2015 Lexus GS350 tire pressure

550
GS350_OM_OM30E15U_(U)
8-1. Specifications
Tire size ( P. 5 5 2 )
DOT and Tire Identification Number (TIN) ( P. 5 5 1 )
Location of treadwear indicators ( P. 410)
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. 5 5 6 )
Maximum cold tire inflation pressure ( P. 5 5 6 )
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. 415)
An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE ONLY”
molded on its sidewall. This tire is designed for temporary emergency use only.
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556
GS350_OM_OM30E15U_(U)
8-1. Specifications
Glossary of tire terminology
Tire related termMeaning
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
Maximum inflation pres-
sureThe 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 man-
ufacturer
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)
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
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assembly
upon which the tire beads are seated

558
GS350_OM_OM30E15U_(U)
8-1. Specifications
CT
A pneumatic tire with an inverted flange tire and rim
system in which the rim is designed with 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 tire
A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire
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 from cord material in the
carcass
Intended outboard side-
wall
(a) The sidewall that contains a whitewall, bears
white lettering, or bears manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other side-
wall 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 manufacturer as primarily
intended for use on lightw eight trucks or multipur-
pose 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
inflation pressure for that tire
Maximum permissible
inflation pressureThe maximum cold inflation pressure 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
Tire related termMeaning

GS350_OM_OM30E15U_(U)
5598-1. Specifications
8
Vehicle specifications
Overall width
The linear distance between the exteriors of the side-
walls of an inflated tire, including elevations due to
labeling, decorations, or protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipur-
pose 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
Pneumatic tire
A mechanical device made of rubber, chemicals, fab-
ric and steel or other mate rials, that, when mounted
on an automotive wheel, provides the traction and
contains the gas or flui d that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that extend to
the beads are laid at substantially 90 degrees to the
centerline of the tread
Reinforced tire
A 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 side-
walls of an inflated tire, excluding elevations due to
labeling, decoration, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe parting of the rubber compound 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-Covered Surfaces,
and which is marked with an Alpine Symbol ( )
on at least one sidewall
Te s t r i mThe rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tire related termMeaning

572
GS350_OM_OM30E15U_(U)
8-3. Initialization
Items to initialize
The following items must be initialized for normal system operation
after such cases as the batter y being reconnected, or maintenance
being performed on the vehicle:
ItemWhen to initializeReference
Message indicating mainte-
nance is required• After the maintenance is per- formedP. 3 8 4
Tire pressure warning system
• When rotating the tires
• When changing the tire infla-tion pressure by changing trav-
eling speed or load weight, etc.
P. 4 1 3

600Alphabetical index
GS350_OM_OM30E15U_(U)
Emergency, in case ofIf a warning buzzer sounds..................................................470
If a warning light turns on...............470
If a warning message is displayed ....................................... 480
If the electronic key does not operate properly ........ 522
If the engine will not start................. 517
If the parking brake cannot be released ....................... 520
If the shift lever cannot be shifted from P ............. 519
If the vehicle battery is discharged ........................................ 525
If you have a flat tire ......................... 504
If you think something is wrong.............................................. 468
If your vehicle becomes stuck ......................................................532
If your vehicle has to be stopped in an emergency ........... 461
If your vehicle needs to be towed .......................................462
If your vehicle overheats ................529
Emergency flashers ............................. 460
Engine Accessory mode................................. 178
Compartment......................................397
Engine switch ......................................... 177
Hood ........................................................394
How to start the engine .................... 177
Identification number .......................537
If the engine will not start................. 517
Ignition switch (engine switch) .................................. 177
Overheating .........................................529 Engine compartment cover............. 398
Engine coolant ...................................... 402
Capacity.................................................540
Checking ............................................... 402
Preparing and checking before winter .................................... 284
Engine coolant temperature gauge .......................................................... 81
Engine immobilizer system ..................70
Engine oil ................................................. 399 Capacity.................................................538
Checking ............................................... 399
Oil level warning message ...........489
Oil pressure warning message.............................481
Preparing and checking before winter .................................... 284
Engine oil maintenance data ........... 384
Engine switch ........................................... 177
Enhanced VSC ......................................249
EPS (Electric Power Steering) ............. 250 Function ..................................................250
Warning light ......................................... 471
Warning message.............................485
Event data recorder (EDR)................... 10

