brake SUBARU BRZ 2023 Service Manual

Parking Your Vehicle
256To release the parking brake, pull the
lever up slightly, press the release button,
then lower the lever while keeping the
button pressed.
When the parking brake is set while the
engine is running, the parking brake
warning light illuminates. After starting the
vehicle, be sure that the warning light has
turned off before the vehicle is driven.
Refer to "Brake System Warning Light"
 P140.
■ Parking TipsWhen parking your vehicle, always
perform the following items.
 Apply the parking brake firmly.
 For MT models, put the shift lever in the
“1” (1st) for upgrade or “R” (Reverse) for a
downgrade.
 For AT models, put the select lever in
the “P” (Park) position.
Never rely on the mechanical friction of
the transmission alone to hold the vehicle.
When parking on a hill, always turn the
steering wheel. When the vehicle is headed up the hill, the front wheels should

be turned away from the curb.
When facing downhill, the front wheels
should be turned into the curb.
CAUTION
 Never drive while the parking
brake is set because this will
cause unnecessary wear on the
brake linings. Before starting to
drive, always make sure that the
parking brake has been fully
released.
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 The braking power of the parking
brake may not be sufficient when
stronger braking power is
needed.
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CAUTION
If your vehicle has a front under-
spoiler and rear underspoiler (both
optional), pay attention to blocks
and other obstructions on the
ground when parking. The under-
spoilers could be damaged by con-
tact with them.
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Hill Start Assist System
257
Starting and Operating7
– CONTINUED –
7-17. Hill Start Assist SystemThe Hill start assist system is a device to
make the following vehicle operations
easier.
1) Starting forward facing uphill
2) Starting backward facing downhill
A) Brake pedal (both MT models and AT
models)
B) Clutch pedal (MT models only)
In both these cases, the Hill start assist
system operates under the following
conditions.
 The clutch pedal is depressed while the
brake pedal is also depressed (MT
models).
 The vehicle has stopped with the brake
pedal depressed (AT models).
Braking power is maintained temporarily
(for approximately 2 seconds) by the Hill
start assist system after the brake pedal is
released. The driver is therefore able to
start the vehicle in the same way as on a
level grade, just using the clutch pedal
(MT models only) and accelerator pedal
(all models).
If the braking power of the Hill start assist
system is insufficient after the brake pedal
is released, apply more braking power by
depressing the brake pedal again.
The Hill start assist system may not
operate on slight grades. Also, the Hill
start assist system does not operate in the
following cases.
WARNING
 The Hill start assist system is a
device only for helping the driver
to START the vehicle on an uphill
grade. To prevent accidents when
the vehicle is parked on a slope,
be sure to firmly set the parking
brake. When setting the parking
brake, make sure that the vehicle
remains stationary when the
clutch pedal (MT models) and
brake pedal (both MT and AT
models) are released. Do not turn the ig nition switch to
the “OFF” position while the Hill
start assist system is operating.
The Hill start assist system will be
deactivated and may lead to an
accident.
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Hill Start Assist System
258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 “OFF” position 
While the Hill start assist indicator light
is illuminated. Refer to "Hill Start Assist
Indicator Light" P150.
When using the Hill start assist system, a
braking effect may be felt even after the
brake pedal has been released. However,
for MT models, this braking effect should
disappear once the clutch pedal is
released.
NOTEA slight jolt may be felt when the vehi-
cle begins to move forward after being
reversed.
■ To Activate/Deactivate the
Hill Start Assist SystemHill start assis t indicator light
To activate or deactivate the Hill start
assist system, perform the following
steps.
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CAUTION
The braking power of the Hill start
assist system may not be sufficient
when strong braking power is
needed.
CAUTION
When starting on an uphill grade,
make sure the Hill start assist indi-
cator light is on.If the Hill start assist indicator light
is off, make sure the parking brake
is applied.
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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.
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Cruise Control (Models without the EyeSight system)
261
Starting and Operating7
– CONTINUED –
3. Push the Cruise control switch to the “-
SET” side and release it.NOTEWhen setting a cruise speed for the
first time during a drive, both “-SET”
and “+RES” may be u sed to set the ini-
tial cruise speed.
Cruise control indicator light
1) When setting the displayed unit as
“MPH”
2) When setting the displayed unit as 
“km/h”At this time, the cruise control indicator
light (green) is illuminated in the combina-
tion meter. The set speed will be shown on
the combination meter. You can change
the displayed units by operating the
combination meter display. For details,
refer to "Combination Meter Settings"
 P130.
The vehicle will maintain the desired
speed.
Vehicle speed can be temporarily
increased while driving with the cruise
control activated. Simply depress the
accelerator pedal to accelerate the vehicle. When the accelerator pedal is

