inflation pressure Lexus IS250C 2012 Instrument cluster / LEXUS 2012 IS250C,IS350C (OM53A62U) Owner's Guide

583
6-1. Specifications
6
Vehicle specifications
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is
a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly filled in the tire. A
tube type tire has a tube inside the ti re and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure ( P. 443)
Maximum cold tire inflation pressure ( P. 5 7 2 )
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tire or all season tire (P. 443)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY” ( P. 523)
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded into its sidewall. This tire is designed for temporary
emergency use only.
Run-flat tire (RFT) or standard tire ( P. 585)
This vehicle can be equipped with ei ther run-flat tires (RFT) or standard
tires. A “RFT” or “DSST” mark is molded on the sidewall of the run-flat
tire.

588
6-1. Specifications
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Mo tor Vehicle Safety Standard No. 139.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excess ive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipp ed, air conditioning and
additional weight optional engine

589
6-1. Specifications
6
Vehicle specifications
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows
Production options
weight
The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty battery, and special trim
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle's designated seating capacity
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer.
RimA metal support for a tire or a tire and tube assembly
upon which the tire beads are seated
Rim diameter
(Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer's designation for a rim by
style or code
Tire related termMeaning

591
6-1. Specifications
6
Vehicle specifications
Bead
The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separationA breakdown of the bond between components in
the bead
Bias ply tire
A pneumatic tire in which the ply cords that extend to
the beads are laid at alternate angles substantially
less than 90 degrees to the centerline of the tread
CarcassThe tire structure, except tread and sidewall rubber
which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber com-
pounds
CrackingAny parting within the tread, sidewall, or innerliner of
the tire extending to cord material
CT
A pneumatic tire with an inverted flange tire and rim
system in which the rim is designed with rim flanges
pointed radially inward and the tire is designed to fit
on the underside of the rim in a manner that encloses
the rim flanges inside the air cavity of the tire
Extra load tire
A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire
GrooveThe space between two adjacent tread ribs
InnerlinerThe layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire
Innerliner separationThe parting of the innerliner from cord material in the
carcass
Tire related termMeaning

592
6-1. Specifications
Intended outboard side-
wall
(a) The sidewall that contains a whitewall, bears white lettering, or bear s manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other side-
wall of the tire, or
(b) The outward facing sidewall of an asymmetrical
tire that has a particular side that must always
face outward when mounted on a vehicle
Light truck (LT) tire
A tire designated by its manufacturer as primarily
intended for use on lightweight trucks or multipur-
pose passenger vehicles
Load ratingThe maximum load that a tire is rated to carry for a
given inflation pressure
Maximum load ratingThe load rating for a tire at the maximum permissible
inflation pressure for that tire
Maximum permissible
inflation pressureThe maximum cold inflation pressure to which a tire
may be inflated
Measuring rimThe rim on which a tire is fitted for physical dimension
requirements
Open spliceAny parting at any junction of tread, sidewall, or
innerliner that extends to cord material
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors of the side-
walls of an inflated tire, including elevations due to
labeling, decorations, or protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10000 lb. or
less.
PlyA layer of rubber-coated parallel cords
Tire related termMeaning

593
6-1. Specifications
6
Vehicle specifications
Ply separationA parting of rubber compound between adjacent
plies
Pneumatic tire
A mechanical device made of rubber, chemicals, fab-
ric and steel or other mate rials, that, when mounted
on an automotive wheel, provides the traction and
contains the gas or fluid that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that extend to
the beads are laid at substantially 90 degrees to the
centerline of the tread
Reinforced tire
A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire
Section width
The linear distance between the exteriors of the side-
walls of an inflated tire, excluding elevations due to
labeling, decoration, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe 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 E-1136 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 which is marked with an Alpine Symbol (
)
on at least one sidewall
Te s t r i mThe rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tire related termMeaning

600
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Maintenance data
(U.S.A. only)After the maintenance is performedP. 4 1 1
Tire pressure warning
system
• When changing the tire inflation pressure by changing traveling
speed.
• When changing the tire size.
P. 4 3 7
The following item must be initialized for normal system operation in cases
such as after the battery is reconnected, or maintenance is performed on
the vehicle.

