check engine SUBARU BRZ 2023 User Guide

Warning and Indicator Lights
142force will be restored after the steering
wheel is not operated for a while and
the power steering control system has
an opportunity to cool down. However,
if the power steering is operated in a
non-standard way which causes
power assist limitation to occur too
frequently, that may result in a mal-
function of the power steering control
system.■ TRAC OFF Indicator
LightThis light illuminates when the TRAC
system is off. For detai ls, refer to "Vehicle
Stability Control ( VSC)/TRAC System"
 P247.
■ Vehicle Stability
Control (VSC)
Warning Light/Vehicle
Stability Control (VSC) Oper -
ation Indicator Light▼ Vehicle Stability Control (VSC)
warning light
NOTEIf the electrical circuit of the Vehicle
Stability Control (VSC) system itself
malfunctions, the warning light only
illuminates. At this time, the ABS (Anti-
lock Brake System) remains fully oper-
ational.
 The warning light illuminates when
the electronic control system of the
ABS/Vehicle Stability Control (VSC)
system malfunctions.
The Vehicle Stability Control (VSC)
system is probably inoperative under any
of the following conditions. Have your
vehicle checked at a SUBARU dealer
immediately.
 The warning light does not illuminate
when the ignition switch is turned to the
“ON” position.
 The warning light illuminates while the
vehicle is running.NOTEIf the warning light behavior is as
described in the following examples,
the Vehicle Stability Control (VSC) sys-
tem may be considered normal.
 The warning light illuminates right
after the engine is started but turns off
immediately and remains off.
 The warning light illuminates after
the engine has started and turns off
CAUTION
The Vehicle Stability Control (VSC)
system provides its ABS control
through the electrica l circuit of the
ABS. Accordingly, if the ABS is
inoperative, the Vehicle Stability
Control (VSC) system becomes
unable to provide ABS control. As a
result, the Vehicle Stability Control
(VSC) system becomes inoperative,
causing the warning light to illumi-
nate. Although both the Vehicle Sta-
bility Control (VSC) and ABS are
inoperative in this case, the ordi-
nary functions of the brake system
are still available. You will be safe
while driving in this condition, but
drive carefully and have your vehi-
cle checked at a SUBARU dealer as
soon as possible.
BRZ_U.book 142 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Warning and Indicator Lights
143
Instruments and Controls3
– CONTINUED –
while the vehicle is subsequently being
driven.
 The warning light illuminates during
driving, but turns off immediately and
remains off.▼ Vehicle Stability Control (VSC)
operation indicator light
The indicator light flashes during activa-
tion of the skid suppression function and
during activation of the TRAC system.NOTE The light may remain illuminated for
a short period of time after the engine
has been started, especially in cold
weather. This does not indicate the
existence of a problem. The light
should turn off as soon as the engine
has warmed up.
 The indicator light illuminates when
the engine has developed a problem
and the CHECK ENGINE warning light/
malfunction indicator light is on.
The Vehicle Stability Control (VSC)
system is probably malfunctioning under
the following condition. Have your vehicle
checked at a SUBARU dealer as soon as
possible.
 The light does not turn off even after
the lapse of several minutes (the engine
has warmed up) after the engine has
started.
■ Vehicle Stability
Control (VSC) OFF
Indicator Light The light illuminates when “Vehicle
Stability Control (VSC)” is selected to
deactivate the Vehicle Stability Control
(VSC) system.
The Vehicle Stability Control (VSC)
system is probably malfunctioning under
any of the following conditions. Have your
vehicle checked at a SUBARU dealer
immediately.
 The light does not illuminate while the
system check.
 The light does not turn off even after a
period of approximately 2 seconds after
the ignition switch has been turned to the
“ON” position.
■ Warning Chimes and
Warning Indicator of the
Keyless Access with Push-
Button Start SystemAccess key warning indicatorThe keyless access with push-button start
system is equipped wi th a warning chime
and the access key warning indicator in
order to minimize improper operations
and help protect your vehicle from theft.
When the warning chime sounds and/or
the warning indicator appears, take the
appropriate action.
You cannot turn the warning chimes off.
However, the volume setting of the
outside warning chime can be changed by
a SUBARU dealer. Consult your SUBARU
dealer for details.
