ECU SUBARU BRZ 2023 Repair Manual

Tire Information
400Rim type designation
The industry of manufacturer’s
designation for a rim by style or
code.
 Rim width
Nominal distance between rim
flanges.
 Section width
The linear distance between the
exteriors of the sidewalls of an
inflated tire, excluding elevations
due to labeling, decoration, or
protective bands.
 Sidewall
That portion of a tire between the
tread and bead.
 Sidewall separation
The parting of the rubber compound
from the cord material in the
sidewall.
 Snow tire
A tire that attains a traction index
equal to or greater than 110,
compared to the ASTM E1136-93
Standard Reference Test Tire,
when using the snow traction test as described in ASTM F-1805-00,

Standard Test Method for Single
Wheel Driving Traction in a Straight
Line on Snow-and Ice-Covered
Surfaces, and that is marked with
an Alpine Symbol “ ” on at least
one sidewall.
 Test rim
The rim on which a tire is fitted for
testing, and it may be any rim listed
as appropriate for use with that tire.
 Tread
That portion of a tire that comes into
contact with the road.
 Tread rib
A tread section running
circumferentially around a tire.
 Tread separation
Pulling away of th e tread from the
tire carcass.
 Treadwear indicators (TWI)
The projections within the principal
grooves designed to give a visual
indication of the degrees of wear of
the tread. 
Vehicle capacity weight
The rated cargo and luggage load
plus 150 lbs (68 kg) times the
vehicle’s designated seating
capacity.
 Vehicle maximum load on the
tire
Load on an individual tire that is
determined by distributing to each
axle its share of the maximum
loaded vehicle weight and dividing
by two.
 Vehicle normal load on the tire
Load on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal occu-
pant weight (distributed in accor-
dance with Table 1 that is appended
to the end of this section) and
dividing by 2.
 Wheel-holding fixture
The fixture used to hold the wheel
and tire assembly securely during
testing.BRZ_U.book 400 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Index
414GAWR (Gross Axle Weight Rating) .....................................P299
G-force .................................................................................P154
G-force (peak hold function).................................................P154
Glove box .............................................................................P214
GVWR (Gross Vehicle Weight Rating).................................P299HHazard warning flasher ............................................. P127, P302
Head restraint adjustment ......................................................P34
Headlight Aim adjustment ................................................................P374
Beam leveler....................................................................P182
Bulb replacement.............................................................P373
Bulb wattage ....................................................................P388
Control switch ..................................................................P174
Flasher.............................................................................P176
Indicator light ...................................................................P150
Welcome lighting function................................................P175
High Beam Assist Function ...........................................................................P177
Indicator light ...................................................................P150
High beam indicator light......................................................P150
High/low beam change (dimmer) .........................................P176
Hill start assist ......................................................................P257 Indicator light ...................................................................P150
To activate/deactivate............... .......................................P258
HomeLink
®...........................................................................P186 Hook
Towing and tie-down....................................................... P320
Horn..................................................................................... P195
Hose and connections ... ................................................ ...... P348
IIcy road surface warning light...... ........................................ P151
Illumination brightness control ............................................. P130
Immobilizer .......................................................................... P108
Indicator light (security indicato r light) ............................ P148
Indicator light BSD/RCTA OFF ............................................................. P150
BSD/RCTA warning ........................................................ P150
Cruise control.................................................................. P149
Cruise control set ............................................................ P149
Door open ....................................................................... P141
Drive mode ..................................................................... P148
Front passenger’s frontal airbag ON and OFF ....... P72, P135
Headlight......................................................................... P150
High beam ...................................................................... P150
High Beam Assist ........................................................... P150
Hill start assist........ ......................................................... P150
Malfunction ..................................................................... P136
RAB OFF ........................................................................ P151
REV ................................................................................ P130
Security ........................................................................... P148
Select lever/Gear position ....... ........................................ P149
Steering Responsive Headlight OFF .............................. P150
TRAC OFF ...................................................................... P142
BRZ_U.book 414 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Index
417
Index14
Remote control mirror switch ............................................... P194
Remote keyless entry system......................................... ..... P109
Replacing battery ............................................................ P376
Replacement Access key fob battery .................................................... P376
Air cleaner element .... ................................................ ..... P350
Battery of access key fob ................................................ P376
Brake pad and lining ....................................................... P356
Cabin air filter .................................................................. P205
Lost transmitters (remote keyl ess entry system) ............ P111
Wiper blades ................................................................... P367
Replacing bulbs ................................................................... P373 Backup light .................................................................... P373
Headlight ............ ........................................................ ..... P373
Trunk light ....................................................................... P374
REV indicator light and buzzer ............................................ P130
Reverse Automatic Braking (RAB) system .......................... P277
OFF indicator light........................................................... P151
ON/OFF setting ....... ..................................... ......... P151, P286
Warning indicator .... ..................................... ......... P151, P286
Rocking the vehicle ............................................................. P297
Roof antenna ....................................................................... P210SSafety Precautions when driving ............ ........................................ P5
Symbol ................................................................................ P4
Warnings ............................................................................. P3 Sealing flat tire ..................................................................... P306
Flat tire repair kit ............................................................. P309
How to seal ..................................................................... P310
Safety precautions .......................................................... P307
Seat Fabric .............................................................................. P335
Front .................................................................................. P30
Heater ............................................................................... P35
Height adjustment ............................................................. P33
Rear .................................................................................. P37
Seatbelt............................................................................P5, P39
Fastening .......................................................................... P41
Maintenance...................................................................... P43
Pretensioners .................................................................... P44
Safety tips ......................................................................... P39
Warning light and chime............... ................................... P131
Security Alarm system .................................................................. P114
Immobilizer .......... ........................................................ .... P108
Indicator light ................................................................... P148
Select lever Position indicator ............................................................. P149
Shift lock function ............................................................ P238
Settings display.................................................................... P157
Shoulder pretensioner ........................................................... P44
Snow tires ................................. .................................P296, P358
Snowy and icy roads............................................................ P295
Sounding a panic alarm ....................................................... P110
Spark plugs ............................... .................................P352, P385
BRZ_U.book 417 ページ ２０２２年３月２９日　火曜日　午後３時５９分