Lexus GS300 1999, GS350 1999, GS400 1999, GS430 1999, GS450H 1999 Owner Manual

VEHICLE IDENTIFICATION

61G005

SECTION 6 –

SERVICE PROCEDURES AND
SPECIFICATIONS

Introduction

Vehicle identification 368. . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine compartment overview (GS400) 371. . . . . . . . . .

Engine compartment overview (GS300) 372. . . . . . . . . .

Do–it–yourself service precautions 373. . . . . . . . . . . . . .

Parts and tools 375. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

368

The vehicle identification number (VIN) is the legal
identifier for your vehicle. This number is on the left
top of the instrument panel and can be seen through
the windshield from outside.

This is the primary identification number for your Lexus.
It is used in registering the ownership of your vehicle.

61G006

The vehicle identification number (VIN) is also on the
Certification Label.

INTRODUCTION

369

INTRODUCTION

61G007a



GS400

The engine number is stamped on the engine block
as shown.



GS300

370

ENGINE COMPARTMENT OVERVIEW (GS400)

61G008a

1

Engine oil
filler cap

2

Engine oil
level
dipstick

3

Brake fluid
reservoir

4

Fuse box

5

Washer
fluid tank

6

Engine
coolant
reservoir

7

Power
steering
fluid
reservoir

8

Fuse box

9

Battery

INTRODUCTION

371

INTRODUCTION

ENGINE COMPARTMENT OVERVIEW (GS300)

61G009–2

1

Engine oil
filler cap

2

Engine oil
level
dipstick

3

Brake fluid
reservoir

4

Fuse box

5

Washer
fluid tank

6

Power
steering
fluid
reservoir

7

Engine
coolant
reservoir

8

Fuse box

9

Battery

372

DO–IT–YOURSELF SERVICE

PRECAUTIONS

If you perform maintenance yourself, be sure to
follow the correct procedure given in this Section.

You should be aware that improper or incomplete
servicing may result in operating problems.

Performing do–it–yourself maintenance during the
warranty period may affect your warranty coverage.
Read the separate Lexus Warranty statement for details
and suggestions.

This Section gives instructions only for those items that
are relatively easy for an owner to perform. As explained
in Section 5, there are still a number of items that must
be performed by a qualified technician with special tools.

For information on tools and parts for do–it–yourself
maintenance, see ”Parts and tools”.

Utmost care should be taken when working on your
vehicle to prevent accidental injury. Here are a few
precautions that you should be especially careful to
observe:

INTRODUCTION

373

INTRODUCTION

CAUTION

 When the engine is running, keep hands, clothing,

and tools away from the moving fan and engine drive
belt. (Removing rings, watches, and ties is
advisable.)

 Right after driving, the engine compartment – the

engine, radiator, exhaust manifold and power
steering fluid reservoir, etc. – will be hot. So be
careful not to touch them. Oil and other fluids may
also be hot.

 Do not smoke, cause sparks or allow open flames

around fuel or the battery. Their fumes are
flammable.

 Be extremely cautious when working on the battery.

It contains poisonous and corrosive sulfuric acid.

 Do not get under your vehicle with just the body jack

supporting it. Always use automotive jack stands or
other solid supports.

 Be sure the ignition is off if you work near the electric

cooling fan o r radiator grille. With the ignition on, the
electric cooling fan may automatically start to run if
the air conditioning is on and/or if the coolant
temperature is high.

 Use eye protection whenever you work on or under

your vehicle where you may be exposed to flying or
falling material, fluid spray, etc.

374

INTRODUCTION

NOTICE



Remember that battery and ignition cables
carry high currents or voltages. Be careful of
accidentally causing a short circuit.



Before closing the engine hood, check to see
that you have not forgotten any tools, rags, etc.



Do not drive with the air cleaner removed, or
excessive engine wear could result. Also
backfiring could cause a fire in the engine
compartment.



Do not overfill automatic transmission fluid, or
the transmission could be damaged.



Be careful not to scratch the glass surface with
the wiper frame.

PARTS AND TOOLS

Here is a list of parts and tools you will need to perform
do–it–yourself maintenance. Remember all Lexus parts
are designed in metric sizes, so your tools must be
metric.

Checking the engine oil level

Parts (if level is low):

 Use API grade SJ, ”Energy–Conserving” multigrade

engine oil or ILSAC multigrade engine oil. For
recommended oil viscosity, see page 396.

Tools:

 Rag or paper towel
 Funnel (only for adding oil)

Checking the engine coolant level

Parts (if level is low):

 “Toyota Long Life Coolant” or equivalent

See ”Checking the engine coolant level” on page 397
for instructions.

 Demineralized or distilled water

Tools:

 Funnel (only for adding coolant)

375

INTRODUCTION

Checking brake fluid

Parts (if level is low):

 FMVSS No. 116 DOT 3 or SAE J1703 brake fluid

Tools:

 Funnel (only for adding fluid)

Checking power steering fluid

Parts (if level is low):



 Automatic transmission fluid DEXRON

Tools:

 Rag or paper towel
 Funnel (only for adding fluid)

II or III

Checking battery condition

Non–maintenance batteries
Tools:

 Warm water
 Baking soda
 Grease
 Conventional wrench (for terminal clamp bolts)

Maintenance type batteries
Parts (if level is low):

 Distilled water

Tools:

 Warm water
 Baking soda
 Grease
 Conventional wrench (for terminal clamp bolts)
 Coin (for vent plugs)
 Funnel (only for adding distilled water)

Checking and replacing the blade type
fuses

Parts (if replacement is necessary):

 Fuse with same amperage rating as original

Checking the cartridge type fuses

Parts (if replacement is necessary):

 Genuine Lexus fuse or equivalent with same

amperage rating as original

376

Adding washer fluid

Parts:

 Water
 Washer fluid containing antifreeze (for winter use)

Tools:

 Funnel

INTRODUCTION

377

INTRODUCTION

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 separate
”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 separate ”Owner’s Manual
Supplement/Maintenance Schedule”.

Accessories, spare parts and
modification of your Lexus

A wide variety of non–genuine spare parts and
accessories for Lexus vehicles are currently available in
the market. You should know that Toyota does not
warrant these products and is not responsible either for
their performance, repair or replacement, or for any
damage they may cause to, or adverse effect they may

ii

have on, your Lexus vehicle.

This vehicle should not be modified with non–genuine
Lexus products. Modification with non–genuine Lexus
products could affect its performance, safety or
durability, and may even violate governmental
regulations. In addition, damage or performance
problems resulting from the modification may not be
covered under warranty.

Spark ignition system of your Lexus

The spark ignition system in your Lexus meets all
requirements of the Canadian Interference–Causing
Equipment Standard.

Installation of a mobile two–way radio
system

As the installation of a mobile two–way radio system in
your vehicle could affect electronic systems such as the
multiport fuel injection system/sequential multiport fuel
injection system, cruise control system, anti–lock brake
system and Supplemental Restraint System (SRS), be
sure to check with your Lexus dealer for precautionary
measures or special instructions regarding installation.

Scrapping of your Lexus

The Supplemental Restraint System (SRS) in your
Lexus consists of driver and front passenger airbags,
side airbags and seat belt pretensioners. The SRS
device contains explosive chemicals. If the vehicle is
scrapped with the airbags and seat belt pretensioners
left as they are, it may cause an accident such as a fire.
Be sure to have the SRS removed and disposed of by
a qualified service shop or by your Lexus dealer before
you scrap your vehicle.

iii

FOREWORD

Welcome to the growing group of value–conscious people who drive Lexus
vehicles. We are proud of the advanced engineering and quality construction
of each vehicle we build.

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 vehicle
best and is interested in your complete satisfaction. Your Lexus dealer will
provide quality maintenance and any other assistance you may require.

If there is not a Lexus dealer near you, or you need emergency assistance for
any reason, please call the following number:

U.S. OWNERS

 When traveling in the U.S. mainland or Canada:

Lexus Roadside Assistance 1–800–25–LEXUS (Toll–Free)

 HAWAII:

Lexus Customer Service Assistance 1–800–25–LEXUS (Toll–Free)

CANADIAN OWNERS
 Please refer to the separate ”Owner’s Guide” or ”Owner’s Manual

Supplement”.

Please leave this Owner’s Manual in this vehicle at the time of resale. The
next owner will need this information also.

