air conditioning Lexus GX470 2003 Electrical Components / LEXUS 2003 GX470 OWNER'S MANUAL (OM60A45U)

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

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
viiiPage
1Driving position memory switches
171
. . . . . . . . . . .
2Power window switches 33
. . . . . . . . . . . . . . . . . . . . . . .
3Power door lock switch 20
. . . . . . . . . . . . . . . . . . . . . . .
4Window lock switch 34
. . . . . . . . . . . . . . . . . . . . . . . . . . .
5Power rear view mirror control switches 116 . . . . . . .
6Side vents 189
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7Headlight, turn signal and fog light switches 24 . . . .
8Wiper and washer switch 27
. . . . . . . . . . . . . . . . . . . . . .
9Center vents 189
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10Emergency flasher switch 36
. . . . . . . . . . . . . . . . . . . . .
11Car audio 195
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12Multiinformation display 53
. . . . . . . . . . . . . . . . . . . . . .
13Automatic air conditioning controls 179
. . . . . . . . . .
14Rear window defogger switch 31
. . . . . . . . . . . . . . . . . .
15Front passenger’s seat belt reminder light 46 . . . . . .
16Glove box 70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17Ashtray 66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. .
18Cigarette lighter 66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19Seat heater switches 37
. . . . . . . . . . . . . . . . . . . . . . . . . . Page
20Fourwheel drive control lever
309
. . . . . . . . . . . . . . .
21Automatic transmission selector lever 303 . . . . . . . .
22Parking brake lever 301
. . . . . . . . . . . . . . . . . . . . . . . . .
23Center differential lock switch 309
. . . . . . . . . . . . . . .
24Power outlet (12 VDC) 68
. . . . . . . . . . . . . . . . . . . . . . . . .
25Downhill assist control switch 326
. . . . . . . . . . . . . . .
26Electronic modulated suspension
control switch 320 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27Rear height control air suspension
switches 315. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28Ignition switch 300
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29“2nd STRT” switch 309
. . . . . . . . . . . . . . . . . . . . . . . . . .
30Cruise control switch 312
. . . . . . . . . . . . . . . . . . . . . . .
31Steering pad switches 214
. . . . . . . . . . . . . . . . . . . . . . .
32Hood lock release lever 83
. . . . . . . . . . . . . . . . . . . . . . .
33Fuel filler door opener 84
. . . . . . . . . . . . . . . . . . . . . . . . .
34Instrument panel light control dial 60
. . . . . . . . . . . . . .
35Outside rear view mirror defogger switch 32 . . . . . . .
36Power outlet (115 VAC) main switch 68
. . . . . . . . . . . .

Finish
GAUGES, METERS AND SERVICE REMINDER INDICATORS
41
ENGINE COOLANT
TEMPERATURE GAUGE
 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. It is not a malfunction even if the needle of the engine coolant
temperature gauge returns to “C” when the ignition switch is
turned to the “START”.
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 the temperature of the engine within the
specified operating range.
 Do not continue driving with an overheated engine.
See “If your vehicle overheats” on page 364.

Finish
GAUGES, METERS AND SERVICE REMINDER INDICATORS
50
(j) “VSC TRAC” Warning Light
The light warns that there is a problem somewhere in the
following.
Vehicle skid control system
 Active traction control system
 Downhill assist control system
 Hill− start assist control system
The light will come on when the ignition key turned to “ON”, and
will go off after a few seconds.
It is not a malfunction that the warning light may stay on for 60
seconds after the ignition key is turned to the “ON” position.
Depressing the brake pedal repeatedly may turn on the lights.
It is normal if they go out after a few seconds.
There is no problem when the “VSC TRAC” warning light
comes on when the brake actuator temperature becomes high.
If the light comes on while driving, the above mentioned
systems do not work. However, as conventional braking
operates when applied, there is no problem to continue your
driving.
In the following cases, contact your Lexus dealer:
 The warning light does not come on after the ignition key is
turned to “ON”.
 The warning light remains on after the ignition key is turned
to “ON”.
 The warning light comes on while driving.
(k) 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.
(l) Low Engine Oil Pressure Warning Light
This light warns that the engine oil pressure is too low.
If it flickers or stays on while you are driving, pull off the road
to a safe place and stop the engine immediately. Call a Lexus
dealer or qualified repair shop for assistance.

SECTION 2 – 1
178
AIR CONDITIONING AND AUDIO
Air conditioning
Automatic air conditioning controls179
. . . . . . . . . . . . . . . . . . . . . . . . .
Rear cooler controls 192
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
For vehicles equipped with Navigation System,
please refer to the separate “Navigation System
Owner’s Manual”.

AIR CONDITIONING
179
AUTOMATIC AIR CONDITIONING CONTROLS
21PY023
 You can adjust the brightness of the display. See “Instrument panel light control” on page 60 for details.

AIR CONDITIONING
180The automatic air conditioning automatically maintains
the set temperature.
In the automatic operation mode, the air conditioning selects
the most suitable fan speed, air flow, air intake and on−
off the
air conditioning according to the temperature.
The ignition key must be in the “ON” position.
NOTICE
To prevent the battery from being discharged, do not
leave the air conditioning on longer than necessary
when the engine is not running.
1“AUTO” button
2“OFF” button
3Driver side temperature display (in degrees
Fahrenheit or Centigrade)
4Fan speed display
5Air flow display
6Passenger side temperature display (in degrees
Fahrenheit or Centigrade)
7Windshield air flow button
8“PASSENGER TEMP” (passenger side temperature
control) button
9“DUAL” (temperature setting mode change) button
10“A/C” button
11“MODE”(air flow control) button
12Fan speed control button
13Air intake control button
14“TEMP” (driver side temperature control) button

AIR CONDITIONING
181
21PY024
 Air flow selection

AIR CONDITIONING
182
(a) Climate control
SETTING OPERATION automatic control
1. Push the “AUTO” button.
An indicator light will illuminate to show that the automatic
operation mode has been selected.
Air flow quantity, switching of the diffusers, on−off of the air
conditioning and switching of the air intake between
RECIRCULATED AIR and OUTSIDE AIR are automatically
adjusted. The operation status is shown by each indicator.
When one of the manual control buttons is depressed while
operating in automatic mode, the operation corresponding to
the button depressed is set. Other conditions continue to be
adjusted automatically.
Push the “OFF” button to turn the air conditioning system off.
2. Use the “TEMP” or “PASSENGER TEMP” button to set
the desired temperature.
The “TEMP” or “PASSENGER TEMP” button is used to set the
desired temperature. The temperature will be controlled on the
driver and passenger sides simultaneously or individually.
“TEMP” button Changes the temperature on the driver and
passenger sides simultaneously or the driver side only.
“PASSENGER TEMP” button Changes the temperature
settings separate from driver side.
“DUAL” button Changes the mode of the temperature
setting.
The indicator on the “DUAL” button has two modes:
 With the indicator on For individual temperature setting
 With the indicator off For simultaneous temperature
setting

AIR CONDITIONING
183
21PY027
Driver side setting
Passenger side setting
Mixed settingSETTING OPERATION manual control
When one of the manual control buttons is depressed
while operating in automatic mode, the mode relevant to
the depressed button is set. Other conditions continue to
be adjusted automatically.
If manual air flow selection is desired
The outlets from which air is delivered can be selected
manually by
pushing the button. The function of each mode is
as follows:
1Panel − Air flows mainly from the instrument panel vents.
2Bilevel − Air flows from both the floor vents and the
instrument panel vents.
3Floor − Air flows mainly from the floor vents.
4Floor/Windshield − Air flows mainly from the floor vents
and windshield vents.