306791
BRZ_U.book 143 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Warning and Indicator Lights
149
Instruments and Controls3
– CONTINUED –
■Select Lever (AT Models
Only)/Gear Position Indicator1) Upshift indicator
2) Downshift indicator (AT models only)
3) Select lever (AT models only)/gear posi-
tion indicatorThis indicator shows the position of the
shift lever (MT models)/select lever (AT
models).
▼ Gear shift indicator (MT models)
When shifting up is recommended for
good fuel economy, the upshift indicator
blinks. Refer to "G ear shift indicator"
 P234. ▼
Upshift/downshift indicator (AT
models)
When the manual mode is selected, the
gear position indicator (which shows the
current gear selection) and the available
upshift/downshift indicator light up. Refer
to "Selection of Manual Mode" P239
■ Cruise Control Indi -
cator Light (White/
Green)/Cruise Control
Warning Light (Yellow)
(Models without the EyeSight
System)This light illuminates in white when the
“ON-OFF” switch is pressed to activate
the cruise control function. When vehicle
speed has been set to use the cruise
control function, this indicator is lighting in
green.
For details, refer to "Cruise Control
(Models without the EyeSight system)"
 P260.
If this light illuminates in yellow, do not use
the cruise control. Contact your SUBARU
dealer for an inspection.
NOTEIf this indicator light does not illumi-
nate even when you press the “ON-
OFF” switch, the cruise control sys-
tem may not operate properly. Have
your vehicle checked by your nearest
SUBARU dealer.■ Turn Signal Indicator
LightsThese lights show the operation of the
turn signal or lane change signal.
If the indicator lights do not blink or blink
rapidly, the turn signal bulb may be
burned out. Have your vehicle inspected
by your SUBARU dealer as soon as
possible.
12
3
702774
CAUTION
If the malfunction indicator light

(CHECK ENGINE warning light) illu-
minates, the cruise control warning
light (yellow) illuminates at the
same time. At this time, avoid driv-
ing at high speeds and have your
vehicle inspected at a SUBARU
dealer as soon as possible.
BRZ_U.book 149 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Climate Control4
Climate Control
4-1. Ventilator Control................................................198
Center Ventilators.........................................................198
Side Ventilators ............................................................198
4-2. Climate Control Panel.........................................198
4-3. Automatic Climate Control Operation...............200
Sensors .........................................................................200
4-4. Manual Climate Control ......................................201
Airflow Mode Selection ................................................201
Temperature Control ....................................................202
Fan Speed Control........................................................202
Air Conditioner Control................................................202
Air Inlet Selection .........................................................203
To Turn Off the Climate Control System ....................203
4-5. Defrosting ............................................................203 4-6. Operating Tips for Heater and Air

Conditioner ......... ....................................... ........204
Cleaning Ventilator Grille ............................................ 204
Efficient Cooling after Parking in Direct Sunlight .... 204
Lubrication Oil Circulation in the Refrigerant 
Circuit ......................................................................... 204
Checking Air Conditioning System before Summer Season ........................................................................ 204
Cooling and Dehumidifying in High Humidity and 
Low Temperature Weather Condition...................... 205
Air Conditioner Compressor Shut-Off When 
Engine Is Heavily Loaded ......................................... 205
Refrigerant for Your Climate Control System ........... 205
4-7. Air Filtration System ...........................................205
Replacing the Cabin Air Filter .................................... 206
BRZ_U.book 197 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Operating Tips for Heater and Air Conditioner
204system to the setting that had been
selected before the defroster was acti-
vated.
4-6. Operating Tips for Heater and Air Conditioner■ Cleaning Ventilator Grille1) Front ventilator inlet grille
2) CondenserAlways keep the front ventilator inlet grille
free of snow, leaves, or other obstructions
to ensure efficient heating and defrosting.
Since the condenser is located in front of
the radiator, this area should be kept
clean because cooling performance is
impaired by any accu mulation of insects
and leaves on the condenser.