released, the vehicle will return to and
maintain the previous cruising speed.
■ To Temporarily Cancel the
Cruise ControlThe cruise control can be temporarily
canceled in the following ways.
 Pulling the cruise control switch.
 Depress the brake pedal.
 Depress the clutch pedal.
When the cruise control is cancelled, the
cruise control indicator light in the combi-
nation meter will change from green to
white.
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Rear View Camera
263
Starting and Operating7
– CONTINUED –
the switch. The vehicle speed at that
moment will be memorized and treated as
the new set speed.
When setting the displayed unit as
“MPH”: 
The set speed can be decreased 1 mph
(1.6 km/h) each time by pushing the cruise
control switch to the “-SET” side.
When setting the displayed unit as
“km/h”: 
The set speed can be decreased 1 km/h
(0.6 mph) each time by pushing the cruise
control switch to the “-SET” side.▼ 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, push the cruise control
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.■ Cruise Control Indicator
LightRefer to "Combination Meter Settings"
 P130.
7-19. Rear View CameraA rear view camera is attached to the
trunk lid. When the ignition switch is in the
“ON” position and the shift lever (MT
models) or select lever (AT models) is set
to “R”, the rear view camera automatically
displays the rear view image behind the
vehicle on the center information display.
WARNING
 Since the rear view camera uses a
wide-angle lens, the image on the
monitor is diffe rent from the
actual view in terms of distance.
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 Since the range of the image on
the monitor is limited, always
check the rear view and the
surrounding area with your eyes
and mirrors, and move backward
at a slow speed. Moving back-
ward only by checking the rear
view image from the camera
could cause an accident. Do not disassemble or modify the
camera, switch or wiring. If
smoke comes out or you smell a
strange odor, stop using the rear
view camera immediately.
Contact your SUBARU dealer for
an inspection. Continued use
may result in accident, fire or
electric shock.
CAUTION
 When washing your vehicle with
a high-pressure washer, do not
allow water to touch the camera
directly. Entry of water in the
camera lens may result in
condensation, malfunction, fire
or electric shock. Since the camera is a precision
device, do not subject it to strong
impacts. Otherwise, malfunction,
fire or electric shock may occur.
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Rear View Camera
264NOTEDo not wipe the camera with
alcohol, benzine or paint thinner.
Otherwise, discoloration may occur.
To remove contamination, wipe the
camera with a cloth moistened with a
diluted neutral detergent. Then wipe it
with a soft, dry cloth. 
When waxing the vehicle, be careful
not to apply the wax to the camera. If it
comes in contact with the camera,
moisten a clean cloth with a diluted
neutral detergent to remove the wax.
 The camera lens has a hard coating
to help prevent scratches. However,
when washing the vehicle or cleaning
the camera lens, be careful not to
scratch the camera lens. Do not use a
washing brush directly on the camera
lens. The image quality of the rear view
camera may deteriorate.
 Strong light shined on the camera
lens may develop vertical lines around
the light source. This is not a malfunc-
tion.
 Under the fluorescent light, the
display may flicker. However, this is
not a malfunction.
 The image of the rear view camera
may be slightly different from the
actual color of the objects.
 If there is a malfunction on the
center information display, refer to
"Malfunctions of the Center Informa-
tion Display" P327.
■ How to Use the Rear View
CameraWhen the shift lever/se lect lever is set to
“R”, the rear view camera automatically
displays the rear view image from the vehicle. When the lever is set to other

positions, the image before setting to “R”
is displayed.
1. Set the ignition switch to “ON”.
2. Set the shift lever/ select lever to “R”.
NOTEThe image of the rear view camera is
horizontally reversed as is the case
with the vehicle inside mirror or the
outside mirror.
 When “Rear Camera Delay Control”
is on, the rear view image from the rear
view camera will be displayed on the
center information display for a certain
amount of time after the shift lever (MT
models) or select lever (AT models) is
shifted from “R” to another position.
When any of the following conditions
are met, the rear view image will be
canceled: - The select lever is shifted to “P”
(AT models)
- The vehicle speed becomes
approximately 5 mph (8 km/h) or
more
- The parking brake is engaged
- 9 seconds have elapsed since
the shift lever (MT models) or select
lever (AT models) was shifted from
“R” to another position
 If mud or snow sticks to or is
frozen on the camera, you must
be very careful when removing it.
Otherwise, damage to the camera
may cause a fire or electric shock.
Pour water or lukewarm water
over the camera to remove mud
and ice, and wipe it with a soft,
dry cloth. Do not put a flame close to the
camera or wiring. Otherwise,
damage or fire may occur. When replacing the fuse, be sure
to use a fuse with the specified
rating. Use of a fuse with a
different rating may result in a
malfunction. If you use the rear view camera
for a long time wh ile the engine is
not operated, the battery may
become completely discharged.
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Reverse Automatic Braking (RAB) System (If Equipped)
277
Starting and Operating7
– CONTINUED –
7-21. Reverse Automatic
Braking (RAB) System (If Equipped)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 direc-
tion, the system will notify the driver with a
warning sound and may activate the
vehicle’s brakes automatically.
NOTEThe 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
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 pro-
vide 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 identi-
fied is provided to a research institu-
WARNING
 Reverse Automatic Braking
(RAB) is not a system intended to
replace the driver’s responsibility
to check their surroundings for
vehicles or obstacles to avoid a
collision. The driver is responsible for
driving 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 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 to OFF when towing the
vehicle. Otherwis e, 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.
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Reverse Automatic Braking (RAB) System (If Equipped)
278tion for statistical processing or similar
purposes.■ Reverse Automatic Braking
(RAB) System OverviewThe Reverse Automatic Braking (RAB)
system will operate th e 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 de celerates the
vehicle and controls the braking to reduce
damage.
1) When reversing
2) When either strong automatic br aking 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)
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4
2 Object Close Behind
3 Apply Brake To Hold Position 4
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Reverse Automatic Braking (RAB) System (If Equipped)
279
Starting and Operating7
– CONTINUED –
■Operating ConditionsThe Reverse Automatic Braking (RAB)
system will operat e when all of the
following conditions are met.
1) EyeSight warning indicator
2) RAB warning indicator
3) RAB OFF indicator The ignition switch is in the “ON” posi-
tion.
 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 Brak ing 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
cannot be operated. - The RAB OFF indicator is illumi-
nated.
 In the following ca ses, 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
removed and attached.
- The ground clearance is
changed due to the vehicle’s
loading condition or modification.
- There is damage to the sonar
sensors or the rear bumper near the
sonar sensor.
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 rec-
ognize 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 can-
cel the system, refer to "Canceling
the Reverse Automatic Braking
(RAB) System Operation" P285.
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