All information and specifications in this manual are current at the time
of printing. However, because of the Lexus policy of continual product
improvement, we reserve the right to make changes at any time without

(1–800–255–3987)

(1–800–255–3987)

i

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.

REPORTING SAFETY DEFECTS

FOR U.S. OWNERS

If you believe that your vehicle has a defect
which could cause a crash or could cause
injury or death, you should immediately inform
the National Highway Traffic Safety
Administration (NHTSA) in addition to
notifying Toyota Motor Sales, U.S.A., Inc.
(Toll–free: 1–800–25–LEXUS).

If NHTSA receives similar complaints, it may
open an investigation, and if it finds that a
safety defect exists in a group of vehicles, it
may order a recall and remedy campaign.
However, NHTSA cannot become involved in
individual problems between you, your dealer ,
or Toyota Motor Sales, U.S.A., Inc.

To contact NHTSA, you may either call the
Auto Safety Hotline toll–free at

SECTION 7

REPORTING SAFETY DEFECTS
FOR U.S. OWNERS

Reporting safety defects for U.S. owners 475. . . . . . . . .

1–800–424–9393 (or 366–0123 in
Washington.D.C. area) or write to: NHTSA,
U.S. Department of Transportation,
Washington. D.C. 20590. You can also obtain
other information about motor vehicle safety
from the Hotline.

475

SECTION 6 –

SERVICE PROCEDURES AND
SPECIFICATIONS

Body

Specifications 466. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Protecting your vehicle from corrosion 467. . . . . . . . . . .

Washing and waxing 469. . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning the interior 471. . . . . . . . . . . . . . . . . . . . . . . . . . .

5

465

BODY

SPECIFICATIONS

– DIMENSIONS AND WEIGHT

Overall length
Overall width
Overall height
Wheelbase
Tread – Front

Vehicle capacity weight (occupants + luggage)

*: Unladen vehicle

– FUEL TANK

Capacity

466

– Rear

4805 mm (189.2 in.)
1800 mm (70.9 in.)
1440 mm (56.7 in.)*
2800 mm (110.2 in.)
1535 mm (60.4 in.)
1510 mm (59.4 in.)
410 kg (900 lb.)

75 L (19.8 gal., 16.5 lmp.gal.)

BODY

PROTECTING YOUR VEHICLE

FROM CORROSION

Proper care of your Lexus can help ensure long–term
corrosion prevention.

The most common causes of corrosion to your
vehicle are:

 The accumulation of road salt, dirt and moisture in

hard–to–reach areas under the vehicle.

 Chipping of paint or undercoating caused by minor

accidents or by stones and gravel.

The following conditions will cause or accelerate
corrosion of your vehicle, so it is important to keep
your vehicle, particularly the underside, as clean as
possible and to repair any damage to paint or
protective coatings as soon as possible.

 The presence of road salt or dust control chemicals,

salt in the air near the sea coast, industrial air
pollution.

 High humidity , especially at temperatures just above

freezing point.

 Certain parts of your vehicle are wet or damp for an

extended period of time, even though other parts of
the vehicle are dry.

 Components of the vehicle which are prevented from

quick–drying due to lack of proper ventilation are

exposed to high temperature.

467

BODY

To help prevent corrosion on your Lexus, follow
these guidelines:

Keep your vehicle clean by regular washing. In

addition, observe the following points.
 If you drive on salted roads in the winter or if you live

near the ocean, you should hose off the
undercarriage at least once a month to minimize
corrosion.

 High pressure w a te r o r s t ea m i s e ffective for cleaning

the vehicle’s underside and wheel housings. Pay
particular attention to these areas as it is difficult to
see all the mud and dirt. It will do more harm than
good to simply wet the mud and debris without
removing them. The lower edge of doors, rocker
panels and frame members have drain holes which
should not be allowed to clog with dirt as trapped
water in these areas can cause corrosion.

 Wash the underside of the vehicle thoroughly when

winter is over.

See ”Washing and waxing” for more tips.

Check the co n d ition of your vehicle’s paint and trim.

If you find any chips or scratches in the paint, touch them
up immediately to prevent corrosion from starting. If the
chips or scratches have gone through the bare metal,
have a qualified body shop make the repair.

Check the inte r i o r o f your vehicle. Water and dirt can
accumulate under the floor mats and could cause
corrosion. Occasionally check under the mats to make
sure the area is dry. Be particularly careful when
transporting chemicals, cleansers, fertilizers, salt, etc.
These should be transported in proper containers. If a
spill or leak should occur, immediately clean and dry the
area.

Keep your vehicle in a well ventilated garage or a
roofed place. Do not park your vehicle in a damp,
poorly ventilated garage. If you wash your vehicle in

the garage, or if you drive it in covered with water or
snow, your garage may be so damp it will cause
corrosion. Even if your garage is heated, a wet vehicle
can corrode if the ventilation is poor.

468

BODY

WASHING AND WAXING

Washing your Lexus

Keep your vehicle clean by regular washing.

The following cases may cause weakness to the paint
or corrosion to the body and parts. Wash your vehicle
as soon as possible.

 When driving in a coastal area
 When driving on a road sprinkled with antifreeze
 When having stuck of coal tar, tree sap, bird

droppings and carcass of an insect

 When driving in the areas where there is a lot of

smoke, soot, dust, iron dust and chemical substance

 When the vehicle becomes remarkably dirty with dust

and mud

Hand–washing your Lexus

Work in the shade and wait until the vehicle body is
not hot to the touch.

1. Rinse off loose dirt with a hose. Remove any mud or
road salt f r o m t h e underside of the vehicle or in the wheel
wells.

2. Wash with a mild car–wash soap, mixed according to
the manufacturer’s instructions. Use a soft cotton mitt
and keep it wet by dipping it frequently into the wash
water. Do not rub hard – let the soap and water remove
the dirt.

469

BODY

Aluminum wheels: Use only a mild soap or neutral

detergent.
Urethane bumpers and side moldings: Wash

carefully. Do not scrub with abrasive cleaners. The
bumper and side molding faces are soft.

Road tar: Remove with turpentine or cleaners that are
marked safe for painted surfaces.

NOTICE

Do not use gasoline or strong solvents, which
may be toxic or cause damage.

3. Rinse thoroughly – dried soap can cause streaking.
In hot weather you may need to rinse each section right
after you wash it.

4. To prevent water spots, dry the vehicle using a clean
soft cotton towel. Do not rub or press hard – you might
scratch the paint.

Automatic car wash

Your vehicle may be washed in an automatic car wash,
but remember that the paint can be scratched by some
type of brushes, unfiltered washing water, or the
washing process itself. Scratching reduces paint
durability and gloss, especially on darker colors. The
manager of the car wash should be able to advise you
whether the process is safe for the paint on your vehicle.

Waxing your Lexus

Polishing and waxing is recommended to maintain
the original beauty of your Lexus’ finish.

Once a month or if the vehicle does not repel water well,
apply wax.

1. Always wash and dry the vehicle before you begin
waxing, even if you are using a combined cleaner and
wax.

2. Use a good quality polish and wax. If the finish has
become extremely weathered, use a car–cleaning
polish, followed by a separate wax. Carefully follow the
manufacturer’s instructions and precautions. Be sure to
polish and wax the chrome trim as well as the paint.

3. Wax the vehicle again when water does not bead but
remains on the surface in large patches.

470

CLEANING THE INTERIOR

CAUTION

 Be careful not to splash water or spill liquid on the

floor. This may prevent the side airbags from
activating correctly, resulting in serious injury.

 Do not wash the vehicle floor with water, or allow

water to get onto the floor when cleaning the vehicle
interior or exterior. Water may get into audio
components or other electrical components above or
under the floor carpet (or mat) and cause a
malfunction; and it may cause body corrosion.

BODY

471

BODY

Leather Interior

The selected leather is used in your Lexus. Due to a
leather product, some parts of leather may be rough,
uneven or scratched originally.

To keep good appearance, we recommend you to clean
it periodically twice a year.

Remove dirt on the leather in the following ways:

1. Wipe it off lightly using a soft cloth (e.g. gauze)
dampened with 5% solution of neutral detergent for
wool.

2. Wring water from a clean cloth and thoroughly wipe
off all traces of detergent with it.

3. Wipe of f the surface of the leather with a dry soft cloth.
Allow the leather to dry in a ventilated shaded area.
Excess of wet may cause the hardening or shrinking of
the leather.

