2015 Lexus IS250 spare

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IS350/250_U (OM53C50U)Please note that this manual applies to all
models and explains all equipment, including
options. Therefore, you may find some expl anations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual pr oduct improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, the vehicle show n in the illustrations may differ from your
vehicle in terms of color and equipment.
Approximately five hours after the engine is turned off, you may hear sound coming from
under the vehicle for several minutes. This is the sound of a fuel evaporation leakage
check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for Lexus vehicles are cur-
rently available in the market. You should know that Toyota does not warrant these prod-
ucts and is not responsible for their performance, repair, or replacement, or for any
damage they may cause to, or adverse effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus products. Modification with
non-genuine Lexus products could affect its performance, safety or durability, and may
even violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
The installation of a mobile two-way radio sy stem in your vehicle could affect electronic
systems such as:
●Multiport fuel injection system/sequential multiport fuel injection system
●Dynamic radar cruise control system
●Cruise control system
●Anti-lock brake system
●Vehicle dynamics in tegrated management
●SRS airbag system
●Seat belt pretensioner system
Be sure to check with your Lexus dealer fo r precautionary measures or special instruc-
tions regarding insta llation of a mobile two-way radio system.
For your information
Main Owner’s Manual
Noise from under vehicle after turning off the engine
Accessories, spare parts and modification of your Lexus
Installation of a mobile two-way radio system

1113-2. Opening, closing and locking the doors and trunk
3
Operation of each component
IS350/250_U (OM53C50U)
■Tr u n k l i g h t
The trunk light turns on when the trunk is opened.
■Function to prevent the trunk being locked with the electronic key inside
●When all doors are locked, closing the trunk lid with the electronic key left inside the
trunk will sound an alarm.
In this case, the trunk lid can be opened pressing the trunk release button on the trunk
lid.
●If the spare electronic key is put in the trunk with all the doors locked, the key confine-
ment prevention function is activated so the trunk can be opened. In order to prevent
theft, take all electronic keys with you when leaving the vehicle.
●If the electronic key is put in the trunk with all the doors locked, the key may not be
detected depending on the location of the key and the surrounding radio wave condi-
tions. In this case, the key confinement prevention function cannot be activated, causing
the doors to lock when the trunk is closed. Make sure to check where the key is before
closing the trunk.
●The key confinement prevention function canno t be activated if any one of the doors is
unlocked. In this case, open the trunk using the trunk opener.
■Internal trunk release lever
■Using the mechanical key
The trunk can be also opened using the mechanical key. ( P. 4 9 9 )
■If the smart access system with push-butto n start or the wireless remote control does
not operate properly
Use the mechanical key to unlock the trunk. ( P. 499)
Replace the key battery with a new one if it is depleted. ( P. 4 3 9 )
■When leaving a key to the vehi cle with a parking attendant
 P. 1 0 0
■Customization
The trunk unlocking operation can be changed. (Customizable features: P. 5 3 7 )
The trunk lid can be open
ed by pulling the glow-
in-the-dark lever located on the inside of the
trunk lid to the side.
The lever will continue to glow for some time
after the trunk lid is closed.

1183-2. Opening, closing and locking the doors and trunk
IS350/250_U (OM53C50U)
■When the vehicle is not driven for extended periods
●To prevent theft of the vehicle, do not leave the electronic key within 6 ft. (2 m) of the
vehicle.
●The smart access system with push-button start can be deactivated in advance.
(  P. 5 3 7 )
■To operate the system properly
●Make sure to carry the electronic key when operating the system. Do not get the elec-
tronic key too close to the vehicle when op erating the system from the outside of the
vehicle.
Depending on the position and holding condit ion of the electronic key, the key may not
be detected correctly and the system may no t operate properly. (The alarm may go off
accidentally, or the door lock prev ention function may not operate.)
●Do not leave the electronic key inside the luggage compartment.
The key confinement prevention function ma y not operate, depending on the location
of the key (close to a spare tire, the inside edge of the luggage compartment), condi-
tions (inside a metal bag, close to metallic objects) and the radio waves in the surround-
ing area. ( P. 111)
■If the smart access system with push-button start does not operate properly
●Locking and unlocking the doors and open ing the trunk: Use the mechanical key.
(  P. 499)
●Starting the engine:  P. 5 0 0
■Customization
Settings (e. g. smart access system with push-button start) can be changed.
(Customizable features: P. 5 3 7 )
■If the smart access system with push-butto n start has been deactivated in a customized
setting
●Locking and unlocking the d oors and opening the trunk:
Use the wireless remote control or mechanical key. ( P. 103, 109, 499)
●Starting the engine and changing engine switch modes: P. 5 0 0
●Stopping the engine: P. 1 5 9

