tires LEXUS LS500 2021 Workshop Manual

4678-1. Specifications
8
Vehicle specifications
Tire size (P.468)
Run-flat tire (RFT) ( P.438)
This vehicle is equipped with run-flat tires (RFT). A or mark is molded on the
sidewall of the run-flat tire.
DOT and Tire Identification Number (TIN) ( P.468)
Location of treadwear indicators ( P.393)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a
tube inside the tire and the tube maintains the air pressure.
Load limit at maximum cold tire inflation pressure ( P.393)
Maximum cold tire inflation pressure ( P.462)
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires ( P.393)
Tire information
Typical tire symbols
A
B
C
D
E
F
G
H
I
J
K

4698-1. Specifications
8
Vehicle specifications
letter)
■Tire dimensionsSection width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective 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
information.
■DOT quality grades
All passenger vehicle tires must con-
form to Federal Safety Requirements 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 condi-
tions 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 variatio ns in driving habits,
service practices and differences in road
characteristics and climate.
Tire section names
A
B
C
A
B
C
D
E
F
G
H
I
J
K
Uniform Tire Quality Grading

4708-1. Specifications
■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 con-
trolled conditions on specified govern-
ment 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) traction.
■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 condi-
tions 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 sudd
en tire failure.
Grade C corresponds to a level of perfor-
mance which all passenger car tires must
meet under the Fede ral 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 of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire 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
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)

4908-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the battery being reconnected, or maintenance being performed on
the vehicle:
List of items to initialize
ItemWhen to initializeReference
PKSB (Parking Support
Brake)
*• After reconnecting or changing the batteryP.288
Intuitive parking assist*• After reconnecting or changing the batteryP.275
Message indicating
maintenance is
required
• After maintenance is performedP.374
Oil maintenance• After maintenance is performedP.387
Tire pressure warning
system
• When the tire inflation pressure is changed, such as when changing trav-
eling speed or load weight.
• When the tire inflation pressure is changed, such as when the tire size is
changed.
• When rotating the tires.
• After performing the transmitter ID code registration procedure.
P.399
Lexus parking assist
monitor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.
Panoramic view moni-
tor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.

515Alphabetical Index
Power trunk opener and closer ............. 108
Power windowsDoor lock linked window operation..154
Jam protection function............................153
Operation........................................................153
Window lock switch ................................. 155
Pre-Collision System (PCS) Function ................................................ 215, 227
PCS OFF switch ........................................ 230
Warning light ............................................... 432
R
Radar cruise control (dynamic radar cruise control with full-speed range)... 251, 254
Radiator ........................................................... 389
RCD (Rear camera detection) ................ 271 Function ............................................................281
Warning message..................................... 282
RCTA Function ...........................................................277
Warning message..................................... 278
RCTA (Rear Cross Traffic Alert) ........... 271
Rear automatic air conditioning system .......................................................................... 333
Rear Cross Traffic Alert (RCTA) ..........277
Rear door sunshades ................................. 356
Rear Multi Operation Panel .................... 318
Rear seat position memory ....................... 137
Rear seats .........................................................128 Adjustment......................................................128
Head restraints ............................................ 138
Rear seat position memory .................... 137
Relaxation system......................................... 131
Seat heaters .................................................. 336
Seat ventilators............................................ 336
Rear side marker lights Light switch .................................................... 190
Replacing light bulbs..................................416
Rear sunshades ............................................358
Rear turn signal lights Replacing light bulbs..................................416
Turn signal lever .......................................... 185 Rear view mirror
Digital Rearview Mirror ............................143
Inside rear view mirror ..............................142
Outside rear view mirrors........................ 151
Rear window defogger ............................. 324
Refueling Capacity ......................................................... 457
Fuel types ....................................................... 457
If the fuel filler do or cannot be opened
............................................................................441
Opening the fuel tank cap ................... 200
Remote Touch ................................................314
Replacing Electronic key battery ............................... 410
Fuses...................................................................412
Light bulbs ...................................................... 416
Tires ..................................................................402
Resetting the message indicating mainte- nance is required ...................................... 374
Rev indicator .................................................... 80
Rev peak............................................................. 80
Road Sign Assist ............................................251
RSA (Road Sign Assist) ..............................251
Run-flat tires....................................... 395, 438
S
Seat belt buckle lights ................................ 340
Seat belt reminder light................... 430, 431
Seat belts............................................................ 24 Active Assist .................................................... 28
Automatic Locking Retractor................. 26
Child restraint system installation ......... 46
Cleaning and maintaining the seat belt............................................................................371
Easy Access Buckle .................................... 26
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt ............................................................................. 25
Pregnant women, proper seat belt use ............................................................................. 24
Reminder light and buzzer ........ 430, 431