NOTICE

472



Dirt or sand adhered to the leather may damage
the treated surface and cause it to wear earlier.
Remove dirt or sand using a vacuum cleaner.



If a stain should fail to come out with a neutral
detergent, apply a cleaner that does not
contain an organic solvent.



Never use organic substances such as
benzine, alcohol or gasoline, or alkaline or acid
solutions for cleaning the leather as these
could cause discoloring.



Use of a nylon brush or synthetic fiber cloth,
etc. may scratch the fine grained surface of the
leather.



Mildew may develop on soiled leather
upholstery. Be especially careful to avoid oil
spots. Try to keep your upholstery always
clean.



Long exposure to direct sunlight may cause
the leather surface to harden and shrink. Keep
your vehicle in a shaded area, especially in the
summer.



The interior of your vehicle is apt to heat up on
hot summer days, so avoid placing on the
upholstery items made of vinyl or plastic or
containing wax as these tend to stick to leather
when warm.



Improper cleaning of the leather upholstery
could result in discoloration or staining.

Synthetic Leather Areas
(Dash and sun visors)

The synthetic leather areas may be easily cleaned
with a mild soap or detergent and water.

First vacuum over the upholstery to remove loose dirt.
Then, using a sponge or soft cloth, apply the soap
solution to the synthetic leather . After allowing it to soak
in for a few minutes to loosen the dirt, remove the dirt and
wipe off the soap with a clean damp cloth. If all the dirt
does not come off, repeat the procedure. Commercial
foaming–type cleaners are also available which work
well. Follow the manufacturer’s instructions.

NOTICE

Do not use solvent, thinner, gasoline or window
cleaner on the interior.

Carpets, Windows and Seat Belts

Begin by vacuuming thoroughly to remove as much dirt
as possible. Several types of foam cleaners are
available; some are in aerosol cans and others are
powders or liquids which you mix with water to produce
a foam. T o shampoo the carpets, use a sponge or brush
to apply the foam. Rub in overlapping circles. Do not

BODY

473

BODY

apply water – the best results are obtained by keeping
the carpet as dry as possible. Read the shampoo
instructions and follow them closely.

The seat belts may be cleaned with mild soap and
water or with lukewarm water.

Use a cloth or sponge. As you are cleaning, check the
belts for excessive wear, fraying or cuts.

NOTICE



Use a good foam–type shampoo to clean the
carpets.



Do not use dye or bleach on the belts – it may
weaken them.



Do not use the belts until they become dry.



The windows may be cleaned with any
household window cleaner.



When cleaning the inside of the rear window, be
careful not to scratch or damage the heater
wires.

Air Conditioning Control Panel, Car
Audio, Instrument Panel, Console Panel,
and Switches

Use a soft damp cloth for cleaning.
Soak a clean soft cloth in water or lukewarm water then

lightly wipe off any dirt.

NOTICE



Do not use organic substances (solvents,
kerosene, alcohol, gasoline, etc.) or alkaline or
acidic solutions. These chemicals can cause
discoloring, staining or peeling of the surface.



If you use cleaners or polishing agents, make
sure their ingredients do not include the
substances mentioned above.



If you use a liquid car freshener, do not spill the
liquid onto the vehicle’s interior surfaces. It
may contain the ingredients mentioned above.
Immediately clean any spill using the method
mentioned above.

If you have any questions about the cleaning of your
Lexus, your local Lexus dealer will be pleased to
answer them.

474

SECTION 6 –

SERVICE PROCEDURES AND
SPECIFICATIONS

Electrical components

Specifications 430. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking battery condition 439. . . . . . . . . . . . . . . . . . . . .

Battery recharging precautions 446. . . . . . . . . . . . . . . . .

Checking and replacing the blade type fuses 448. . . . .

Checking the cartridge type fuses 453. . . . . . . . . . . . . . .

Adding washer fluid 455. . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking the headlight aim 455. . . . . . . . . . . . . . . . . . . . .

Replacing light bulbs 459. . . . . . . . . . . . . . . . . . . . . . . . . .

4

429

ELECTRICAL COMPONENTS

SPECIFICATIONS

– FUSE LOCATION

64G004–1

1



Engine compartment

2

Passenger’s side kick panel

3

Driver’s side kick panel

4

Engine compartment (Canada only)

– FUSES

430

64G015



Driver’s side kick panel

64G014



Passenger’s side kick panel

ELECTRICAL COMPONENTS

431

ELECTRICAL COMPONENTS



Engine compartment

64G026

64G013

432



Engine compartment (Canada only)

ELECTRICAL COMPONENTS

433

ELECTRICAL COMPONENTS

No. FUSE AMPERE CIRCUIT

1 WASHER 20 Windshield washer
2 FR FOG 15 Fog lights

Tail lights, Side marker lights,

3 TAIL 10

4 SRS–ACC 15 SRS

5 GAUGE 10

6 FUEL OPN 10 Fuel filler door opener

7

8 PANEL 7.5
9 HEATER 10 Air conditioning

10 SRS–B 5

11 D P/SEA T 30 Power seat system

12
13 WIPER 25 Windshield wipers

14 OBD 7.5 On–board diagnosis

D FR

DOOR

RADIO

NO.2

20

15

License plate lights,
Parking lights

Back–up lights, Gauges and
meters, service reminder
indicators and buzzers

Power window system,
Door lock system,
Wireless remote control

Emergency flashers,
Headlight cleaner

Gauges and meters, service
reminder indicators and
warning buzzers

Audio, Shift lock system

434

No. FUSE AMPERE CIRCUIT

Stop lights,

15 STOP 15

16 CIG 15 Cigarette lighter, Power outlet

17 ECU–IG 15

18 STARTER 5 Starting system

19 IGN 5

20

21 RR FOG 10 No circuit
22 M/R HTR 10 Outside rear view mirror
23 S/ROOF 25 Moon roof

24

25 P P/SEAT 30

D RR

DOOR

P FR

DOOR

20

20

Anti–lock brake system,
Traction control system

Power window, Door lock
system, Wireless remote
control, Theft deterrent system

Multiport fuel injection
system/sequential multiport fuel
injection system, SRS,
Anti–lock brake system,
Vehicle skid control system,
Cruise control system

Power window system,
Door lock system,
Wireless remote control

Power window system,
Door lock system,
Wireless remote control

Power seat system,
Tilt and telescopic steering

ELECTRICAL COMPONENTS

435

ELECTRICAL COMPONENTS

26 DOME 10
27 SEAT HTR 20 Seat heater

No. FUSE AMPERE CIRCUIT

28 4WS 25 No circuit
29 TV 15 No circuit
30 ECU–B2 5 Power seat system

31

32 ECU–B1 20

33 MPX–B 10

34 HORN 10 Horn

35 ETCS 15

36 AM2 15

P RR

DDOR

20

Interior lights, Personal lights,
Vanity lights, Trunk light, Clock

Power window system,
Door lock system,
Wireless remote control

Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system, Trunk
lid opener, Interior lights,
Personal lights, Clock,
Headlight cleaner

Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system,
Trunk lid opener

Electronic throttle control
system

Starting system, Multiport fuel
injection system/sequential
multiport fuel injection system

436

37 TEL 15 No circuit

44

38 TURN–HAZ 10 Turn signal lights

No. FUSE AMPERE CIRCUIT

Multiport fuel injection

39 EFI 25

40 ALT–S 5 Charging system

RADIO

41

42 DRL NO.2 30

43

44

45

46

NO.1

H–LP L

UPR

H–LP R

UPR

DRL NO.1 30

H–LP L

LWR

H–LP R

LWR

20

10

10

15

15

system/sequential multiport fuel
injection system, Emission
control system

Audio

Vehicles with daytime
running light system:

Daytime running light system

Vehicles without daytime
running light system:

Left–hand headlight (high
beam)

Vehicles without daytime
running light system:

Right–hand headlight (high
beam)

Vehicles with daytime
running light system:

Daytime running light system
Left–hand headlight (low beam)

Right–hand headlight (low
beam)

ELECTRICAL COMPONENTS

437

ELECTRICAL COMPONENTS

H–LP R

47

No. FUSE AMPERE CIRCUIT

48



UPR

H–LP L

UPR

SPARE Spare fuse

15

15

Vehicles with daytime
running light system:

Right–hand headlight (high
beam)

Vehicles with daytime
running light system:

Left–hand headlight (high
beam)

438

CHECKING BATTERY

Precautions

ELECTRICAL COMPONENTS

CONDITION

439

ELECTRICAL COMPONENTS

CAUTION

BATTERY PRECAUTIONS
The battery produces flammable and explosive

hydrogen gas.
 Do not cause a spark by contacting the battery

terminals with tools.
 Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive

sulfuric acid.

