2010 Lexus IS250 warning

5
When trouble arises
497
5-2. Steps to take in an emergency
■The compact spare tire
●The 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.
●Make sure to check the tire pressure of the compact spare tire. (P. 5 2 9 )
■When 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 indicated. Also, if you
replace the compact spare tire after the tire pressure warning light comes on, the
light remains on.
■If 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.
■After completing the tire change
The tire pressure warning system must be reset. (P. 4 1 6 )
STEP1
STEP2
STEP3

500
5-2. Steps to take in an emergency
NOTICE
■Do not drive the vehicle with a flat tire.
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
■Be careful when driving over bumps with the compact spare tire installed on the
vehicle.
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road sur-
faces.
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.
■To avoid damaging the tire pressure warning valves and transmitters
Do not use liquid sealants on flat tires.

542
6-1. Specifications
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found where
applicable on the tire sidewall between tread shoulder and maximum
section width.
For example: Treadwear 200 Traction AA Temperature A
■Treadwear
The treadwear grade is a comparative rating based on the wear rate of
the tire when tested under controlled conditions on a specified gov-
ernment 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, however, and may depart significantly from the norm due to varia-
tions in driving habits, service practices and differences in road characteris-
tics and climate.
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and
they represent the tire's ability to stop on wet pavement as measured
under controlled conditions on specified government test 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) trac-
tion.

543
6-1. Specifications
6
Vehicle specifications
■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. 109.
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

556
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Engine oil maintenance
dataAfter changing engine oilP. 4 0 3
Tire pressure warning
system
• When rotating the tires with differing
front and rear tire inflation pressures.
• When changing the tire inflation
pressure by changing traveling
speed.
• When changing the tire size.
P. 4 1 5
The following items must be initialized for normal system operation in cases
such as after the battery is reconnected, or maintenance is performed on
the vehicle.

562
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
ABSAnti-lock Brake System
AFSAdaptive Front-lighting System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
AW DAll Wheel Drive
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

564
Alphabetical index
Alphabetical index
A/C ............................................................220
ABS.............................................................. 196
AFS .............................................................. 166
Adaptive front lighting system ......... 166
Air conditioning filter ........................... 431
Air conditioning system
Air conditioning filter ......................... 431
Automatic air conditioning
system .................................................. 220
Airbags
Airbag operating conditions........... 96
Airbag precautions for your
child.......................................................... 99
Airbag warning light .........................472
Curtain shield airbag operating
conditions.............................................. 96
Curtain shield airbag
precautions .......................................... 99
Front passenger occupant
classification system....................... 104
General airbag precautions ........... 99
Locations of airbags............................ 93
Modification and disposal of
airbags .................................................. 103
Proper driving posture ............... 91, 99
Side airbag operating
conditions.............................................. 96
Side airbag precautions .................... 99
SRS airbags ............................................. 93
Alarm ........................................................... 88
Antenna ....................................................238
Anti-lock brake system ....................... 196
Armrest .....................................................354
Ashtrays ....................................................345
Audio input .............................................. 275Audio system
Antenna.................................................. 238
AUX adapter .......................................275
Bluetooth
® audio ............................. 280
CD player/changer ........................... 241
iPod
®...................................................... 256
MP3/WMA disc............................... 248
Optimal use .......................................... 273
Portable music player ......................275
Radio ........................................................233
Steering wheel audio switch......... 277
USB memory .......................................264
Automatic air conditioning
system .................................................... 220
Automatic headlight leveling
system ...................................................... 167
Automatic light control system.........165
Automatic transmission
Automatic transmission ................... 139
If the shift lever cannot be
shifted from P................................... 503
S mode ..................................................... 142
AUX adapter ......................................... 275
Back-up lights
Wattage ................................................. 534
Battery
Checking................................................. 410
If the vehicle has a discharged
battery ................................................. 509
Preparing and checking
before winter...................................... 210
Bottle holders......................................... 338
Bluetooth
® audio .................................280
Bluetooth® phone ............................... 298
A
B

566
Alphabetical index
Cruise control
Cruise control ....................................... 175
Dynamic radar cruise control ....... 179
Cup holder ..............................................336
Curtain shield airbags............................ 93
Customizable features ...................... 550
Daytime running light system ........... 166
Defogger
Rear window ........................................ 228
Side mirror ............................................ 228
Dimension ................................................520
Dinghy towing ............................... 215, 216
Display
Dynamic radar cruise control ....... 179
Satellite switch mode ....................... 342
Trip information ..................................... 161
Warning message............................ 480
Do-it-yourself maintenance .............394
Door courtesy lights
Door courtesy lights......................... 329
Wattage.................................................. 534
Door pockets......................................... 338
Doors
Door lock................................ 28, 40, 43
Door windows ....................................... 76
Side mirrors ..............................................73
Driver's seat belt reminder light ..... 473
Driving
Correct posture ...................................... 91
Procedures ............................................. 124
Driving position memory ...................... 53Electric power steering........................196
Electronic key
If the electronic key does not
operate properly............................505
Emergency, in case of
If the engine will not start .................501
If the shift lever cannot be
shifted from P................................... 503
If the vehicle has a discharged
battery ................................................. 509
If the warning buzzer sounds........ 471
If the warning light turns on............ 471
If a warning message is
displayed ............................................ 480
If you have a flat tire .........................492
If you lose your keys ........................ 504
If you think something is
wrong ...................................................467
If the electronic key does not
operate properly............................505
If your vehicle becomes stuck ...... 515
If your vehicle has to be
stopped in an emergency ........... 517
If your vehicle needs to be
towed ..................................................... 461
If your vehicle overheats.................. 512
Emergency flashers
Switch ...................................................... 460
Engine
Compartment ..................................... 400
Engine switch ........................................ 134
Hood ........................................................397
How to start the engine ................... 134
Identification number ........................ 521
If the engine will not start .................501
Ignition switch ....................................... 134
Overheating .......................................... 512
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