inflation LEXUS UX250H 2019 Owner's Guide

4308-1. Specifications
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim by style or
code
Rim widthNominal distance between rim flanges
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb. (68 kg) times
the vehicle’s designated seating capacity
Vehicle maximum load on
the tireThe load on an individual tire that is determined by distribut-
ing to each axle its share of the maximum loaded vehicle
weight, and dividing by two
Vehicle normal load on the
tire
The load on an individual tire that is determined by distribut-
ing to each axle its share of curb weight, accessory weight,
and normal occupant weight (distributed in accordance with
Table 1
* below), and dividing by two
Weather sideThe surface area of the rim not covered by the inflated tire
BeadThe part of the tire that is ma de of steel wires, wrapped or
reinforced by ply cords and th at is shaped to fit the rim
Bead separationA breakdown of the bond between components in the bead
Bias ply tire
A pneumatic tire in which the ply cords that extend to the
beads are laid at alternate angles substantially less than 90
degrees to the centerline of the tread
CarcassThe tire structure, except tread and sidewall rubber which,
when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber compounds
CrackingAny parting within the tread, side wall, or innerliner of the tire
extending to cord material
CT
A pneumatic tire with an inverted flange tire and rim system
in which the rim is designed wi th rim flanges pointed radially
inward and the tire is designed to fit on the underside of the
rim in a manner that encloses the rim flanges inside the air
cavity of the tire
Extra load tireA tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire
Tire related termMeaning

4318-1. Specifications
8
Vehicle specifications
GrooveThe space between two adjacent tread ribs
InnerlinerThe layer(s) forming the inside surface of a tubeless tire that
contains the inflating medium within the tire
Innerliner separationThe parting of the innerliner fr om cord material in the car-
cass
Intended outboard sidewall
(a) The sidewall that contains a whitewall, bears white letter-
ing, or bears manufacturer, brand, and/or model name
molding that is higher or deep er than the same molding on
the other sidewall of the tire, or
(b) The outward facing sidewall of an asymmetrical tire that
has a particular side that must always face outward when
mounted on a vehicle
Light truck (LT) tire
A tire designated by its manuf acturer as primarily intended
for use on lightweight trucks or multipurpose passenger
vehicles
Load ratingThe maximum load that a tire is rated to carry for a given
inflation pressure
Maximum load ratingThe load rating for a tire at the maximum permissible infla-
tion pressure for that tire
Maximum permissible infla-
tion pressureThe maximum cold inflation pre ssure to which a tire may be
inflated
Measuring rimThe rim on which a tire is fitted for physical dimension
requirements
Open spliceAny parting at any junction of tread, sidewall, or innerliner
that extends to cord material
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors of the sidewalls of
an inflated tire, including elev ations due to labeling, decora-
tions, or protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipurpose
passenger vehicles, and trucks, that have a gross vehicle
weight rating (GVWR) of 10,000 lb. or less.
PlyA layer of rubber-coated parallel cords
Ply separationA parting of rubber compound between adjacent plies
Tire related termMeaning

4328-1. Specifications
*:Table 1  Occupant loading and distribution for vehicle normal load for various desig-
nated seating capacities
Pneumatic tire
A mechanical device made of rubber, chemicals, fabric and
steel or other materials, that, when mounted on an automo-
tive wheel, provides the traction and contains the gas or fluid
that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that extend to the
beads are laid at substantiall y 90 degrees to the centerline
of the tread
Reinforced tireA tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire
Section width
The linear distance between the exteriors of the sidewalls of
an inflated tire, excluding elevations due to labeling, decora-
tion, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe parting of the rubber comp ound from the cord material
in the sidewall
Snow tire
A tire that attains a traction index equal to or greater than
110, compared to the ASTM E-1136 Standard Reference
Test Tire, when using the snow traction test as described in
ASTM F-1805-00, Standard Test Method for Single Wheel
Driving Traction in a Straight Line on Snow-and Ice-Cov-
ered Surfaces, and which is ma rked with an Alpine Symbol
( ) on at least one sidewall
Test rimThe rim on which a tire is fitt ed for testing, and may be any
rim listed as appropriate for use with that tire
TreadThat portion of a tire that comes into contact with the road
Tread ribA tread section running circ umferentially around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators (TWI)The projections within the principal grooves designed to
give a visual indication of the degrees of wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Tire related termMeaning

4468-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the 12-volt battery being re connected, or maintenance being per-
formed on the vehicle.
List of the items to initialize
ItemWhen to initializeReference
PKSB (Parking Support Brake)*• After reconnecting or changing the 12-volt batteryP.247
Message indicating maintenance is
required• After the maintenance is per-formedP.328
Tire pressure warning system
• When rotating the tires
• When the tire inflation pressure is changed by changing tire size.
(When there are multiple speci-
fied pressures)
• After registering the ID codes
P.351
Oil maintenance• After the maintenance is per- formedP.339
Lexus parking assist monitor
• 12-volt battery has been rein-stalled
• The steering wheel has been moved while the 12-volt battery
was being reinstalled
• 12-volt battery power is low
Refer to the
“NAVIGA-
TION AND MULTIME- DIA SYS- TEM
OWNER’S
MANUAL”.
Power back door*• After reconnecting or changing the 12-volt battery
• After changing a fuse
P.119
Power window
• When functioning abnormally
P.145
Moon roof*P.148

