2010 Lexus GS450h run flat

5
When trouble arises
567
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 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 hybrid system 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
Observe the following precautions to reduce the risk of death or serious injury.
●Never use oil or grease on the wheel bolts or wheel nuts. Oil and grease may
cause the wheel nuts to be excessively tightened, leading to bolt or disc wheel
damage. In addition, the oil or grease can cause the wheel nuts to loosen and the
wheel may fall off, causing a serious accident. Remove any oil or grease from the
wheel bolts or wheel nuts.
●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.

570
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 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 information on run-flat tires
See the tire warranty book.
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 )

602
6-1. Specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
Tire size (P. 6 0 4 )
DOT and Tire Identification Number (TIN) (P. 603)
Location of treadwear indicators (P. 4 7 5 )
Run-flat tire (RFT) or standard tire (P. 570)
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 tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure (P. 6 0 8 )
Maximum cold tire inflation pressure (P. 6 0 8 )
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. 480)
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.

604
6-1. Specifications
GS_HV_U (OM30C81U)
February 1, 2010 11:10 am
Tire size
■Typical tire size 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

632
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Daytime running light system ............172
Defogger
Rear window ........................................268
Side mirror ............................................268
Dimension ............................................... 588
Dinghy towing ........................................239
Display
Energy flow.............................................. 29
Multi-information display................ 168
Touch screen ....................................... 242
Trip information ....................................169
Warning message............................. 543
Do-it-yourself maintenance .............454
Door courtesy lights ............................395
Door pocket........................................... 405
Doors
Door lock.................................. 41, 53, 55
Rear door child protector ................ 56
Driver’s seat belt reminder light .....536
Driver’s seat position memory ........... 67
Driving
Correct posture .................................. 105
Procedures ............................................ 140
DVD player/changer..........................293
Electric power steering ....................... 214
Electronic key
If the electronic key does 
not operate properly .................... 575
Replacing battery .............................. 494Emergency, in case of
If a warning light turns on .............. 534
If a warning message is 
displayed ............................................ 543
If the electronic key does 
not operate properly ................... 575
If the hybrid system 
will not start ........................................572
If the shift lever cannot be 
shifted from “P” ................................573
If the 12 volt battery is 
discharged ....................................... 578
If you have a flat tire ........... 560, 570
If you lose your keys .........................574
If you think something is 
wrong .................................................... 531
If your vehicle becomes stuck .... 584
If your vehicle has to be stopped 
in an emergency ............................586
If your vehicle needs to be 
towed ................................................... 523
If your vehicle overheats..................581
Energy monitor ........................................ 29
Engine
ACCESSORY mode......................... 151
Compartment ..................................... 460
Hood ........................................................457
How to start the 
hybrid system.....................................150
If the hybrid system 
will not start ........................................572
Overheating ..........................................581
Power (ignition) switch ....................150D
E

637
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Switch
Fog light switch..................................... 174
Ignition switch....................................... 150
Light switches.......................................... 171
Mode select switch ............................155
Power door lock switch .................... 55
“POWER” switch ............................... 150
Power window switch........................ 87
Tire pressure warning 
reset switch ....................................... 476
Tire pressure 
warning select switch................... 478
Window lock switch ........................... 87
Wipers and washer switch............. 175
Tail lights
Switch .......................................................... 171
Theft deterrent system
Alarm .......................................................... 101
Immobilizer system ............................. 99
Theft prevention labels ........................104
Tire inflation pressure......................... 596
Tire information
Glossary ............................................... 608
Size ........................................................... 604
Tire identification number ............. 603
Uniform Tire Quality Grading ...606Tires
Chains ..................................................... 234
Checking ...............................................475
Compact spare tire ........................... 561
If you have a flat tire .............560, 570
Inflation pressure ............................... 596
Information ............................................. 601
Replacing .............................................. 560
Rotating tires ........................................ 475
Size ........................................................... 596
Snow tires ..............................................236
Tire pressure warning system .....475
Tools ...........................................................560
Total load capacity ............................... 232
Touch screen .......................................... 242
Towing
Dinghy towing .....................................239
Emergency towing............................524
Trailer towing .......................................238
Traction control ...................................... 214
Transmission
If the shift lever cannot be 
shifted from “P” ................................573
Mode select switch ............................ 155
“S” mode.................................................. 156
Transmission.......................................... 154
Trip meter ................................................... 161
Trunk
Opener ......................................................60
Trunk light ...................................................61
Wattage ..................................................597
Turn signal lights
Replacing light bulbs ......................... 514
Switch........................................................ 158
Wattage ..................................................597
T

640
GS_HV_U (OM30C81U)
February 1, 2010 11:14 am
What to do if...
What to do if...
A tire puncturesP. 5 6 0 /
570If you have a flat tire
The hybrid system does not start
P. 9 9Immobilizer system
P. 5 7 2If the hybrid system will not start
P. 5 7 8If the 12 volt battery is discharged
The shift lever cannot be 
moved outP. 5 7 3If 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 8 1If your vehicle overheats
The key is lostP. 5 74If you lose your keys
The 12 volt battery runs outP. 5 7 8If the 12 volt battery is discharged
The doors cannot be lockedP. 5 5Doors
The horn begins to soundP. 1 0 1Alarm
The vehicle is stuck in mud or
sandP. 5 8 4If the vehicle becomes stuck

644
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
GAS STATION INFORMATION
Auxiliary catch lever
P. 4 5 7
Trunk opener
P. 6 0
Fuel filler door
P. 9 4
Hood lock release lever
P. 4 5 7Fuel filler door opener
P. 9 4Tire inflation pressure
P. 5 9 6
Fuel tank capacity17.2 gal. (65 L, 14.3 Imp.gal.)
Fuel typePremium unleaded gasoline onlyP. 9 6 , 5 9 0
Cold tire inflation 
pressure
Driving under normal conditions
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Driving at high speeds above 100 mph 
(160 km/h) (in countries where such speeds 
are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the
front tires and rear tires. Never exceed the 
maximum cold tire inflation pressure indicated
on the tire sidewall.P. 5 9 6
Engine oil capacity
(Drain and refill)qt. (L, Imp.qt.)
With filter 6.6 (6.3, 5.5)
Without filter 6.2 (5.9
, 5.2)
Engine oil type“Toyota Genuine Motor Oil” or equivalent
Oil grade: ILSAC multigrade engine oilP. 5 9 1