Subaru WRX STI (2019 year). Instruction

(321,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Cruise control set indicator

At this time, the cruise control set indicator
appears in the combination meter.
The vehicle will maintain the desired
speed.

You can temporarily increase the vehicle
speed while driving with the cruise control
activated. Simply depress the accelerator
pedal to accelerate the vehicle. When you
release the accelerator pedal, the vehicle
will return to and maintain the previous
cruising speed.

NOTE

For CVT models, when you set the
desired speed while the Sport Sharp
(S#) mode is selected, the select lever/
gear position indicator will change
from the current gear position indica-

tion to the “D” indication.

To temporarily cancel the
cruise control

You can temporarily cancel the cruise
control in the following ways.

Press the “CANCEL” button.

Depress the brake pedal.

Depress the clutch pedal (MT models

only).

WARNING

For CVT models, you can cancel the
cruise control by shifting the select
lever into the “N” position. However,
do not shift the lever into the “N”
position while driving except in case
of emergency. If the select lever is

shifted into the “N” position, the
engine brake will no longer work.
This could result in an accident.

The cruise control set indicator in the
combination meter disappears when the
cruise control is canceled.

To resume the cruise control after it has
been temporarily canceled and with vehi-
cle speed of approximately 20 mph (30
km/h) or more, press the “RES/SET”
switch to the “RES” side to return to the
original cruising speed automatically.
The cruise control set indicator in the
combination meter will automatically ap-
pear at this time.

– CONTINUED –

Starting and operating/Cruise control

7-55

(322,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

To turn off the cruise control

There are two ways to turn off the cruise
control:
.

Press the cruise control main button

again.
.

Turn the ignition switch to the “ACC” or

“LOCK”/“OFF” position (but only when the
vehicle is completely stopped).

To change the cruising speed

To increase the speed (by the “RES/
SET” switch)

Press the “RES/SET” switch to the “RES”
side and hold it until the vehicle reaches
the desired speed. Then, release the
switch. The vehicle speed at that moment
will be memorized and treated as the new
set speed.

You can increase the set speed 1 mph (1.6
km/h) or 1 km/h (0.6 mph) each time by
pressing the “RES/SET” switch to the
“RES” side quickly.

To increase the speed (by accelera-
tor pedal)

1. Depress the accelerator pedal to ac-
celerate the vehicle to the desired speed.
2. Press the “RES/SET” switch to the
“SET” side once. Now the desired speed is
set and the vehicle will keep running at that
speed without depressing the accelerator
pedal.

NOTE

CVT models:
.

If you depress the accelerator pedal

with the Sport Sharp (S#) mode se-
lected, the select lever/gear position
indicator may change from the “D”
indication to the current gear position
indication.
.

If you depress the accelerator pedal

fully with the Intelligent (I) mode or the
Sport (S) mode selected, the transmis-
sion will operate like a conventional
automatic transmission.

To decrease the speed (by the “RES/
SET” switch)

Press the “RES/SET” switch to the “SET”
side and hold it until the vehicle reaches
the desired speed. Then, release the
switch. The vehicle speed at that moment
will be memorized and treated as the new
set speed.

You can lower the set speed 1 mph (1.6
km/h) or 1 km/h (0.6 mph) each time by
pressing the “RES/SET” switch to the
“SET” side quickly.

Starting and operating/Cruise control

7-56

(323,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

To decrease the speed (by brake
pedal)

1. Depress the brake pedal to release
cruise control temporarily.
2. When the speed decreases to the
desired speed, press the “RES/SET”
switch to the “SET” side once. Now the
desired speed is set and the vehicle will
keep running at that speed without depres-
sing the accelerator pedal.

Cruise control indicator

Refer to “Cruise control indicator” F3-35.

Cruise control set indicator

Refer to “Cruise control set indicator” F3-
35.

BSD/RCTA (if equipped)

The BSD/RCTA consists of rear radar 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.

WARNING

The driver is responsible for driving
safely. Always be sure to check the
surroundings with your eyes when
changing lanes or reversing the
vehicle.

The system is designed to assist the
driver in changing lanes or rever-
sing safely by monitoring the rear
and side areas of the vehicle. How-
ever, you cannot rely on this system
alone in assuring the safety during a
lane change or reversing. Overcon-
fidence 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 it may not operate
at all even when a vehicle is present

in a neighboring lane or approach-
ing from either side.

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 speed while driving the vehicle (Blind
Spot Detection)
.

To detect a vehicle approaching from

the right or left while reversing the vehicle
(Rear Cross Traffic Alert)

The system uses radar sensors for the
following features.

