2003 TOYOTA TUNDRA air conditioning

’03 TUNDRA_U (L/O 0307)
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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
1 OPERATION OF INSTRUMENTS AND CONTROLSPage
1 Overview of instru ments and controls
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2 Keys and DoorsNO TAG
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3 Seats, Seat belts, Steering wheel and MirrorsNO TAG
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4 Lights and WipersNO TAG
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5 Gauges, Meters and Service reminder indicatorsNO TAG
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6 Ignition switch, Transmission and Parking brakeNO TAG
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7 Car audio systemNO TAG
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8 Air conditioning systemNO TAG
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9 Other equipmentNO TAG
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2 INFORMATION BEFORE DRIVING YOUR TOYOTA NO TAG . . . . .
3 STARTING AND DRIVING NO TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 IN CASE OF AN EMERGENCY NO TAG . . . . . . . . . . . . . . . . . . . . . . . . .
5 CORROSION PREVENTION AND APPE ARANCE CARE NO TAG
6 VEHICLE MAINTENANCE AND CARE NO TAG . . . . . . . . . . . . . . . . . .
7 DOITYOURSELF MAINTENANCE
1 IntroductionNO TAG
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2 Engine and ChassisNO TAG
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3 Electrical componentsNO TAG
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8 SPECIFICATIONS NO TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
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9 REPORTING SAFETY DEFECTS FOR U.S. OWNERS AND CAMPER INFORMATION NO TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 0 INDE X NO TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
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Table of contents

’03 TUNDRA_U (L/O 0307)
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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
1. Outside rear view mirror heater switch
2. Clutch start cancel switch or power
rear window switch
3. Headlight, turn signal and front fog light switches
4. Ignition switch
5. Wiper and washer switches
6. Cargo lamp switch
7. Emergency flasher switch
8. Car audio
9. Air conditioning controls
10. Front passenger ’s seat belt reminder light/passenger airbag off indicator
11. Passenger airbag manual on −off switch
12. Clock
13. “4LO” button (transfer mode selector button)
14. Cup holder
15. Power outlets
16. Ashtray
17. Cigarette lighter
18. “2WD/4HI” button (transfer mode selector button)

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
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 moves into the red zone,
your engine is too hot. If your vehicle
overheats, 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 con-
trol 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 ve-
hicle overheats” in Section 4.
IdlingNormal
driving
The oil pressure gauge indicates engine
oil pressure when the ignition switch is
on. Check it while driving to make sure
that the needle is in the proper range.
If the oil pressure should stay below the
normal range, pull off the road to a safe
place and stop the engine immediately.
Call a Toyota dealer or qualified repair
shop for assistance.
Oil pressure may not build up when the
oil level is too low. The oil pressure
gauge is not designed to indicate oil level,
and the oil level must be checked using
the level dipstick.
Oil pressure gauge

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
(a) Brake System Warning Light
This light comes on in the following cases
when the ignition key is in the “ON” posi-
tion.
When the parking brake is applied...
When the brake fluid level is low...
CAUTION
It is dangerous to continue driving
normally when the brake fluid level is
low.
Have your vehicle checked at your
Toyota dealer in the following case:
The light does not come on even if the
parking brake is applied when the igni-
tion key is in the “ON” position.
CAUTION
If the light does not turn off even
after the parking brake is released
while the engine is running, immedi-
ately stop your vehicle at a safe
place and contact your Toyota dealer.
In this case, the brakes may not work
properly and your stopping distance
will become longer. Depress the brake
pedal firmly and bring the vehicle to
an immediate stop.
(b) Driver’s Seat Belt Reminder Light
and Buzzer
This light and buzzer remind you to
buckle up the driver’s seat belt.
Once the ignition key is turned to “ON” or
“START”, the reminder light flashes and
buzzer sounds if the driver ’s seat belt is
not fastened. Unless the driver fastens the
belt, the light keeps flashing and the
buzzer stops after about 4 to 8 seconds. (c) Front Passenger ’s Seat Belt Re-
minder Light
This light reminds you to buckle up the
front passenger ’s seat belt.
Once the ignition key is turned to “ON” or
“START”, the reminder light flashes if a
passenger sits in the front passenger seat
and does not fasten the seat belt. Howev-
er, if a front passenger uses an additional
seat cushion, the light may not flash even
when the seat belt is not buckled up.
If luggage or other 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 keep flashing.
(d) Discharge Warning Light
This light warns that the battery is being
discharged.
If it comes on while you are driving, there
is a problem somewhere in the charging
system.
The engine ignition will continue to oper-
ate, however, until the battery is dis-
charged. Turn off the air conditioning,
blower, radio, etc., and drive directly to
the nearest Toyota dealer or repair shop.

