2009 Lexus IS250 flat tire

456
6-1. Specifications
08_IS350/250_U_(L/O_0808)
Tire related termMeaning
Rim widthNominal distance between rim flanges
Vehicle maximum load on
the tireThe 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
The load on an individual tire that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight (dis-
tributed in accordance with Table 1
* below), and
dividing it by two
We a t h e r s i d eThe surface area of the rim not covered by the
inflated tire

457
6-1. Specifications
6
Vehicle specifications
08_IS350/250_U_(L/O_0808)
Tire related termMeaning
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

458
6-1. Specifications
08_IS350/250_U_(L/O_0808)
Tire related termMeaning
Intended outboard side-
wall
(a) The sidewall that contains a whitewall, bears
white lettering, or bears 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

459
6-1. Specifications
6
Vehicle specifications
08_IS350/250_U_(L/O_0808)
Tire related termMeaning
Ply separationA parting of rubber compound between adjacent
plies
Pneumatic tire
A mechanical device made of rubber, chemicals, fab-
ric and steel or other materials, 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

467
6
Vehicle specifications
08_IS350/250_U_(L/O_0808)
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Engine oil maintenance
dataAfter changing engine oilP. 3 1 3
Tire pressure warning
system
• When rotating the tires differing with front and rear tire inflation pressures.
• When changing the tire inflation pressure by changing traveling
speed.
• When changing the tire size.
P. 3 2 6
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.

478
Alphabetical index
08_IS350/250_U_(L/O_0808)
Cruise control
Cruise control .......................................166
Dynamic radar cruise control .......170
Cup holder ..............................................254
Curtain shield airbags............................84
Customizable features ........................ 461
Daytime running light system ........... 157
Defogger
Rear window..........................................218
Side mirror ..............................................218
Dimension ................................................430
Dinghy towing ............................ 205, 206
Display
Dynamic radar cruise control .......170
Satellite switch mode .......................260
Trip information .................................... 152
Warning message............................. 392
Do-it-yourself maintenance .............304
Door courtesy lights
Door courtesy lights..........................247
Wattage.................................................. 445
Door pockets..........................................256
Doors
Door glasses ........................................... 69
Door lock.................................24, 36, 39
Side mirrors ............................................. 66
Driver's seat belt reminder light .... 385
Driving
Correct posture .................................... 82
Procedures .............................................. 116
Driving position memory ......................48 Electric power steering....................... 186
Electronic key
If the electronic key does not
operate properly.............................. 417
Emergency, in case of
If the engine will not start ................. 413
If the shift lever cannot be shifted from P..................................... 415
If the vehicle has discharged battery ................................................... 421
If the warning buzzer sounds...... 383
If the warning light turns on.......... 383
If the warning message is displayed .............................................392
If you have a flat tire ........................ 404
If you lose your keys .......................... 416
If you think something is wrong ...................................................379
If the electronic key does not operate properly.............................. 417
If your vehicle becomes stuck ..... 427
If your vehicle needs to be towed ....................................................373
If your vehicle overheats.................424
Emergency flashers
Switch ....................................................... 372
Engine
Compartment ....................................... 310
Engine switch ........................................ 126
Hood ....................................................... 307
How to start the engine ................... 126
Identification number ........................ 431
If the engine will not start ................. 413
Ignition switch ....................................... 126
Overheating .........................................424
D
E

483
Alphabetical index
08_IS350/250_U_(L/O_0808)
Shift leverAutomatic transmission......................131
If the shift lever cannot be shifted from P..................................... 415
Manual transmission .......................... 137
Shift lever lighting.................................. 247
Shift lock system ..................................... 415
Shopping bag hooks ............................278
Side airbags ............................................... 84
Side marker lights
Switch ........................................................156
Side mirror
Adjusting and folding ......................... 66
Mirror position memory ................... 48
Smart access system with push-button start
Entry function .......................................... 24
Starting the engine.............................. 126
Spare tire Inflation pressure ............................... 336
Storage location................................. 404
Spark plug ............................................... 435
Specifications......................................... 430
Speech command switch*
Speedometer Speed indicator .................................... 142
Speedometer ........................................ 142 Steering wheel
Audio switches....................................245
Manual adjustment............................... 62
Power adjustment................................. 63
Steering wheel positionmemory .................................................. 48
Storage feature....................................... 251
Stuck If your vehicle becomes stuck ..... 427
Sun visors ................................................. 257
Sunshade Rear........................................................... 273
Roof.............................................................. 72
Switch
ECT switch..............................................132
Emergency flasher switch ............. 372
Engine switch .........................................126
ETCS switch .......................................... 138
Fog light switch .................................... 159
Hazard light switch ........................... 372
Ignition switch ........................................126
Light switches ....................................... 156
Power door lock switch .................... 39
Power window switch ........................69
Satellite switches................................ 260
Transmission shift switches ............ 134
Window lock switch............................69
Wipers and washer switch ............ 160
*: Refer to the “Navigation System Owner’s Manual”

484
Alphabetical index
08_IS350/250_U_(L/O_0808)
Tachometer
Tacho indicator..................................... 142
Tachometer ............................................ 142
Tail lights
Switch ....................................................... 156
Talk switch*
Telephone switch*
Theft deterrent system
Alarm .......................................................... 79
Engine immobilizer system .............. 77
Theft prevention labels ........................... 81
Tire inflation pressure .........................336
Tire information
Glossary................................................. 454
Size .............................................................451
Tire identification number ...............451
Uniform tire quality grading ......... 452
Tires
Chains .....................................................200
Checking ............................................... 325
If you have a flat tire ..........................404
Inflation pressure................................ 336
Inflation pressure sensor................ 327
Information............................................ 449
Replacing ...............................................404
Rotating tires ........................................ 325
Size ........................................................... 439
Snow tires ..............................................200
Tools ...........................................................404
Total load capacity ................................ 199Towing
Dinghy towing ........................205, 206
Emergency towing ............................373
Trailer towing ...................................... 204
TRAC ......................................................... 186
Traction control...................................... 186
Transmission shift switches.................134
Trip meter ..................................................142
Trunk
Extending a space .............................275
Opener ...................................................... 43
Trunk light
Trunk light ................................................. 44
Wattage ................................................. 445
Turn signal lights
Replacing light bulbs ....................... 363
Switch ........................................................ 139
Wattage ................................................. 445
Vanity lights
Vanity lights.......................................... 258
Wattage ................................................. 445
Vanity mirrors ........................................ 258
VDIM.......................................................... 186
Vehicle dynamics integrated
management ........................................ 186
Vehicle identification number ...........431
Vehicle stability control ...................... 186
Ventilators ............................................... 269
VSC ............................................................ 186
T
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