■ Efficient Cooling after
Parking in Direct SunlightAfter parking in direct sunlight, drive with
the windows open for a few minutes to
allow outside air to circulate into the
heated interior. This results in quicker
cooling by the air conditioner. Keep the
windows closed during the operation of
the air conditioner for maximum cooling
efficiency.■ Lubrication Oil Circulation in
the Refrigerant CircuitOperate the air conditioner compressor at
a low engine speed (at idle or low driving
speeds) a few minutes each month during
the off-season to circulate its oil.■ Checking Air Conditioning
System before Summer
SeasonCheck the air conditioner unit for refrig-
erant leaks, hose conditions, and proper
operation each spring. Have the air condi-
tioning system checked by your SUBARU
dealer.
2
1
403492
BRZ_U.book 204 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Air Filtration System
205
Climate Control4
– CONTINUED –
■Cooling and Dehumidifying
in High Humidity and Low
Te mperature Weather Condi -
tionUnder certain weather conditions (high
relative humidity, lo w temperatures, etc.)
a small amount of water vapor emission
from the air outlets may be noticed. This
condition is normal and does not indicate
any problem with the air conditioning
system.■ Air Conditioner Compressor
Shut-Off Whe n Engine Is
Heavily LoadedTo improve acceleration and gas mileage,
the air conditio ner compressor is
designed to temporarily shut off during air
conditioner operation whenever the accel-
erator is fully depressed such as during
rapid acceleration or when driving on a
steep upgrade.
■ Refrigerant for Your Climate
Control Syste m1) Air conditioner labelYour air conditioner uses ozone friendly
refrigerant R-1234yf (HFO-1234yf).
Before adding, changing or checking the
refrigerant, check the air conditioner label
in the location shown in the illustration to
confirm the type of refrigerant is used in
your vehicle.
Consult your SUBARU dealer for service.
Repairs needed as a result of using the
wrong refrigerant are not covered under
warranty.
4-7. Air Filtration SystemYour vehicle’s air conditioning system is
equipped with an air filtration system.
Replace the cabin air filter according to
the replacement schedule found in the
“Warranty and Maintenance Booklet”.
This schedule should be followed to main-
tain the filter’s dust collection ability.
Under extremely dusty conditions, the
filter should be replaced more frequently.
Have your filter checked or replaced by
your SUBARU dealer. For replacement,
use only a genuine SUBARU air filter kit.NOTEThe filter can influence the air condi-
tioning, heating and defroster perfor-
mance if not properly maintained.
1
403493
CAUTION
Contact your SUBARU dealer if the
following occurs, even if it is not yet
time to change the filter. Reduction of the airflow through
the vents. Windshield gets easily fogged or
misted.
BRZ_U.book 205 ページ ２０２２年３月２９日　火曜日　午後３時５９分

USB Power Supply
216
6-6. USB Power Supply
NOTEThe rated voltage of each USB
terminal is 5 V/2.1 A (total 4.2 A). For
details about the maximum rated
power, refer to "How to Use the USB
Power Supply" P217. Before
connecting a device, be sure to read
the instruction manual of the device
and check whether or not this specifi-
cation of the output is supported by the
device. If a device that requires power
exceeding the maximum rating is
connected, power supply or charging
may not be possible. Even if charging
could be completed, the time required
for charging may be longer than when
the genuine charger for that device is
used.
 Depending on the device, charging
may be possible only when a special
If the plug on your electric appli-
ance is either too loose or too
tight for the accessory power
outlet, this can result in a poor
contact or cause the plug to get
stuck. Only use plugs that fit
properly. Use of an electric appliance in the
accessory power outlet for a long
period of time while the engine is
not running can cause battery
discharge. Before driving your vehicle, make
sure that the plug and the cord on
your electrical appliance will not
interfere with your shifting gears
and operating the accelerator and
brake pedals. If they do, do not
use the electrical appliance while
driving.
CAUTION
 The specification of a USB
terminal that can be used is the A-
type. If a different specification of
terminal is connected, power
supply or charging may not be
possible, or the device may
malfunction. There is a risk that a connected
device may malfunction or data
may be damaged. The connection
of a device shall be performed at
your responsibility. To avoid an electric shock or a
malfunction, observe the
following precautions.
- Do not connect a USB hub.- Do not insert any metal or
other foreign object into the
USB terminal.- Do not spill water or other
liquid on the USB terminal.
