2023 SUBARU BRZ ABS

Braking
244▼Braking when a tire is punctured
Do not depress the brake pedal suddenly
when a tire is punctured. This could cause
a loss of control of the vehicle. Keep
driving straight ahead while gradually
reducing speed. Then slowly pull off the
road to a safe place.■ Brake System▼ Two separate circuits
Your vehicle has a dual circuit brake
system. Each circuit works diagonally
across the vehicle. If one circuit of the
brake system should fail, the other half of
the system still works. If one circuit fails,
the brake pedal will go down much closer
to the floor than usual and you will need to
press it down much harder. And a much
longer distance will be needed to stop the
vehicle.
▼ Brake booster
The brake booster uses vacuum pump
system to assist brakin g force. Do not turn
off the engine while driving because that
will turn off the brake booster, resulting in
poor braking power.
The brakes will continue to work even
when the brake booster completely stops
functioning. If this happens, however, you
will have to depress the pedal much harder than normal and the braking

distance will increase.
▼ Supplemental booster function
when vacuum pressure fails
While the ignition switch is turned “ON”
and the engine is running, the supple-
mental booster function operates when
the brake booster performance is
decreased due to insufficient vacuum
boost.
When the brake pedal is depressed while
the supplemental booster function is oper-
ating, an operation sound and brake pedal
vibration may be generated. This is not a
malfunction.
▼ Brake assist system
Brake assist is a driver assistance system.
It assists the brake power when the driver
cannot depress the brake pedal strongly
and the brake power is insufficient.
Brake assist generates the brake power
according to the speed at which the driver
depresses the brake pedal.NOTEWhen you depress the brake pedal
strongly or suddenly, the following
phenomena occur. However, even
though these occur, they do not indi-
cate any malfunctions, and the brake
assist system is operating properly.
 You might feel that the brake pedal
is applied by lighter force and gener-
ates a greater braking force.
 You might hear the sound of ABS
operating from the engine compart-
ment.
WARNING
Do not be overconfident about the
brake assist. It is not a system that
brings more braking ability to the
vehicle beyond its braking capabil-
ity. Always use the utmost care
when driving regarding vehicle
speed and safe distance.
CAUTION
When you need to brake suddenly,
continue depressing the brake
pedal strongly to bring the effect of
the brake assist.
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ABS (Anti-Lock Brake System)
245
Starting and Operating7
■Disc Brake Pad Wear
Wa rning IndicatorsThe disc brake pad wear warning indica-
tors on the disc brakes give a warning
noise when the brake pads are worn.
If a squeaking or scraping noise is heard
from the disc brakes while braking, imme-
diately have your vehicle inspected by the
nearest SUBARU dealer.
7-11. ABS (Anti-Lock BrakeSystem)
The ABS prevents the lock-up of wheels
which may occur during sudden braking or
braking on slippery road surfaces. This
helps prevent the loss of steering control
and directional stability caused by wheel
lock-up.
When the ABS is operating, you may hear
a chattering noise or f eel a slight vibration
in the brake pedal. This is normal when
the ABS operates.■ ABS Self-CheckYou may feel a slight shock in the brake
pedal and hear the operating noise of the
ABS from the engine compartment just
after the vehicle is started. This is caused
by an automatic functional test of the ABS
being carried out and does not indicate
any abnormal condition.■ ABS Warning LightRefer to "ABS Warning Light" P140.
700040
WARNING
Always use the utmost care in driv-
ing – overconfidence because you
are driving with an ABS equipped
vehicle could easily lead to a seri-
ous accident.
CAUTION
 The ABS does not always
decrease stopping distance. You
should always maintain a safe
following distance from other
vehicles. When driving on badly surfaced
roads, gravel roads, icy road, or
over newly fallen snow, stopping
distances may be longer for a
vehicle with the ABS than one
without. When driving under
these conditions, therefore,
reduce your speed and leave
ample distance from other vehi-
cles.
 When you feel the ABS operating,
you should maintain constant
brake pedal pressure. Do not
pump the brake pedal since doing
so may defeat the operation of the
ABS.
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Electronic Brake Force Distribution (EBD) System
2467-12. Electronic Brake Force Distribution (EBD) SystemThe EBD system maximizes the effective-
ness of the brakes by allowing the rear
brakes to supply a greater proportion of
the braking force. It functions by adjusting
the distribution of braking force to the rear
wheels in accordance with the vehicle’s
loading condition and speed.
The EBD system is an in tegral part of the
ABS and uses some of the ABS compo-
nents to perform its function of optimizing
the distribution of braking force. If any of
the ABS components used by the EBD
function fails, the EBD system also stops
working.
When the EBD system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
and does not indicate a malfunction.
■ EBD System MalfunctionsIf a malfunction occurs in the EBD system,
the system stops working and the
following warning lights illuminate simulta-
neously.
 Brake system warning light
 ABS warning light
 Vehicle Stability Control (VSC)
warning light
If all the warning lights remain on even
though the parking brake is released, the
brake fluid level may be low or there could
be a problem with the EBD system. Park
the vehicle in a safe place immediately
and contact an SUBARU dealer.
702779
WARNING
 Driving with the brake system
warning light on is dangerous.
This indicates your brake system
may not be working properly. If
the light remains on, have the
brakes inspected by a SUBARU
dealer immediately. If at all in doubt about whether the
brakes are operating properly, do
not drive the vehicle. Have your
vehicle towed to the nearest
SUBARU dealer for repair.
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Vehicle Stability Control (VSC)/TRAC System
249
Starting and Operating7
– CONTINUED –
▼Disabling the TRAC System
If the vehicle gets stuck in mud, dirt or
snow, the TRAC system may reduce
power from the engine to the wheels.
Pressing the Vehicle Stability Control
(VSC) OFF switch to turn the system off
may make it easier for you to rock the
vehicle in order to free it. In this case, the
brake LSD function remains on. To turn
the TRAC system off, quickly press and
release the button. The TRAC OFF indi-
cator light will come on. Press the button
again to turn the system back on.
Creating adequate driving wheel slip by
deactivating the TRAC system may help
to recover from the loss of traction. Use
the Vehicle Stability Control (VSC) OFF
switch as necessary.
 A standing start on a steeply sloping
road with a snowy, gravel-covered, or
otherwise slippery surface
 Extrication of the vehicle when its
wheels are stuck in mud or deep snow ▼
Turning Off both Vehicle Stability
Control (VSC) and TRAC Systems
To turn the Vehicle Stability Control (VSC)
systems and TRAC system off, press and
hold the Vehicle Stability Control (VSC)
OFF switch for more than 3 seconds while
the vehicle is stopped. The TRAC OFF
indicator light and the Vehicle Stability
Control (VSC) OFF indicator light will
come on. However, on vehicles with an
automatic transmissi on, the brake LSD
function will remain on. Press the button
again to turn the systems back on. With
the Vehicle Stability Control (VSC) system
and TRAC system deactivated, traction
and stability enhancement offered by
Vehicle Stability Control (VSC) system
and TRAC system is unavailable. There-
fore you should not deactivate the Vehicle Stability Control (VSC) system and TRAC

