2023 SUBARU BRZ ignition

General Information
10
General Information■California Perchlorate Advi -
soryCertain vehicle co mponents such as
airbag modules, seatbelt pretensioners
and keyless entry transmitter batteries
may contain perchlorate material. Special
handling may apply for service or vehicle
end of life disposal. See www.dtsc.ca.gov/
hazardouswaste /perchlorate.■Noise from under the Vehicle
NOTEYou may hear a noise from under the
vehicle approximately 5 to 10 hours
after the ignition sw itch is turned to
the “OFF” position. However, this
does not indicate a malfunction. This
noise is caused by the operation of the
fuel evaporation leakage checking
system and the operation is normal.
The noise will stop after approximately
15 minutes.
■ Vehicle Data RecordingThe vehicle is equipped with sophisticated
computers that will record certain data,
such as:
 Vehicle speed
 Engine speed
 Engine control information
 Shift state information
 Driving information, etc.
▼ Data usageSUBARU may use the data recorded in
this computer to diagnose malfunctions,
conduct research and development, and
improve quality.
SUBARU will not disclose the recorded
data to a third party except:
 With the consent of the vehicle owner
or with the consent of the lessee if the
vehicle is leased
 In response to an official request by the
police, a court of law or a government
agency
 For use by SUBARU in a lawsuit
 For research purposes where the data
is not tied to a specific vehicle or vehicle
owner
 Do not connect any unauthorized
accessories or devices to the
data link connector (OBDII port).
This connector should be used
only with compatible diagnostic
devices for inspection and main-
tenance by an authorized service
technician using authorized
service tools. Connecting unau-
thorized devices, such as a
driver-behavior tracking device,
may adversely affect vehicle
systems, including safety
systems, or allow others to
access information stored in your
vehicle. The use of unauthorized
devices may also cause unex-
pected malfunctions, such as a
drained battery, or may damage
vehicle systems. The manufac-
turer’s warranty will not cover
any part that malfunctions, fails,
or is damaged due to the use of
an unauthorized device with the
data link connector.
BRZ_U.book 10 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Seatbelt Pretensioners
45
Seat, Seatbelt and SRS Airbags1
– CONTINUED –
When you sell your vehicle, we urge
you to inform the bu yer that the vehicle
is equipped with seatbelt
pretensioners. Also, notify the buyer of
the contents in this section.■ Front seatbelt with Shoulder
Belt PretensionerThe pretensioner sensor also serves as
follows.
 Front impact sensor
 Side impact sensor
 Rollover sensor
If the sensor detects a certain predeter-
mined amount of force during frontal or
side collisions or rollover accidents, any
seatbelt that has a se atbelt pretensioner is
quickly drawn back in by the retractor to take up the slack so
that the belt more
effectively restrains the seat occupant.
The front seatbelt pretensioner includes a
tension reducing device which limits the
peak forces exerted by the seatbelt on the
occupant in the event of a collision. The
front passenger's side adaptive force
limiter will select a reducing load to suit the
body size of the occupant as detected by
the occupant detection sensor.
When a seatbelt pretensioner is activated,
an operating noise will be heard and a
small amount of smoke will be released.
These occurrences are normal and not
harmful. This smoke does not indicate a
fire in the vehicle.
Once the seatbelt pretensioner has been
activated, the seatbelt retractor remains
locked. Consequently, the seatbelt cannot
be pulled out and retracted and therefore
must be replaced.
■ System MonitorsA diagnostic system continually monitors
the readiness of the seatbelt pretensioner
with the ignition switch in the “ON” posi-
tion. The seatbelt pr etensioners share the
control module with the SRS airbag
system. Therefore, if any malfunction
occurs in a seatbelt pretensioner, the SRS
airbag system warning light will illuminate. For details, refer to "SRS Airbag System

Monitors" P87.
■ System Servicing
100121
WARNING
When discarding a seatbelt
retractor assembly or scrapping
the entire vehicle damaged by a
collision, consult your SUBARU
dealer. Tampering with or disconnecting
the system’s wiring could result
in accidental activation of the
seatbelt pretensioner and/or SRS
airbag or could make the system
inoperative, which may result in
serious injury. Do not use elec-
trical test equipment on any
circuit related to the seatbelt
pretensioner and SRS airbag
systems. For required servicing
of the seatbelt pretensioner,
consult your nearest SUBARU
dealer.
CAUTION
For the locations of the sensors and
control modules, refer to "Compo-
nents" P68.
BRZ_U.book 45 ページ ２０２２年３月２９日　火曜日　午後３時５９分

