2006 Lexus GS430 engine

FOREWORD
i
Congratulations on your selection of this Lexus. In Lexus vehicles we h\
ave invested all our engineering and design resources; all
the know−
how we have gained in over 60 years of making automobiles; the highest m\
otivation of our most talented employees; and
our tradition of incessant striving toward ever greater quality.
This Owner’s Manual explains the features of your new Lexus. Please read it and follow the \
instructions carefully so that
you can enjoy many years of safe motoring.
When it comes to service, remember that your Lexus dealer knows your veh\
icle very well and is interested in your complete
satisfaction. Your Lexus dealer will provide quality maintenance and any other assistan\
ce you may require.
If there is not a Lexus dealer near you, please call the following numbe\
r:
U.S. OWNERS
If you need emergency assistance for any reason, please call the followi\
ng number:
 When traveling in the U.S. mainland or Canada :
Lexus Roadside Assistance Tollfree: 180025LEXUS or 18002553987
 HAWAII:
Servco Automotive Roadside Assistance/Customer Services Tollfree: 180025LEXUS or 18002553987
CANADIAN OWNERS
 When traveling in Canada or the U.S. mainland :
Lexus Roadside Assistance/Customer Service Tollfree: 180026LEXUS or 18002653987
Please leave this Owner’s Manual in this vehicle at the time of resale. The next owner will nee\
d this information also.
All information and specifications in this manual are current at the time o\
f printing. However, because of the Lexus policy of continual
product improvement, we reserve the right to make changes at any time wi\
thout notice.
Please note that this manual applies to all models and explains all equipment, \
including options. Therefore, you may find
some explanations for equipment not installed on your vehicle.
Please access our websites for further information.
 The U.S. mainland www.lexus.com
 Hawaii www.servcolexus.com
 Canada www.lexus.ca

IMPORTANT INFORMATION ABOUT YOUR LEXUS
iii
Event data recorder
Your vehicle has computers that monitor and control certain
aspects of your vehicle. These computers assist in driving and
maintaining optimal vehicle performance. Besides storing
data useful for troubleshooting, there is a system to record data
in a crash or a near car crash event. This is called an Event
Data Recorder (EDR).
The SRS airbag sensor assembly contains the EDR. In a
crash or a near car crash event, this device may record some
or all of the following information:
 Engine speed
 Whether the brake pedal was applied or not
 Vehicle speed
 To what extent the accelerator pedal was depressed
 Position of the transmission selector lever
 Whether the driver and front passenger wore the seat belts
or not
 Driver’s seat position
 Front passenger’s occupant classification
 SRS airbag deployment data
 SRS airbag system diagnostic data If your vehicle is equipped with a vehicle stability control (VSC)
system,
its Electronic Control Unit (ECU) may contain another
EDR. There are a variety of driving situations which include
activating the VSC under wh ich the VSC EDR will record
certain information. The VSC EDR may record some or all of
the following information:
 Behavior of the vehicle
 Steering wheel angle
 Vehicle speed
 To what extent the accelerator pedal was depressed
 To what extent the brake pedal was applied
 To what extent the ECU controlled the condition of the 4
wheels
 Vehicle stability control system diagnostic data
The information above is intended to be used for the purpose
of improving vehicle safety performance. Unlike general data
recorders, the EDR does not record sound data such as
conversation between passengers.

IMPORTANT INFORMATION ABOUT YOUR LEXUS
ivLexus will not disclose the data recorded in an EDR to a third
party except when:

An agreement from the vehicle’s owner (or the leasing
company for a leased vehicle) is obtained
 Officially requested by the police or other authorities
 Used as a defense for Lexus in a law suit
 Ordered by the court
However, if necessary Lexus will:
 Use the data for research on Lexus vehicle safety
performance
 Disclose the data to a third party for research purposes
without disclosing details of the vehicle owner, and only
when it is deemed necessary
 Disclose summarized data cleared of vehicle identification
information to a non −Lexus organization for research
purposes
New vehicle warranty
Your new vehicle is covered by the following Lexus limited
warranties:
 New vehicle warranty
 Emission control systems warranty
 Others
For further information, please refer to the “Owner’s Guide”,
“Owner’s Manual Supplement” or “Warranty Booklet”.
Your responsibility for maintenance
It is the owner’s responsibility to make sure the specified
maintenance is performed. Section 5 of this Owner’s Manual
gives details of these maintenance requirements. Included in
Section 6 is general maintenance. For scheduled
maintenance information, please refer to the “Owner’s Manual
Supplement / Scheduled Maintenance”.
Important health and safety information about
your Lexus
CAUTION
 WARNING: Engine exhaust, some of its constituents,
and a wide variety of automobile components
contain or emit chemicals known to the State of
California to cause cancer and birth defects and
other reproductive harm. In addition, oils, fuels and
fluids contained in vehicles as well as waste
produced by component wear contain or emit
chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.
 Battery posts, terminals and related accessories
contain lead and lead compounds. W ash your hands
after handling. Used engine oil contains chemicals
that have caused cancer in laboratory animals.
Always p rotect your skin by washing thoroughly with
soap and water.

IMPORTANT INFORMATION ABOUT YOUR LEXUS
vi
Leak detection pump
This pump performs fuel evaporation leakage check. This
check is done several hours after the engine is turned off. So
you may hear sound coming from underneath the luggage
compartment for several minutes. It does not indicate a
malfunction.

HOW TO USE THIS MANUAL
vii
HOW TO USE THIS MANUAL
The contents of this manual are explained briefly on this
page to help you make the best use of the manual. Please
read this page and the rest of the Owner’s Manual
carefully to make sure you fully understand the operation
of your vehicle.
This will help you enjoy safe and comfortable driving.
TABLE OF CONTENTS
The table of contents and the pictorial index provide easy
reference to the appropriate pages.
BASIC OPERATION QUICK REFERENCE
Operation of basic equipment is briefly explained in an easily
understandable way for quick reference.
SECTION 1 INSTRUMENTS AND CONTROLS
The vehicle’s equipment is divided into the 8 groups listed
below. Use of the equipment is explained, including any points
you should pay particular attention to.
1. Keys and doors
2. Switches
3. Gauges, meters and service reminder indicators
4. Interior equipment
5. Exterior equipment
6. Occupant restraint systems
7. Steering wheel and mirrors
8. Touch screen
SECTION 2 AIR CONDITIONING AND AUDIO
The features of the vehicle’s air conditioning and audio are
explained in detail. Be sure to read this section so that you can
make full use of them.
SECTION 3 STARTING AND DRIVING
Starting the engine, driving, stopping, operation of features
affecting vehicle handling, hints on vehicle safety and safe
driving techniques are all explained. Please read everything
in this section, and remember − drive safely!
SECTION 4 IN CASE OF AN EMERGENCY
This section explains what to do in the event of an urgent
situation such as the engine not starting or getting a flat tire,
etc. If such a problem occu rs, check the contents of this
Owner’s Manual and follow the instructions given.
SECTION 5 MAINTENANCE
This section explains the importance of regular maintenance.
Regular and periodic inspection and maintenance of your
Lexus will help to keep your vehicle in its best condition.
SECTION 6 SERVICE PROCEDURES AND
SPECIFICATIONS
Simple maintenance procedure and service data are provided
here for your reference should you wish to perform inspection
and maintenance yourself.

