1999 Lexus LS400 air condition

HOW TO USE THIS MANUAL
v
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 occurs, 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.
INDEX
The page number is listed for each item in the Owner's
Manual so that you can rapidly find the item and page
you are searching for.
GAS STATION INFORMATION
The information you need to know for appropriate
servicing at the gas station is provided here.
QUICK INDEX
This is designed so that you can quickly find the needed
information when an urgent situation arises.
Safety symbol

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
ix
Page
1 Door lock switch and power windowswitches 32, 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Driving position memory switch 203
. . . . . . . . .
3 Shoulder anchor control switch 147
. . . . . . . . .
4 Power rear view mirror control switch 134 . . .
5 Parking brake release lever 279
. . . . . . . . . . . . .
6 Fuel filler door opener 110
. . . . . . . . . . . . . . . . . .
7 Trunk lid opener 109
. . . . . . . . . . . . . . . . . . . . . . .
8 Parking brake 279
. . . . . . . . . . . . . . . . . . . . . . . . .
9 Headlight, turn signal and fog
light switch 35, 38, 41 . . . . . . . . . . . . . . . . . . . . . .
10 Windshield wiper and washer switch 41 . . . . .
11 Multi information control switch 70
. . . . . . . . . .
12 Cruise control switch 297
. . . . . . . . . . . . . . . . . . Page
13 Outside temperature display
88
. . . . . . . . . . . . .
14 Clock 87
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15 Emergency flasher switch 52
. . . . . . . . . . . . . . .
16 Automatic air conditioning controls 215 . . . . .
17 Car audio 233
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 Vehicle skid control system off switch 304 . . .
19 Headlight cleaner switch 44
. . . . . . . . . . . . . . . .
20 Seat heater switches 53
. . . . . . . . . . . . . . . . . . . .
21 Ashtray 89
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Height control switch 301
. . . . . . . . . . . . . . . . . .
23 Driving pattern selector switch 281
. . . . . . . . . .
24 Automatic transmission selector lever 281 . . .
25 CD automatic changer 254
. . . . . . . . . . . . . . . . . .
26 Glove box 92
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
59
ENGINE COOLANT
TEMPERATURE GAUGE
13L002±2

Normal range
The gauge indicates the engine coolant temperature
when the ignition switch is on. The engine operating
temperature will vary with changes in weather and
engine load.
If the needle points to the red zone or higher, stop your
vehicle and allow the engine to cool.
Your vehicle may overheat during severe operating
conditions, such as:
 Driving up a long hill on a hot day.
 Reducing speed or stopping after high speed driving.
 Idling for a long period with the air conditioning on in stop±and±go traffic.
 Towing a trailer.
NOTICE
Do not remove the thermostat in the engine
cooling system as this may cause the engine to
overheat. The thermostat is designed to control the flow of coolant to keep thetemperature of the engine within the specifiedoperating range.
Do not continue driving with an overheatedengine. See ºIf your vehicle overheatsº onpage 347.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
66If the brake fluid level is correct ...
Have
the warning system checked by your Lexus dealer.
(b) Driver's Seat Belt Reminder Light
and Buzzer
Once the ignition key is turned to ºONº or ºSTARTº, the
reminder light flashes and buzzer sounds if the driver's
seat belt is not fastened. Unless the driver fastens the
belt, the light stays flashing and the buzzer stops after
about 4 to 8 seconds.
(c) Front Passenger's Seat BeltReminder Light
Once the ignition key is turned to ºONº or ºSTARTº, the
reminder light flashes if a passenger sits in the front
passenger seat and does not fasten the seat belt.
Unless the front passenger fastens the belt, the light
stays flashing.
If luggage load is placed on the front passenger seat,
depending on its weight and how it is placed on the seat,
built±in sensors in the seat cushion may detect the
pressure, causing the reminder light to come on.
(d) SRS Warning Light
The indicators come on when the ignition key is
turned to the ºACCº or ºONº position. It goes off
after about 6 seconds. This means the SRS is
operating properly.
The SRS warning light system monitors the airbag
sensor assemblies, inflators, seat belt pretensioners,
warning light, interconnecting wiring and power sources.
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.
 The light stays on or flashes.
 The light comes on or starts flashing while driving.
If the light stays on, it indicates that the driver and front
passenger airbags fail. If the light flashes, the side
airbags and/or seat belt pretensioners fail.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
67
(e) Discharge Warning Light
This light warns that the battery is being discharged.
If it comes on while you are driving, stop the vehicle, turn
off the engine, and check for the cause. Look first at the
engine drive belt.
If it is loose or broken, the generator will not charge
the battery properly.
 If the belt is O.K., there is a problem somewhere in the
charging system.
The engine ignition will continue to operate, however,
until the battery is discharged. Turn off the air
conditioning, blower, radio, etc., and drive directly to the
nearest Lexus dealer or repair shop.
NOTICE
Do not continue driving if the engine drive belt is broken or loose.
(f) Malfunction Indicator Lamp
This lamp comes on in the following cases.
a. The fuel tank is completely empty. (See ºFuel gaugeº
on page 57 for instructions.)
b. The fuel tank cap is not tightened securely. (See
ºFuel tank capº on page 110 for instructions.)
c. There is a problem somewhere in your engine
electrical system, automatic transmission electrical
system or electronic throttle control system.
If it comes on while you are driving in case ªc.º, have your
vehicle checked/repaired by your Lexus dealer as soon
as possible.
(g) ºABSº Warning Light
This light warns that there is a problem somewhere in
your anti±lock brake system.
If the light comes on while you are driving, have your
vehicle checked by your Lexus dealer as soon as
possible.
The light will come on when the ignition key is turned to
ºONº, and will go off after about a few seconds.
When the ºABSº warning light is on (and the brake
system warning light is off), the brake system operates
conventionally but anti±lock brake system is not
assisting brake performance so that the wheels could
lock up during a sudden brake or braking on slippery

COMFORT ADJUSTMENT
173
16L136-2
This SRS has an indicator to inform the driver of
operating problems. If either of the following conditions
occurs, this indicates a malfunction of the airbags and/or
seat belt pretensioners. Even if the seat belt
pretensioners should fail, the seat belts will operate
conventionally. Contact your Lexus dealer as soon as
possible to service the vehicle.
 The light does not come on as described above.
 The light stays on or flashes.
 The light comes on or starts flashing while driving.
If the light stays on, it indicates that the driver and front
passenger airbags fail. If the light flashes, the side
airbags and/or seat belt pretensioners fail.

SECTION 2
214
AIR CONDITIONING AND AUDIO
Automatic air conditioning controls215
. . . . . . . . . . . . . .
Audio system 233
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For vehicles equipped with Navigation
System, please refer to the separateºOwner's Manual for Navigation Systemº.

AIR CONDITIONING AND AUDIO
215
AUTOMATIC AIR CONDITIONING CONTROLS
21L001a

The automatic air conditioning automatically
maintains the set temperature.
This air conditioning features automatic fan speed
and air flow control which automatically selects the
most suitable fan speed and air flow to control the
temperature. The ignition key must be in the ºONº
position.NOTICE
To prevent the battery from being discharged, do not leave the air conditioning on longer thannecessary when the engine is not running.