brake SUBARU BRZ 2022 Workshop Manual

Reverse Automatic Braking (RAB) System (If Equipped)
281
Starting and Operating7
– CONTINUED –
- 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 in a vertical
direction.
 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. - 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).
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Reverse Automatic Braking (RAB) System (If Equipped)
282
- 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. - 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
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.
702035702036
702037702388
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Reverse Automatic Braking (RAB) System (If Equipped)
285
Starting and Operating7
– CONTINUED –
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. 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
display (color TFT).
NOTEThe sonar audible alarm and auto-
matic braking are different in opera-
tion conditions. Therefore there are
cases in which only one of these func-
tions will activate.
▼
After the vehicle is stopped by the
systemAfter 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
The Reverse Automatic Braking
(RAB) system will be disabled in the
following situations. - When 3 seconds pass after the
vehicle is stopped
- When any door is opened
- When the RAB warning indicator
is illuminated
- When the RAB OFF indicator is
illuminated
 The Reverse Automatic Braking
(RAB) system may stop operating
temporarily in the following cases and
the RAB OFF indicator will illuminate. - Ice, snow or mud is adhered to
the sonar sensors or the rear
bumper 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
1
702891
WARNING
Depress the brake pedal immedi-
ately after the system stops the
vehicle by automatic braking.
Depending on the conditions of the
road surface and tires, the vehicle
may not remain stopped, possibly
leading to an accident.
702810
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Reverse Automatic Braking (RAB) System (If Equipped)
286
- When the TRAC mode and
Vehicle Stability Control (VSC)
mode are turned off
- When in TRACK mode and the
Pre-Collision Braking System has
been turned off
■
Canceling the Reverse Auto-
matic Braking (RAB) Sy stem
Operatio n
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 automati c 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 acceler-
ation will be canceled and the vehicle will
continue reversing.)
 The select lever is shifted to a position
other than the “R” position.NOTEThe system will be canceled if the
object is no longer detected.
■
Reverse Automatic Braking
(RAB) System ON/OFF
Setting
While the select lever is shifted to the “R”
position, the below functions of the
Reverse Automatic Braking (RAB) system
can be set by operating the center infor-
mation display.1) ON setting key of automatic braking
2) OFF setting key of automatic braking
3) ON setting key of the sonar audible alarm
4) OFF setting key of the sonar audible alarmWhen 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 corre-
sponding setting is OFF.
Touch and hold the OFF setting key to
turn the setting ON.
When the automatic braking are turned
OFF, the following indicator(s) will illumi-
nate.
The RAB OFF indicator will turn off when
the corresponding function is turned ON.
NOTEWhen the settings cannot be changed,
the ON/OFF setting key will be grayed
out.
Also, the following settings can be
changed by operating the center informa-
tion display.

Warning volume
 Sonar audible alarm
12
34
702892
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New Vehicle Break-In Driving – the First 1,000 miles (1,600 km)
2908-1. New Vehicle Break-In
Driving – the First 1,000 miles(1,600 km)The performance and long life of your
vehicle are dependent on how you handle
and care for your vehicle while it is new.
Follow these instructions during the first
1,000 miles (1,600 km):
Do not race the engine. And do not
allow engine speed to exceed 4,000 rpm
except in an emergency.
 Do not drive at one constant engine or
vehicle speed for a long time, either fast or
slow.
 Avoid starting suddenly and rapid
acceleration, except in an emergency.
 Avoid hard braking, except in an emer-
gency.
The same break-in procedures should be
applied to a newly installed or overhauled
engine or when brake pads are replaced
with new ones.
8-2. Fuel Economy HintsThe following suggestions will help to
save your fuel.
 Select the proper gear position for the
speed and road conditions.
 Avoid sudden acceleration or decelera-
tion. Always accelerate gently until you
reach the desired speed. Then try to main-
tain that speed for as long as possible.
 Do not pump the accelerator and avoid
racing the engine.
 Avoid unnecessary engine idling.
 Keep the engine properly tuned.
 Keep the tires inflated to the correct
pressure shown on the tire inflation pres-
sure label, which is located on the driver’s
center pillar. Low pressure will increase
tire wear and fuel consumption.
 Use the air conditioner only when
necessary.
 Keep the front and rear wheels in
proper alignment.
 Avoid carrying unnecessary luggage or
cargo.
8-3. Engine Exhaust Gas(Carbon Monoxide)
WARNING
 Never inhale engine exhaust gas.