 Avoid contact with eyes, skin or clothes.
 Never inhale or swallow electrolyte.
 Wear protective safety glasses when working near

the battery.
 Keep children away from the battery.
EMERGENCY MEASURES
 If electrolyte gets in your eyes, flush your eyes with

clean water f o r a t l east 15 minutes and get immediate

medical attention. If possible, continue to apply

water with a sponge or cloth while traveling to the

medical office.

440

ELECTRICAL COMPONENTS

 If electrolyte gets on your skin, thoroughly

wash the contacted area. If you feel a pain or
burn, get medical attention immediately.

 If electrolyte gets on your clothes, there is a

possibility of its soaking through to your skin,
so immediately take off the exposed clothing
and follow the procedure above, if necessary.

 If you happen to swallow electrolyte, drink a

large quantity of water or milk. Follow with milk
of magnesia, beaten raw egg or vegetable oil.
Then go immediately for emergency help.

64G001a

Checking battery exterior

441

ELECTRICAL COMPONENTS

1



Terminals 2Hold–down clamp

Check the battery for corroded or loose
connections, cracks, or loose hold–down clamps.

1. If the battery is corroded, wash it off with a solution of
warm water and baking soda. Coat the terminals with
grease to prevent further corrosion.

2. If the connections are loose, tighten the clamp bolts
– but do not overtighten.

3. Tighten the hold–down clamp only enough to keep
the battery firmly in place. Overtightening may damage
the battery case.

NOTICE



Make sure the engine and all accessories are
turned off before performing maintenance.



When checking the battery, remove the ground
cable first and reinstall it last.



Be careful not to cause a short circuit with
tools.



Take care no solution gets into the battery
when washing it.

Checking battery fluid

There are 2 types of batteries: maintenance type
and non–maintenance type.

A non–maintenance battery has ”MAINTENANCE
FREE BATTERY” on its top. A maintenance type battery
does not have such indication.

Maintenance type battery

Check the fluid condition by the fluid level lines on the
side of the battery. Or if the battery has a hydrometer on
its top, you can also check the hydrometer.

Non–maintenance battery

Check the battery condition by the hydrometer on the top
of the battery.

442

(a) Checking by the fluid level lines (Maintenance
type battery only)

64G002b

1



Upper line 2Lower line

The fluid (electrolyte) level must be between the
upper and lower lines.

When checking the fluid level, look at all six cells, not just
one or two.

If the level is lower than the lower line, add distilled water.
(See ”Adding distilled water” on page 444.)

ELECTRICAL COMPONENTS

(b) Checking by the hydrometer

443

ELECTRICAL COMPONENTS

64G003a

Check the battery condition by the hydrometer
color.

Maintenance type battery

1

BLUE – Good condition.

2

WHITE – Charging necessary. Have the battery
checked by your Lexus dealer.

3

RED – Add distilled water. (See ”Adding distilled
water” described below.)

Non–maintenance type battery

1

BLUE – Good condition.

2

WHITE – Charging necessary. Have the battery
checked by your Lexus dealer.

3

RED – Have the battery checked by your Lexus
dealer.

444

NOTICE

For non–maintenance battery:
Do not refill the battery with water.

Adding distilled water
(Maintenance type battery only)

64L062

1



Low 2O.K.

1. Remove the vent plugs.

2. Add distilled water to cells needing fluid.
If the side of your battery is covered, check the water

level by looking down directly above the cell as
illustrated above.

3. Retighten the vent plugs securely.

ELECTRICAL COMPONENTS

NOTICE



Do not overfill the cells. Excess electrolyte
could squirt out of the battery during heavy
charging, causing corrosion or damage.



Use a cover on the battery for longer life.

445

ELECTRICAL COMPONENTS

BATTERY RECHARGING

PRECAUTIONS

During recharging, the battery is producing
hydrogen gas.

Therefore, before recharging:

1. Maintenance type batteries – Remove the vent plugs.

2. If recharging with the battery installed on the vehicle,
be sure to disconnect the ground cable.

3. Make sure the power switch on the recharger is off
when connecting the charger cables to the battery and
when disconnecting them.

CAUTION

 Always charge the battery in an unconfined area. Do

not charge the battery in a garage or closed room

where there is not sufficient ventilation.
 Non–maintenance batteries: Only do a slow charge

(5 A or less). Charging at a quicker rate is dangerous.

The battery may explode causing personal injuries.

Maintenance type batteries: Be sure to remove the

vent plugs before recharging.

446

NOTICE

Never recharge the battery while the engine is
running. Also, be sure all accessories are turned
off.

ELECTRICAL COMPONENTS

447

ELECTRICAL COMPONENTS

CHECKING AND REPLACING

THE BLADE TYPE FUSES

64G006–1



Driver’s side kick panel

64G017

448



Passenger’s side kick panel

64G005–2



Engine compartment 1Spare fuses

2

Pull–out tool

64G027

ELECTRICAL COMPONENTS

449

ELECTRICAL COMPONENTS



Engine compartment (Canada only)

1. Turn the ignition switch off and open the fuse box
lid.

Determine whic h f use may be causing the problem. The
lid of the fuse box shows the name of the circuit for each
fuse.

64L013

2. Make sure the inoperative component is turned
off. Pull the suspected fuse straight out with the
pull–out tool and check it. If it has blown, push a new
fuse into the clips.

450

64G008



Good

a. Look carefully at the fuse. If the thin wire is broken,
the fuse has blown. If you are not sure or if it is too dark
to see, try replacing the suspected fuse with one of the
same value that you know is good.

b. Install only a fuse with the amperage rating
designated on the fuse box lid.

If you do not have a spare fuse, in an emergency you can
pull out t h e ” C I G ” , ” RAD NO.1” or ”OBD” fuse, which may
be dispensable for normal driving, and use it if its
amperage rating is the same.

If you cannot use one of the same amperage, use one
lower than, but as close as possible to, the amperage.
If the amperage is lower than that specified, the fuse
might blow out again but this does not indicate anything
wrong. Be sure to get the correct fuse as soon as
possible and return the substitute to its original clips.



Blown

ELECTRICAL COMPONENTS

It is a good idea to purchase a set of spare fuses and
keep them in your vehicle for emergencies.

If the new fuse immediately blows out, there is a problem
with the electrical system. Have your Lexus dealer
correct it as soon as possible.

451

ELECTRICAL COMPONENTS

CAUTION

Never use a fuse with a higher amperage rating, or any
other object, in place of a fuse. This may cause
extensive damage and possibly a fire.

452

CHECKING THE CARTRIDGE

TYPE FUSES

64G019–1

ELECTRICAL COMPONENTS

453

ELECTRICAL COMPONENTS

1



Good 2Melted

If the headlights or other electrical components do
not work and the blade type fuses are O.K., check
the cartridge type fuses. If any of the cartridge type
fuses are blown, they must be replaced.

If there is an overload in the circuits from the battery, the
fuses are designed to blow before the entire wiring
harness is damaged.

NOTICE

Before replacing the fuses, have the cause of
electrical overload determined and repaired by
your Lexus dealer.

CAUTION

Always use a genuine Lexus fuse or equivalent for
replacement. Never install an ordinary wire – even for
a temporary fix. This may cause extensive damage and
possibly a fire.

454

ADDING WASHER FLUID

64G009

ELECTRICAL COMPONENTS

If the washer tank becomes nearly empty, add
washer fluid.

You may use plain water as washer fluid. However, in
cold areas where temperatures range below the
freezing point, use washer fluid containing antifreeze.
This product is available at your Lexus dealer and most
auto parts stores. Follow the manufacturer’s directions
for how much to mix with water.

NOTICE

Do not use engine antifreeze or any other
substitute because it may damage your vehicle’s
paint.