516Alphabetical Index
Seat belt extender ........................................ 25
Seat belt pretensioners ...............................27
SRS warning light ...................................... 428
Seat heaters ................................................... 336
Seat position memory........................ 133, 137
Seat ventilators ............................................. 336
Seating capacity............................................. 172
Seats Adjustment............................................. 121, 128
Adjustment precautions .............................121
Child seats/child restraint system installa-tion .................................................................... 45
Cleaning........................................................... 371
Driving position memory.........................133
Front seat refresh system......................... 126
Head restraints ............................................ 138
Power easy access system .....................133
Properly sitting in the seat .........................23
Rear seat relaxation system..................... 131
Seat heaters .................................................. 336
Seat position memory .....................133, 137
Seat ventilators............................................ 336
Secondary Collision Brake ..................... 305
Sensor Automatic headlight system.................... 191
Automatic High Beam system..............193
Digital Rearview Mirror............................146
Inside rear view mirror.............................. 142
Intuitive parking assist...............................272
LTA (Lane Tracing Assist).................... 238
Parking Support Brake function (rear-crossing vehicles)...................... 293
Parking Support Brake function (static objects)........................................................289
Radar sensor........................202, 209, 267
Rain-sensing windshield wipers........... 197
Service reminder message ..................... 374
Shift lever Automatic transmission ............................178
Shift lever light ............... ............................... 340
Shopping bag hooks .................................. 349
Side airbags ...................................................... 29 Side marker lights
Light switch .................................................... 190
Replacing light bulbs ................................. 416
Side mirrors Adjustment ....................................................... 151
BSM (Blind Spot Monitor).................... 264
Folding.............................................................. 152
Linked mirror functi on when reversing
............................................................................. 151
Mirror position memory .......................... 133
RCTA function ............................................ 277
Side turn signal lights Replacing light bulbs ................................. 416
Turn signal lever .......................................... 185
Side windows ..................................................153
Smart access system with push-button startAntenna location ........................................... 113
Entry functions .............................................. 102
Starting the engine ......................................174
Snow mode ......................................................182
Snow tires ....................................................... 309
Spark plug ...................................................... 459
Specifications ................................................ 456
Speedometer ........................................... 75, 78
Steering lock Column lock release ..................................174
Steering lock system warning message............................................................................174
Steering wheel Adjustment ....................................................... 141
Heated steering wheel ............................336
Meter control switches ..............................83
Power easy access system .................... 133
Steering wheel position memory........ 133
Stop lights Replacing light bulbs ................................. 416
Storage features .......................................... 344
Stuck If the vehicle becomes stuck ................452
Suggestion function....................................... 88
Sun visors ........................................................ 356

518Alphabetical Index
Initializing .......................................................399
Installing tire pressure warning valves and transmitters ......................................398
Registering ID codes .............................. 400
Warning light .................................................431
Tires Chains .............................................................. 310
Checking ....................................................... 393
If you have a flat tire ..................................438
Inflation pressure........................................406
Information .................................................... 467
Replacing ....................................................... 402
Rotating tires ................................................ 394
Run-flat tires .................................... 395, 438
Size.................................................................... 462
Snow tires ......................................................309
Tire inflation pressu re display function
.........................................................................395
Tire pressure warning system .............395
Warning light .................................................431
Top tether strap............................................... 55
Total load capacity ...................................... 456
Towing Dinghy towing ............................................... 173
Emergency towing ..................................... 421
Towing eyelet .............................................. 423
Trailer towing ................................................. 173
TRAC (Traction Control) ........................ 304
Traction Control (TRAC) ........................ 304
Trailer towing .................................................. 173
Transmission Automatic transmission ............................178
Driving mode select switch .................. 299
M mode ........................................................... 183
Paddle shift switches ....................... 182, 183
Snow mode ....................................................182
Trip meters ..................................................76, 81
Trunk .................................................................. 106 Hands Free Power Trunk Lid .............. 109
Internal trunk release lever ........................ 111
Power trunk opener and closer .......... 108 Smart access system with push-button
start ................................................................. 109
Trunk closer switch ...................................... 110
Trunk easy closer............................................ 111
Trunk features ..............................................349
Trunk grip ......................................................... 110
Trunk lid light................................................... 110
Trunk light ......................................................... 110
Trunk opener main switch........................ 112
Trunk opener switch ................................. 108
Wireless remote control ......................... 109
Trunk lid light .................................................... 110
Trunk light .......................................................... 110
Turn signal lights Replacing light bulbs ................................. 416
Turn signal lever .......................................... 185
U
USB charging ports.................................... 352
V
Vanity lights.................................................... 356
Vanity mirrors ............................................... 356
Variable Gear Ratio Steering (VGRS)304
VDIM (Vehicle Dynamics Integrated Man-agement)......................................................305
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM)..............................................305
Vehicle identification number ................ 456
Vehicle Stability Control (VSC) ........... 304
Ventilators (seat ventilators)................... 336
VGRS (Variable Gear Ratio Steering)304
VSC (Vehicle Stability Control) ........... 304
W
Warning buzzers ABS ................................................................... 429
Airbags............................................................428
Approach warning................................... 260