627
Alphabetical index
Side mirrorAdjusting and folding ..........................79
Mirror position memory ..................... 61
Smart access system with push-button startEntry function ..........................................32
Starting the engine..............................148
“SOS” button ......................................... 394
Spare tire Inflation pressure ................................447
Storage location.................................. 518
Spark plug ............................................... 568
Specifications......................................... 560
Speedometer Speed indicator ....................................166
Speedometer ........................................166
Steering wheel Adjustment ...............................................76
Audio switches ................................... 306
Steering wheel positionmemory ................................................... 61
Storage feature ....................................... 361 Stuck
If your vehicle becomes stuck .... 545
Sun visors .................................................368
Switch All window control switch ................ 82
ECT switch............................................. 154
Emergency flasher switch ............ 486
Engine switch ........................................ 148
ETCS switch ............................................ 161
Fog light switch .................................... 185
Hazard light switch .......................... 486
Ignition switch ....................................... 148
Light switches ......................................... 181
Power door lock switch .................... 47
Power window switch ........................ 82
Roof switch...............................................86
Satellite switches...................................371
Transmission shift switches ......................................155, 157
Window lock switch............................83
Wiper and washer switch............... 187

628
Alphabetical index
TachometerTacho indicator.....................................166
Tachometer ............................................166
Tail lights Switch ......................................................... 181
Talk switch* .............................................332
Telephone switch*................................332
Theft deterrent system Alarm ........................................................ 100
Engine immobilizer system ............. 98
Theft prevention labels ........................ 103
Tire inflation pressure ......................... 447
Tire information Glossary................................................ 588
Size .......................................................... 585
Tire identification number .............584
Uniform tire quality grading ........ 586
Tires Chains ..................................................... 238
Checking ............................................... 437
If you have a flat tire ........................... 518
Inflation pressure................................ 447
Inflation pressure sensor................438
Information............................................582
Replacing ................................................ 518
Rotating tires ........................................ 437
Run-flat tire............................................ 527
Size ........................................................... 572
Snow tires .............................................. 238
Spare tire................................................. 518
Tools ............................................................ 518
Total load capacity ............................... 237 Towing
Dinghy towing ......................... 243, 244
Emergency towing ........................... 487
Trailer towing ....................................... 242
TRAC ..........................................................219
Traction control.......................................219
Transmission shift switches.......155, 157
Trip meter ..................................................166
Trunk Opener ....................................................... 51
Trunk light Trunk light .................................................52
Wattage ..................................................577
Turn signal lights Replacing light bulbs ........................475
Switch ........................................................ 162
Wattage ..................................................577
USB port* ................................................ 293
Vanity lights Vanity lights.......................................... 369
Wattage ..................................................577
Vanity mirrors ........................................ 369
VDIM...........................................................219
Vehicle dynamics integrated management .........................................219
Vehicle identification number...........561
Vehicle stability control .......................219
Ventilators ................................................377
Voice command switch* ................... 333
VSC .............................................................219T
U
V

632
GAS STATION INFORMATION
Auxiliary catch leverP. 4 1 9Trunk openerP. 5 1Fuel filler door P. 9 5
Hood lock release lever P. 4 1 9Fuel filler door openerP. 9 5Tire inflation pressureP. 5 7 2
Fuel tank capacity
(Reference)17.2 gal. (65 L, 14.3 Imp. gal.)
Fuel typeUnleaded gasoline only P. 96, 563
Cold tire inflation
pressureP. 5 7 2
Engine oil capacity
(Drain and refill 
reference)qt. (L, Imp. qt.)
Without filter 6.2 (5.9, 5.2)
With filter 6.6 (6.3, 5.5)
Engine oil typeP. 564