weight Lexus IS250C 2014 User Guide

443
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS250C/350C_U
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel efficiency
●Reduced driving comfort and tire life
●Reduced safety
●Damage to the drive train
If a tire needs frequent refilling, have it checked by your Lexus dealer.
■Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following:
●Check only when the tires are cold.
If your vehicle has been parked for at least 3 hours and has not been driven for
more than 1 mile or 1.5 km, you will get an accurate cold tire inflation pressure
reading.
●Always use a tire pressure gauge.
The appearance of the tire can be misleading. In addition, tire inflation pressures
that are even just a few pounds off can degrade ride and handling.
●Do not bleed or reduce tire inflation press ure after driving. It is normal for the
tire inflation pressure to be higher after driving.
●Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is bal-
anced.

445
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS250C/350C_U
Wheels
■When replacing wheels
The wheels of your Lexus are equipped with tire pressure warning valves and trans-
mitters that allow the tire pressure warning system to provide advanced warning in
the event of a loss in tire inflation pressure. Whenever wheels are replaced, the tire
pressure warning valves and transmitters must be installed. (→P. 4 3 2 )
If a wheel is bent, cracked or heavily corroded, it should be replaced. Oth-
erwise, the tire may separate from the wheel or cause loss of handling con-
trol.
■Wheel selection
When replacing wheels, care should be taken to ensure that they
are equivalent to those removed in load capacity, diameter, rim
width, and inset
*.
Replacement wheels are available at your Lexus dealer.
*: Conventionally referred to as “offset”.
Lexus does not recommend using:
● Wheels of different sizes or types
● Used wheels
● Bent wheels that have been straightened
■ Aluminum wheel precautions
●Use only Lexus wheel nuts and wrenches designed for use with
your aluminum wheels.
● When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
● Be careful not to damage the aluminum wheels when using tire
chains.
● Use only Lexus genuine balance weights or equivalent and a
plastic or rubber hammer when balancing your wheels.

552
IS250C/350C_U
6-1. Specifications
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
*1: Unladen vehicle
*2: Vehicle with 17 inch disk wheels
*3: Vehicle with 18 inch disk wheels
Overall length182.5 in. (4635 mm)
Overall width70.9 in. (1800 mm)
Overall height *155.7 in. (1415 mm)
Wheelbase107.4 in. (2730 mm)
Tr e a d
Front60.4 in. (1535 mm)
Rear60.4 in. (1535 mm)*2
60.0 in. (1525 mm)*3
Vehicle capacity weight
(Occupants + luggage)660 lb. (295 kg)

579
6-1. Specifications
6
Vehicle specifications
IS250C/350C_U■
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 Motor 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 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 equipped, air conditioning and
additional weight optional engine

580
6-1. Specifications
IS250C/350C_U
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

581
6-1. Specifications
6
Vehicle specifications
IS250C/350C_U
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 by two
We a t h e r s i d eThe surface area of the rim not covered by the
inflated tire
Tire related termMeaning

583
6-1. Specifications
6
Vehicle specifications
IS250C/350C_U
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
Tire related termMeaning

608
IS250C/350C_U
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
ABSAnti-lock Brake System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
CRSChild Restraint System
DISPDisplay
ECTElectronic Controlled Transmission
ECUElectronic Control Unit
EDREvent Data Recorder
ELREmergency Locking Retractor
EPSElectric Power Steering
ETCSElectronic Throttle Control System
GAWRGross Axle Weight Rating
I/MEmission inspection and maintenance
LATCHLower Anchors and Tethers for Children
LEDLight Emitting Diode
MMTMethylcyclopentadienyl Manganese Tricarbonyl
M + SMud and Snow
MTBEMethyl Tertiary Butyl Ether
OBDOn Board Diagnostics
PCSPre-Collision System
SRSSupplemental Restraint System
TINTire Identification Number
TPMSTire Pressure Warning System
TRACTr a c t i o n C o n t r o l
VDIMVehicle Dynamics Integrated Management

621
Alphabetical index
IS250C/350C_U
Warning buzzersBrake system ......................................... 491
Open door .......................................... 493
Seat belt reminder ............................ 493
Warning lights Anti-lock brake system .................. 492
Brake assist system .......................... 492
Brake system ......................................... 491
Charging system ................................. 491
Electric power steering system
warning light ..................................... 492
Low fuel level....................................... 493
Malfunction indicator lamp .......... 492
Master warning light ........................ 493
Open door ........................................... 493
Pre-collision system ......................... 492
Pretensioners ...................................... 492
Seat belt reminder light .................. 493
SRS airbags .......................................... 492
Tire pressure warning
light........................................................ 493
Warning messages
Dynamic radar cruise control ........................501, 503
Engine oil level ....................................503
Engine oil maintenance..................503
Engine oil pressure.......................... 500
Hood .......................................................503
Intuitive parking assist ..........501, 503
Open door ...........................................503
Parking brake ......................................503
Pre-collision system ..............501, 503
Retractable hardtop ..............501, 503 Smart access system with
push-button start ............................. 510
Steering lock.......................................... 501
Trunk ....................................................... 503
Washer fluid ........................................ 503
Washer
Checking .............................................. 430
Preparing and checking before winter ....................................233
Switch........................................................ 182
Washing and waxing ........................... 396
Weight Cargo capacity ................................... 229
Load limits ............................................. 232
Weight.....................................................552
Wheels ...................................................... 445
Window glasses ...................................... 82
Window lock switch ...............................83
Windows Power windows ..................................... 82
Rear window defogger.................... 251
Washer .................................................... 182
Windshield wiper de-icer.................. 252
Windshield wipers................................. 182
Wireless remote control key Replacing the battery.......................449
WMA disc* ...............................................271W
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.