width Lexus IS250 2014 Do-it-yourself service precautions / LEXUS 2014 IS250,IS350 OWNERS MANUAL (OM53758U)

2094-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
Press the LDA switch to activate the
system.
The LDA indicator and lane lines will
come on.
Press the switch again to turn the LDA
system off.
The LDA system will remain on or off
even if the engine switch is turned to
IGNITION ON mode.
●When the vehicle speed is approximately 32 mph (50 km/h) or more
●When the lane width is more than approximately 8.2 ft. (2.5 m)
●When driving on a straight road or through a curve with a radius of more than
approximately 328 ft. (100 m)
Turning the LDA system on
Operating conditions

2224-5. Using the driving support systems
IS350/250_U (OM53758U)
■Screen description
The rear view monitor system screen will be displayed if the shift lever is
shifted to R while the engine switch is in IGNITION ON mode. Vehicle width guide lines
The line indicates a guide path when the vehicle is being backed straight up.
The displayed width is wider than the actual vehicle width.
Vehicle center guide lines
These lines indicate the estimated vehicle center on the ground.
Distance guide line
The line shows points approximately 1.5 ft. (0.5 m) (red) from the center of the
edge of the bumper.
Distance guide line
The line shows distance behind the vehicle, a point approximately 3 ft. (1 m) (blue)
from the edge of the bumper.
Using the rear view monitor system
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2
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4

2244-5. Using the driving support systems
IS350/250_U (OM53758U)
■Rear view monitor system camera
The camera for the rear view moni-
tor system is located above the
license plate.
●Using the camera
If the camera lens becomes dirty, it cannot transmit a clear image. If water
droplets, snow or mud adhere to the lens , rinse it with water and wipe with a
soft cloth. If the lens is extremely dirty, wash it with a mild cleanser and rinse.
■Differences between the screen and the actual road
The distance guide lines and the vehicl e width guide lines may not actually be
parallel with the dividing lines of the parking space, even when they appear to
be so. Be sure to check visually.
The distances between the vehicle width guide lines and the left and right
dividing lines of the parking space may not be equal, even when they appear
to be so. Be sure to check visually.
The distance guide lines give a distance guide for flat road surfaces. In any of
the following situations, there is a margin of error between the fixed guide
lines on the screen and the actual distance/course on the road.

2274-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
■Vehicle width guide lines
Visually check the surroundings and the area behind the vehicle. In the case
shown below, the truck appears to be outside of the vehicle width guide lines
and the vehicle does not look as if it hits the truck. However, the rear body of
the truck may actually cross over the vehicle width guide lines. In reality if you
back up as guided by the vehicle width guide lines, the vehicle may hit the
truck.
Vehicle width guide lines

4237-3. Do-it-yourself maintenance
7
Maintenance and care
IS350/250_U (OM53758U)
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 the following:
●Wheels of different sizes or types
●Used wheels
●Bent wheels that have been straightened
●Use only Lexus wheel nuts and wrenches designed for use with your alumi-
num 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.
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and transmit-
ters that allow the tire pressure warning system to provide advance warning in the event
of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning
valves and transmitters must be installed. ( P. 4 1 2 )
Wheels
If a wheel is bent, cracked or heavily corroded, it should be replaced. Other-
wise, the tire may separate from the wheel or cause a loss of handling control.
Wheel selection
Aluminum wheel precautions

500
IS350/250_U (OM53758U)9-1. Specifications
*1: Unladen vehicle
*2: Vehicles with 255/35R18 tires
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
Overall length183.7 in. (4665 mm)
Overall width71.3 in. (1810 mm)
Overall height*156.3 in. (1430 mm)
Wheelbase110.2 in. (2800 mm)
Tr e a d*1
Front60.4 in. (1535 mm)
Rear61.0 in. (1550 mm)
60.6 in. (1540 mm)
*2
Vehicle capacity weight (Occupants + lug-
gage)825 lb. (375 kg)

5169-1. Specifications
IS350/250_U (OM53758U)
■Typical tire size information
The illustration indicates typical tire
size. Tire use (P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index
(2 digits or 3 digits)
Speed symbol
(alphabet with one letter)
■Tire dimensions
Section width
Tire height
Wheel diameter
Tire size
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2
3

5189-1. Specifications
IS350/250_U (OM53758U)
This information has been prepared in acco rdance with regulations issued by the
National Highway Traffic Safety Administration of the U.S. Department of Trans-
portation.
It provides the purchasers and/or prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read this infor-
mation.
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Requirements in
addition to these grades. Quality grad es can be found where applicable on
the tire sidewall between tread shoulder and maximum section width.
For example: Treadwear 200 Traction AA Temperature A
■Tr e a d w e a r
The treadwear grade is a comparative rati ng based on the wear rate of the tire
when tested under controlled conditions on a specified government test
course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2) times as well on
the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use.
Performance may differ significantly from the norm due to variations in driving
habits, service practices and differences in road characteristics and climate.
■Tr a c t i o n A A , A , B , C
The traction grades, from highest to lowest, are AA, A, B and C, and they rep-
resent the tire’s ability to stop on we t pavement as measured under controlled
conditions on specified government te st surfaces of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking (straight
ahead) traction tests and does not include cornering (turning) traction.
Uniform Tire Quality Grading

5219-1. Specifications
9
Vehicle specifications
IS350/250_U (OM53758U)
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
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb. (68 kg)
times the vehicle’s designated seating capacity
Vehicle maximum load on
the tireThe load on an individual tire that is determined by dis-
tributing 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 dis-
tributing to each axle its sh are of curb weight, accessory
weight, and normal occupant weight (distributed 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
BeadThe 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 be tween components in the
bead
Bias ply tireA pneumatic tire in which the ply cords that extend to
the beads are laid at altern ate 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 th e plies in the tire
Cord separationThe parting of cords from adjacent rubber compounds
CrackingAny parting within the tread, sidewall, or innerliner of
the tire extending to cord material
Tire related termMeaning

5239-1. Specifications
9
Vehicle specifications
IS350/250_U (OM53758U)
Overall widthThe linear distance between the exteriors of the side-
walls of an inflated tire, including elevations due to label-
ing, decorations, or pr otective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipurpose
passenger vehicles, and trucks, that have a gross vehicle
weight rating (GVWR) of 10,000 lb. or less.
PlyA layer of rubber-coated parallel cords
Ply separationA parting of rubber compound between adjacent plies
Pneumatic tire
A mechanical device made of rubber, chemicals, fabric
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 Ref-
erence Test Tire, when using the snow traction test as
described in ASTM F-1805-00, Standard Test Method
for Single Wheel Driving Tract ion 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