2006 Lexus IS250 flat tire

382
6-1. Specifications
Ty p e E
Ti r e s i z e
Front tires: 225/40R18 88Y
Rear tires: 255/40R18 95Y
Spare tire: T145/70R17 106M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditions Front tires:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear tires:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are per-
mitted by law) Add 7.2 psi (50 kPa, 0.5 kgf/cm
2 or bar) to
the front tires and rear tires. Never exceed the
maximum cold tire inflation pressure indicated
on the tire sidewall.
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size
Front wheels: 18  8J
Rear wheels: 18 8 1 /2J
Spare wheel: 17  4T
Wheel nut torque10.5 kgf•m (103 N•m, 76 ft•lbf)

387
6-1. Specifications
6
Vehicle specifications
Tire information
Ty p i c a l t i r e s y m b o l s
Tire size(P. 389)
DOT and Tire Identification Number (TIN) ( P. 388)
Location of tread wear indicators ( P. 390)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands
which form the plies in a tire.
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 an d 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. 3 9 2 )
Maximum cold tire inflation pressure ( P. 3 9 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.

392
6-1. Specifications
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive 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
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

393
6-1. Specifications
6
Vehicle specifications
Tire related termMeaning
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
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 asymmetrical tire that has a particular side that must always face
outward when mounted on a vehicle
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
Rim widthNominal distance between rim flanges

394
6-1. Specifications
*: Table 1  Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Tire related termMeaning
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
Designated seating
capacity, Number of occupantsVehicle normal load,
Number of occupantsOccupant distribution in
a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat

399
6
Vehicle specifications
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Pow e r w i n d ow
• After reconnecting or changing the battery
• After changing a fuse
P. 4 1
Engine oil maintenance
dataAfter changing engine oilP. 2 6 4
Tire inflation pressure
warning system
• When the standard tire pressure changes by replacing tires or wheels
• When tires are rotated
• When tire pressure sensors are
replaced
• When driving with the tires inflated to a higher than standard tire pressure
P. 2 76
After reconnecting or performing main tenance on the battery, the follow-
ing items must be initialized for normal system operation.

406
Alphabetical index
DoorsDoor glasses ............................................. 41
Door lock.................................................... 15
Side mirrors ............................................. 39
Driver's seat belt reminder light ...... 331
Driving Correct posture .................................... 55
Procedures .............................................. 82
Driving position memory ...................... 24
Electric power steering (EPS).......... 139
Electronic key If your electronic key battery is discharged ....................................359
Emergency, in case of If the engine will not start ...............356
If the shift lever cannot be shifted from P ................................... 357
If the vehicle has discharged battery .................................................. 362
If the warning buzzer sounds ...... 329
If the warning light turns on .......... 329
If the warning message is
displayed ............................................ 334
If you have a flat tire .........................348
If you lose your keys.........................358
If you think something is wrong ................................................... 325
If your electronic key battery is discharged ....................................359
If your vehicle becomes stuck..... 367
If your vehicle needs to be towed .................................................... 318
If your vehicle overheats ................365
Engine Compartment ....................................... 261 Engine switch ......................................... 89
Hood ....................................................... 258
How to start the engine .................... 89
If the engine will not start ............... 356
Overheating ........................................ 365
Engine compartment cover ............. 263
Engine coolant Capacity .................................................374
Checking............................................... 268
Preparing and checking before winter........................................151
Engine coolant temperature gauge ...................................................... 100
Engine immobilizer system ................. 50
Engine oil Capacity .................................................373
Checking................................................264
Preparing and checking before winter........................................151
Engine oil maintenance data ........... 267
EPS (Electric power steering) ..........139
Event data recorder ............................ 327
First-aid kit storage belt ..................... 230
Floor mat .................................................. 229
Fluid Brake ........................................................270
Washer.................................................... 274
Fog lights Switch .......................................................... 116
Wattage ................................................. 383
Foot well lighting.................................... 201
Front fog lights Switch .......................................................... 116
Wattage ................................................. 383
E
F

410
Alphabetical index
Smart access system with push-button startEntry function..............................................4
Starting the engine ............................... 89
Spare tire Inflation pressure................................285
Spare tire................................................348
Spark plug ................................................ 374
Specifications .........................................370
Speedometer Speed indicator ................................... 100
Speedometer........................................ 100
Steering wheel Audio switches .....................................199
Driving position memory...................24
Manual adjustment .............................. 36
Power adjustment .................................37
Storage feature......................................205
Stuck If your vehicle becomes stuck..... 367
Sun visors .................................................... 211
Sunshade Rear .......................................................... 225
Roof ............................................................. 45
Switch ECT switch .............................................. 93
Engine switch.......................................... 89
ETCS switch............................................ 96
Fog light switch ...................................... 116
Light switches ..........................................113
Power door lock switch ...................... 15
Power window switch .......................... 41
Satellite switches .................................. 214
Transmission shift switches.............. 94
Window lock switch ............................. 41
Wipers and washer switch ...............117 Tachometer
Tacho indicator ....................................100
Tachometer............................................100
Tail lights Switch .......................................................... 113
Theft deterrent system Alarm...........................................................52
Engine immobilizer system ............. 50
Theft prevention labels.......................... 54
Tire inflation pressure ......................... 285
Tire information Glossary .................................................392
Size ........................................................... 389
Tire identification number .............388
Uniform tire quality grading......... 390
Tires Chains....................................................... 153
Checking................................................275
If you have a flat tire ......................... 348
Inflation pressure ............................... 285
Inflation pressure sensor ................276
Information ........................................... 387
Replacing .............................................. 348
Rotating tires.........................................275
Size ........................................................... 378
Snow tires................................................ 154
Tools........................................................... 348
Total load capacity ................................ 150
Towing Dinghy towing ........................... 157, 158
Emergency towing ............................. 318
Trailer towing ........................................ 156
TRAC (Traction control).....................139
Traction control (TRAC).....................139
Transmission shift switches ....................94
Trip meter ................................................. 100T