2018 SUBARU BRZ fuel

354
4-2. Maintenance
BRZ_U (A4450BE-A)
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which
include OBD (On Board Diagnostics) checks. The OBD system moni-
tors the operation of th e emission control system.
■If the malfunction indicator lamp comes on
The OBD system determines that a problem exists somewhere
in the emission control system. Your vehicle may not pass the I/
M test and may need to be repaired. Contact your SUBARU
dealer to service the vehicle.
■ Your vehicle may not pass the I/M test:
● When the battery is disconnected or discharged
Readiness codes that are set during ordinary driving are
erased.
Also, depending on your driving habits, the readiness codes
may not be completely set.
● When the fuel tank cap is loose
The malfunction indicator lamp comes on as a temporary mal-
function and your vehicle may not pass the I/M test.
■ When the malfunction indicator lamp goes off after several
driving trips
The error code in the OBD system will not be cleared unless the
vehicle is driven 40 or more times.
■ If your vehicle does not pass the I/M test
Contact your SUBARU dealer to prepare the vehicle for re-test-
ing.

357
4-3. Do-it-yourself maintenance
4
Maintenance and care
BRZ_U (A4450BE-A)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
■
When working in the engine compartment
● Keep hands, clothing, and tools away from the moving fan and engine
drive belt.
● Be careful not to touch the engine, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
● Do not leave anything that may burn easily, such as paper or rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or the bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
■ When working near the electric cooling fans or radiator grille
Vehicles without a keyless access with push button start system: Be sure the
engine switch is off. With the engine switch in the “ON” position, the electric
cooling fans may automatically start to run if the air conditioning is on and/or
the coolant temperature is high. ( →P. 366)
Vehicles with a keyless access with push button start system: Be sure the
push-button ignition switch is off. With the push-button ignition switch in
“ON” mode, the electric cooling fans may automatically start to run if the air
conditioning is on and/or the coolant temperature is high. ( →P. 366)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.
CAUTION
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air. Also a backfire could cause a fire in the engine compart-
ment.

363
4-3. Do-it-yourself maintenance
4
Maintenance and care
BRZ_U (A4450BE-A)
●
When the engine is operated at high engine speeds (for extended peri-
ods of time)
● When the engine is operated under heavy loads (for extended periods of
time)
● When the engine idles for extended periods of time
● When the vehicle is operated in stop and go and/or heavy traffic situa-
tions
● When the vehicle is used under severe thermal conditions
● When the vehicle accelerates and decelerates frequently
Under these or similar conditions, you should check your oil at least every
2nd fuel fill-up and change your engine oi l more frequently. Different drivers
in the same car may experience different results. If your oil consumption rate
is greater than expected, contact y our authorized SUBARU retailer who may
perform a test under controlled conditions.
WARNING
■ Used engine oil
● Used engine oil contains potentially harmful contaminants which may
cause skin disorders such as inflammation or skin cancer, so care should
be taken to avoid prolonged and repeated contact. To remove used engine
oil from your skin, wash thoroughly with soap and water.
● Dispose of used oil and filters only in a safe and acceptable manner. Do
not dispose of used oil and filters in household trash, in sewers or onto the
ground.
Call your SUBARU dealer, service station or auto parts store for informa-
tion concerning recycling or disposal.
● Do not leave used engine oil within the reach of children.

384 4-3. Do-it-yourself maintenance
BRZ_U (A4450BE-A)
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drive train
If a tire needs frequent refilling, have it checked by your SUBARU dealer.
■Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following:
●Check only when the tires are cold.
If your vehicle has been parked for at least 3 hours and has not been
driven for more than 1 mile or 1.5 km, you will get an accurate cold
tire inflation pressure reading.
●Always use a tire pressure gauge.
It is difficult to judge if a tire is properly inflated based only on its
appearance.
●It is normal for the tire inflation pressure to be higher after driving as
heat is generated in the tire. Do not reduce tire inflation pressure after
driving.
●Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle
is balanced.

401
4-3. Do-it-yourself maintenance
4
Maintenance and care
BRZ_U (A4450BE-A)
16SPARE See note. Spare fuse
17SPARE See note. Spare fuse
18SPARE See note. Spare fuse
19SPARE See note. Spare fuse
20SPARE See note. Spare fuse
21ST 7.5 A Starting system
22ALT-S 7.5 A

23(STR LOCK) 7.5 A Steering lock system
24D/L 20 A Power door lock
25ETCS 15 A Engine control unit
26(AT+B) 7.5 A Transmission
27(AM2 NO. 2) 7.5 AKeyless access with push button
start system
28EFI (CTRL) 15 A Engine control unit
29EFI (HTR) 15 AMultiport fuel injection system/
sequential multiport fuel injection
system
30EFI (IGN) 15 A Starting system
31EFI (+B) 7.5 A Engine control unit
32HAZ 15 A
Turn signal lights, hazard warning
flashers
33MPX-B 7.5 AAutomatic air condi
tioning system,
gauge and meters
34F/PMP 20 A Multiport fuel injection system/
sequential multiport fuel injection
system
35IG2 MAIN 30 A
SRS airbag system, engine control
unit
36DCC 30 AInterior light, remote keyless entry
system, main body ECU
FuseAmpereCircuit

402 4-3. Do-it-yourself maintenance
BRZ_U (A4450BE-A)Note
One of each of the following spare fuses are provided: 7.5 A, 10 A, 15
A, 20 A, 25 A, 30 A.
37HORN NO. 2 7.5 A Horn
38HORN NO. 1 7.5 A Horn
39H-LP LH LO 15 A Left-hand headlight (low beam)
40H-LP RH LO 15 A Right-
hand headlight (low beam)
41H-LP LH HI 10 A Left-hand headlight (high beam)
42H-LP RH HI 10 A Right-hand headlight (high beam)
43INJ 30 AMultiport fuel injection system/
sequential multiport fuel injection
system
44H-LP WASHER 30 A
45AM2 NO. 1 40 A Starting system, engine control unit
46EPS 80 A Electric power steering
47A/B MAIN 15 A SRS airbag system
48ECU-B 7.5 A
Remote keyless entry system,
main body ECU
49DOME 20 A Interior light
50IG2 7.5 A Engine control unit
FuseAmpereCircuit

When trouble arises5
417
BRZ_U (A4450BE-A)
5-1. Essential informationHazard warning flashers .......................... 418
If your vehicle needs to be towed ........................ 419
If you think something is wrong ............................. 426
Fuel pump shut off system ........................... 427
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds... ....................... 428
If a warning message is displayed........................ 440
If you have a flat tire......... 457
If the engine will not start ................................ 471 If the select lever cannot
be shifted from P ............ 474
If you lose your keys ........ 475
If the access key does not operate properly....... 476
If the battery is discharged ..................... 480
If your vehicle overheats ....................... 485
If the vehicle becomes stuck .............................. 488

5
When trouble arises
423
5-1. Essential information
BRZ_U (A4450BE-A)
Towing with a sling-type truck
WARNING
■
Installing towing eyelets to the vehicle
Make sure that towing eyelet is installed securely.
If not securely installed, towing eyelets may come loose during towing. This
may lead to accidents that cause serious injury or even death.
■ After towing
● Always remove the towing eyelet. Failure to do so can cause the SRS air-
bags to not operate correctly in the event of a frontal collision.
● Always remove the towing eyelets. Failure to do so may prevent the fuel
pump shut off system from operating properly if the vehicle receives an
impact from the rear.