tires LEXUS IS250 2016 Owner's Manual

340
4-3. Do-it-yourself maintenance
Wheels
nWhen 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. 3 2 7 )
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.
nWheel selection
When replacing wheels, care should be taken to ensure that they
are equivalent to those removed in load capacity, diameter, rim
width, and offset.
Replacement wheels are available at your Lexus dealer.
Lexus does not recommend using:
lWheels of different sizes or types
lUsed wheels
lBent wheels that have been straightened
nAluminum wheel precautions
lUse only Lexus wheel nuts and wrenches designed for use with
your aluminum wheels.
lWhen rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
lBe careful not to damage the aluminum wheels when using tire
chains.
lUse only Lexus genuine balance weights or equivalent and a
plastic or rubber hammer when balancing your wheels.

341
4-3. Do-it-yourself maintenance
4

Maintenance and care
CAUTION
nWhen replacing wheels
lDo not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in loss of handling control.
lNever use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
NOTICE
nReplacing tire inflation pressure warning valves and transmitters
lBecause tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer.
lEnsure that only Genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-
genuine wheels.

5

When trouble arises
379
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
nVisible symptoms
lFluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
lFlat-looking tires or uneven tire wear
lEngine coolant temperature gauge needle continually points
higher than normal
nAudible symptoms
lChanges in exhaust sound
lExcessive tire squeal when cornering
lStrange noises related to the suspension system
lPinging or other noises related to the engine
nOperational symptoms
lEngine missing, stumbling or running rough
lAppreciable loss of power
lVehicle pulls heavily to one side when braking
lVehicle pulls heavily to one side when driving on a level road
lLoss of brake effectiveness, spongy feeling, pedal almost touches
the floor

5

When trouble arises
387
5-2. Steps to take in an emergency
nIf the malfunction indicator lamp comes on while driving
First check the following:
lIs the fuel empty?
If it is, fill the fuel tank immediately.
lIs the fuel tank cap loose?
If it is, tighten it securely.
The lamp will go off after taking several driving trips.
If the lamp does not go off even after several trips, contact your Lexus dealer as
soon as possible.
nElectric power steering warning light
When the battery is low or when the voltage drops temporarily, the electric power
steering warning light may come on.
nFront passenger detection sensor and passenger seat belt reminder and warning
buzzer
lIf luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and the warning buzzer to sound,
even if a passenger is not sitting in the seat.
lIf a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
nWhen the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pressing the
satellite switch does not turn off the tire pressure warning light.
nThe tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
nWhen a tires is replaced with a spare tire
The compact spare tire is not equipped with the tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off even
though the flat tire is replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.

388
5-2. Steps to take in an emergency
nIf the tire pressure warning system is inoperative
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
lIf tires not equipped with tire pressure warning valves and transmitters are used
lIf the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
lIf a different set of tires has been selected using the satellite switch.
lIf the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
lIf electronic devices or facilities using similar radio wave frequencies are nearby
lIf a radio set at similar frequencies is in use in the vehicle
lIf there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings
lIf non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
lIf tire chains are used
nIf the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.

5

When trouble arises
389
5-2. Steps to take in an emergency
CAUTION
nWhen the electric power steering warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, firmly hold and
operate it using more force than usual.
nIf the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
lStop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
lIf the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If the tire is flat,
change to the spare tire and have the flat tire repaired by the nearest Lexus
dealer.
lAvoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
nIf a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

390
5-2. Steps to take in an emergency
CAUTION
nMaintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and loading information
label). (If your vehicle has tires of a different size than the size indicated on the vehi-
cle placard or tire inflation pressure label [tire and loading information label], you
should determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when the system is not operating properly. The
TPMS (tire pressure warning system) malfunction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacement or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

406
5-2. Steps to take in an emergency
Replacing a flat tire
Chock the tires.
Slightly loosen the wheel nuts (one
turn).
Turn the tire jack portion “A” by
hand until the notch of the jack is in
contact with the jack point.
STEP1
Flat tireWheel chock
positions
Front
Left-hand
side
Behind the
rear right-
hand side tire
Right-
hand side
Behind the
rear left-
hand side tire
Rear
Left-hand
side
In front of the
front right-
hand side tire
Right-
hand side
In front of the
front left-
hand side tire
STEP2
STEP3

5

When trouble arises
409
5-2. Steps to take in an emergency
nThe compact spare tire
lThe compact spare tire is identified by the label “TEMPORARY USE ONLY”
on the tire sidewall.
Use the compact spare tire temporarily only in an emergency.
lMake sure to check the tire pressure of the compact spare tire. (→P. 43 9 )
nWhen using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be warned. Also, if you
replace the compact spare tire after the tire pressure warning light comes on, the
light remains on.
nIf you have a flat rear tire on a road covered with snow or ice
Install the compact spare tire on the front of the vehicle. Perform the following steps
and fit tire chains to the rear tires.
Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehi-
cle.
Fit tire chains to the rear tires.
nAfter completing the tire change
The tire pressure warning system must be reset. (→P. 3 2 7 )
STEP1
STEP2
STEP3

410
5-2. Steps to take in an emergency
CAUTION
nUsing the tire jack
Improper use of the tire jack may lead to death or injuries due to the vehicle sud-
denly falling off the jack.
lDo not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
lOnly use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires
on this vehicle.
lAlways check that the tire jack is securely set to the jack point.
lDo not put any part of your body under the vehicle supported by a jack.
lDo not start or run the engine while your vehicle is supported by the jack.
lDo not raise the vehicle while someone is in it.
lWhen raising the vehicle, do not put an object on or under the jack.
lDo not raise the vehicle to a height greater than that required to replace the tire.
lUse a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.
nReplacing a flat tire
Observe the following precautions to reduce the risk of death or serious injury.
lNever use oil or grease on the wheel bolts or wheel nuts.
The oil or grease can cause the wheel nuts to loosen, causing a serious accident.
Remove any oil or grease on the wheel bolts or wheel nuts.
lHave the wheel nuts tightened with a torque wrench to 76 ft