2124-5. Using the driving support systems
IS350/250_U (OM53C50U)
●When driving on roads that are branching or merging
●When driving on a road surface that is wet du e to rain, previous rainfall, standing water,
etc.
●When the vehicle experiences strong up-and -down motion such as when driving on an
extremely rough road or on a seam in the pavement
●When headlight brightness at nighttime is reduced due to dirt on the lenses, or when
the headlights are misaligned
●When driving on winding roads or roads that are uneven
●When driving on rough or unpaved roads
■When changing the tires
Depending on the tires used, sufficient performance may not be maintainable.
■Warning messages for the LDA system
Warning messages are used to indicate a syst em malfunction or to inform the driver of
the need for caution while driving. ( P. 4 76 )
CAUTION
■Before using the LDA system
Do not rely solely on the LDA system. The LDA system does not drive the vehicle auto-
matically, nor does it reduce the amount of care you need to take. As such, the driver
must always assume full responsibility for understanding his/her surroundings, for
operating the steering wheel to correct the driving line, and for driving safely.
Inappropriate or negligent drivin g could lead to an accident.
■To avoid operating the LDA by mistake
Switch the LDA system off using the LDA switch when not in use.
■Situations unsuitable for LDA system
Do not use the LDA system in any of the following situations.
Otherwise, the system may not function correctly and could result in an accident.
●When driving with tire chains, a spare tire, or similar equipment
●When there are objects or structures along the roadside that might be misinterpreted
as lane markers (such as guardrails, a curb, reflector posts, etc.)
●When driving on snowy roads
●When pavement lane markers are difficult to see due to rain, snow, fog, sand dust, etc.
●When there are visible lines on the pavement from road repairs, or if the remains of
old lane markers are still visible on the road
●When driving on a road with lane closures due to maintenance, or when driving in a
temporary lane

3005-5. Playing an audio CD and MP3/WMA/AAC discs
IS350/250_U (OM53C50U)
NOTICE
■Discs and adapters that cannot be used
Do not use the following types of discs.
Also, do not use 3 in. (8 cm) disc ad apters, Dual Discs or printable discs.
Doing so may damage the player and/or disc insert/eject function.
●Discs that have a diameter that is not 4.7 in. (12 cm).
●Low-quality or deformed discs.
●Discs with a transparent or translucent recording area.
●Discs that have tape, stickers or CD-R labels attached to them, or that have had the
label peeled off.
■Player precautions
Failure to follow the precautions below may result in damage to the discs or the player
itself.
●Do not insert anything other th an discs into the disc slot.
●Do not apply oil to the player.
●Store discs away from direct sunlight.
●Never try to disassemble any part of the player.

4237-3. Do-it-yourself maintenance
7
Maintenance and care
IS350/250_U (OM53C50U)
New tread
Treadwear indicator
Wo r n t r e a d
The location of treadwear indicators is
shown by the “TWI” or “” marks, etc.,
molded on the sidewall of each tire.
Check spare tire condition and pressure
if not rotated.
Vehicles with front and rear tires of the same size
Rotate the tires in the order shown.
To equalize tire wear and extend tire life,
Lexus recommends that tire rotation is
carried out at the same interval as tire
inspection.
Do not fail to initialize the tire pressure
warning system after tire rotation.
Vehicles with front and rear tires of differing sizes
Tires cannot be rotated.
Tires
Replace or rotate tires in accordance with maintenance schedules and tread-
wear.
Checking tires
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2
3
Tire rotation
Front

4307-3. Do-it-yourself maintenance
IS350/250_U (OM53C50U)
CAUTION
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drivetrain as well as dangerous han-
dling characteristics, which may lead to an accident resulting in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
●Do not tow if your vehicle has a compact spare tire installed.
■When initializing the tire pressure warning system
Do not operate the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the specified level. Otherwise, the tire pressure warning light may
not come on even if the tire inflation pressu re is low, or it may come on when the tire
inflation pressure is actually normal.
■Caution regarding interference with electronic devices
●Users of any electrical medical device other than implantable cardiac pacemakers,
cardiac resynchronization therapy-pacemakers or implantable cardioverter defibril-
lators should consult the ma nufacturer of the device for information about its opera-
tion under the influence of radio waves.
Radio waves could have unexpected effe cts on the operation of such medical
devices.
●People with implantable cardiac pacemakers,
cardiac resynchronization therapy-pacemak-
ers or implantable cardioverter defibrillators
should not come within 17.7 in. (450 mm) of
the tire pressure warning system initiators.
The radio waves may affect the operation of
such devices.

4337-3. Do-it-yourself maintenance
7
Maintenance and care
IS350/250_U (OM53C50U)
Tire valve
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust the pres-
sure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and adjustment,
apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure ev ery two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drivetrain
If a tire needs frequent inflating, have it checked by your Lexus dealer.
Inspection and adjustment procedure
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