CHECKING THE HEADLIGHT

AIM

455

ELECTRICAL COMPONENTS

64G020b

1



Beam angle gauge (vertical movement)

2

Beam angle gauge (horizontal movement)

Before checking the headlight aim:

1. Be sure that the body around the headlight is not
deformed.

2. Park the vehicle on a level spot.

3. The driver gets into the driver’s seat and puts the
vehicle in a state readying for a driving (with a full tank).

4. Bounce the vehicle several times.

Adjusting the headlight aiming

456

1



Adjusting bolt A

2

Adjusting bolt B

ELECTRICAL COMPONENTS

64g059

457

ELECTRICAL COMPONENTS

64G021a

1



Bubble 2Acceptable range

Vertical movement gauge: The bubble of the gauge

should not deviate from the center of the gauge by more
than 2 marks to either side of the gauge.

If the bubble is out of the acceptable range of the beam
angle gauge, adjust it using bolt A.

458

64G022a

1



Mark 2Acceptable range

Horizontal movement gauge: The mark should not

deviate by more than one mark to either side of the
gauge.

If the edge of the lens does not match “0” mark, adjust
the lens using bolt B.

If the error is over the value specified above, take the
vehicle to your Lexus dealer to adjust the headlight aim.

After adjusting the headlight in the vertical direction,
check that the light has been shifted from the adjusted
position in the horizontal direction.

ELECTRICAL COMPONENTS

REPLACING LIGHT BULBS

The illustration on the following pages show the
locations of light bulbs. If it is necessary to replace a
bulb, take your vehicle to your Lexus dealer as soon as
possible. Use bulbs with the bulb numbers and wattage
ratings given in the table.

459

ELECTRICAL COMPONENTS

CAUTION

 Do not disassemble, repair or take apart the low beam

headlight bulbs, connector, power supply circuits

and rotated components. Or you may be injured by

electric shocks. Call your dealer when the headlights

fail to work or have to be replaced or disposed of.
 Halogen bulbs have pressurized gas inside and

require special handling. They can burst or shatter if

scratched or dropped. Hold a bulb only by its plastic

or metal case. Do not touch the glass part of a bulb

with bare hands.

NOTICE

Only use a bulb of the listed type.

64G023–1

460

LIGHT LOCATION

Light Bulbs Bulb No. W T

ype

1 Headlight (Low beam)

Discharge bulb D2R 35

B

Halogen bulb HB4 51

C

2 Front turn signal light 1156 21

D

3 Headlight (High beam) HB3 60

A

4 Parking light ––– 5

D

5 Fog light HB4 51

C

6 Front side marker light 194 3.8

D

ELECTRICAL COMPONENTS

461

ELECTRICAL COMPONENTS

64G024

462

Light Bulbs Bulb No. W T

ype

1 High mounted stoplight 921 5

D

2 Trunk light 194 3.8

D

3 License plate light ––– 5

D

4 Tail/stop light ––– 5/21

D

5 Back–up light ––– 21

D

6 Tail light ––– 5

D

7 Rear turn signal light ––– 21

D

8 Tail/stop light ––– 5/21

D

ELECTRICAL COMPONENTS

463

ELECTRICAL COMPONENTS

64G059

Light Bulbs Bulb No. W T

ype

1 Front personal lights ––– 8

F

2 Vanity lights ––– 3

E

3 Front interior lights ––– 8

E

4 Rear personal lights ––– 5

F

5 Door courtesy lights 194 3.8

D

6 Foot lights ––– 1.4

D

464

7 Glove box light ––– 1.2

D

A: HB3 halogen
bulbs

B: D2R discharge
bulbs

C: HB4 halogen
bulbs

D: Wedge base
bulbs

E: Double end
bulbs

F: Single end bulbs

SECTION 6 –

SERVICE PROCEDURES AND
SPECIFICATIONS

Chassis

Specifications (GS400) 404. . . . . . . . . . . . . . . . . . . . . . . .

Specifications (GS300) 406. . . . . . . . . . . . . . . . . . . . . . . .

Checking brake fluid 408. . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking power steering fluid (GS400) 411. . . . . . . . . .

Checking power steering fluid (GS300) 413. . . . . . . . . .

Checking tire pressure 416. . . . . . . . . . . . . . . . . . . . . . . . .

Rotating tires 419. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking and replacing tires 420. . . . . . . . . . . . . . . . . . .

Installing snow tires and chains 423. . . . . . . . . . . . . . . . .

Replacing wheels 426. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aluminum wheel precautions 426. . . . . . . . . . . . . . . . . . .

Suspension and chassis 427. . . . . . . . . . . . . . . . . . . . . . .

3

403

CHASSIS

SPECIFICATIONS (GS400)

– AUTOMATIC TRANSMISSION

Fluid capacity

Drain and refill

Fluid type

– DIFFERENTIAL

1.9 L (2.0 qt., 1.7 lmp.qt.)
Automatic transmission fluid Type T – IV or

equivalent

Oil capacity
Oil type
Oil viscosity

– BRAKES

Pedal clearance *
Pedal freeplay
Brake pad wear limit
Parking brake lining wear limit
Parking brake adjustment *
Fluid type

*1: Minimum pedal clearance when depressed with the pressure of 196 N (20 kgf, 44 lbf.) with the engine running
*2: Parking brake adjustment when depressed with the pressure of 294 N (30 kgf, 66.1 lbf.)

404

1

2

1.35 L (1.42 qt., 1.19 lmp.qt.)
Hypoid gear oil API GL–5
Above –18C (0F): SAE 90

Below –18C (0F): SAE 80W or SAE 80W–90

93 mm (3.7 in.) Min.

0.2 – 2 mm (0.008 – 0.08 in.)

1.0 mm (0.04 in.)

1.0 mm (0.04 in.)
7 – 9 clicks
SAE J1703 or FMVSS No. 116 DOT 3

– STEERING

CHASSIS

Freeplay
Power steering fluid

– TIRES AND WHEELS

Tire size

Tire inflation pressure

Recommended cold tire inflation pressure

225/55R16 94V
235/45ZR17

Wheel size
Wheel nut torque

Less than 30 mm (1.2 in.)
Automatic transmission fluid DEXRON



II or III

Type A: 225/55R16 94V
Type B: 235/45ZR17

2

Front 220 kPa (2.2 kgf/cm
Rear 220 kPa (2.2 kgf/cm
Front 230 kPa (2.3 kgf/cm
Rear 230 kPa (2.3 kgf/cm

or bar, 32 psi)

2

or bar, 32 psi)

2

or bar, 33 psi)

2

or bar, 33 psi)

For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 70 kPa (0.8 kgf/cm

2

, 0.7 bar, 10 psi) to the
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.

Type A: 16 x 7

1/2 JJ

Type B: 17 x 8 JJ
103 N·m (10.5 kgf·m, 76 ft·lbf.)

405

CHASSIS

SPECIFICATIONS (GS300)

– AUTOMATIC TRANSMISSION

Fluid capacity

Drain and refill

Fluid type

– DIFFERENTIAL

2.4 L (2.5 qt., 2.1 lmp.qt.)
Automatic transmission fluid Type T – IV or

equivalent

Oil capacity
Oil type
Oil viscosity

– BRAKES

Pedal clearance *
Pedal freeplay
Brake pad wear limit
Parking brake lining wear limit
Parking brake adjustment *
Fluid type

*1: Minimum pedal clearance when depressed with the pressure of 196 N (20 kgf, 44 lbf.) with the engine running
*2: Parking brake adjustment when depressed with the pressure of 294 N (30 kgf, 66.1 lbf.)

– STEERING

406

1

2

1.35 L (1.42 qt., 1.19 lmp.qt.)
Hypoid gear oil API GL–5
Above –18C (0F): SAE 90

Below –18C (0F): SAE 80W or SAE 80W–90

93 mm (3.7 in.) Min.

0.2 – 2 mm (0.008 – 0.08 in.)

1.0 mm (0.04 in.)

1.0 mm (0.04 in.)
7 – 9 clicks
SAE J1703 or FMVSS No. 116 DOT 3

CHASSIS

Freeplay
Power steering fluid

– TIRES AND WHEELS (Type A)

Tire size
Tire inflation pressure

Recommended cold tire inflation pressure

Wheel size
Wheel nut torque

– TIRES AND WHEELS (Type B)

Less than 30 mm (1.2 in.)
Automatic transmission fluid DEXRON



II or III

P215/60R16 94V

2

Front 210 kPa (2.1 kgf/cm
Rear 210 kPa (2.1 kgf/cm

or bar, 30 psi)

2

or bar, 30 psi)

For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 90 kPa (1.0 kgf/cm

2

, 0.9 bar, 13 psi) to the
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.