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” F7-64.

– CONTINUED –

Starting and operating/BSD/RCTA

7-57

(324,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Blind Spot Detection (BSD)

Operating range

The system warns the driver of dangers as
follows.
.

If the system detects vehicles in the

driver’s blind spots, the BSD/RCTA ap-
proach indicator light(s) on the outside
mirror(s) will illuminate.
.

If the driver operates the turn signal

lever to the side where the BSD/RCTA
approach indicator light is illuminated, the
corresponding BSD/RCTA approach indi-
cator light will flash.

Lane Change Assist (LCA)

Operating range

The system warns the driver of dangers as
follows.
.

If the system detects vehicles ap-

proaching at high speeds in the neighbor-
ing lanes, the BSD/RCTA approach indi-
cator light(s) on the outside mirror(s) will
illuminate.
.

If the driver operates the turn signal

lever to the side where the BSD/RCTA
approach indicator light is illuminated, the
corresponding BSD/RCTA approach indi-
cator light will flash.

Rear Cross Traffic Alert (RCTA)

Operating range

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 approach-
ing from either side while moving back-
ward, 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.

Starting and operating/BSD/RCTA

7-58

(325,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

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

Area out of detection range of the radar
sensors

Vehicle that may not be detected

Parked vehicle

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.

Example 2
1)

The detection range of the radar sensors

Vehicle that may be detected

NOTE

The system may detect that a vehicle
(C) is passing in front of your vehicle.
Always be sure to check the surround-
ings 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”

position.
.

The BSD/RCTA warning indicator and

BSD/RCTA OFF indicator are turned off.
.

The vehicle speed is 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 is on.

The vehicle speed is below 7 mph (12

km/h) even when the BSD/RCTA OFF
indicator remains off (except when rever-
sing).

NOTE

When a malfunction occurs in the

system (including the BSD/RCTA ap-
proach indicator light), the BSD/RCTA
will stop operating and the BSD/RCTA
warning indicator will appear.
.

If the BSD/RCTA warning indicator

appears, exercise proper caution. For
details, refer to “” F7-63.
.

In the following cases, the BSD/

– CONTINUED –

Starting and operating/BSD/RCTA

7-59

(326,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

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 or-
ientation 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 sur-
face around the radar sensors
– When the vehicle is driven on a
snow-covered road or in an envir-
onment in which there are no ob-
jects 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 ex-
ceeds the battery voltage rating

The BSD/RCTA will resume opera-
tion once these conditions are cor-
rected, and the BSD/RCTA OFF in-

dicator will disappear. However, if
the BSD/RCTA OFF indicator ap-
pears for a prolonged period of time,
have the system inspected at a
SUBARU dealer as soon as possible.

The detectability of the radar sen-

sors is restricted. The BSD/RCTA de-
tection 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 fol-
lowing vehicles and objects.

– Small motorcycles, bicycles, pe-
destrians, stationary objects on the
road or road side and etc.
– Vehicles with body shapes that
the radar may not reflect (vehicles

with lower 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 be-
side your vehicle when reversing)
(The system determines the pre-
sence of approaching vehicles
based on data detected by the radar
sensors.)
– Vehicles traveling at significantly
different speeds
– Vehicles driving in parallel at al-
most the same speed as your vehi-
cle 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
driving in a lane next to the neighboring
lane.
.

When the 7-inch audio/navigation

system is performing a software up-
date, the RCTA warning icons may not
be displayed on the audio/navigation
screen until the update is complete.

Starting and operating/BSD/RCTA

7-60

(327,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

BSD/RCTA approach indica-
tor light/warning buzzer

While the BSD/RCTA is active, the follow-
ing item(s) will operate to alert the driver:
.

The BSD/RCTA approach indicator

light (when there are vehicles in the
neighboring lanes).
.

The BSD/RCTA approach indicator

light and warning buzzer (when a vehicle
is approaching from the left or right side
while reversing)

BSD/RCTA approach indicator light

It is mounted on 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.
.

While the indicator light is illuminating, if

the turn signal lever is operated toward the
side in which this light turned on
.

When reversing the vehicle while the

system detects a vehicle approaching
from either side

BSD/RCTA approach indicator
light dimming function

When the headlights are on, the bright-
ness of the BSD/RCTA approach indicator
light will be reduced.

NOTE

You may have difficulty seeing the

BSD/RCTA approach indicator light
under the following conditions.

– When sunlight shines directly on
it
– When the headlight beams from a
vehicle traveling behind shines di-
rectly on it

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 brightness con-
trol” F3-72.

