2014 Lexus IS250 Service

4357-3. Do-it-yourself maintenance
7
Maintenance and care
IS250_EE(OM53C51E)
NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves, transmitters and
tire valve caps (vehicles with a tire pressure warning system)
●When removing or fitting the wheels, tires or the tire pressure warning valves and
transmitters, contact any authorized Lexus dealer or repairer, or another duly quali-
fied and equipped professional as the tire pressure warning valves and transmitters
may be damaged if not handled correctly.
●Make sure to install the tire valve caps. If the tire valve caps are not installed, water
could enter the tire pressure warning valves and the tire pressure warning valves
could be bound.
●When replacing tire valve caps, do not use tire valve caps other than those specified.
The cap may become stuck.
■To avoid damage to the tire pressure warning valves and transmitters (vehicles with a
tire pressure warning system)
When a tire is repaired with liquid sealants, the tire pressure warning valve and trans-
mitter may not operate properly. If a liquid sealant is used, contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional or other
qualified service shop as soon as possible. Make sure to replace the tire pressure warn-
ing valve and transmitter when replacing the tire. (→P. 4 2 8 )
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes.
These conditions may cause losses in tire inflation pressure, reducing the cushioning
ability of the tires. In addition, driving on rough roads may cause damage to the tires
themselves, as well as the vehicle’s wheels and body.
■Low profile tires (except 16-inch tires)
Low profile tires may cause greater damage than usual to the tire wheel when sustain-
ing impact from the road surface. Therefore, pay attention to the following:
●Be sure to use proper tire inflation pressure. If tires are under-inflated, they may be
damaged more severely.
●Avoid potholes, uneven pavement, curbs and other road hazards. Failure to do so
may lead to severe tire and wheel damage.
■If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

4397-3. Do-it-yourself maintenance
7
Maintenance and care
IS250_EE(OM53C51E)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the Owner’s
Manual, as this may result in a loss of handling control.
●Never 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
■Replacing tire pressure warning valves and transmitters (vehicles with a tire pressure
warning system)
●Because tire repair or replacement may affect the tire pressure warning valves and
transmitters, make sure to have tires serviced by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional or other qualified ser-
vice shop. In addition, make sure to purchase your tire pressure warning valves and
transmitters at any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
●Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-genu-
ine wheels.

4417-3. Do-it-yourself maintenance
7
Maintenance and care
IS250_EE(OM53C51E)
Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “↑UP” marks shown on the filter
and the filter case should be pointing up.
■Checking interval
Inspect and replace the air conditioning filter according to the maintenance schedule. In
dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance information, please refer to the “Lexus Service Booklet” or
“Lexus Warranty Booklet”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
5
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.

468
IS250_EE(OM53C51E)8-2. Steps to take in an emergency
The following may indicate a problem with your transmission. Contact any
authorized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional or commercial towing service before towing.
●The engine is running but the vehicle will not move.
●The vehicle makes an abnormal sound.
If your vehicle needs to be towed
If towing is necessary, we recommend having your vehicle towed by any
authorized Lexus dealer or repairer, or another duly qualified and equipped
professional or commercial towing service, using a lift-type truck or flatbed
truck.
Use a safety chain system for all towing, and abide by all state/provincial and
local laws.
Situations needs to contact dealers before towing

5429-1. Specifications
IS250_EE(OM53C51E)
Oil viscosity (0W-20 is explained here as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows cold
startability. Oils with a lower value before the W allow for easier starting of
the engine in cold weather.
• The 20 in 0W-20 indicates the viscosity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme load conditions.
How to read oil container labels:
Either or both API registered marks are added to some oil containers to help
you select the oil you should use.
API Service Symbol
Top portion: “API SERVICE SN”
means the oil quality designation by
American Petroleum Institute (API).
Center portion: “SAE 0W-20”
means the SAE viscosity grade.
Lower portion: “Resource-
Conserving” means that the oil has
fuel-saving and environmental pro-
tection capabilities.
ILSAC Certification Mark
The International Lubricant Specification Advisory Committee (ILSAC) Certifica-
tion Mark is displayed on the front of the container.
1
2

577Alphabetical index
IS250_EE(OM53C51E)
Maintenance
Do-it-yourself maintenance ...........413
Maintenance data............................. 538
Maintenance requirements ............. 411
Malfunction indicator lamp .............. 476
Master warning light ........................... 478
Meter
Changing the display.......................... 97
Indicators .................................................. 92
Instrument panel light control......... 98
Meters ........................................................ 95
Multi-information display ................ 100
Warning lights .......................................... 91
Mirrors
Inside rear view mirror....................... 161
Outside rear view mirror
defoggers........................................... 382
Outside rear view mirrors...............163
Vanity mirrors..................................... 398MirrorLink........................................... 369
MMS (Multimedia messaging
service) .................................................. 353
Moon roof .................................................170
Door lock linked moon roof
operation................................................ 171
Jam protection function ..................... 171
Operation ............................................... 170
MP3 disc....................................................319
Multi-information display ................... 100
Audio system-linked......................... 100
Drive information.................................. 101
Dynamic radar cruise
control ..................................................229
LDA (Lane Departure Alert) .......242
Navigation system-linked .............. 100
Settings ..................................................... 102
Switching the display .......................... 101
Warning message ............................ 482
M
*: For vehicles with a navigation or multimedia system, refer to
“NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

581Alphabetical index
IS250_EE(OM53C51E)
Sensor
Automatic headlight system......... 207
Automatic High Beam system...... 212
Inside rear view mirror......................162
Intrusion sensor and tilt sensor ...... 86
LDA (Lane Departure Alert).........241
Lexus parking assist-sensor ......... 247
Radar sensor ................ 236, 272, 282
Rain-sensing windshield
wipers.....................................................219
Service reminder indicators................90
Shift lever....................................................197
Automatic transmission ....................197
If the shift lever cannot be
shifted from P ................................... 523
Shift lock system .................................... 523
Shift position and gear position.......... 95
Side airbags..................................................41Side mirrors ..............................................163
Adjusting and folding ........................ 163
BSM (Blind Spot Monitor) ........... 278
Linked mirror function when
reversing ..............................................165
Mirror position memory ....................151
Side turn signal lights .......................... 203
Replacing light bulbs ......................... 461
Turn signal lever................................. 203
Slip indicator............................................477
Smart entry & start system ................ 130
Antenna location .................................130
Entry functions ............................. 118, 125
Starting the engine.............................. 192
SMS (Short message service)......... 353
Snow mode .............................................. 198
Snow tires ................................................ 290
Spare tire ................................................. 496
Inflation pressure ............................... 546
Storage location................................. 497
Spark plug ............................................... 543
Specifications ......................................... 538
Speech command system ................ 373