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
AM
Fading—AM broadcasts are reflected by
the upper atmosphere—especially at night.
These reflected signals can interfere with
those received directly from the radio sta-
tion, causing the radio station to sound
alternately strong and weak.
Station interference—When a reflected sig-
nal and a signal received directly from a
radio station are very nearly the same
frequency, they can interfere with each
other, making it difficult to hear the broad-
cast.
Static—AM is easily affected by external
sources of electrical noise, such as high
tension power lines, lightening, or electri-
cal motors. This results in static.
CARING FOR YOUR CASSETTE PLAYER
AND TAPES
For the best performance for your cas-
sette player and tapes:
Clean the tape head and other parts regu-
larly.
A dirty tape head or tape path can
decrease sound quality and tangle your
cassette tapes. The easiest way to
clean them is by using a cleaning tape.
(A wet type is recommended.) Use high
−quality cassettes.
Low −quality cassette tapes can cause
many problems, including poor sound,
inconsistent playing speed, and
constant auto− reversing. They can also
get stuck or tangled in the cassette
player.
Do not use a cassette if it has been
damaged or tangled or if its label is
peeling off.
Do not leave a cassette in the player
if you are not listening to it, especially
if it is hot outside.
Store cassettes in their cases and out
of direct sunlight.
Avoid using cassettes with a total play-
ing time longer than 100 minutes (50
minutes per side). The tape used in
these cassettes is thin and could get
stuck or tangled in the cassette player. CARING FOR YOUR COMPACT DISC
PLAYER AND DISCS
Type 2 and 3—Your compact disc play-
er is intended for use with 12 cm (4.7
in.) discs only.
Extremely high temperatures can keep
your compact disc player from working.
On hot days, use the air conditioning
to cool the vehicle interior before you
listen to a disc.
Bumpy roads or other vibrations may
cause your compact disc player to
skip.
If moisture gets into your compact disc
player, you may not hear any sound
even though your compact disc player
appears to be working. Remove the
disc from the player and wait until it
dries.
CAUTION
Compact disc players use an invisible
laser beam which could cause hazard-
ous radiation exposure if directed
outside the unit. Be sure to operate
the player correctly.

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
OPERATION OF INSTRUMENTS AND
CONTROLS
Air conditioning system
Controls 158
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Air flow selector settings 161
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Operating tips 161
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Instrument panel vents 163
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SECTION 1 8

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
5. Windshield—Air flows mainly from the
windshield vents.
Turning the air flow selector to the
windshield position turns on the defog-
ging function with the purpose of clear-
ing the front view.
This position allows the air intake to
select FRESH automatically. This is to
clean up the front view more quickly.
It is recommended that you close the
lower vent. For details about this, see
“Instrument panel vents” in this section.
Vehicles with “A/C” button—
Press the “A/C” button for dehumidified
heating or cooling. This setting clears
the front view more quickly.
For details about air flow selector settings,
see “Air flow selector settings” described
below. Air intake selector
The air intake selector button is used to
switch the air intake
FRESH mode that
draws outside air into the system and
RECIRCULATED mode that recirculates
the air inside vehicle.
To turn the air source to RECIRCULATED
mode, press the button. The indicator will
come on. To turn the air source to FRESH
mode, press the button again. The indica-
tor will go off.
To prevent fogging up of the windshield,
the air intake mode may change automati-
cally to FRESH depending on the condi-
tion of the air conditioning system.
“A/C” button
To turn on the air conditioning, press the
“A/C” button. The “A/C” button indicator
will come on. To turn the air conditioning
off, press the button again.
Vehicles with 2UZ −FE engine—If the “A/C”
button indicator flashes, there is a prob-
lem in the air conditioning system and the
air conditioning automatically shuts off. If
this happens, take your vehicle to a
Toyota dealer for service.

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2003 TUNDRA from Jul. ’03 Prod. (OM 34430U)
To cool off your Toyota after it has
been parked in the hot sun, drive with
the windows open for a few minutes.
This vents the hot air, allowing the air
conditioning to cool the interior more
quickly.
Make sure the air intake grilles in front
of the windshield are not blocked (by
leaves or snow, for example).
On humid days, do not blow cold air
on the windshield. The windshield could
fog up because of the difference in air
temperature on the inside and outside
of the windshield.
Keep the area under the front seats
clear to allow air to circulate through-
out the vehicle.
On cold days, set the fan speed to
high for a minute to help clear the
intake ducts of snow or moisture. This
can reduce the amount of fogging on
the windows.
When driving on dusty roads, close all
windows. If dust thrown up by the ve-
hicle is still drawn into the vehicle after
closing the windows, it is recommended
that the air intake selector be set to
FRESH and the fan speed selector to
any setting except “OFF”.
Air flow selector settings
: See “Instrument panel vents” in this section.∗: On some models
Operating tips