1/2 JJ

16 x 7
103 N·m (10.5 kgf·m, 76 ft·lbf.)

407

CHASSIS

Tire size
Tire inflation pressure

Recommended cold tire inflation pressure

Wheel size
Wheel nut torque

CHECKING BRAKE FLUID

63G002–1

225/55R16 94V

2

Front 220 kPa (2.2 kgf/cm
Rear 220 kPa (2.2 kgf/cm

For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 80 kPa (0.9 kgf/cm
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.

1/2 JJ

16 x 7
103 N·m (10.5 kgf·m, 76 ft·lbf.)

or bar, 32 psi)

2

or bar, 32 psi)

2

, 0.8 bar, 12 psi) to the

408

To check the fluid level, simply look at the
see–through reservoir . T h e level should be between
the ”MAX” and ”MIN” lines on the tank.

It is normal for the brake fluid level to go down slightly as
the brake pads wear or when the fluid level in the
accumulator is high.

If the reservoir needs frequent refilling, it may indicate a
serious mechanical problem.

If the level is low, add FMVSS No.116 DOT 3 or SAE
J1703 brake fluid to the brake reservoir.

Refilling brake fluid:

1. Turn the ignition switch off.

2. Depress the brake pedal more than 40 times.

3. Remove the reservoir cover by hand. Add brake fluid
up to the ”MAX” line.

If you do not follow the procedure above, the reservoir
may overflow.

Use only newly opened brake fluid. Once opened, brake
fluid absorbs moisture from the air , and excess moisture
can cause a dangerous loss of braking efficiency.

CHASSIS

409

CHASSIS

CAUTION

Take care when filling the reservoir because brake fluid
can harm your hands or eyes and damage painted
surfaces. If fluid gets in your hands or eyes, flush them
with clean water.

410

CHECKING POWER STEERING

FLUID (GS400)

63G003–1

Check the fluid level through the reservoir. If
necessary, add automatic transmission fluid
DEXRON

If the vehicle has been driven around 80 km/h (50 mph)
for 20 minutes (a little more in frigid temperatures), the
fluid is hot (60C – 80C or 140F – 175F). You may
also check the level when the fluid is cold (about room
temperature, 10C – 30C or 50F – 85F) if the engine
has not been run for about five hours.



II or III.

CHASSIS

411

CHASSIS

63G006–1

1



If hot O.K. 2If hot add 3If cold O.K.

4

If cold add

Clean all dirt off the reservoir and look at the fluid level.
If the fluid is cold, the level should be in the ”COLD”
range. Similarly , if it is hot, the fluid level should b e in t he
”HOT” range. If the level is at the low side of the
appropriate range, add automatic transmission fluid
DEXRON

To remove the filler cap, turn it counterclockwise and lift
up. To reinstall it, turn it clockwise. After replacing the
filler cap, visually check the steering box case, vane
pump and hose connections for leaks or damage.



II or III to bring the level within the range.

CAUTION

The reservoir may be hot so be careful not to burn
yourself.

412

CHASSIS

NOTICE

Avoid overfilling, or the power steering could be
damaged.

CHECKING POWER STEERING

FLUID (GS300)

413

CHASSIS

63G004–1

Check the fluid level on the dipstick. If necessary,
add automatic transmission fluid DEXRON

If the vehicle has been driven around 80 km/h (50 mph)
for 20 minutes (a little more in frigid temperatures), the
fluid is hot (60C – 80C or 140F – 175F). You may
also check the level when the fluid is cold (about room
temperature, 10C – 30C or 50F – 85F) if the engine
has not been run for about five hours.

414



II or III.

63L003–1

1



If cold O.K. 2If hot O.K. 3Add fluid

1. Clean all dirt off the reservoir.

2. Remove the filler cap by turning it counterclockwise
and wipe the dipstick clean.

3. Reinstall the filler cap.

4. Remove the filler cap again and look at the fluid level.
If the fluid is cold, the level should be in the ”COLD”
range on the dipstick. Similarly , if it is h ot, the flu id level
should be in the ”HOT” range. If the level is at the low
side of either range, add automatic transmission fluid
DEXRON

5. After replacing the filler cap, visually check the
steering box case, vane pump and hose connections for
leaks or damage.



II or III to bring the level within the range.

CHASSIS

415

CHASSIS

CAUTION

The reservoir may be hot so be careful not to burn
yourself.

NOTICE

Avoid overfilling, or the power steering could be
damaged.

416

CHECKING TIRE PRESSURE

63G005

The recommended cold tire pressures, tire size and
the vehicle capacity weight are given on the label.

Y ou should check the tire pressures every two weeks, or
at least once a month. And don’t forget the spare! The
pressure for the spare tire should be the same with that
for the standard tire. (See page 405 or 407.) Incorrect
tire pressure can reduce tire life and make your vehicle
less safe to drive.

Low tire pressure results in excessive wear, poor
handling, reduced fuel economy, and the possibility of
blowouts from overheated tires. Also, low tire pressure
can cause poor sealing of the tire bead. If the tire
pressure is excessively low, there is the possibility of
wheel deformation and/or tire separation. So keep your
tire pressures at the proper level. If a tire needs frequent
refilling, have it checked by your Lexus dealer.

CHASSIS

417

CHASSIS

High tire pressure produces a harsh ride, handling
problems, excessive wear at the center of the tire tread,
and a greater possibility of tire damage from road
hazards.

The following instructions for checking tire pressure
should be observed:

 The pressure should be checked only when the

tires are cold. If your vehicle has been parked for at

least 3 hours and has not been driven for more than

1.5 km or 1 mile since, you will get an accurate cold
tire pressure reading.

 Always use a tire pressure gauge. The

appearance of the tire can be misleading. Besides,
tire pressures that are even just a few pounds off can
degrade handling and ride.

 Do not bleed or reduce tire pressure after driving.

It is normal for the tire pressure to be higher after
driving.

 Never exceed the vehicle capacity weight. The

passengers and luggage weight should be located so
that the vehicle is balanced.

 Be sure to reinstall the tire valve caps. Without the

valve caps, dirt or moisture could get into the valve
core and cause air leakage. If the caps have been
lost, have new ones put on as soon as possible.

418

ROTATING TIRES

63L008-1

CHASSIS

To equalize tire wear and help extend tire life, Lexus
recommends that you rotate your tires
approximately every 12000 km (7500 miles).
However, the most appropriate timing for tire
rotation may vary according to your driving habits
and road surface conditions.

The wheel assemblies must be rotated as illustrated
above.

When rotating tires, check for uneven wear and
damage. Abnormal wear is usually caused by incorrect
tire pressure, improper wheel alignment, out–of balance
wheels, or severe braking.

Before storing radial, snow or studded tires, mark the
direction of rotation and be sure to install them in the
same direction when using them again. Tires should be
stored in a cool dry place.

419

CHASSIS

CHECKING AND REPLACING

TIRES

When to replace your tires

63G001

1



New tread 2Tread wear indicator

3

Worn tread

Replace the tires when the tread wear indicators
show. The location of the tread wear indicators is
shown by the ”TWI” or ”
sidewall of each tire.

The tires on your Lexus have built–in tread wear
indicators to help you know when the tires need
replacement. When the tread depth wears to 1.6 mm
(0.06 in.) or less, the indicators will appear. If you can
see the indicators in two or more adjacent grooves, the
tire should be replaced.

∆” marks molded on the

Vehicles equipped with 235/45R17 tires: Your Lexus
has been fitted with specially developed tires which
provide exceptional dynamic performance under
general road conditions. However your riding comfort
may worsen a little and road noise may increase during
driving. You may also notice that your tires will wear
more rapidly and tire grip performance will be reduced
on the snowy and/or icy roads when compared to
standard tires. Be sure to have snow tires or tire chains
on the snowy and/or icy roads and drive carefully with
the speed appropriate for road conditions.

The effectiveness of snow tires is lost if the tread

420

CHASSIS

wears down below 4 mm (0.16 in.).
If you have tire damage such as cuts, splits, cracks

deep enough to expose the fabric, or bulges
indicating internal damage, the tire should be
replaced.

