tire pressure Lexus GS350 2015 TIPS FOR THE NAVIGATION SYSTEM / LEXUS 2015 GS350 FROM MAR. 2015 PROD. (OM30F69U) Service Manual

542
GS350_OM_OM30F69U_(U)
8-1. Specifications
Ty p e D
Compact spare tire
Ti r e s i z e235/40R19 96Y XL, 265/ 35R19 94Y,
235/40R19 96V XL
Tire inflation pressure
(Recommended cold tire
inflation pressure)Front tire35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear tire 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Wheel size19  8J (235/40R19), 19  9J (265/35R19)
Wheel nut torque76 f t•lbf (103 N•m, 10.5 kgf•m)
Ti r e s i z eT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold tire
inflation pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size17  4T (T155/70D17), 18  4T (T145/70D18)
Wheel nut torque76 f t•lbf (103 N•m, 10.5 kgf•m)

548
GS350_OM_OM30F69U_(U)
8-1. Specifications
Tire size ( P. 550)
DOT and Tire Identification Number (TIN) ( P. 549)
Location of treadwear indicators ( P. 4 0 8 )
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 4 )
Maximum cold tire inflation pressure ( P. 5 5 4 )
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. 413)
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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554
GS350_OM_OM30F69U_(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

556
GS350_OM_OM30F69U_(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_OM30F69U_(U)
5578-1. 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

570
GS350_OM_OM30F69U_(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 2
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 1

598Alphabetical index
GS350_OM_OM30F69U_(U)
Emergency, in case ofIf a warning buzzer sounds................................................. 468
If a warning light turns on.............. 468
If a warning message is displayed ........................................478
If the electronic key does not operate properly ....... 520
If the engine will not start................. 515
If the parking brake cannot be released ......................... 518
If the shift lever cannot be shifted from P ............. 517
If the vehicle battery is discharged .........................................523
If you have a flat tire ......................... 502
If you think something is wrong.............................................. 466
If your vehicle becomes stuck ..................................................... 530
If your vehicle has to be stopped in an emergency ......... 459
If your vehicle needs to be towed ...................................... 460
If your vehicle overheats ................ 527
Emergency flashers ............................. 458
Engine Accessory mode................................. 178
Compartment..................................... 395
Engine switch ......................................... 177
Hood ........................................................392
How to start the engine .................... 177
Identification number ...................... 535
If the engine will not start................. 515
Ignition switch (engine switch) .................................. 177
Overheating ......................................... 527 Engine compartment cover............. 396
Engine coolant ...................................... 400
Capacity.................................................538
Checking .............................................. 400
Preparing and checking before winter .................................... 283
Engine coolant temperature gauge .......................................................... 81
Engine immobilizer system ..................70
Engine oil ..................................................397 Capacity.................................................536
Checking ............................................... 397
Oil level warning message ........... 487
Oil pressure warning message........................... 479
Preparing and checking before winter .................................... 283
Engine oil maintenance data ........... 382
Engine switch ........................................... 177
Enhanced VSC ..................................... 248
EPS (Electric Power Steering) ..............249 Function .................................................. 249
Warning light ....................................... 469
Warning message.............................483
Event data recorder (EDR)................... 10

600Alphabetical index
GS350_OM_OM30F69U_(U)
Hands-free system (for cellular phone)
*
HD Radio® system*
Head restraints ........................................ 142
Headlights .................................................196 Adaptive Front-lighting System (AFS) .................................... 198
Discharge headlights precautions ....................................... 455
Headlight leveling warning message ...........................482
Light switch ............................................ 196
Replacing light bulbs ........................453
Wattage ..................................................543
Headlights aim ........................... 440, 584
Head-up display....................................... 92
Heaters Air conditioning system ..................299
Heated steering wheel ....................345
Seat heaters .......................................... 347
Outside rear view mirrors ............. 324
Hill-start assist control ........................ 256
Horn ............................................................ 195
Hood .......................................................... 392 Open ........................................................392
Warning message ............................ 485
Hooks Cargo hooks ........................................ 337
Coat hooks .......................................... 356
Retaining hooks (floor mat) ............. 26
Luggage hook ..................................... 337
Utility hook ........................................... 358 I/M test ..................................................... 388
Identification........................................... 535
Engine .....................................................535
Vehicle ....................................................535
Ignition switch (engine switch) ......... 177
Illuminated entry system ................... 329
Immobilizer system .................................70
Indicators ..................................................... 79
Initialization Maintenance ..................................... 382
Moon roof ............................................... 157
Power windows.................................... 152
Tire pressure warning system .................................410
Initiators (tire pressure warning system) .................................. 416
Inside door handle lights .................... 327
Inside rear view mirror......................... 146
Instrument panel light control ............ 82
Interior lights ........................................... 327
Intuitive parking assist
*
Function*
Warning message..................481, 488
Jack Positioning a floor jack.................... 393
Vehicle-equipped jack ...................503
Jack handle .................................................503
Jam protection function Moon roof ...............................................156
Power trunk opener and closer ............................................ 129
Power windows.................................... 152
HI
J