BSD/RCTA approach warning buz-
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.

You can change the setting of the warning
buzzer volume by operating the combina-
tion meter display (color LCD). For details,
refer to “BSD/RCTA” F3-43.

Safety tips regarding the BSD/RCTA
approach indicator light/warning
buzzer

In the following cases, operation of the

BSD/RCTA approach indicator light and
the warning buzzer may be delayed or the
system may fail to issue these warnings.

– When a vehicle moves to the neigh-
boring lane from a lane next to the
neighboring lane
– When you are driving on a steep
incline or on repeated sharp uphill and
downhill grades
– When you are 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-

– CONTINUED –

Starting and operating/BSD/RCTA

7-61

(328,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

hicles are approaching in a row
– In low radius bends (tight bends or
when making turns at an intersection)
– When there is a difference in height
between your lane and the neighboring
lane
– Immediately after the BSD/RCTA is
activated by pressing the BSD/RCTA
OFF switch
– Immediately after the shift lever/
select lever is shifted to the “R” position
– When extremely heavy cargo is
loaded in the trunk

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

The BSD/RCTA approach indicator

light may illuminate when driving close to
solid objects on the road or road side (such
as guardrails, tunnels and sidewalls).
.

The BSD/RCTA approach indicator

light may flash when turning at an inter-
section in urban areas or multilane inter-
sections.
.

The BSD/RCTA approach indicator

light may flash and the warning buzzer
may sound if a building or a wall is in the
reversing direction.
.

In the following cases, the system may

detect a vehicle driving two lanes away
from your vehicle.

– When your vehicle drives on the
near side of its lane from the corre-
sponding vehicle
– When the vehicle driving two lanes

away drives on the near side of its lane
from your vehicle

BSD/RCTA OFF indicator

System temporary stop indicator

This indicator 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 these conditions are corrected, the
system will recover from the temporary
stop condition and the indicator will dis-
appear.

Starting and operating/BSD/RCTA

7-62

(329,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

If the indicator remains displayed for a
prolonged time, have the system in-
spected at a SUBARU dealer.

System temporary stop indicator
due to reduced radar sensitivity

System temporary stop indicator due to
reduced radar sensitivity

This indicator 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 dis-
appear.

If the indicator remains displayed for a
prolonged time, have the system in-
spected at a SUBARU dealer.

BSD/RCTA warning indicator

System malfunction indicator

System malfunction indicator
1)

At first, this message will appear

Then this message will appear

This indicator appears when a malfunction
occurs in the system. Contact a SUBARU
dealer and have the system inspected.

BSD/RCTA OFF switch

BSD/RCTA OFF indicator

Press the BSD/RCTA OFF switch to
deactivate the BSD/RCTA. Then the
BSD/RCTA OFF indicator light will appear

– CONTINUED –

Starting and operating/BSD/RCTA

7-63

(330,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

on the combination meter display (color
LCD).
Press the switch again to activate the BSD/
RCTA. The BSD/RCTA OFF indicator
disappears.

NOTE

In the following cases, press the

BSD/RCTA OFF switch to deactivate
the system. The system may not oper-
ate properly due to blocked radar
waves.

– When a bicycle carrier or other
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

If you turn the ignition switch to the

“LOCK”/“OFF” position, the last known
status of the system is maintained. For
example, if you turn the ignition switch
to the “LOCK”/“OFF” position with the
BSD/RCTA deactivated, the BSD/RCTA
remains deactivated the next time you
turn the ignition switch to the “ON”
position.

Certification for the BSD/
RCTA

U.S.-spec. models

FCC ID: OAYSRR3A

CAUTION

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.

This device complies with part 15 of the
FCC Rules. Operation is subject to the
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

Starting and operating/BSD/RCTA

7-64

(331,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Mexico-spec. models

C e r t i f i c a d o

d e

h o m o l o g a c i o n :

RLVCOSR15-0442

Continental SRR3-A

ATTENTION:
Cofetel requires that their notice is printed
on the user manual in Spanish with the
exact words above.

If the user manual in Spanish does not
contain the notice it will not be accepted by
Cofetel and they will not grant NOM-121
certificate.

Moreover, it is important to tell your
customer that Cofetel inspectors are
checking the user manual in Spanish that
is included with the product. If the manual
does not contain Cofetel notice as above,

they will put a penalty to the importer and
distributor.

Handling of radar sensors

Radar sensors

The radar sensors, one on each side of the
vehicle, are mounted inside the rear
bumper.

