replace lexus LS400 1999 Electrical Components / LEXUS 1999 LS400 (OM50514U) User Guide

COMFORT ADJUSTMENT
142
Replace the belt assembly (including bolts) if it
has been used in a severe impact. The entire
assembly should be replaced even if damage is
not obvious.Front seat belt buckle illumination
16L020
Opening the driver's door lights up the driver's seat
belt buckle for easy use. The same applies for the
front passenger's door and seat belt buckle.
The light remains on for 15 seconds after the door is
closed, but goes off immediately when all doors are
locked.

COMFORT ADJUSTMENT
172
Do not use accessories for the seats which
cover the parts where the side airbags should
inflate. Such accessories may prevent the side
airbags from activating correctly, causing
death or serious injury.
 Do not modify or remove any wiring. Do not
modify, remove, strike or open any
components, such as the steering wheel pad,
steering wheel, column cover, front passenger
airbag cover, front seats, airbag sensor
assembly or seat belt assemblies. Doing any of
these may cause sudden SRS operation or
disable the system, which could result in death
or serious injury.
 Do not modify or replace the seats or surface of
the front seats with side airbags. Such
changes may disable the system or cause the
side airbags to inflate, resulting in death or
serious injury. Consult your Lexus dealer.
Failure to follow these instructions can result in
death or serious injuries.NOTICE
Do not perform any of the following changes without consulting your Lexus dealer. Suchchanges can interfere with proper operation of the
SRS in some cases.
Installation of electronic items such as a mobile two±way radio, cassette tape player orcompact disc player.
Modification of the suspension system.
Modification of the front end structure and sidestructure of the passenger compartment.
Attachment of a grille guard (bull bar, kangaroobar, etc.), snow plow, winches or any otherequipment to the front end.
Repairs made on or near the front fenders, front
end structure, console, steering column, steering wheel, dashboard near the frontpassenger airbag, front seats or seat belt
assembly.

AIR CONDITIONING AND AUDIO
228
CAUTION
Do not use the ºFRONT WINDSHIELDº button during
cooled air operation in extremely humid weather. The
difference between the temperature of the outside air
and that of the windshield could cause the outer surface
of the windshield to fog up blocking your vision.
When you turn the ignition switch on after the removal
and installation of the battery terminal, the indicator light
may flash and the operating sound of the motor may be
heard. This does not indicate a malfunction.
You may hear the operating sound of the motor about 70
seconds after the ignition switch is turned off. This is not
also a malfunction.(c) Air filter
The air filter may clog after long use and reduce air flow.
You can inspect the filter easily.
When you inspect and replace the air filter, be sure to
turn off the fan.
21L010
1. Open the glove box and remove the two covers.

AIR CONDITIONING AND AUDIO
229
21L011
2. Take out the air filter.
Inspect the lower surface of the filter. If it is just
moderately dusty, it may be cleaned by blowing
compressed air from the lower surface. Do not wash or
oil the filter.
If it is dirty, it should be replaced. To maintain the air
conditioning efficiency, replace the air filter according to
the maintenance schedule. (For scheduled
maintenance information, please refer to the separate
ºOwner's Manual Supplement/Maintenance
Scheduleº.)
NOTICE
Do not drive with the air filter removed, or the efficiency of air conditioning may be lost.

STARTING AND DRIVING
318This light comes on when the ignition key is turned
to the ºONº position. After about a few seconds, the
light will go off.
If either of the following conditions occurs, this indicates
a malfunction somewhere in the parts monitored by the
warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.

The light does not come on as described above, or
remains on.
 The light comes on while driving.
Even if the anti±lock brake system should fail, the brake
system will still operate conventionally. But when the
ºABSº warning light is on (and the brake system warning
light is off), anti±lock brake system is not assisting brake
performance so that the wheels could lock up during a
sudden brake or braking on slippery road surfaces.
Have your vehicle checked by your Lexus dealer as
soon as possible.
Drum±in±disc type parking brake system
Your vehicle has a drum±in±disc type parking brake
system. This type of brake system needs
bedding±down of the brake shoes periodically or
whenever the parking brake shoes and/or drums are
replaced.
Have your Lexus dealer perform the bedding±down.

STARTING AND DRIVING
319
Brake pad wear limit warning message
31L082
When your brake pads are worn enough to require
replacement, the brake pad wear warning message
in the multi information display appears.
If the warning message in the multi information display
appears while driving, have the brake pads checked and
replaced by your nearest Lexus dealer immediately.
Continuous driving without replacing the brake pads will
cause expensive rotor damage and increasing brake
pedal effort to get the same stopping distance.TYPES OF TIRES
Determine what kind of tires your vehicle is originally
equipped with.

STARTING AND DRIVING
320
1. Summer tires
Summer tires are high±speed capability tires best suited
to highway driving under dry conditions.
Since summer tires do not have the same traction
performance as snow tires, summer tires are
inadequate for driving on snow±covered or icy roads.
For driving on snow±covered or icy roads, we
recommend using snow tires. If installing snow tires, be
sure to replace all four tires.
2. All season tires
All season tires are designed to provide better traction
in snow and to be adequate for driving in most winter
conditions, as well as for use all year round.
All season tires, however, do not have adequate traction
performance compared with snow tires in heavy or loose
snow. A lso, all season tires fall short in acceleration and
handling performance compared with summer tires in
highway driving.

IN CASE OF AN EMERGENCY
347
CAUTION
When making the connections, to avoid serious injury,
do not lean over the battery or accidentally let the
jumper cables or clamps touch anything except the
correct battery terminals or the ground.
5. Start your engine in the normal way. After starting,
run it at about 2000 rpm for several minutes with the
accelerator pedal lightly depressed.
6. Carefully disconnect the cables in the exact reverse
order: the negative cable and then the positive cable.
7. Carefully dispose of the battery cover cloths which
may now contain sulfuric acid.
8. If removed, replace all the battery vent plugs.
If the cause of your battery discharging is not apparent
(for example, lights left on), you should have it checked.IF YOUR VEHICLE OVERHEATS
If your engine coolant temperature gauge indicates
overheating, if you experience a loss of power, or if
you hear a loud knocking or pinging noise, the
engine has probably overheated.

IN CASE OF AN EMERGENCY
365
11. After changing the wheel, check the air pressure
of the replaced tire. Stow all the tools, jack and flat
tire securely.
If the pressure of the replaced tire is low, drive slowly to
the nearest service station and fill to the correct
pressure.
Do not forget to reinstall the tire valve cap as dirt and
moisture could get into the valve core and possible
cause air leakage. If the cap is missing, put a new one
on as soon as possible.
This is the same procedure for changing or rotating your
tires.
CAUTION
Before driving, make sure all the tools, jack and flat tire
are securely in place in their storage location to reduce
the possibility of personal injury during a collision or
sudden braking.

IN CASE OF AN EMERGENCY
377
IF YOU LOSE YOUR KEYS ORLOCK YOURSELF OUT
Many Lexus dealers can make a new key if you can
give them the key number. Since your vehicle is
equipped with the engine immobiliser system, the
dealer will also need your master key.
See the suggestion given in ºKeysº on page 9.
If your keys are locked in the vehicle and you cannot get
a duplicate, many Lexus dealers can still open the door
for you, using their special tools. If you must break a
window to get in, we suggest breaking the smallest side
window because it is the least expensive to replace. Be
extremely cautious to avoid cuts from the glass.
Even if you lose only one key, contact your Lexus dealer
to make a new key. If you lose all your master keys, you
cannot make new keys; the whole system must be
replaced.