605Alphabetical index
GS350_OM_OM30F69U_(U)
Seats.............................................................134Adjustment ............................................. 134
Adjustment precautions .................. 135
Child seats/child restraint system installation..............................59
Cleaning .................................................378
Driving position memory ................ 136
Head restraints ......................................142
Power easy access system ............ 136
Properly sitting in the seat ................ 28
Seat heaters .......................................... 347
Seat position memory....................... 136
Seat ventilators .................................... 347
Sensor Automatic headlight system .......... 199
Humidity sensor .................................. 315
Inside rear view mirror ......................147
Intuitive parking assist
*
Lexus night view .................................. 281
LKA (Lane-Keeping Assist) ......... 233
Radar sensor ................227, 260, 270
Rain-sensing windshield wipers ...................................................207
Service reminder indicators ................76
S-FLOW mode .......................................313
Shift lever .................................................. 184 Automatic transmission ................... 184
If the shift lever cannot be shifted from P ............. 517
Shift lever light ....................................... 327
Shift lock system......................................517
Side airbags ............................................... 37
Side display ............................................. 296 Side marker lights .................................. 196
Light switch.............................................196
Replacing light bulbs ....................... 453
Welcome light illumination control....................................................107
Side mirrors .............................................. 148 Adjusting and folding ........................148
Blind Spot Monitor ........................... 267
Linked mirror function when reversing..................................149
Mirror position memory ..................136
Side turn signal lights ............................190 Replacing light bulbs ....................... 453
Turn signal lever .................................. 190
Smart access system with push-button start ....................... 107 Antenna location................................. 109
Entry functions ......................................107
Starting the engine .............................. 177
Warning message............................. 484
Snow tires .................................................287
Spare tire ................................................. 502 Inflation pressure................................ 542
Storage location .................................503
Spark plug ............................................... 538
Specifications......................................... 534
Speedometer .............................................. 81
Steering lock ........................................... 180 Column lock release .......................... 181
Steering lock system warning message.......................... 500
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

606Alphabetical index
GS350_OM_OM30F69U_(U)
Steering wheel .........................................145Adjustment ............................................. 145
Audio switches
*
Heated steering wheel ....................345
Power easy access system ............ 136
Steering wheel position memory.............................. 136
Stop lights Replacing light bulbs ........................453
Storage feature ..................................... 330
Stuck If the vehicle becomes stuck ....... 530
Sun visors ................................................. 340
Sun shade Rear...........................................................352
Rear door.............................................. 353
Roof............................................................ 156
Switches AFS OFF switch .................................. 198
Audio remote control switches
*
BSM (Blind spot monitor) switch.................................................... 267
Cruise control switch.........................214
“DISP” button ......................................... 85
Door lock switches .............................123
Driving mode select switch .......... 243
Driving position memory switches .................................................137
Dynamic radar cruise control switch .................................... 218
Emergency flashers switch .......... 458
Engine switch ......................................... 177
Fog light switch .................................... 201
Garage door opener switches .............................................. 359
Heated steering wheel switch....................................................345 HUD (Head-up display)
switches ................................................. 92
Ignition switch........................................ 177
Intuitive parking assist
*
Lexus night view switch...................277
Light switches ........................................196
LKA (Lane-Keeping Assist) switch ................................................... 235
Moon roof switches .......................... 155
Outside rear view mirror switches ................................................148
Paddle shift switches......................... 186
PCS OFF switch ................................ 260
Power door lock switch ................... 123
Power window switches ................... 151
Rear sunshade switch ..................... 352
Rear window and outside rear view mirror defoggers
switch ................................................... 324
Seat heater switches ........................ 347
Seat ventilator switches .................. 347
Snow mode switch ............................ 185
“SOS” button ....................................... 366
Talk switch
*
Telephone switches*
Tilt and telescopic steering control switch ..................145
Tire pressure warning reset switch .......................................................411
Trunk closer switch.............................128
Trunk opener switch .......................... 127
Trunk opener main switch ..............128
Vehicle-to-vehicle distance button ..................................................... 221
VSC OFF switch ...............................250
Window lock switch ........................... 151