If a tire often goes flat or cannot be properly repaired due
to the size or location of a cut or other damage, it should
be replaced. If you are not sure, consult with your Lexus
dealer.

If an air loss occurs while driving, do not continue driving
with a deflated tire. Driving even a short distance can
damage a tire beyond repair.

Any tires which are over 6 years old must be
checked by a qualified technician even if damage is
not obvious.

Tires deteriorate with age even if they have never or
seldom been used.

This also applies to the spare tire and tires stored for
future use.

Uniform tire quality grading

This information has been prepared in accordance
with regulations issued by the National Highway
Traffic Safety Administration of the U.S. Department
of Transportation. It provides the purchasers and/or
prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.

Your Lexus dealer will help answer any questions
you may have as you read this information.

DOT quality grades – All passenger vehicle tires
must conform to Federal Safety Requirements in
addition to these grades. These quality grades are
molded on the sidewall.

Treadwear – The treadwear grade is a comparative

rating based on the wear rate of the tire when tested
under controlled conditions on a specified government
test course. For example, a tire graded 150 would wear
one and a half (1 – 1/2) times as well on the government
course as a tire graded 100. The relative performance
of tires depends upon the actual conditions of their use,
however, and may depart significantly from the norm
due to variations in driving habits, service practices and
differences in road characteristics and climate.

Traction AA, A, B, C – The traction grades, from highest
to lowest, are AA, A, B and C, and they represent the
tire’s ability to stop on wet pavement as measured under
controlled conditions on specified government test
surfaces of asphalt and concrete. A tire marked C may
have poor traction performance.

421

CHASSIS

Warning: The traction grade assigned to this tire is
based on braking (straight ahead) traction tests and
does not include cornering (turning) traction.

Temperature A, B, C – The temperature grades are A
(the highest), B, and C, representing the tire’s resistance
to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified
indoor laboratory test wheel. Sustained high
temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade
C corresponds to a level of performance which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel than the minimum required by law.

Warning: The temperature grade of this tire established
for a tire that is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading,
either separately or in combination, can cause heat
buildup and possible tire failure.

Tire selection

When replacing a tire, use only the same size and
construction as originally installed and with the
same or greater load capacity.

Using any other size or type of tire may seriously affect
handling, ride, speedometer/odometer calibration,
ground clearance, and clearance between the body and
tires or snow chains.

422

CHASSIS

Do not mix radial, belted, or conventional tires on
your vehicle.

Do not use tires or wheels other than the
manufacturer’s recommended size.

It can cause dangerous handling characteristics,
resulting in loss of control. If you need to change from
conventional tires to radial tires or vice versa, replace
them as a set.

INSTALLING SNOW TIRES AND

CHAINS

When to use snow tires or chains

Snow tires or chains are recommended when
driving on snow or ice.

On wet or dry roads, conventional or radial tires provide
better traction than snow or studded tires.

CAUTION

 Do not drive with the snow tires incorrectly inflated.
 Never drive over 120 km/h (75 mph) with any type of

snow tires.

Snow tire selection

If you need snow tires, select the same size,
construction and load capacity as the original tires
on your Lexus.

Do not use tires other than stated above. Since your
vehicle has radial tires as original equipment, make sure
your snow tires also have radial construction. Do not
install studded tires without first checking local
regulations for possible restrictions.

Snow tire installation

Snow tires should be installed on all wheels.

Installing snow tires on the rear wheels only can lead to
an excessive difference in road grip capability between
the front and rear tires which could cause loss of vehicle
control.

423

CHASSIS

Tire chain selection

Regulations regarding the use of tire chains vary
according to location or type of road. Always check
the local regulations before installing chains.

Use SAE Class ”S” type radial tire chains, with the
exception of radial cable chains or V–bar type chains.

Chain installation

Install the chains on the rear tires as tightly as
possible. Do not use tire chains on the front tires.
Retighten chains after driving 0.5 – 1.0 km (1/4 – 1/2
mile).

When installing chains on your tires, carefully follow the
instructions of the chain manufacturer.

424

CAUTION

 Do not exceed 50 km/h (30 mph) or the chain

manufacturer’s recommended speed limit,
whichever is lower.

 Drive carefully avoiding bumps, holes, and sharp

turns, which may cause the vehicle to bounce.

 Avoid sharp turns or locked–wheel braking, as use of

chains may adversely affect vehicle handling.

CHASSIS

425

CHASSIS

REPLACING WHEELS

When to replace your wheels

If you have wheel damage such as bends, cracks or
heavy corrosion, the wheel should be replaced.

If you fail to replace damaged wheels, a tire may slip off
a wheel or they may cause loss of handling control.

Replacement with used wheels is not recommended as
they may have been subjected to rough treatment or
high mileage and could fail without warning. Also, bent
wheels which have been straightened may have hidden
structural damage and therefore should not be used.
Never use an inner tube in a leaking wheel which is
designed for a tubeless tire.

Wheel selection

When replacing wheels, care should be taken to
ensure that they are equivalent to those removed in
load capacity, diameter, rim width, and offset.

Correct replacement wheels are available at your Lexus
dealer.

A wheel of a different size or type may adversely affect
handling, wheel and bearing life, brake cooling,
speedometer/odometer calibration, stopping ability,
headlight aim, bumper height, vehicle ground clearance,
and tire or snow chain clearance to the body and
chassis.

ALUMINUM WHEEL

PRECAUTIONS

 After driving your vehicle the first 1600 km (1000

miles), check that the wheel nuts are tight.

 If you have rotated, repaired, or changed your tires,

check that the wheel nuts are still tight after driving
1600 km (1000 miles).

 When using tire chains, be careful not to damage the

aluminum wheels.

 Use only the Lexus wheel nuts and wrench designed

for your aluminum wheels.

 When balancing your wheels, use only Lexus

balance weights or equivalent and a plastic or rubber
hammer.

 As with any wheel, periodically check your aluminum

wheels for damage. If damaged, replace
immediately.

426

SUSPENSION AND CHASSIS

CAUTION

Do not modify the suspension/chassis with lift kits,
spacers, springs, etc. It can cause dangerous handling
characteristics, resulting in loss of control.

CHASSIS

427

CHASSIS

428

SECTION 6 –

SERVICE PROCEDURES AND
SPECIFICATIONS

Engine

Specifications (GS400) 379. . . . . . . . . . . . . . . . . . . . . . . .

Specifications (GS300) 383. . . . . . . . . . . . . . . . . . . . . . . .

Fuel 387. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Facts about engine oil consumption 389. . . . . . . . . . . . .

Used engine oil 391. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking the engine oil level 392. . . . . . . . . . . . . . . . . . .

Checking the engine coolant level 397. . . . . . . . . . . . . . .

Spark plugs 401. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

378

SPECIFICATIONS (GS400)

– GENERAL

ENGINE

Model
Type
Bore and stroke
Displacement
V alve clearance (engine cold)

Intake
Exhaust

Drive belt tension

– LUBRICATION SYSTEM

1UZ–FE
8 cylinder V type, 4 cycle, gasoline

87.5 X 82.5 mm (3.44 X 3.25 in.)
3969 cm

0.15 – 0.25 mm (0.006 – 0.010 in.)

0.25 – 0.35 mm (0.010 – 0.014 in.)
Automatic adjustment

3

(242.1 cu.in.)

379

ENGINE

Oil capacity

Drain and refill

with filter
without filter

Oil grade
Recommended oil viscosity (SAE):

– COOLING SYSTEM

5.2 L (5.5 qt., 4.6 lmp.qt.)

4.9 L (5.2 qt., 4.3 lmp.qt.)
API SJ, ”Energy–Conserving” multigrade engine oil or
ILSAC multigrade engine oil

380

Capacity
Coolant type

– FUEL

Fuel type
Octane rating

9.3 L (9.8 qt., 8.2 lmp.qt.)
”Toyota Long Life Coolant” or equivalent
With ethylene–glycol type coolant for a proper

corrosion protection of aluminum components
Do not use alcohol type antifreeze or plain water

62L005–1

alone.

Temperature range anticipated before next oil change

Only UNLEADED
91 (Research octane number 96) or higher

– IGNITION SYSTEM

ENGINE

Spark plug – Make DENSO

NGK

– Gap

SK20R11
IFR6A11

1.1 mm (0.043 in.)