– CONTINUED –

Starting and operating/BSD/RCTA

7-65

(332,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

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.

– 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 im-
pacts. If a sensor becomes mis-

aligned, 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.

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.

Reverse Automatic Braking
System (if equipped)

Reverse Automatic Braking 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 auto-
matically.

WARNING

Reverse Automatic Braking is not

a system intended to replace the
driver’s responsibility to check
surrounding areas for vehicles or
obstacles to avoid a collision.

The driver is responsible for driv-

ing safely. Always be sure to
check the surroundings visually
when reversing the vehicle.

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.

Starting and operating/Reverse Automatic Braking System

7-66

(333,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

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 Sys-
tem records and stores the following
data when automatic braking operates.
It does not record conversations, per-
sonal 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 con-
tracted by SUBARU may acquire
and use the recorded data for the
purpose of vehicle 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 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
identified is provided to a research
institution for statistical processing
or similar purposes.

Reverse Automatic Braking
System overview

The system detects objects using sonar
sensors installed in the rear bumper. If the
system determines a possible collision
with an object in the reversing direction,
automatic deceleration will be activated.
Also, beeping sounds will activate. If the
vehicle is further reversed, automatic hard
braking will be applied and a continuous
beeping sound will activate.

Detecting range

Detecting range (width): Approximately 6
in (15 cm) outside of the vehicle width

Range that the system cannot detect:
Approximately 20 in (50 cm) behind the
rear of the vehicle

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 the brakes may acti-
vate. In this case, remain calm and
either continue to depress the accel-
erator pedal or cancel the system. To

– CONTINUED –

Starting and operating/Reverse Automatic Braking System

7-67

(334,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

cancel the system, refer to “Cancel-
ing the Reverse Automatic Braking
system operation” F7-74.

Operating conditions

The Reverse Automatic Braking system
will operate when all of the following
conditions are met.

EyeSight warning indicator

RAB warning indicator

RAB OFF indicator

The ignition switch is in the “ON”

position
.

The EyeSight warning indicator is off

The RAB warning indicator is off

HALT (RAB OFF) indicator is off

The Reverse Automatic Braking sys-

tem is set to on
.

The select lever is in the “R” position

The vehicle speed is between 1 to 9

mph (1.5 to 15 km/h)

NOTE

When the Reverse Automatic Brak-

ing fail indicator is illuminated, the
Reverse Automatic Braking system
cannot be operated. Promptly contact
a SUBARU dealer to have the system
inspected.
.

When the Reverse Automatic Brak-

ing system OFF indicator is illumi-
nated, the Reverse Automatic Braking
system cannot be operated.
.

In the following cases, the system

may not be able to properly detect an
obstacle. 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 reattached
– The ground clearance is changed
due to the vehicle’s loading condi-
tion or modification
– Ice, snow or mud is adhered to
the sonar sensors or the rear bum-
per near the sonar sensor

– The rear bumper is exposed to
strong impact, or the rear bumper is
deformed

When the 7-inch audio/navigation

system is performing a software up-
date, the Reverse Automatic Braking
System may not display the following
items on the audio/navigation screen
until the update is complete.

– Display Icon on/off Function
– Distance Indicator Image
– Warning Message

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
case, automatic braking will not oper-
ate.
.

The system may not be able to detect

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

Starting and operating/Reverse Automatic Braking System

7-68

(335,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

– 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

– Pedestrians
– Moving objects including moving
vehicles
– Objects which absorb 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

The system may not be able to

properly detect objects or may cause
a system malfunction when the follow-
ing 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 nearby
– 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 is
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

– 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
branch or railroad crossing bars
are present in the reversing direc-
tion
– 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 tracks or a hole is present
in the ground of the reversing
direction
– When reversing over a drainage
cover (grate cover)

– CONTINUED –

Starting and operating/Reverse Automatic Braking System

7-69

(336,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

– The path of the reversing direc-
tion is inclined such as on a steep
uphill
– A curb is present in the reversing
direction
– When reversing downhill

– 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.

– 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.

Reverse Automatic Braking
System operation

When the Reverse Automatic Braking
System is in operation, the range between
the vehicle and the detected object will be
indicated on the multi-function display
(color LCD). Also, warning sounds will
activate in 3 levels to warn the driver of a
potential collision.
While the RAB is operating, a warning
message is displayed on the multi-function
display (color LCD) and the combination
meter display (color LCD).

Starting and operating/Reverse Automatic Braking System

7-70

Subaru WRX STI (2019 year). Instruction - part 20