1999 Lexus LS400 ESP

MAINTENANCE
379
MAINTENANCE
REQUIREMENTS
Your Lexus vehicle has been designed to have fewer
maintenance requirements with longer service intervals
to save both your time and money. However, each
regular maintenance as well as day±to±day care is more
important than ever before to ensure smooth,
trouble±free, safe, and economical driving.
It is the owner's responsibility to make sure the specified
maintenance, including general maintenance services,
is performed. Note that both the new vehicle and
emission control system warranties specify that proper
maintenance and care must be performed. See the
Owner's Guide, Owner's Manual Supplement or
Warranty Booklet for complete warranty information.
General maintenance
General maintenance items are those day±to±day care
practices that are important to your vehicle for proper
operation. It is the owner's responsibility to ensure that
the general maintenance items are performed regularly.
These checks or inspections can be done either by
yourself or your Lexus dealer.
Scheduled maintenance
The scheduled maintenance items listed in the ºOwner's
Manual Supplement/Maintenance Scheduleº are those
required to be serviced at regular intervals.
For details of your maintenance schedule, read the
separate ºOwner's Manual Supplement/Maintenance
Scheduleº.
It is recommended that any replacement parts used
for maintenance or for the repair of the emission
control system be Lexus supplied.
The owner may elect to use non±Lexus supplied
parts for replacement purposes without invalidating
the emission control system warranty. However,
use of replacement parts which are not of equivalent
quality may impair the effectiveness of the emission
control systems.
You may also elect to have maintenance,
replacement, or repair of the emission control
devices and system performed by any automotive
repair establishment or individual without
invalidating this warranty. See Owner's Guide,
Owner's Manual Supplement or Warranty Booklet
for complete warranty information.
Where to go for service?
Lexus technicians are well±trained specialists and are
kept up to date with the latest service information

INTRODUCTION
390
DO±IT±YOURSELF SERVICEPRECAUTIONS
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 ºParts and toolsº.
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:

CHASSIS
428Warning: 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.
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.

BODY
471
PROTECTING YOUR VEHICLEFROM 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.

BODY
474Aluminum 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.

BODY
477


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 neutraldetergent, apply a cleaner that does notcontain an organic solvent.

Never use organic substances such asbenzine, 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 alwaysclean.

Long exposure to direct sunlight may causethe leather surface to harden and shrink. Keepyour vehicle in a shaded area, especially in thesummer.

The interior of your vehicle is apt to heat up onhot summer days, so avoid placing on theupholstery items made of vinyl or plastic orcontaining 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 windowcleaner 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. To shampoo the carpets, use a sponge or brush