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EnglishStarting and operating -> BSD/RCTA for your Subaru Forester 2019-2024
BSD/RCTA
358
.
.
While the Vehicle Dynamics Control
warning light is illuminated. Refer to
“Vehicle Dynamics Control warning
light/Vehicle Dynamics Control opera-
tion indicator light” �P181.
While the Auto Start Stop warning light
is illuminated. Refer to “Auto Start Stop
warning light/Auto Start Stop OFF
indicator light (yellow)” �P190.
7-19. BSD/RCTA (if equipped)
The BSD/RCTA consists of rear corner
radars with Blind Spot Detection and Rear
Cross Traffic Alert.
These functions enable the system to
detect objects or vehicles to the rear,
drawing attention to the driver when
changing a lane or when driving in reverse.
When using the Hill start assist system, a
braking effect may be felt even after the
brake pedal has been released.
WARNING
The driver is responsible for driving
safely. Always be sure to check the
surroundings when changing lanes
or reversing the vehicle.
CAUTION
The braking power of the Hill start
assist system may not be sufficient
when strong braking power is
needed (e.g., when towing a trailer).
The system is designed to assist the
driver to change lanes or reverse
safely by monitoring the rear and
side areas of the vehicle. However,
you cannot rely on this system alone
in assuring the safety during a lane
change or reversing. Overconfi-
dence in this system could result in
an accident and lead to serious
injury or death. Since the system
operation has various limitations,
the flashing or illumination of the
BSD/RCTA approach indicator light
may be delayed or the warning
buzzer may be delayed or inopera-
NOTE
A slight jolt may be felt when the
vehicle begins to move forward after
being reversed.
.
.
.
.
When starting backward facing uphill
When starting forward facing downhill
While the parking brake is applied
While the ignition switch is in the “ACC”
or “LOCK”/“OFF” position
BSD/RCTA 359
tive, even if there is a vehicle travel-
ing in a neighboring lane or ap-
proaching your vehicle from either
side.
! Blind Spot Detection (BSD)
The driver is responsible for paying
attention to the rear and side areas
of the vehicle.
& System features
BSD/RCTA consists of the following func-
tions.
.
.
To detect a vehicle in a blind spot on an
adjacent lane or a vehicle approaching
at high speeds (Blind Spot Detection).
To detect a vehicle approaching from
the right or left while reversing the
vehicle (Rear Cross Traffic Alert).
BSD/RCTA approach indicator light
.
If the driver operates the turn signal
lever in the direction which the BSD/
RCTA approach indicator light is illumi-
nating, the corresponding BSD/RCTA
approach indicator light will flash.
1
Operating range
The system warns the driver of dangers as
follows.
.
If the system detects a vehicle in the
blind spot, the BSD/RCTA approach
indicator light(s) on the outside mirror
(s) will illuminate.
The system uses radar sensors for the
above functions.
NOTE
The BSD/RCTA radar sensor has been
certified by the radio wave related laws
of the U.S. and Canada. When driving in
other countries, certification of the
country where the vehicle is driven
must be obtained. For certification in
the U.S. and Canada, refer to “Certifica-
tion for the BSD/RCTA” �P366.
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BSD/RCTA
360
! Lane Change Assist (LCA)
! Limitations of the detectability of
! Rear Cross Traffic Alert (RCTA)
RCTA
Since the detectability of RCTA is limited,
the RCTA may not operate properly in
angled parking.
1
Operating range
1
Operating range
The system warns the driver of dangers as
follows.
The system notifies the driver of another
vehicle approaching from either side when
driving in reverse. This feature helps the
driver check the rear and side areas of the
vehicle when moving backward.
.
If the system detects a vehicle ap-
proaching at a high speed in the
neighboring lanes, the BSD/RCTA ap-
proach indicator light(s) on the outside
mirror(s) will illuminate.
Example 1
1
2
The detection range of the radar sensors
Area out of detection range of the radar
sensors
If the system detects a vehicle approach-
ing from either side while moving back-
ward, it warns the driver of dangers in the
following way.
A
B
Vehicle that may not be detected.
Parked vehicle
.
If the driver operates the turn signal
lever in the direction which the BSD/
RCTA approach indicator light is illumi-
nating, the corresponding BSD/RCTA
approach indicator light will flash.
WARNING
.
The BSD/RCTA approach indicator
light(s) on the outside mirror(s) flashes.
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 when reversing the
.
.
A warning buzzer sounds.
An icon appears on the rear view
camera screen (audio/navigation moni-
tor)
BSD/RCTA 361
possible.
vehicle.
& System operation
– When a malfunction occurs in the
system, including the BSD/RCTA
approach indicator light.
In the following cases, the BSD/
RCTA will temporarily stop operat-
ing (or may stop operating) and the
BSD/RCTA OFF indicator light will
appear.
! Operating conditions
The BSD/RCTA will operate when all of the
following conditions are met.
.
.
The ignition switch is in the “ON”
position.
.