SRS Airbag (Supplemental Restraint System Airbag)
75
Seat, Seatbelt and SRS Airbags1
– CONTINUED –
tions are met regarding the front
passenger’s seat.
 When the seat is occupied by an adult.
 When certain items (e.g. jug of water)
are placed on the seat.
▽ If the passenger’s frontal airbag
OFF indicator illuminates and
the ON indicator turns off even
when the front passenger’s seat
is occupied by an adult: Front passenger’s frontal airbag ON
indicator
: Front passenger’s frontal airbag
OFF indicator
This can be caused by the adult incor-
rectly sitting in the front passenger’s seat.
1. Turn the ignition switch to the “OFF”
position.
2. Ask the front passenger to set the
seatback to the upright position, sit up
straight in the center of the seat cushion,
correctly fasten the seatbelt, position his/ her legs out forward, and adjust the seat

to the rearmost position.
3. Turn the ignition switch to the “ON”
position.
If the OFF indicator remains illuminated
while the ON indica tor remains off, take
the following actions.
1. Turn the ignition switch to the “OFF”
position.
2. Make sure that the front passenger
does not use a blanket, extra seat
cushion, seat cover, extra seat heater or
massager, etc.
3. If wearing excessive layers of clothing,
the front passenger should remove any
unnecessary items before sitting in the
front passenger’s seat, or should sit in a
rear seat.
4. Turn the ignition switch to the “ON”
position and wait 6 seconds to allow the
system to complete self-checking.
Following the system check, both indica-
tors turn off for 2 seconds. Now, the ON
indicator should illuminate while the OFF
indicator remains off.
If the OFF indicator still remains illumi-
nated while the ON indicator remains off,
ask the occupant to move to the rear seat
and immediately contact your SUBARU
dealer for an inspection.
CAUTION
When the front passenger's seat is
occupied by an adult, observe the
following precautions.Failure to do so may lessen the load
on the front passenger's seat, deac-
tivating the fron t passenger's SRS
frontal airbag despite the fact that
the seat is occupied by an adult.This may result in personal injury. Do not allow the rear seat occu-
pant to lift the front passenger's
seat cushion using his/her feet. Do not place any article under the
front passenger's seat, or
squeeze any article from behind
and under the seat. Do not squeeze any article
between the front passenger's
seat and side trim/pillar, door or
center console box. This may lift
the seat cushion.
306789
BRZ_U.book 75 ページ ２０２２年３月２９日　火曜日　午後３時５９分

SRS Airbag (Supplemental Restraint System Airbag)
76▼Operation
101586
A
B
1
2
A) Driver’s side
B) Passenger’s side
1) SRS AIRBAGs deploy as soon as a
collision occurs.
2) After deployment, SRS AIRBAGs start
to deflate immediately so that the
driver’s vision is not obstructed.The SRS airbags can function only when
the ignition switch is in the “ON” position.
The SUBARU advanced frontal airbag
system is designed to determine the acti-
vation or deactivation condition of the front
passenger’s SRS frontal airbag
depending on the characteristic of item(s)
or person on the front passenger’s seat
monitored by the front passenger’s occu-
pant detection sensors. For this reason,
only the driver’s SRS frontal airbag may
deploy in the event of a collision, but this
does not mean failure of the system.
If the following sensors detect a predeter-
mined amount of force during a frontal
collision, the control module sends signals
to the airbag module(s) (only driver’s
module or both driver’s and front
passenger’s modules) instructing the
module(s) to inflate the SRS frontal
airbag(s).
BRZ_U.book 76 ページ ２０２２年３月２９日　火曜日　午後３時５９分