472Alphabetical Index
Speedometer ........................................... 78, 82
Sport mode .................................................... 255
Steering lockColumn lock release..................................163
Steering lock system warning message...........................................................................163
Steering wheel Adjustment......................................................139
Heated steering wheel............................286
Meter control switches ..............................88
Power easy access system .....................133
Steering wheel position memory ........133
Stop lights Replacing light bulbs................................ 374
Storage feature ............................................ 293
Stuck If the vehicle becomes stuck..................413
Suggestion function....................................... 92
Sunshade.......................................................... 148
Sun visors ......................................................... 301
Switches “ODO TRIP” switch .......................... 80, 86
“SOS” button .................................................. 56
ASC (Active Sound Control) switch 176
Automatic High Beam system............. 180
Brake hold switch........................................ 175
BSM (Blind Spot Monitor) switch .... 228
Door lock switches ...................................... 110
Driving mode select switch .................. 255
Driving position memory switches .....133
Dynamic radar cruise control with full-speed range switch ................................. 217
Emergency flashers switch ................... 378
EV drive mode switch ............................. 165
Fog light switch ............................................ 183
Garage door opener switches ............. 311
Head-up display switch............................. 94
Heated steering wheel............................286
Ignition switch................................................ 162
Instrument panel light control switches .................................................................. 80, 86
Intuitive parking assist switch............... 233 Light switch ..................................................... 177
LTA (Lane-Tracing Assist) switch ..... 210
Meter control switches ............................. 88
Moon roof switches....................................147
Outside rear view mi
rror switches .....142
Paddle shift switches .......................169, 170
Parking brake switch.................................. 172
PCS OFF switch ....................................... 200
PKSB (Parking Support Brake) switch .......................................................................... 244
Power back door opener and closer switch ............................................................... 115
Power door lock switch ............................ 110
Power switch..................................................162
Power window switch .............................. 145
RCTA switch ................................................239
Rear window and outside rear view mir- ror defoggers switch ............................ 277
Rear window wiper and washer switch ........................................................................... 188
Seat heater switches.................................287
Seat ventilator switches .......................... 287
Tire pressure warning reset switch.... 351
Vehicle-to-vehicle di stance switch..... 217
VSC off switch ............................................ 257
Window lock switch.................................. 146
Windshield wiper de-icer switch....... 279
Windshield wipers and washer switch ........................................................................... 184
T
Tachometer............................................... 78, 82 Rev indicator ...................................................84
Rev peak............................................................84
Tail lights Light switch ..................................................... 177
Replacing light bulbs ................................ 374
Theft deterrent system Alarm..................................................................... 71
Immobilizer system ......................................69
Tire inflation pressure Maintenance data ...................................... 422

Alphabetical Index473
Tire inflation pressure display function
.........................................................................348
Warning light ............................................... 387
Tire information ............................................ 425 Glossary......................................................... 429
Size.................................................................... 426
Tire identification number ..................... 426
Uniform Tire Quality Grading............ 427
Tire pressure warning system Function ..........................................................348
Initializing .........................................................351
Installing tire pressure warning valves and transmitters ..................................... 350
Registering ID codes ............................... 352
Warning light ............................................... 387
Tires................................................................... 345 Chains ............................................................. 264
Checking ....................................................... 345
If you have a flat tire ..................................399
Inflation pressure..........................................361
Information .................................................... 425
Replacing .......................................................355
Rotating tires ................................................ 347
Run-flat tires ..................................... 347, 399
Size.................................................................... 422
Snow tires ...................................................... 263
Tire pressure warning system .............348
Warning light ............................................... 387
Tools.......................................................296, 355
Top tether strap............................................... 54
Total load capacity ........................................416
Towing Dinghy towing ................................................ 161
Emergency towing .................................... 381
Towing eyelet ..............................................384
Trailer towing ................................................ 160
TRAC (Traction Control) ........................ 257
Traction battery (hybrid battery) ............. 65 Hybrid battery (traction battery) air vents............................................................................ 67
Location............................................................. 65
Specification .................................................. 418 Warning message ........................................68
Traction Control (TRAC) ........................ 257
Traction motor (electric motor) ............... 62
Trailer towing ................................................. 160
Transmission Hybrid transmission....................................167
Paddle shift switches .......................169, 170
S mode ............................................................. 170
Selecting the driving mode ...................255
Trip meters ............................................... 80, 86
Turn signal lights Replacing light bulbs ................................ 374
Turn signal lever ............................................ 171
Wattage .......................................................... 422
U
USB charging ports.................................... 302
V
Vanity lights..................................................... 301Wattage .......................................................... 422
Vanity mirrors ................................................ 301
Vehicle data recording ....................................7
Vehicle identification number ..................416
Vehicle Stability Cont rol (VSC) ........... 256
Ventilators (seat ventilators)................... 286
VSC (Vehicle Stability Control) ........... 256
W
Warning buzzers ABS .................................................................. 388
Airbags........................................................... 388
Approach warning.................................... 222
Brake hold .................................................... 389
Brake Override System .......................... 391
Brake system............................................... 386
Charging system....................................... 386
Downshifting ................................................... 171
Drive-Start Control.................................... 391
Electric power steering.......................... 388

476
GAS STATION INFORMATION
Auxiliary catch lever (P.335)
Power back door switch
* (  P.115)
Fuel filler door ( P.191)
Hood lock release lever ( P.335)
Fuel filler door opener switch ( P.191)
Tire inflation pressure ( P.422)
*: If equipped
Fuel tank capacity
(Reference)10.6 gal. (40 L, 8.8 Imp.gal.)
Fuel typeUnleaded gasoline onlyP.417
Cold tire inflation
pressureP.422
Engine oil capacity
(Drain and refill  ref-
erence)
P.418
Engine oil typeP.418
A
B
C
D
E
F