Engine exhaust gas contains
carbon monoxide, a colorless
and odorless gas which is
dangerous, or even lethal, if
inhaled.Always properly maintain the
engine exhaust system to prevent
engine exhaust gas from entering
the vehicle.Never run the engine in a closed
space, such as a garage, except
for the brief time needed to drive
the vehicle in or out of it. Avoid remaining in a parked
vehicle for a long time while the
engine is running. If that is
unavoidable, then use the ventila-
tion fan to force fresh air into the
vehicle.Always keep the front ventilator
inlet grille free from snow, leaves
or other obstructions to ensure
that the ventilation system
always works properly.
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Winter Driving
294the one used previously, purge the old
fluid from the piping between the wind-
shield washer tank and washer nozzles by
operating the washer for a certain period
of time. Otherwise, if the concentration of
the fluid remaining in the piping is too low
for the outside temperature, it may freeze
and block the nozzles.▼
Before driving your vehicle
Before entering the vehicle, remove any
snow or ice from your shoes because that
could make the pedals slippery and
driving dangerous.
While warming up the vehicle before
driving, check that the accelerator pedal,
brake pedal, and all other controls operate
smoothly.
Clear away ice and snow that has accu-
mulated under the fenders to avoid
making steering difficult. During severe
winter driving, stop when and where it is
safe to do so and check under the fenders
periodically.
▼Parking in cold weather
CAUTION
 Adjust the washer fluid concen-
tration appropriately for the
outside temperature. If the
concentration is inappropriate,
sprayed washer fluid may freeze
on the windshield and obstruct
your view, and the fluid may
freeze in the windshield washer
tank.State or local regulations on vola-
tile organic compounds may
restrict the use of methanol, a
common windshield washer anti-
freeze additive. Washer fluids
containing non-methanol anti-
freeze agents should be used
only if they provide cold weather
protection without damaging
your vehicle’s paint, wiper blades
or washer system.
WARNING
Snow can trap dangerous exhaust
gases under your vehicle. Keep
snow clear of the exhaust pipe and
from around your vehicle if you
park the vehicle in snow with the
engine running.
CAUTION
Do not use the parking brake
when parking for long periods in
cold weather since it could freeze
in that position.When the vehicle is parked in
snow or when it snows, raise the
wiper blades off the glass to
prevent damage to them.Under either of the following
conditions, icing may develop on
the brake system, which could
cause poor braking action.
- When the vehicle has been left
parked after use on roads
heavily covered with snow- When the vehicle has been leftparked during a snowstormCheck for snow or ice buildup on
the suspension, disc brakes and
brake hoses underneath the vehi-
cle. If there is caked snow or ice,
remove it, being careful not to
damage the disc brakes and
brake hoses and ABS harness.
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Winter Driving
295
Driving Tips8
– CONTINUED –
When parking for long periods in cold
weather, you should observe the following
tips.
1. For MT models, place the shift lever in
the “1” or “R” position. For AT models,
place the select lever in the “P” position.
2. Use tire stops under the tires to
prevent the vehicle from moving.
▼
Refueling in cold weather
To help prevent moisture from forming in
the fuel system and t he risk of its freezing,
use of an antifreeze additive in the fuel
tank is recommended during cold
weather.
Use only additives that are specifically
designed for this purpose. When an anti-
freeze additive is used, its effect lasts
longer if the tank is refilled whenever the
fuel level reaches half empty.
If your SUBARU is not going to be used for
an extended period, it is best to have the
fuel tank filled to capacity.
■
Driving on Snowy and Icy
Roads
To prevent skidding and slipping, avoid
sudden braking, abrupt acceleration, high-
speed driving, and sharp turning when
driving on snowy or icy roads.
Always maintain ample distance between
your vehicle and the vehicle ahead of you
to avoid the need for sudden braking.
To supplement the foot brake, use the
engine brake effectively to control the
vehicle speed. (Shift into a lower gear
when necessary.) Avoid shifting down abruptly. Such
behavior can cause the wheels to lock,
possibly leading to loss of vehicle control.
An anti-lock brake system (ABS)
enhances your vehicle’s braking perfor-
mance on snowy and icy roads. For infor-
mation about braking on slippery
surfaces, refer to "ABS (Anti-Lock Brake
System)"
P245 and "Vehicle Stability
Control (VSC)/TRAC System" P247.
For AT models, use the Snow mode when
driving on snowy or icy roads. For details
about how to use the mode, refer to
"Driving Mode Select Switch (If
Equipped)"  P241.
▼
Wiper operation when snowing
Before driving in cold weather, make sure
the wiper blade rubbers are not frozen to
the windshield.
If the wiper blade rubbers are frozen to the
windshield, use the defroster with the
airflow selection in “ ” and the tempera-
ture set for maximum warmth until the
wiper blade rubbers are completely
thawed. Refer to "Cli mate Control Panel"
 P198.