GAS STATION INFORMATION
Fuel selection:
Premium unleaded gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher required for
optimum engine performance. However, if such premium
type cannot be obtained, you may use unleaded gasoline
with an Octane Rating as low as 87 (Research Octane
Number 91).
 Fuel tank capacity:
71 L (18.7 gal., 15.6 lmp.gal.)
 Engine oil:
“Toyota Genuine Motor Oil” or equivalent
Oil grade: ILSAC multigrade engine oil.
Recommend oil viscosity − SAE 5W−30 if normal
temperatures are below 38 C (100F)
Oil capacity: L (qt., lmp.qt.)
Drain and refill with filter without filter GS430 5.1 (5.4, 4.5) 4.5 (4.8, 4.0)
GS300 (2WD) 6.3 (6.6, 5.5) 5.9 (6.2, 5.1)
GS300 (4WD) 6.4 (6.7, 5.6) 6.0 (6.3, 5.2)
See page 530 for detailed information.
 Engine coolant:
Capacity: GS430 − 10.1 L (10.7 qt., 8.9 lmp.qt.)
GS300 − 9.1 L (9.6 qt., 8.0 lmp.qt.) Coolant type −
”Toyota Super Long Life Coolant” or similar
high quality ethylene glycol based non −silicate, non −amine,
non−nitrite, and non −borate coolant with long −life hybrid
organic acid technology (Coolant with long −life hybrid
organic acid technology is a combination of low phosphates
and organic acids.)
Do not use plain water alone.
For checking the engine coolant, see page 534.
 Automatic transmission:
Fluid type − “Toyota Genuine ATF Type WS”
See page 540 or 544 for detailed information.
 Tire information:
See page 548 through 570 for detailed information.
 Tire inflation pressure:
Tire size: GS430 − 245/40R18 93Y or P245/40R18 93V
GS300 − 225/50R17 94W or P225/50R17 93V
Tire inflation pressure:
Front 230 kPa (2.3 kgf/cm
2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add the
tire inflation pressure given below to the front tires and rear
tires, but never exceed the maximum cold tire inflation
pressure molded on the tire sidewall.
GS430 60 kPa (0.6 kgf/cm
2 or bar, 9 psi)
GS300 50 kPa (0.5 kgf/cm2 or bar, 7 psi)

cm2
Maintenance procedures for the engine, chassis,
body, electrical system, and more, are clearly
explained and illustrated.
Periodic maintenance and tuneup
Periodic maintenance and tuneup helps to prevent small
problems from growing into larger ones later on. The repair
manual outlines exactly what maintenance is required and
clearly explains how to do the work yourself stepbystep.
Areas covered include such things as spark plug replacement,
valve clearance adjustment and engine oil and filter
replacement.
Where to obtain the Repair Manual
The repair manual for GS430, GS300 may be purchased from
any Lexus dealer or call the Material Distribution Center. To
purchase the repair manual, please contact your Lexus dealer
or the Material Distribution Center tollfree at
18006222033.

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
iiPage
1
Power window switches 38, 59
. . . . . . . . . . . . . . . . . . .
2 Driving position memory switches 202
. . . . . . . . . . .
3 Window lock switch 60
. . . . . . . . . . . . . . . . . . . . . . . . . .
4 Door lock switch 38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Side vents 274
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Engine switch 348
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Automatic air conditioning controls 258
. . . . . . . . . .
8 Audio system 280
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Clock 106 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
10 Center vents 273
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 Outside temperature display 109
. . . . . . . . . . . . . . . . .
12 Touch screen 219
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Navigation system display (See the separate
“Navigation System Owner’s Manual”)
13 Security indicator light 41
. . . . . . . . . . . . . . . . . . . . . . .
14 Rear window and outside rear view
mirror defogger switch 58 . . . . . . . . . . . . . . . . . . . . . . .
15 Front passenger’s seat belt reminder light 78 . . . . .
16 Emergency flasher switch 62
. . . . . . . . . . . . . . . . . . . . Page
17 Glove box
113
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 Trunk lid opener main switch 130
. . . . . . . . . . . . . . . .
19 Tire pressure warning select switch 448
. . . . . . . . . .
20 Cigarette lighter 110
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 Cupholders 118
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Seat heater switches or Seat ventilator/heater
switches 63, 65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 Traction control system off switch
(Twowheel drive models only) 425 . . . . . . . . . . . . . .
24 Driving pattern selector switch 359
. . . . . . . . . . . . . . .
25 Damping mode select switch
(GS430 only) 424 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Coin box 119
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27 Ashtray 110
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
28 Automatic transmission selector lever 359 . . . . . . .
29 Tire pressure warning reset switch 446
. . . . . . . . . . .
30 Hood lock release lever 128
. . . . . . . . . . . . . . . . . . . . .
31 Parking brake pedal 358
. . . . . . . . . . . . . . . . . . . . . . . . .
32 Switch box xi
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .