2020-2025 Subaru Outback SUV Starting and Operating -> 7-21. Reverse Automatic Braking (RAB) System (If Equipped) User Manual
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Starting and Operating -> 7-21. Reverse Automatic Braking (RAB) System (If Equipped) for Your Subaru Outback SUV Sixth Generation (2020-2025)

(418,1)
北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
NOTE
If the rear corner radars require repair
or replacement, or the bumper area
around the rear corner radars requires
repair, paintwork or replacement, con-
tact your SUBARU dealer for assis-
tance.
7-21. Reverse Automatic
Braking (RAB) System (If
Equipped)
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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 direction, the
system will notify the driver with a warning
sound and may activate the vehicle’s
brakes automatically.
WARNING
. Reverse Automatic Braking
(RAB) is not a system intended
to replace the driver’s responsi-
bility to check their surroundings
for vehicles or obstacles to avoid
a collision.
. The driver is responsible for driv-
ing 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 function 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 function to OFF when
towing a trailer. 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.
NOTE
The 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
Reverse Automatic Braking (RAB) System
416
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
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 provide
the acquired data to any other third
party except under the following con-
ditions.
. The vehicle owner has given his/her
consent.
. The disclosure/provision is based
on a court order or other legally en-
forceable request.
. Data that has been modified so that
the user and vehicle cannot be identi-
fied is provided to a research institution
for statistical processing or similar
purposes.
& Reverse Automatic Braking
(RAB) System Overview
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The Reverse Automatic Braking (RAB)
system will operate the 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 decelerates the
vehicle and controls the braking to reduce
damage.
– CONTINUED –
Reverse Automatic Braking (RAB) System
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7
Starting and Operating
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
1) When reversing
2) When either strong automatic braking 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)
! Detecting range
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1) Detecting range (width): Approximately 6
in (15 cm) outside of the vehicle width
2) Range that the system cannot detect:
Approximately 20 in (50 cm) behind the
rear of the vehicle
3) Detecting range (length): Approximately
5 ft (1.5 m) from the rear of the vehicle
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 re-
cognize 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
Reverse Automatic Braking (RAB) System
418
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
cancel the system, refer to “Cancel-
ing the Reverse Automatic Braking
(RAB) System Operation” �P425.
& Operating Conditions
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The Reverse Automatic Braking (RAB)
system will operate when all of the follow-
ing conditions are met.
1) EyeSight warning indicator
2) RAB warning indicator
3) RAB OFF indicator
. The ignition switch is in the “ON”
position.
. 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 Braking 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 can-
not be operated.
– The
(EyeSight Temporary Stop
indicator: White) is illuminated, and
the messages corresponding to the
EyeSight temporary stop are dis-
played on the combination meter
display (color LCD). For details,
refer to the Owner’s Manual supple-
ment for the EyeSight system.
– 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 re-
moved and attached.
– The ground clearance is changed
due to the vehicle’s loading condi-
tion 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 guaran-
tee 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
– CONTINUED –
Reverse Automatic Braking (RAB) System
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7
Starting and Operating
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
case, automatic braking will not oper-
ate.
. 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.
– 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
horizontal direction.
– Objects that are not perpendicu-
lar 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 mal-
function 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 electronic parts (fog
light, fender pole, radio antenna) or
commercial attachment parts (trai-
ler 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 bum-
per near the sonar sensor.
– The vehicle is significantly in-
clined.
– The ground clearance is signifi-
cantly reduced due to the vehicle’s
loading condition, etc.
– When the sonar sensor is mis-
aligned due to a collision or an
accident.
Surrounding environment:
– A cloth banner, flag, hanging
Reverse Automatic Braking (RAB) System
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
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.
– A curb or step is present in the
reversing direction.
– Reversing in a garage with a low
ceiling or a tunnel.
– There is a patch of snow rear-
ward.
– There is a puddle of water.
– 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 follow-
ing, it may not be possible to avoid a
collision even when the system oper-
ates normally.
– CONTINUED –
Reverse Automatic Braking (RAB) System
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7
Starting and Operating
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
– Roads are slippery.
– The tire air pressure is not cor-
rect.
– The tires have become worn.
– Tire chains are installed.
– Tires which are not the desig-
nated size are installed.
– Emergency repairs were per-
formed 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-
tion
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When 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.
NOTE
It may take time to display the wall and
sound warning beeps after the object
was recognized by the Sonar Audible
Alarm.
Guideline of detecting range
Alert level Range of detected object* Distance indicator Alarm pattern
Long proximity (ob-
ject 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
*: Range of detection may vary depending on the environmental condition.
Reverse Automatic Braking (RAB) System
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
! Obstacle detected and alert level
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Long proximity alert (object detected)
1) 35 in (90 cm) or more
Medium proximity alert (approaching the
object)
1) Yellow: 28 to 35 in (70 to 90 cm)
Short 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 rever-
sing direction, the range of detected object
will be shown on the center information
display.
A warning alarm will sound and, depend-
ing on the speed, either torque control to
generate engine braking or automatic
braking will be applied.
