting and Operating7
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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.
NOTEThe 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-
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. Otherwis e, 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)
278tion for statistical processing or similar
purposes.■ Reverse Automatic Braking
(RAB) System OverviewThe Reverse Automatic Braking (RAB)
system will operate th e following 2 func-
tions using 4 sonar sensors.
 Sonar Audible Alarm function
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 function
The Automatic Braking function detects
objects rearward and if there is a high risk
of a collision, the system de celerates the
vehicle and controls the braking to reduce
damage.
1) When reversing
2) When either strong automatic br aking or torque control is applied to prevent collision (in this
case, short warning beeps or continuous warning beeps will sound)
3) When the vehicle is stopped by the system (in this case, the continuous beep will remain
sounding)
4) Object (e.g., a wall)
702041
1
4
2 Object Close Behind
3 Apply Brake To Hold Position 4
4
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Reverse Automatic Braking (RAB) System (If Equipped)
279
Starting and Operating7
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■Operating ConditionsThe Reverse Automatic Braking (RAB)
system will operat e when all of the
following conditions are met.
1) 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 function
 The Sonar Audible Alarm is set to “ON”.
 The vehicle speed is from 0 to 9 mph (0
to 15 km/h).
Automatic Brak ing function
 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 ca ses, 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.
WARNING
If your vehicle is trapped on a rail-
road crossing and you are trying to
escape by reversing through the
crossing gate, the system may rec-
ognize the crossing gate as an
obstacle and brake may activate. In
this case, remain calm and either
continue to depress the accelerator
pedal or cancel the system. To can-
cel the system, refer to "Canceling
the Reverse Automatic Braking
(RAB) System Operation" P285.
3 1
2
702885
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Reverse Automatic Braking (RAB) System (If Equipped)
280
- 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 s ound 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. -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 perpendic-
ular to the ground.
- The surface of the object is
uneven or wavy.
 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.
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Reverse Automatic Braking (RAB) System (If Equipped)
281
Starting and Operating7
– CONTINUED –
- 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).
- The path of the reversing direc-
tion is inclined such as on a steep
uphill.
- When reversing downhill. - Reversing in a garage with a low

ceiling or a tunnel.
- A curb or step is present in the
reversing direction.
- There is a patch of snow rear-
ward.
- There is a puddle of water.
702035702036
702037702388
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Reverse Automatic Braking (RAB) System (If Equipped)
282
- There is an obstacle that is next
to an object.
- Going back along a wall.
- The area where the road starts
touching dirt and snow
- When reversing on an uneven
road.
 In circumstances such as the
following, it may not be possible to
avoid a collision even when the system
operates normally. - Roads are slippery.
- The tire air pressure is not
correct.
- The tires have become worn.
- Tire chains are installed.
- Tires which are not the desig-
nated size are installed.
- Emergency repairs were
performed using a puncture repair
kit.
- The suspension was modified.
- Vehicle driving is unstable due to
accident or malfunction.
- The brake warning light is illumi-
nated.
■ Sonar Audible Alarm func -
tionWhen Reverse Automatic Braking (RAB)
system is in operation, an audible warning
beeps will sound in 3 levels to warn the
driver of a potential collision.
NOTEIt may take time to display the wall and
sound warning beeps after the object
was recognized by the Sonar Audible
Alarm function.
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Reverse Automatic Braking (RAB) System (If Equipped)
283
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Starting and Operating7
Guideline of detecting range*: Range of detection may vary depending on the environmental condition.Alert level
Range of detected
object
*
Distance
indicator Alarm pattern
Long proximity (object detected) 35 in (90 cm) or more Green No warning sound
Medium proximity alert (approaching
the object) 28 to 35 in (70 to 90 cm) Yellow Short beeps
Short proximity alert (approaching
closer to the object) 20 to 28 in (50 to 70 cm) Orange Rapid short beeps
Closest proximity alert (too close to
the object) 20 in (50 cm) or less Red Continuous beep
▼
Obstacle detected and alert levelLong proximity alert (object detected)
1) Green: 35 in (90 cm) or more
Medium proximity alert (approaching the
object)
1) Yellow: 28 to 35 in (70 to 90 cm)
1
702886
1
702887
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Reverse Automatic Braking (RAB) System (If Equipped)
284Short proximity alert (approaching the
object closer)
1) Orange: 20 to 28 in (50 to 70 cm)
Closest proximity alert (too close to the
object)
1) Red: 20 in (50 cm) or less
When an object is detected in the
reversing direction, the range of detected
object will be shown on the center infor-
mation display.
A warning alarm will sound and,
depending on the speed, either torque
control to generate engine braking or
automatic braking will be applied.■ Automatic Braking function
Operation▼ Object close behind warningAutomatic braking warning
1) Warning messageIf the system determine the risk of collision
with the object. Short warning beeps or
continuous warning beeps will sound and either strong automatic braking or torque

control will be applied to prevent collision.
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. Un til 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).
1
702888
1
702889
1
702890
1
702891
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