2011 Lexus GS350 run flat

5
When trouble arises
541
5-2. Steps to take in an emergency
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
CAUTION
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Vehicles with standard tires:
• Stop your vehicle in a safe place as soon as possible. Adjust the tire inflationpressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check the tires. If the tire is
flat, change to the spare tire and have the flat tire repaired by the nearest
Lexus dealer.
• Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
●Vehicles with run-flat tires:
• Decelerate to the lowest appropriate speed as soon as possible. Do not driveover 55 mph (90 km/h).
• Check and adjust the tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure
adjustment, it is probable that you have a flat tire. Have the tire replaced by
the nearest Lexus dealer.
• Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

564
5-2. Steps to take in an emergency
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or serious injuries due to the vehicle
suddenly falling off the jack.
●Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires
on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not raise the vehicle while someone is in it.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●Do not put any part of your body under the vehicle supported by a jack.
●Do not start or run the engine while your vehicle is supported by the jack.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.
■Replacing a flat tire
Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m, 10.5
kgf•m) as soon as possible after changing wheels.
Failure to follow these precautions could cause the nuts to loosen and the wheels
may fall off, which could lead to an accident causing death or serious injury.
■When installing the wheel nuts
Be sure to install the wheel nuts with the tapered end facing inward.( →P. 4 7 8 )

5
When trouble arises
567
5-2. Steps to take in an emergency
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
If you have a flat tire (Vehicles with run-flat tires)
■In some condition (such as at high temperatures)
You can not continue driving for up to 100 miles (160 km).
■Spare tire
A spare tire is not provided on the vehicle with run-flat tires.
■If you cannot distinguish between standard tires and run-flat tires
Consult your Lexus dealer.
■For detailed informatio n on run-flat tires
See the tire warranty book.
NOTICE
■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 pressu re warning valves and transmitters
Do not use liquid sealants on flat tires.
Take your vehicle to the nearest Lexus dealer or authorized tire dealer as
soon as possible.
■ Run-flat tires (A “RFT” or “DSST” mark is molded on the sidewall)
You can continue driving the
vehicle with run-flat tires even if
any tire goes flat.
The vehicle is able to run for a
maximum of 100 miles (160 km)
at a speed below 55 mph (90
km/h) after the tire pressure
warning light comes on.
(→ P. 5 3 7 )

603
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
Tire size(→ P. 605)
DOT and Tire Identification Number (TIN) (→ P. 6 0 4 )
Location of treadwear indicators (→ P. 463)
Run-flat tire (RFT) or standard tire (→ P. 567)
This vehicle can be equipped with either run-flat tires (RFT) or standard
tires. A “RFT” or “DSST” mark is molded on the sidewall of the run-flat tire.
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 filled in the tire. A
tube type tire has a tube inside the ti re and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure ( →P. 609)
Maximum cold tire inflation pressure ( →P. 609)
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 tire or all season tire (→ P. 4 6 8 )
An all season tire has “M+S” on the sidewall. 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 into its sidewall. This tire is designed for temporary emer-
gency use only.

605
6-1. Specifications
6
Vehicle specifications
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
Tire size■ Typical tire si ze information
Ty p e A
The illustration indicates typical
tire size.
Ti r e u s e
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 or 3 digits)
Speed symbol
(alphabet with one letter)
Speed category
(alphabet with one letter)
Run-flat tire code
Ty p e B
Ty p e C