system except under above-mentioned
situations.
NOTE When the switch has been pressed
to deactivate the Vehicle Stability
Control (VSC) system and TRAC
system, the Vehicle Stability Control
(VSC) system and TRAC system auto-
matically reactivates itself the next
time the ignition swit ch is turned to the
“OFF” position and the engine is
restarted.
 If the switch is held down for 30
seconds or longer, the indicator light
turns off, the Vehicle Stability Control
(VSC) system is activated, and the
system ignores any further pressing of
the switch. To make the switch usable
again, turn the ignition switch to the
“OFF” position and restart the engine.
 When the switch is pressed to deac-
tivate the Vehicle Stability Control
(VSC) system and TRAC system, the
vehicle’s running performance is
comparable with that of a vehicle that
does not have a Vehicle Stability
Control (VSC) system and TRAC
system. Do not deac tivate the Vehicle
Stability Control (VSC) system and
TRAC system except when absolutely
necessary.
702831
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Hill Start Assist System
259
Starting and Operating7
– CONTINUED –
NOTEIf you make an error when performing
any steps in the following procedure,
place the ignition switch in the “OFF”
position once and then start over
again.▼ To deactivate
1. Park your vehicle in a flat and safe
location and apply the parking brake.
2. Turn the ignition switch to the “OFF”
position.
3. Restart the engine. 4. Confirm the following items.
(1) The ABS warning light turns off.
(2) The brake system warning light
illuminates.
(3) The Vehicle Stability Control
(VSC) OFF indicator light turns off.
(4) TRAC OFF indicator light turns off.
5. Press and hold the Vehicle Stability
Control (VSC) OFF switch for 30 seconds
until the Vehicle Stability Control (VSC)
OFF indicator light on the combi-
nation meter turns on and off.
6. Within 5 seconds, release the Vehicle
Stability Control ( VSC) OFF switch.
7. Within 2 seconds, press back the
Vehicle Stability Control (VSC) OFF
switch. 
The Hill start assist i ndicator light turns on
and off. 8. Turn the ignition switch to the “OFF”