Snow stuck on the wiper arm prevents the
wiper from working effectively. If snow is
stuck on the wiper arm, pull off the road to
a safe place, then remove it. If you stop
the vehicle at road side, use the hazard
WARNING
Do not use the cruise control on
slippery roads such as snowy or icy
roads. This may cause loss of vehi-
cle control.
CAUTION
Avoid prolonged continuous driving
in snowstorms. Snow will enter the
engine’s intake system and may
hinder the airflow, which could
result in engine shutdown or even
breakdown.
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Loading Your Vehicle
298
NOTEFor better fuel economy, do not carry
unneeded cargo.
■
Vehicle Capacity Weight
The load capacity of your vehicle is deter-
mined by weight, not by available cargo
space. The maximum load you can carry
in your vehicle is shown on the tire infla-
tion pressure label attached to the driver’s
side center pillar. It includes the total
Stow cargo and luggage in the
trunk whenever possible.To prevent cargo and luggage
from sliding forward during
braking, do not stack anything in
the enlarged trunk. Keep cargo
and luggage low, as close to the
floor as possible.When you carry something inside
the vehicle, secure it whenever
you can to prevent it from being
thrown around inside the vehicle
during sudden stops, sharp turns
or in an accident.Secure long items properly to
prevent them from shooting
forward and causing serious
injury during a sudden stop.Never exceed the maximum load
limit. If you do, some parts on
your vehicle can break, or it can
change the way your vehicle
handles. This could result in loss
of control and cause personal
injury. Also, overloading can
shorten the life of your vehicle.
Do not place cargo or luggage in
or on the following locations as
the item may get under the clutch,
brake, or accelerator pedal and
prevent the pedals from being
depressed properly, block the
driver’s vision, or hit the driver or
passengers, causing an accident:
- At the feet of the driver- On the front passenger or rear
seats (when stacking items)- On the rear shelf- On the instrument panel- On the dashboard
CAUTION
Do not carry spray cans, containers
with flammable or corrosive liquids
or any other dangerous items inside
the vehicle.
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Flat Tires
303
In Case of Emergency9
– CONTINUED –
■
Models with Flat Tire Repair
Kit1) Under-floor storage compartment
2) Jack handle
3) Wheel nut wrench
4) Jack
5) Towing hook (eye bolt)6) Screwdriver
7) Flat tire repair kit
■
Models with Spare Tire1) Spare tire
2) Jack handle
3) Wheel nut wrench
4) Jack
5) Towing hook (eye bolt)
6) Screwdriver
9-3. Flat TiresIf you have a flat tire while driving, never
brake suddenly; keep driving straight
ahead while gradually reducing speed.
Then slowly pull off the road to a safe
place.■
Changing a Flat Tire
1
6
4
7
5
2
3901198
1
6
45
2
3901216
WARNING

Use only the jack and the jack
handle provided with your
vehicle. The jack supplied with
the vehicle is designed only for
changing a tire. Never get under
the vehicle while supporting the
vehicle with this jack.Do not jack up the vehicle on an
incline or a loose road surface.
The jack can come out of the
jacking point or sink into the
ground and this can result in
serious injury or death.Before jacking up the vehicle, be
sure that there are no occupants
or cargo on board.Do not jack up the vehicle with an
object on or underneath the jack.
The jack can be unstable and this
can result in a severe accident.
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Flat Tires
304
NOTEContact a SUBARU dealer when jack-
ing up the vehicle using a garage jack.
1. Park on a hard, level surface, when-
ever possible, then stop the engine.
2. Set the parking brake securely and
shift the shift lever in reverse (MT models)
or the select lever to the “P” (Park) posi-
tion (AT models).
3. Turn on the hazard warning flasher
and unload all occupants and luggage
from the vehicle.
4. Put wheel blocks at the front and rear
of the tire diagonally opposite the flat tire.5. Take out the jack, jack handle and
wheel nut wrench.
The tools and the spare tire are stored
under the floor of the trunk. Refer to
"Maintenance Tools"
P302.
NOTEMake sure that the jack is well lubri-
cated before using it.
6. Models with spare tire: Take out the
under-floor storage compartment and turn
the attaching bolt counterclockwise, then
take the spare tire out.
 Always turn off the engine before
raising the flat tire off the ground
using the jack. Never swing or
push the vehicle supported with
the jack. The jack can come out of
the jacking point due to a jolt and
this can result in serious injury or
death. All passengers must exit the
vehicle before you raise it with
the jack. Raising the vehicle with
someone inside of it could result
in serious injury or death.Do not start the vehicle while it is
supported by the jack. Doing so
could result in serious injury or
death.
CAUTION
Do not hit and bend the disc rotor
backing plate when removing and
installing the tire. A bent backing
plate may scrape against the disc
rotor and cause noise while the
vehicle is in motion.
901050
901295
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