SRS Airbag (Supplemental Restraint System Airbag)
81
Seat, Seatbelt and SRS Airbags1
– CONTINUED –
▼SRS curtain airbag
Your vehicle is equipped with a SUBARU
SRS curtain airbag system that complies
with the Federal Motor Vehicle Safety
Standard (FMVSS) No. 226.
The SRS curtain airbag on each side of
the cabin is stored in the roof side
(between the front pillar and a point over
the rear seat). An “SRS AIRBAG” mark is
located at the top of each center pillar.
In a moderate to severe side impact colli-
sion, the SRS curtain airbag on the
impacted side of the vehicle deploys
between the occupant and the side
window and supplements the seatbelt by
reducing the impact on the occupant’s
head.
In a rollover, SRS curtain airbags on both
sides of the vehicle deploy between the
occupant and the side window and
supplement the seatbelt by reducing the
impact to the occupant’s head.
In an offset frontal collision, SRS curtain
airbags on both sides of the vehicle
deploy between the occupant and the side
window and supplement the seatbelt by
reducing the impact to the occupant’s
head and chest. ▼
Operation
The SRS side airbag and SRS curtain
airbag can function only when the ignition
switch is in the “ON” position.
The following airbags deploy inde-
pendently of each other since each has its
own impact sensor.
 Driver’s SRS side airbag
 Front passenger’s SRS side airbag
 SRS curtain airbag (right-hand side)
 SRS curtain airbag (left-hand side)
Therefore, they may not both deploy in the
same accident. Also, the SRS side airbag
and SRS curtain airbag deploys inde-
pendently of the driver’s and front
passenger’s SRS frontal airbags in the
steering wheel and instrument panel.
For the locations of the sensors and
control modules, refer to "Components"
 P68.
▼ After deployment
After the deployment, the SRS side airbag
immediately starts to deflate. The time
required from detection of an impact to
deflation of an SRS side airbag after
deployment is shorter than the blink of an
eye.
The SRS curtain airbag remains inflated
for a while following deployment then
slowly deflates. The SRS side airbag and SRS curtain

airbag deploy even when no one occupies
the seat on the side on which an impact is
applied.
When the SRS side airbag and SRS
curtain airbag deploy, a sudden, fairly loud
inflation noise will be heard and some
smoke will be released. These occur-
rences are a normal result of the deploy-
ment. This smoke does not indicate a fire
in the vehicle.
▼ Example of the type of accident
The SRS side airbag and SRS curtain
airbag are designed as follows:
CAUTION
Do not touch the SRS side airbag
system components around the
front seat seatback with bare hands
right after deployment. Doing so
can cause burns because the com-
ponents can be very hot as a result
of deployment.After deployment, do not touch any
part of the SRS curtain airbag sys-
tem (from the front pillar to the part
of the roof side over the rear seat).
Doing so can cause burns because
the components can be very hot as
a result of deployment.
BRZ_U.book 81 ページ ２０２２年３月２９日　火曜日　午後３時５９分

SRS Airbag (Supplemental Restraint System Airbag)
87
Seat, Seatbelt and SRS Airbags1
– CONTINUED –
▽Examples of the types of acci -
dents in which the SRS side
airbag and SRS curtain airbag
are not designed to deploy in
most cases1) The vehicle is involved in frontal colli- sion with another vehicle (moving or stationary).
2) The vehicle is struck from behind.
3) The vehicle pitches end over end.
In the event of accidents like those illus-
trated, the SRS side airbag and SRS
curtain airbag are not designed to deploy
in most cases.1) First impact
2) Second impact
A) SRS curtain airbag
B) SRS side airbagIn an accident where the vehicle is struck
from the side more than once, the SRS
side airbag and SRS curtain airbag deploy
only once on the first impact.
Example: In the case of a double side
impact collision, first with one vehicle and
immediately followed by another from the same direction, once the SRS side airbag

and SRS curtain airbag are activated on
the first impact, they will not be activated
on the second.
■ SRS Airbag System MonitorsSRS airbag system warning lightA diagnostic system continually monitors
the readiness of the SRS airbag system
(including seatbelt pretensioners) with the
ignition switch in the “ON” position. The
SRS airbag system warn ing light will show
normal system operation by illuminating
for approximately 6 seconds when the
ignition switch is turned to the “ON” posi-
tion.
The following components are monitored
by the indicator:
 Front impact sensor
1
3 2
102056
B
A
1
2
101410
102698
BRZ_U.book 87 ページ ２０２２年３月２９日　火曜日　午後３時５９分