381

ENGINE

– ELECTRICAL SYSTEM

Battery – Maintenance type battery

Specific gravity reading at 20C (68F):

Charging rates Quick charge

Slow charge

– Non–maintenance battery

Open voltage at 20C (68F):

Charging rates

1.260 Fully charged

1.160 Half charged

1.060 Discharged
15A max.

5A max.

12.7V Fully charged

12.3V Half charged

11.9V Discharged
[Voltage that is checked 20 minutes after the key is
removed with all the lights turned off]

5A max.

382

SPECIFICATIONS (GS300)

– GENERAL

ENGINE

Model
Type
Bore and stroke
Displacement
V alve clearance (engine cold)

Intake
Exhaust

Drive belt tension

– LUBRICATION SYSTEM

2JZ–GE
6 cylinder in line, 4 cycle, gasoline

86.0 X 86.0 mm (3.39 X 3.39 in.)
2997 cm

0.15 – 0.25 mm (0.006 – 0.010 in.)

0.25 – 0.35 mm (0.010 – 0.014 in.)
Automatic adjustment

3

(182.9 cu.in.)

383

ENGINE

Oil capacity

Drain and refill

with filter
without filter

Oil grade
Recommended oil viscosity (SAE):

– COOLING SYSTEM

5.4 L (5.7 qt., 4.8 lmp.qt.)

5.1 L (5.4 qt., 4.5 lmp.qt.)
API SJ, ”Energy–Conserving” multigrade engine oil or
ILSAC multigrade engine oil

384

Capacity
Coolant type

– FUEL

Fuel type
Octane rating

7.7 L (8.1 qt., 6.8 lmp.qt.)
”Toyota Long Life Coolant” or equivalent
With ethylene–glycol type coolant for a proper

corrosion protection of aluminum components
Do not use alcohol type antifreeze or plain water

62L005–1

alone.

Temperature range anticipated before next oil change

Only UNLEADED
91 (Research octane number 96) or higher

– IGNITION SYSTEM

ENGINE

Spark plug – Make DENSO

NGK

– Gap

PK16TR11
BKR5EKPB11

1.1 mm (0.043 in.)

385

ENGINE

– ELECTRICAL SYSTEM

Battery – Maintenance type battery

Specific gravity reading at 20C (68F):

Charging rates Quick charge

Slow charge

– Non–maintenance battery

Open voltage at 20C (68F):

Charging rates

1.260 Fully charged

1.160 Half charged

1.060 Discharged
15A max.

5A max.

12.7V Fully charged

12.3V Half charged

11.9V Discharged
[Voltage that is checked 20 minutes after the key is
removed with all the lights turned off]

5A max.

386

ENGINE

FUEL

Fuel type

Y our vehicle must use only unleaded gasoline.

To help prevent gas station mixups, your Lexus has a
smaller fuel tank opening. The special nozzle on pumps
with unleaded fuel will fit it, but the larger nozzle on
pumps with leaded gas will not.

At a minimum, the gasoline you use should meet the
specifications of ASTM D4814 in the U.S.A. and CGSB

3.5–M93 in Canada.

NOTICE

Do not use leaded gasoline. Use of leaded
gasoline will cause the three–way catalytic
converter to lose its effectiveness and the
emission control system to function improperly.
Also, this can increase maintenance costs.

Octane rating

Select premium unleaded gasoline with an Octane
Rating of 91 ( Research Octane Number 96) or higher
for optimum engine performance. However, if such
premium type cannot be obtained, you may
temporarily use unleaded gasoline with an Octane
Rating as low as 87 (Research Octane Number 91).

Use of unleaded fuel with an octane number or rating
lower than stated above will cause persistent heavy
knocking. If severe, this will lead to engine damage.

If your engine knocks ...

If you detect heavy knocking even when using the
recommended fuel, or if you hear steady knocking while
holding a steady speed on level roads, consult your
Lexus dealer.

However, now and then, you may notice light knocking
for a short time while accelerating or driving up hills. This
is no cause for concern.

Gasolines containing detergent additives

Lexus recommends use of gasolines that contain
detergent additives to avoid build–up of engine
deposits.

For further details, ask your Lexus dealer or a local
gasoline retailer.

Improved gasolines

The American Automobile Manufacturers
Association (AAMA) has developed a specification
of improved gasolines. The AAMA specification
offers optimal fuel information for better vehicle
performance and better protection of your engine.

Lexus recommends the use of gasolines that meet the
AAMA specification, if available, for improved drivability

387

ENGINE

and emission control system.

Gasolines containing MTBE

Gasolines that contain MTBE (Methyl Tertiary–Butyl
Ether) are available in the market. If you use a
gasoline mixed with MTBE, make certain that it does
not contain more than 15% of MTBE.

Gasolines containing MMT

Some gasolines contain an octane–enhancing
additive called MMT (methylcyclopentadienyl
manganese tricarbonyl).

Lexus does not recommend the use of gasolines that
contain MMT. If fuels containing MMT are used, your
emission control system may be adversely affected.
The Malfunction Indicator Lamp on the instrument
cluster may come on. If this happens, contact your
Lexus dealer for service.

Gasolines containing alcohol

Gasohol is a mixture of gasoline and ethanol. If you
use gasohol in your Lexus, be sure that it is
unleaded, has an octane rating no lower than 87 and
does not contain more than 10% ethanol. Lexus
does not recommend the use of gasolines
containing methanol.

If you use gasoline containing methanol, use only
gasoline meeting the requirements above and also
containing less than 5% methanol with cosolvents and
corrosion inhibitors for methanol.

388

ENGINE

Gasolines quality

In a very few cases, you may experience driveability
problems caused by the particular gasoline that you are
using. If you continue to have unacceptable driveability,
try changing gasoline brands. If that does not rectify
your problem, then consult your Lexus dealer.

NOTICE



Do not use gasohol other than stated above. It
will cause fuel system damage or vehicle
performance problems.



If drivability problems are encountered (poor
hot starting, vaporizing, engine knock, etc.),
discontinue its use.



Take care not to spill gasohol during refueling.
Gasohol may cause paint damage.

Fuel tank capacity

75 L (19.8 gal., 16.5 lmp.gal.)

FACTS ABOUT ENGINE OIL

CONSUMPTION

Functions of engine oil

Engine oil has the primary function of lubricating and
cooling the inside of the engine, and plays a major role
in maintaining the engine in proper working order.

Engine oil consumption

It is normal that an engine should consume some
engine oil during normal engine operation. The
causes of oil consumption in a normal engine are as
follows.

 Oil is used to lubricate pistons, piston rings and

cylinders. A thin film of oil is left on the cylinder wall
when a piston moves downwards in the cylinder.
High negative pressure generated when the vehicle
is decelerating sucks some of this oil into the
combustion chamber. This oil as well as some part of
the oil film left on the cylinder wall is burned by the
high temperature combustion gases during the
combustion process.

 Oil is also used to lubricate the stems of the intake

valves. Some of this oil is sucked into the combustion
chamber together with the intake air and is burned
along with the fuel. High temperature exhaust gases
also burn the oil used to lubricate the exhaust valve
stems.

389

ENGINE

The amount of engine oil consumed depends on the
viscosity of the oil, the quality of the oil and the way
the vehicle is driven.

More oil is consumed under driving conditions such as
high speeds and frequent acceleration and
deceleration.

A new engine consumes more oil, since its pistons,
piston rings and cylinder walls have not become
conditioned.

When judging the amount of oil consumption, keep
in mind that the oil may have become diluted,
making it difficult to judge the true level accurately .

For example, if a vehicle is used for repeated short trips
and consumes a normal amount of oil, the dipstick may
not show any drop in the oil level at all, even after 1000
km (600 miles) or more. This is because the oil is
gradually becoming diluted with fuel or moisture, making
it appear that the oil level has not changed.

The diluting ingredients evaporate out when the vehicle
is then driven at high speeds, as on an expressway,
making it appear that oil is excessively consumed after
driving at high speeds.

Importance of engine oil level check

One of the most important points in proper vehicle
maintenance is to keep the engine oil at the optimum
level so that oil function will not be impaired. Therefore,
it is essential that the oil level be checked regularly.
Lexus recommends that the oil level be checked every
time you refuel the vehicle.

NOTICE

Failure to check the oil level regularly could lead
to serious engine trouble due to insufficient oil.

For detailed information on oil level check, see
”Checking the engine oil level” on page 392.

390