602Alphabetical index
GS350_OM_OM30E15U_(U)
Hands-free system (for cellular phone)
*
HD Radio® system*
Head restraints ........................................ 142
Headlights .................................................196 Adaptive Front-lighting System (AFS) .................................... 198
Discharge headlights precautions ........................................457
Headlight leveling warning message .......................... 484
Light switch ............................................ 196
Replacing light bulbs ....................... 455
Wattage ................................................. 545
Headlights aim ........................... 442, 586
Headlights cleaner............................... 209
Head-up display....................................... 92
Heaters Air conditioning system ................... 301
Heated steering wheel .................... 347
Seat heaters ..........................................349
Outside rear view mirrors .............326
Hill-start assist control ........................ 257
Horn ............................................................ 195
Hood .......................................................... 394 Open ........................................................394
Warning message .............................487
Hooks Cargo hooks ........................................339
Coat hooks .......................................... 358
Retaining hooks (floor mat) ............. 26
Luggage hook .....................................339
Utility hook ........................................... 360 I/M test ..................................................... 390
Identification............................................537
Engine ..................................................... 537
Vehicle .................................................... 537
Ignition switch (engine switch) ......... 177
Illuminated entry system ..................... 331
Immobilizer system .................................70
Indicators ..................................................... 79
Initialization Maintenance ..................................... 384
Moon roof ............................................... 157
Power windows.................................... 152
Tire pressure warning system ................................. 412
Initiators (tire pressure warning system) .................................. 418
Inside door handle lights ................... 329
Inside rear view mirror......................... 146
Instrument panel light control ............ 82
Interior lights .......................................... 329
Intuitive parking assist
*
Function*
Warning message................ 483, 490
Jack Positioning a floor jack....................395
Vehicle-equipped jack .................. 505
Jack handle ................................................ 505
Jam protection function Moon roof ...............................................156
Power trunk opener and closer ............................................ 129
Power windows.................................... 152
HI
J

607Alphabetical index
GS350_OM_OM30E15U_(U)
Seats.............................................................134Adjustment ............................................. 134
Adjustment precautions .................. 135
Child seats/child restraint system installation..............................59
Cleaning ................................................ 380
Driving position memory ................ 136
Head restraints ......................................142
Power easy access system ............ 136
Properly sitting in the seat ................ 28
Seat heaters ..........................................349
Seat position memory....................... 136
Seat ventilators ....................................349
Sensor Automatic headlight system .......... 199
Humidity sensor ...................................317
Inside rear view mirror ......................147
Intuitive parking assist
*
Lexus night view .................................282
LKA (Lane-Keeping Assist) ......... 234
Radar sensor ................... 228, 261, 271
Rain-sensing windshield wipers ...................................................207
Service reminder indicators ................76
S-FLOW mode ...................................... 315
Shift lever .................................................. 184 Automatic transmission ................... 184
If the shift lever cannot be shifted from P ............. 519
Shift lever light ....................................... 329
Shift lock system..................................... 519
Side airbags ............................................... 37
Side display ............................................. 298 Side marker lights .................................. 196
Light switch.............................................196
Replacing light bulbs .......................455
Welcome light illumination control....................................................107
Side mirrors .............................................. 148 Adjusting and folding ........................148
Blind Spot Monitor ........................... 268
Linked mirror function when reversing..................................149
Mirror position memory ..................136
Side turn signal lights ............................190 Replacing light bulbs .......................455
Turn signal lever .................................. 190
Smart access system with push-button start ....................... 107 Antenna location................................. 109
Entry functions ......................................107
Starting the engine .............................. 177
Warning message.............................486
Snow tires ................................................ 288
Spare tire ................................................. 504 Inflation pressure................................ 544
Storage location ................................ 505
Spark plug ............................................... 540
Specifications......................................... 536
Speedometer .............................................. 81
Steering lock ........................................... 180 Column lock release .......................... 181
Steering lock system warning message...........................502
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.