SRS Airbag (Supplemental Restraint System Airbag)
88
- Right-hand side
- Left-hand side
 Airbag control module (including
impact sensor and rollover sensor)
 Frontal airbag module
- Driver’s side
- Front passenger’s side
 Knee airbag module
- Driver’s side
 Side impact sensor
- Center pillar left-hand side
- Center pillar right-hand side
- Forward of rear wheel house left-
hand side
- Forward of rear wheel house right-
hand side
- Door left-hand side
- Door right-hand side
 Side airbag module
- Driver’s side
- Front passenger’s side
 Curtain airbag module
- Right-hand side
- Left-hand side
 Front seatbelt pretensioner and adap-
tive force limiter
- Front passenger's side
 Front seatbelt pretensioner
- Driver's side
 Seatbelt buckle switch
- Front passenger’s side 
Front passenger’s occupant detection
sensor
 Front passenger’s frontal airbag ON
and OFF indicator
 All related wiring
■ SRS Airbag System
Servicing
WARNING
If the warning light exhibits any of
the following conditions, immedi-
ately stop the vehicle in a safe
place, and consult a SUBARU
dealer. Unless a technician checks
and repairs the system as needed,
the seatbelt pretensioners and/or
the SRS airbag will not operate
properly in the event of a collision,
which may result in injury. Flashing or flickering of the
warning light No illumination of the warning
light when the ignition switch is
first turned to the “ON” position Continuous illumination of the
warning light Illumination of the warning light
while driving
WARNING
 When discarding an airbag
module or scrapping the entire
vehicle damaged by a collision,
consult your SUBARU dealer. The SRS airbag has no user-
serviceable parts. Do not use
electrical test equipment on any
circuit related to the SRS airbag
system. For required servicing of
the SRS airbag, consult your
nearest SUBARU dealer.
Tampering with or disconnecting
the system’s wiring could result
in accidental inflation of the SRS
airbag or could make the system
inoperative, which may result in
serious injury.
CAUTION
If you need service or repair in
areas indicated in the following list,
have the work performed by an
authorized SUBARU dealer. The
SRS airbag control module, impact
sensors and airbag modules are
stored in these areas.
BRZ_U.book 88 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Keyless Access with Push-Button Start System
96
NOTEThe operational/non-operational
setting for the keyless access function
can be changed. For the setting proce-
dure, refer to "Disabling Keyless
Access Function" P103.
 For detailed info rmation about the
operation method fo r the push-button
ignition switch while the keyless
access function is switched to the non-
operational mode, refer to "Access Key
Fob – If Access Key Fob Does Not
Operate Properly" P325.
 The keyless access with push-
button start system uses weak radio
waves. The status of the access key
fob and environmental conditions may
interfere with the communication
between the access key fob and the
vehicle under the following conditions,
and it may not be possible to lock or
unlock the doors or start the engine.
CAUTION
 Never leave or store the access
key fob inside the vehicle or
within 6.6 ft (2 m) around the
vehicle (e.g., in the garage). The
access key fob may be locked
inside the vehicle, or the battery
may discharge rapidly. Note that
the push-button ignition switch
may not turn on in some cases
depending on the location of the
access key fob. The access key fob contains elec-
tronic components. Observe the
following precautions to prevent
malfunctions.
- It is recommended to have the
access key fob battery
replaced at an authorized
SUBARU dealer to avoid the
risk of damage.- Do not get the access key fob
wet. If the access key fob gets
wet, wipe it off immediately
and let it dry completely.- Do not apply strong impacts
to the access key fob.
- Never leave the access key
fob in direct sunlight or
anywhere that may become
hot, such as on the dash-
board. It may damage the
battery or cause circuit
malfunctions.- Do not wash the access key
fob in an ultrasonic washer.- Do not leave the access key
fob in humid or dusty loca-
tions. Doing so may cause
malfunctions.- Keep the access key fob away
from magnetic sources.- Do not leave the access key
fob near a personal computer
or home electrical appliance.- Do not leave the access key
fob near a battery charger or
any electrical accessories.- Do not apply metallic window
tint or attach metallic objects
to the windows.- Do not fit non genuine acces- sories or parts.
If the access key fob is dropped,
the integrated emergency key
inside may become loose. Be
careful not to lose the emergency
key.
 When traveling in an airplane, do
not press the button of the access
key fob. If any button of the
access key fob is pressed, radio
waves are emitted and may affect
the operation of the airplane. In a
bag, take measures to prevent the
buttons from being pressed acci-
dentally.
BRZ_U.book 96 ページ ２０２２年３月２９日　火曜日　午後３時５９分