640
Alphabetical index
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
Daytime running light system ........... 156
DefoggerRear window........................................255
Side mirror ............................................255
Dimension ............................................... 584
Dinghy towing ........................................ 224
Display Multi-information display................. 152
Touch screen ....................................... 228
Trip information ....................................153
Warning message............................. 544
Do-it-yourself maintenance ............. 442
Door courtesy lights ............................382
Door pocket............................................392
Doors Door lock...................................29, 41, 43
Rear door child protector ................ 44
Driver’s seat belt reminder light .....536
Driver’s seat position memory ...........55
Driving
Correct posture .................................... 90
Procedures ............................................. 124
DVD player/changer......................... 280
Electric power steering ....................... 199
Electronic key If the electronic key does not operate properly ...................... 571
Replacing battery .............................. 482 Emergency, in case of
If a warning light turns on .............. 534
If a warning message is displayed ............................................ 544
If the electronic key does not operate properly ..................... 571
If the engine will not start .......................................................568
If the shift lever cannot be shifted from “P” ............................... 569
If the 12 volt battery is discharged ........................................574
If you have a flat tire ............ 557, 567
If you lose your keys ........................ 570
If you think something is wrong .................................................. 530
If your vehicle becomes stuck ......581
If your vehicle has to be stopped in an emergency ............................ 582
If your vehicle needs to be
towed ................................................... 520
If your vehicle overheats................ 578
Engine ACCESSORY mode....................... 134
Compartment ..................................... 448
Engine (ignition) switch.................... 133
Hood ....................................................... 445
How to start the engine ................... 133
If the engine will not start ...............568
Overheating ........................................ 578
Engine compartment cover ............. 450
Engine coolant temperature gauge .......................................................145D
E

645
Alphabetical index
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
Tire informationGlossary ................................................609
Size ...........................................................605
Tire identification number .............604
Uniform Tire Quality Grading ... 607
Tires
Chains ....................................................... 219
Checking ............................................... 463
Compact spare tire ..........................558
If you have a flat tire.............. 557, 567
Inflation pressure ............................... 596
Information............................................ 602
Replacing............................................... 557
Rotating tires........................................ 463
Size ........................................................... 596
Snow tires................................................ 221
Tire pressure warning system..... 463
Tools ...........................................................557
Total load capacity................................. 217
Touch screen ......................................... 228
Towing Dinghy towing......................................224
Emergency towing ........................... 522
Trailer towing........................................223
Traction control ...................................... 199
Trip meter.................................................. 145
Trunk Opener...................................................... 48
Trunk light .................................................49
Wattage .................................................598
Turn signal lights Replacing light bulbs ......................... 512
Switch ........................................................ 142
Wattage .................................................598 Vanity lights
Vanity lights ..........................................394
Wattage................................................. 598
Vanity mirrors ........................................394
Variable gear ratio steering ............ 200
Vehicle dynamics
integrated management ................ 200
Vehicle identification number ........ 585
Vehicle load limits ..................................217
Ventilators .............................................. 400
Warning buzzers
Brake system........................................534
Downshifting ......................................... 140
Open door .......................................... 536
Seat belt reminder ............................ 536
Warning lights Anti-lock brake system .................. 535
Brake system........................................534
Charging system................................534
Electric power steering warning light .................................... 535
Electronically controlled brake system ............ 535
Low fuel level ...................................... 536
Malfunction indicator lamp .......... 535
Master warning light.........................537
Open door ........................................... 536
Pre-collision system......................... 535
Seat belt reminder light.................. 536
SRS airbags.......................................... 535
Tire pressure warning light ........... 537V
W

648
GS_G_U (OM30C11U)
October 28, 2011 5:15 pm
What to do if...
What to do if...
A tire puncturesP. 5 5 7 /567If you have a flat tire
The engine does not start
P. 8 5Immobilizer system
P. 5 6 8If the engine will not start
P. 5 74If the 12 volt battery is discharged
The shift lever cannot be
moved outP. 5 6 9If the shift lever cannot be shifted
from “P”
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 5 7 8If your vehicle overheats
The key is lostP. 5 7 0If you lose your keys
The 12 volt battery runs outP. 5 74If the 12 volt battery is discharged
The doors cannot be lockedP. 4 3Doors
The horn begins to soundP. 8 7Alarm
The vehicle is stuck in mud or
sandP. 5 8 1If the vehicle becomes stuck