 Be careful not to pull the
connected cable. Doing so could
break the USB terminal and the
connected device.
 If a device is connected for a long
time when the engine is not
running, doing so may cause the
risk of a discharged battery. Even
when the engine is running, we
recommend that you do not
connect a device for an unneces-
sarily long time. Do not connect a malfunctioning
device. Doing so may cause the
risk of smoke and fire.
BRZ_U.book 216 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Starting and Operating7
Starting and Operating
7-1. Fuel.......................................................................223
Fuel Requirements .......................................................223
Fuel Filler Lid and Cap .................................................224
7-2. State Emission Testing (U.S. Only) ...................227
7-3. Preparing to Drive ...............................................228
7-4. Starting and Stopping Engine ...........................229
Safety Precautions ............................................ ...........229
Operating Range for Push-Button Start System .......229
General Precautions When St arting Engine ..............229
Starting Engine .............................................................230
Stopping Engine ...........................................................232
When Access Key Fob Does Not Operate 
Properly.......................................................................232
Steering Lock ................................................................232
7-5. Manual Transmission .........................................233
Shifting Speeds ............................................................234
Driving Tips ...................................................................235
7-6. Automatic Transmission ....................................235
Select Lever ..... .......................................... ...................236
Adaptive Control...........................................................237
Shift Lock Function ......................................................238
Selection of Manual Mode ...........................................239
Driving Tips ...................................................................240
7-7. Driving Mode Select Switch (If Equipped) ........241
Normal Mode .................................................................241
Sport Mode ....................................................................241
Snow Mode....................................................................241
Driving Mode Select Switch.........................................241
7-8. Active Sound Control .........................................242
7-9. Power Steering ....................................................242
7-10. Braking...............................................................243
Braking Tips ..................................................................243 Brake System ............................................................... 244
Disc Brake Pad Wear Warning Indicators ................. 245
7-11. ABS (Anti-Lock Brake System) ........................245
ABS Self-Check............................................................ 245
ABS Warning Light ...................................................... 245
7-12. Electronic Brake Force Distribution (EBD)
System ...............................................................246
EBD System Malfunctions .......................................... 246
7-13. Vehicle Stability Control (VSC)/TRAC 
System ...............................................................247
Vehicle Stability Control (VSC) System ..................... 247
TRAC System ............................................................... 247
Vehicle Stability Control (VSC) System Monitor....... 248
Vehicle Stability Control (VSC) OFF Switch .............. 248
7-14. TRACK Mode .....................................................250
TRACK Mode ................................................................ 250
Selecting TRAC Mode and Ve hicle Stability Control
(VSC) Mode ............................................................... 251
7-15. Tire Pressure Monitoring System (TPMS) 
(If Equipped) ......................................................251
Certification for the Transmitter ................................. 253
Certification for the Receiver...................................... 253
TPMS Screen ................................................................ 254
Initializing the Tire Pressure Monitoring System ..... 254
How to Initialize the Tire Pressure Monitoring 
System (If Equipped) ................................................. 254
If You Press the Tire Pressure Monitoring Reset 
Switch Accidentally................................................... 254
Initialization Procedure ............................................... 254
When Initialization of the Tire Pressure Monitoring System has Failed ..................................................... 255
Registering ID Codes .................................................. 255
BRZ_U.book 221 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Fuel
223
Starting and Operating7
– CONTINUED –
7-1. Fuel■Fuel RequirementsThe engine is designed to operate using
unleaded gasoline with an octane rating
of 93 AKI (98 RON) or higher .
If unleaded gasoline with an octane
rating of 93 AKI (98 RON) is not available,
unleaded gasoline with an octane rating of
91 AKI (95 RON) may be used with no
detriment to engine durability or
driveability.
However, you may notice a slight
decrease in maximum engine perfor-
mance and you may hear some knocking
(pinging) from the engine while using 91
AKI (95 RON) fuel. Use of 91 AKI (95 RON)
fuel will not affect your warranty
coverage.
▼ Fuel octane rating
Using a gasoline with a lower octane
rating can cause persistent and heavy
knocking, which can damage the engine.
Do not be concerned if your vehicle some-
times knocks lightly when you drive up a
hill or when you accelerate. See your
dealer or a qualified service technician if
you use a fuel with the specified octane
rating and your vehi cle knocks heavily or
persistently.