position. Hill start a ssist is deactivated.
NOTEWhen the Hill start assist system is
deactivated, the Hill start assist indica-
tor light turns off.
▼ To reactivate
To reactivate Hill start assist system,
repeat steps 1 to 8. When the Hill start
assist system is activa ted, the Hill start
assist indicator light illuminates.■ Hill Start Assist Indicator
LightRefer to "Hill Start A ssist Indicator Light"
 P150.
1 4
23
702784
702785
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BSD/RCTA (If Equipped)
274■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 a bicycle carrier or other
item is fitted to the rear of the
vehicle - When using a chassis dynamom-
eter or free roller device, etc.
- When running the engine and

making the wheels rotate while
lifting up the vehicle
 If the ignition switch is turned to the
“OFF” position, the last known status
of the system is maintained. For
example, if the ignition switch is turned
to the “OFF” position with the BSD/
RCTA deactivated, the BSD/RCTA
remains deactivated the next time the
ignition switch is turned to the “ON”
position.
■ Certification for the BSD/
RCTAThe U.S. and other FCC compliant
countries
FCC ID: OAYSRR3A
This device complies with part 15 of the
FCC Rules. Operation is subject to the
\b

\f
 


1
2
702879
702806
CAUTION
FCC WARNINGChanges or modifications not
expressly approved by the party
responsible for compliance could
void the user’s authority to operate
the equipment.
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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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Winter Driving
293
Driving Tips8
– CONTINUED –
8-8. Winter Driving■Operation during Cold
WeatherCarry some emergency equipment, such
as a window scraper, a bag of sand,
flares, a small shovel and jumper cables.
Check the battery and cables. Cold
temperatures reduce battery capacity.
The battery must be in good condition to
provide enough power for cold winter
starts.
It normally takes longer to start the engine
in very cold weather conditions. Use an
engine oil of a proper grade and viscosity
for cold weather. Using heavy summer oil
will make it harder to start the engine.
Keep the door locks from freezing by
squirting them with deicer or glycerin.
Forcing a frozen door open may damage
or separate the rubber weather strips
around the door. If the door is frozen, use
hot water to melt the ice, and afterwards
thoroughly wipe the water away.
Use a windshield washer fluid that
contains an antifr eeze solution. Do not
use engine antifreeze or other substitutes
because they may damage the paint of
the vehicle.
If you fill the windshield washer tank with
a fluid with a different concentration from
If all four tires are not the same in
items (a) to (h), serious mechani-
cal damage could be caused to
the drivetrain of the car, and
affect the followings.-Ride-Handling- Braking- Speedometer/Odometer cali-
bration- Clearance between the body
and the tires
It also may be dangerous and
lead to loss of vehicle control,
and it can lead to an accident.
 In a rollover crash, an unbelted
person is significantly more likely
to die than a person wearing a
seat belt. The driver and all your
passengers should fasten their
seatbelts before st arting to drive
in order to minimize the chance of
serious injury or death. Do not make sharp turns or quick
maneuvers unless absolutely
unavoidable. Such actions are
dangerous as you may lose
control, possibly resulting in a
rollover which could cause death
or serious injury.
 Whenever strong crosswinds are
present, slow do wn sufficiently to
maintain control of your vehicle. Never to drive through pools and
puddles, or roads flooded with
water. Water entering the engine
air intake or the exhaust pipe or
water splashing onto electrical
parts may damage your vehicle
and may cause it to stall. In this
case, contact your SUBARU
dealer immediat ely. Regardless
of its depth, it can wash away the
ground from under your tires,
resulting in possible loss of trac-
tion and even vehicle rollover.
CAUTION
After driving on gravel roads or
rough roads, check the undercar-
riage of the vehicle body for any
damage, deformation, or paint
removal. If you notice any irregulari-
ties, contact a SUBARU dealer for
an inspection as soon as possible.
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