ECU SUBARU BRZ 2017 1.G Workshop Manual

328 4-2. Maintenance
Vehicle interior
ItemsCheck points
Accelerator pedal• Moves smoothly (without uneven
pedal effort or catching)?
Automatic transmission “Park”
mechanism• Can the vehicle be held securely
on an incline with the select lever
in P?
Brake pedal• Moves smoothly?
• Does it have appropriate clear-
ance and correct amount of free
play?
Brakes• Not pull to one side when
applied?
• Loss of brake effectiveness?
• Spongy feeling brake pedal?
• Pedal almost touches floor?
Clutch pedal • Moves smoothly?
Head restraints• Move smoothly and lock
securely?
Indicators/buzzers • Function properly?
Lights • Do all the lights come on?
Parking brake• Moves smoothly?
• Can hold the vehicle securely on
an incline?
Seatbelts• Does the seatbelt system oper-
ate smoothly?
• Are the belts undamaged?
Seats• Do the seat controls operate
properly?
Steering wheel• Moves smoothly?
• Has correct free play?
• No strange noises?

345 4-3. Do-it-yourself maintenance
4
Maintenance and care
■Adding distilled water
Remove the vent plug.
Add distilled water.
If the “UPPER LEVEL” line cannot be seen, check the fluid level by
looking directly at the cell.
Put the vent plug back on and close securely.
Low O.K.
STEP 1
STEP 2
STEP 3

376 4-3. Do-it-yourself maintenance
16
SPARE 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 ATurn signal lights, hazard warning
flashers
33MPX-B 7.5 AAutomatic air conditioning system,
gauge and meters
34F/PMP 20 AMultiport fuel injection system/
sequential multiport fuel injection
system
35IG2 MAIN 30 ASRS airbag system, engine control
unit
36DCC 30 AInterior light, remote keyless entry
system, main body ECU
FuseAmpereCircuit

377 4-3. Do-it-yourself maintenance
4
Maintenance and care
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 ARemote keyless entry system,
main body ECU
49DOME 20 A Interior light
50IG2 7.5 A Engine control unit
FuseAmpereCircuit

378 4-3. Do-it-yourself maintenance
■Instrument panel
FuseAmpereCircuit
1ECU ACC 10 AMain body ECU, outside rear view
mirrors
2P/POINT No.2 15 A Power outlet
3PANEL 10 A Illumination
4TAIL 10 A Tail lights
5DRL 10 A Daytime running light system
6STOP 7.5 A Stop lights
7OBD 7.5 A On-board diagnosis system
8HEATER-S 7.5 A Air conditioning system
9HEATER 10 A Air conditioning system
10FR FOG LH 10 A Left-hand front fog light
11FR FOG RH 10 A Right-hand front fog light
12BK/UP LP 7.5 A Back-up lights
13ECU IG1 10 A ABS, electric power steering
14AM1 7.5 A Starting system
15AMP 15 A Audio system
16AT UNIT 15 A Transmission
17GAUGE 7.5 AGauge and meters, keyless access
with push button start system
18ECU IG2 10 A Engine control unit
19SEAT HTR LH 10 A Left-hand seat heater
20SEAT HTR RH 10 A Right-hand seat heater
21RADIO 7.5 A Audio system
22P/POINT No.1 15 A Power outlet

390 4-3. Do-it-yourself maintenance
WARNING
■Replacing light bulbs
●Only replace a bulb when it is cool enough to touch. Do not attempt to
replace bulbs while they are hot, as doing so may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install the light bulbs and any parts used to secure them. Failure to
do so may result in heat damage, fire, or water entering a light unit. This
may damage the light or cause condensation to build up on the inner side
of the lens.
■When changing the back-up lights
Stop the engine and wait until the exhaust pipes have cooled down suffi-
ciently. The lights are located near the exhaust pipe and touching a hot
exhaust pipe can cause burns.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.

5
When trouble arises
393
5-1. Essential information
If your vehicle needs to be towed
Emergency towing
If a tow truck is not available in an emergency, your vehicle may be
temporarily towed using a cable or chain secured to the emergency
towing eyelet to move the vehicle to a safe location or to free a stuck
vehicle from sand or snow. This should only be attempted on hard
surfaced roads for short distances at low speeds.
A driver must be in the vehicle to steer and operate the brakes. The
vehicle's wheels, drive train, axles, steering and brakes must be in
good condition.
For vehicles with an automatic transmission, only the front towing
eyelet may be used.
Towing eyelet
If towing is necessary, we recommend having your vehicle towed by
your SUBARU dealer or a commercial towing service, using a flat
bed truck.
The vehicle must be secured properly with safety chains. Each
safety chain should be equally tightened and care must be taken not
to pull the chains so tightly that the suspension bottoms out.

396 5-1. Essential information
Rear
Insert the towing eyelet into the
hole and tighten partially by
hand.
Tighten down the towing eyelet
securely using a wheel nut
wrench.
STEP 2
STEP 3
■Location of the emergency towing eyelet
oP. 431

5
When trouble arises
397 5-1. Essential information
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.

5
When trouble arises
405 5-2. Steps to take in an emergency
(Comes on in
yellow)Cruise control indicator light
Indicates a malfunction in the cruise control system.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The malfunction indicator lamp will go off after several driving trips.
If the malfunction indicator lamp does not go off even after several trips, con-
tact your SUBARU dealer as soon as possible.
■SRS airbag system warning light
oP. 127
■Electric power steering warning light (warning buzzer)
The electric power steering warning light may come on and the warning
buzzer may sound when the voltage is low or the voltage drops.
WARNING
■When the electric power steering warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold
firmly and operate using more force than usual.
Warning lightWarning light/Details