▽RON
This octane rating is the Research Octane
Number.
▽AKI
This octane rating is the average of the
Research Octane and Motor Octane
numbers and is commonly referred to as
the Anti Knock Index (AKI).
▼ Unleaded gasoline
The neck of the fuel filler pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will
damage the emission control system and
may impair driveability and fuel economy. ▼
Reformulated gasoline
SUBARU supports the use of reformu-
lated gasoline when available. Reformu-
lated gasoline has been blended to burn
more cleanly and reduce vehicle emis-
sions.
▼ MMT
Some gasoline contains an octane-
enhancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/
malfunction indicator light may turn on. If
this happens, return to your authorized
SUBARU Dealer for service. If it is deter-
mined that the condition is caused by the
type of fuel used, repairs may not be
covered by your warranty.
▼ Gasoline for cleaner air
Your use of gasoline with detergent addi-
tives will help prevent deposits from
forming in your engi ne and fuel system.
This helps keep your engine in tune and
your emission cont rol system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high quality fuel with the proper detergent
and other additives, you should never
CAUTION
Use of a fuel which is low in
quality or use of an inappropriate
fuel additive may cause damage
to the engine and/or fuel system. Some gas stations, particularly
those in high altitude areas, offer
fuels posted as regular octane
gasoline with an octane rating
below 93 AKI (98 RON). Use of
those fuels are not recom-
mended.
BRZ_U.book 223 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Fuel
2266. Stop filling the tank after the fuel filler
pump automatically stops. Do not add any
more fuel.
7. Put the cap back on and turn it clock-
wise until you hear a clicking noise. Be
certain not to catch the tether under the
cap while tightening.
8. Close the fuel filler lid completely.
NOTE You will see the “ ” sign in the
fuel gauge. This indicates that the fuel
filler lid is located on the right side of
the vehicle.
 If the fuel filler cap is not tightened
until it clicks or if the tether is caught
under the cap, the CHECK ENGINE
warning light/malfunction indicator
light may illuminate. Refer to "CHECK
ENGINE Warning Light/Malfunction
Indicator Light" P136.
 To lock the fuel filler lid, perform one
of the operations below. However if
these operations are performed when
the fuel filler lid is open, the fuel filler
lid will not lock when it is subsequently
closed. - Press the “ ” button on the key
fob.
- Press the lock side of the power
door locking switch.
WARNING
 When refueling, insert the fuel
nozzle securely into the fuel filler
pipe. If the nozzle is lifted or not
fully inserted, its automatic stop-
ping mechanism may not func-
tion, causing fuel to overflow the
tank and creating a fire hazard. Stop refueling when the auto-
matic stop mechanism on the fuel
nozzle activates. If you continue
to add fuel, temperature changes
or other conditions may cause
fuel to overflow from the tank and
create a fire hazard.
CAUTION
Make sure that the cap is tightened
until it clicks to prevent fuel spillage
in the event of an accident.
CAUTION
Do not let fuel sp ill on the exterior
surfaces of the vehicle. Because
fuel may damage th e paint, be sure
to wipe off any spilled fuel quickly.
Paint damage caused by spilled fuel
is not covered under the SUBARU
Limited Warranty.
CAUTION
 Never add any cleaning agents to
the fuel tank. Th e addition of a
cleaning agent may cause
damage to the fuel system. After refuelin g, turn the cap to the
right until it clicks to ensure that it
is fully tightened. If the cap is not
securely tightened, fuel may leak
out while the vehicle is being
driven or fuel spillage could
occur in the event of an accident,
creating a fire hazard. Do not let fuel spill on the exterior
surfaces of the vehicle. Because
fuel may damage the paint, be
sure to wipe off any spilled fuel
quickly. Paint damage caused by
spilled fuel is not covered under
the SUBARU Limited Warranty. Always use a genuine SUBARU
fuel filler cap. If you use the
wrong cap, it may not fit or have
proper venting and your fuel tank
and emission control system may
be damaged. It could also lead to
fuel spillage and a fire.
BRZ_U.book 226 ページ ２０２２年３月２９日　火曜日　午後３時５９分