& Automatic Braking Function
Operation
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! Object close behind warning
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Automatic braking warning
1) Warning message
If 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
– CONTINUED –
Reverse Automatic Braking (RAB) System
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7
Starting and Operating
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
control will be applied to prevent collision.
At this time, a warning message is also
displayed on the combination meter dis-
play (color LCD).
Depress brake pedal warning
1) Warning message
Make 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 dis-
play (color LCD).
NOTE
The Sonar Audible Alarm function and
Automatic Braking function are differ-
ent in operation conditions. Therefore
there are cases in which only one of
these functions will activate.
WARNING
Depress the brake pedal immedi-
ately after the system stops the
vehicle by automatic braking. De-
pending on the conditions of the
road surface and tires, the vehicle
may not remain stopped, possibly
leading to an accident.
! After the vehicle is stopped by the
system
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After 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
. In the following cases, after the
vehicle has been stopped by the Re-
verse Automatic Braking (RAB) sys-
tem, brake control is released and the
electronic parking brake operates. For
details about releasing the parking
Reverse Automatic Braking (RAB) System
424
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
brake, refer to “Electronic Parking
Brake” �P388.
– When 2 minutes pass after the
vehicle is stopped
– When any door is opened
. The Reverse Automatic Braking
(RAB) system may stop operating tem-
porarily in the following cases and the
RAB OFF indicator will illuminate.
– Ice, snow or mud is adhered to
the sonar sensors or the rear bum-
per 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
& Canceling the Reverse Auto-
matic Braking (RAB) System
Operation
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The Reverse Automatic Braking (RAB)
system can be temporarily canceled by
any of the following operation.
. While the vehicle is stopped by the
operation of automatic braking, the brake
pedal is depressed.
. While the vehicle is stopped by the
operation of automatic braking, the accel-
erator pedal is depressed.
. The accelerator pedal is depressed
continuously (In this case, limited accel-
eration will be canceled and the vehicle will
continue reversing.)
. The select lever is shifted to a position
other than the “R” position.
NOTE
The system will be canceled if the
object is no longer detected.
& Reverse Automatic Braking
(RAB) System ON/OFF
Setting
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While the select lever is shifted to the “R”
position, the below functions of the Re-
verse Automatic Braking (RAB) system
can be set by operating the center in-
formation display.
1) ON setting key of Automatic Braking
function
2) OFF setting key of Automatic Braking
function
3) ON setting key of the Sonar Audible
Alarm function
4) OFF setting key of the Sonar Audible
Alarm function
When the ON setting key is shown, the
corresponding setting is ON.
Touch and hold the ON setting key to turn
the setting OFF.
When the OFF setting is shown, the
corresponding setting is OFF.
Touch and hold the OFF setting key to turn
the setting ON.
When the Automatic Braking function is
turned OFF, the following indicator(s) will
illuminate.
– CONTINUED –
Reverse Automatic Braking (RAB) System
425
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Starting and Operating
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
The RAB OFF indicator will turn off when
the corresponding function is turned ON.
NOTE
When the settings cannot be changed,
the ON/OFF setting key will be grayed
out.
Also, the following settings can be chan-
ged by operating the center information
display.
. Warning Volume
. Sonar Audible Alarm
For details, refer to “Car settings” �P226.
& RAB Warning Indicator
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1) RAB malfunction message
2) 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 Sen-
sors
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The 4 sonar sensors are located in the rear
bumper. To ensure the proper operation of
the Reverse Automatic Braking (RAB)
system, observe the following precau-
tions.
1) Outback
2) Subaru Outback Wilderness
3) Legacy
. Do not affix any stickers or other items
on the sonar sensor or the bumper surface
near the sonar sensors.
Reverse Automatic Braking (RAB) System
426
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北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
. 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 malfunc-
tion 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.
NOTE
If the sonar sensors require repair or
replacement, or if the area of the rear
bumper near the sonar sensors re-
quires repair, paintwork or replace-
ment, contact your SUBARU dealer for
assistance.
7-22. Driver Monitoring Sys-
tem (If Equipped)
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Driver Monitoring System is introduced as
DriverFocus in some countries.
The Driver Monitoring System monitors
possible cases when the driver is not
paying attention to the forward direction,
and also recognizes individual users.
This system warns the driver of inattentive/
drowsy driving, and can support safe and
comfortable driving by automatically re-
trieving the following settings.
– Driver’s position
– Climate control setting
– Meter setting
– Center information display setting
When a user is registered, various settings
are automatically retrieved when the user
enters the vehicle.
1) Camera
CAUTION
. Always use the utmost care in
driving
– Overconfidence because you
are driving a vehicle with the
Driver Monitoring System
could easily lead to a serious
accident.
. This system cannot detect if the
driver is feeling drowsy or is
concentrating on safe driving.
. It cannot judge if the driver is
awake or asleep, if their driving
abilities have diminished, or if
they are concentrating on safe
– CONTINUED –
Driver Monitoring System
427
7
Starting and Operating

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