The BSD/RCTA warning light and BSD/
RCTA OFF indicator light are turned off.
– When the radar sensor becomes
significantly misaligned (If the
orientation of the radar sensor is
shifted for any reason, readjust-
ment 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 sen-
sors.
– When the vehicle is driven on a
snow-covered road or in an en-
vironment in which there are no
objects around (such as in a
desert) for a long time.
.
.
The EyeSight warning indicator is off.
The vehicle is driven at speeds above 7
mph (12 km/h) (except when rever-
sing).
The select lever is in the “R” position
(when reversing).
.
Example 2
1
C
The detection range of the radar sensors
Vehicle that may be detected.
The BSD/RCTA will not operate in the
following situations.
.
The BSD/RCTA OFF indicator light is
on.
The vehicle speed is below 6 mph (10
km/h) even when the BSD/RCTA OFF
indicator light remains off (except when
reversing).
NOTE
The system may detect that a vehicle
(C) is passing in front of your vehicle.
Always be sure to check the surround-
ings when reversing the vehicle.
.
– When the temperature around the
radar sensors increased exces-
sively due to long driving on
uphill grades in summer, etc.
– When the temperature around the
radar sensors becomes extre-
mely low.
NOTE
.
In the following case, the BSD/RCTA
will stop operating and the BSD/
RCTA warning light will appear. If
the BSD/RCTA warning light ap-
pears, have your vehicle inspected
at a SUBARU dealer as soon as
– When the vehicle battery voltage
– CONTINUED –
BSD/RCTA
362
lowers.
following.
neighboring lane.
.
When the 8-inch audio/navigation
system is performing a software
update, the RCTA warning icons
may not be displayed on the audio/
navigation screen until the update is
complete.
– When an overvoltage occurs in
the vehicle battery.
– Small motorcycles, bicycles, pe-
destrians, stationary objects on
the road or road side, etc.
– Vehicles with body shapes that
the radar may not reflect (vehi-
cles with a low body height such
as sports cars or a trailer with no
cargo).
– 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 deter-
mines the presence of approach-
ing vehicles based on data de-
tected by the radar sensors.)
– Vehicles traveling at significantly
different speeds
– Vehicles driving parallel to your
vehicle at almost the same speed
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 vehi-
cles driving in a lane next to the
When the above conditions are cor-
rected, the BSD/RCTA will resume
operation and the BSD/RCTA OFF
indicator light will disappear. How-
ever, if the BSD/RCTA OFF indicator
light has appeared for a prolonged
time, have the system inspected at a
SUBARU dealer as soon as possible.
& BSD/RCTA approach indica-
tor light/warning buzzer
When the BSD/RCTA is active, the BSD/
RCTA approach indicator light will operate
to alert the driver when there are vehicles
in the neighboring lanes. When reversing
the vehicle, the BSD/RCTA approach
indicator light and warning buzzer will
operate to alert the driver that a vehicle is
approaching from the left or right side.
.
The detectability of the radar sen-
sors 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 or
through puddles
.
.
The radar sensors may not detect or
may have difficulty detecting the
BSD/RCTA 363
details, refer to “Menu screens” �P199.
! BSD/RCTA approach indicator
! BSD/RCTA approach indicator light
light dimming function
! Safety tips regarding the BSD/RCTA
approach indicator light/warning
buzzer
When the headlights are turned on, the
brightness of the BSD/RCTA approach
indicator light will be reduced.
.
In the following cases, operation of the
BSD/RCTA approach indicator light
and the warning buzzer may be de-
layed or the system may fail to issue
these warnings.
NOTE
.
You may have difficulty recognizing
the BSD/RCTA approach indicator
light under the following conditions.
– When affected by direct sunlight
– When affected by the headlight
beams from the vehicles behind
While the illumination brightness
control dial is in the fully upward
position, even if the headlights are
turned on, the brightness of the
BSD/RCTA approach indicator light
will not be reduced. For details about
the illumination brightness control
dial, refer to “Illumination bright-
ness control” �P167.
– When a vehicle moves to the neigh-
boring lane from a lane next to the
neighboring lane.
– When driving on a steep incline or
on repeated sharp uphill and down-
hill grades
– When going beyond a pass
– When both your vehicle and a
vehicle driving on a neighboring
lane are driving on the far side of
each lane.
– When several narrowly-spaced ve-
hicles are approaching in a row.
– In low radius bends (tight bends or
when making turns at an intersec-
tion)
.
BSD/RCTA approach indicator light
It is mounted in each side of the outside
mirrors.
The indicator light will illuminate when a
vehicle approaching from behind is de-
tected.
The indicator light will flash to warn the
driver of dangers under the following
conditions.
! BSD/RCTA approach warning buz-
.
While the indicator light illuminates, if
you operate the turn signal lever toward
the side in which this light turned on.
zer (only when reversing)
A warning buzzer sounds along with
flashing of the BSD/RCTA approach in-
dicator light to warn the driver of dangers.
– When there is a difference in height
between your lane and the neigh-
boring lane.
– Immediately after the BSD/RCTA is
activated by pressing the BSD/
RCTA OFF switch.
.
When reversing the vehicle while the
system detects a vehicle approaching
from either side.
The setting of the warning buzzer volume
can be changed by operating the combi-
nation meter display (color LCD). For
– CONTINUED –
BSD/RCTA
364
– Immediately after the select lever is
shifted to the “R” position.
– When extremely heavy cargo is
loaded in the cargo area.
to solid objects on the road or road side
(such as guardrails, tunnels or side-
walls).
The BSD/RCTA approach indicator
light may flash when turning at an
intersection in urban areas or a multi-
lane intersection.
The BSD/RCTA approach indicator
light may flash and the warning buzzer
may sound if a building or a wall exists
in the reversing direction.
In the following cases, the system may
detect a vehicle driving two lanes away
from your vehicle.
– When you are driving on the near
side of the lane of the corresponding
vehicle.
– When the vehicle driving two lanes
away is driving on the near side of its
lane from your vehicle.
& BSD/RCTA OFF indicator
light
! System temporary stop
.
.
.
.
During reversing, operation of the BSD/
RCTA approach indicator light and the
warning buzzer may be delayed or the
system may fail to issue these warnings
under the following conditions.
– When backing out of an angled
parking space
– When a large-sized vehicle is
parked next to your vehicle. (That
vehicle prevents the propagation of
radar waves.)
– When reversing on sloped roads
– When reversing at a high speed
1
2
BSD/RCTA temporary stop message
BSD/RCTA OFF indicator light
This display appears when the system is
used under the following conditions.
.
.
Extremely high or low temperatures
When abnormal voltage exists for the
vehicle battery.
.
When the radar sensor is significantly
misaligned.
Once the above conditions are corrected,
the system will recover from the temporary
stop condition and the indicator will dis-
appear. If the indicator remains displayed
for a prolonged time, have the system
.
The BSD/RCTA approach indicator
light may illuminate when driving close
BSD/RCTA 365
inspected at a SUBARU dealer.
& BSD/RCTA warning light
& BSD/RCTA OFF switch
! System temporary stop due to re-
! System malfunction
duced radar sensitivity
BSD/RCTA OFF switch
1
2
3
4
BSD/RCTA malfunction message
At first, this message will appear
Then this message will appear
BSD/RCTA warning light
1
2
BSD/RCTA temporary stop message due
to reduced radar sensitivity
BSD/RCTA OFF indicator light
This display appears when the detectabil-
ity of the radar sensors is reduced. Once
the condition is corrected, the system will
recover from the temporary stop condition
and the indicator will disappear. If the
indicator remains displayed for a pro-
longed time, have the system inspected
at a SUBARU dealer.
This display appears when a malfunction
occurs in the system. Contact a SUBARU
dealer and have the system inspected.
BSD/RCTA OFF indicator light
If the BSD/RCTA OFF switch is pressed,
the BSD/RCTA OFF indicator light ap-
pears on the combination meter, and the
– CONTINUED –
BSD/RCTA
366
BSD/RCTA is deactivated.
ignition switch is turned to the “ON”
position.
! Canada-spec. models
Press the switch again to activate the BSD/
RCTA. The BSD/RCTA OFF indicator light
will disappear.
When this occurs, the BSD/RCTA ap-
proach indicator light on the side of the
rearview mirror illuminates for a few
seconds and then turns off.
& Certification for the BSD/
RCTA
! U.S.-spec. models
FCC ID: OAYSRR3A
NOTE
CAUTION
.
In the following cases, the system
may not operate properly due to
blocked radar waves. Press the
BSD/RCTA OFF switch to deactivate
the system.
FCC WARNING
Changes or modifications not ex-
pressly approved by the party re-
sponsible for compliance could void
the user’s authority to operate the
equipment.
– When towing a load.
– When a bicycle carrier or other
carrier item is fitted to the rear of
the vehicle.
– When using a chassis dynam-
ometer or free roller device, etc.
– When running the engine and
making the wheels rotate while
lifting up the vehicle
NOTE
This device complies with part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) This de-
vice may not cause harmful interfer-
ence, and (2) this device must accept
any interference received, including
interference that may cause undesired
operation.
.
If the ignition switch is turned to the
“LOCK”/“OFF” position, the last
known status of the system is main-
tained. For example, if the ignition
switch is turned to the “LOCK”/
“OFF” position with the BSD/RCTA
deactivated, the BSD/RCTA will re-
main deactivated the next time the
BSD/RCTA 367
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 in-
spection.
& Handling of radar sensors
.
Do not disassemble the radar sensors.
NOTE
If 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.
1
Sensors
The radar sensors, one on each side of the
vehicle, are mounted inside the rear
bumper.
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.
.
.
.
Do not modify the bumper near the
radar sensors.
Do not paint the bumper near the radar
sensors.
Do not expose the bumper near the
radar sensors to strong impacts. If a
