2004 Hyundai Sonata air condition

1- 98 FEATURES OF YOUR HYUNDAI
H290F02O-GAT1. CD Select Button
o Insert the CD with the label facing upward.
o Insert the CD to start CD playback, during
radio operation or cassette tape playing.
o When a disc is in the CD deck, if you press
the play button the CD player will begin
playing even if the radio or cassette player
is being used.
o The CD player can be used when the ignition
switch is in either the "ON" or "ACC" position.
2. FF/REW ( / )
If you want to fast forward or reverse through
the compact disc track, push and hold in the FF
( ) or REW ( ) button.
When you release the button, the compact disc
player will resume playing.
3. TRACK UP/DOWN
o The desired track on the disc currently being
played can be selected using the track
number.
o Press button once to skip forward to the
beginning of the next track. Press button
once to skip back to the beginning of the
track.
4. REPEAT
o To repeat the music you are listening to,
press the RPT button. To cancel , press
again.
o If you do not release RPT operation when the
track ends, it will automatically be replayed.
This process will be continued until you push
the button again.
5. EQUALIZER Button
Press the EQ button to select the CLASSIC,
JAZZ, ROCK and DEFEAT MODE for the
desired tone quality. Each press of the button
changes the display as follows;
NOTE:o To assure proper operation of the unit,
keep the vehicle interior temperature
within a normal range by using the
vehicle's air conditioning or heating
system.
o When replacing the fuse, replace it with
a fuse having the correct capacity.
o The preset station frequencies are all
erased when the car battery is discon-
nected. Therefore, all data will have to be
set again if this should occur.
o Do not add any oil to the rotating parts.
Keep magnets, screwdrivers and other
metallic objects away from the tape
mechanism and head.
o This equipment is designed to be used
only in a 12 volt DC battery system with
negative ground.
o This unit is made of precision parts. Do
not attempt to disassemble or adjust
any parts.
o When driving your vehicle, be sure to
keep the volume of the unit set low
enough to allow you to hear sounds
coming from the outside.
o Do not expose this equipment (includ-
ing the speakers and tape) to water or
excessive moisture.
6. CD EJECT Button
When the button is pressed with the CD
loaded, the CD is ejected.
7. SCAN Button (If installed)
o Press the SCAN button to playback the first
10 seconds of each track.
o Press the SCAN button again within 10 sec.
for the desired track. CLASSIC → JAZZ → ROCK → DEFEAT
↑

DRIVING YOUR HYUNDAI 2- 13
first or reverse gear (manual transaxle) and
block the rear wheels so the car cannot roll.
Then release the parking brake.
o Do not hold the vehicle on the upgrade with
the accelerator pedal. This can cause the
transaxle to overheat. Always use the brake
pedal or parking brake.
C140A01A-AATDRIVING FOR ECONOMY
You can save fuel and get more miles from your
car if you follow these suggestions:
o Drive smoothly. Accelerate at a moderate
rate. Don't make "jack-rabbit" starts or full-
throttle shifts and maintain a steady cruising
speed. Don't race between stoplights. Try to
adjust your speed to that of the other traffic
so you don't have to change speeds unnec-
essarily. Avoid heavy traffic whenever pos-
sible. Always maintain a safe distance from
other vehicles so you can avoid unneces-
sary braking. This also reduces brake wear.
o Drive at a moderate speed. The faster you
drive, the more fuel your car uses. Driving at
a moderate speed, especially on the high-
way, is one of the most effective ways to
reduce fuel consumption.
o Don't "ride" the brake or clutch pedal. This
can increase fuel consumption and also
increase wear on these components. In
addition, driving with your foot resting on the
brake pedal may cause the brakes to over-heat, which reduces their effectiveness and
may lead to more serious consequences.
o Take care of your tires. Keep them inflated
to the recommended pressure. Incorrect
inflation, either too much or too little, results
in unnecessary tire wear. Check the tire
pressures at least once a month.
o Be sure that the wheels are aligned cor-
rectly. Improper alignment can result from
hitting curbs or driving too fast over irregular
surfaces. Poor alignment causes faster tire
wear and may also result in other problems
as well as greater fuel consumption.
o Keep your car in good condition. For better
fuel economy and reduced maintenance
costs, maintain your car in accordance with
the maintenance schedule in Section 5. If
you drive your car in severe conditions,
more frequent maintenance is required (see
Section 5 for details).
o Keep your car clean. For maximum service,
your Hyundai should be kept clean and free
of corrosive materials. It is especially impor-
tant that mud, dirt, ice, etc. not be allowed to
accumulate on the underside of the car. This
extra weight can result in increased fuel
consumption and also contribute to corro-
sion.
o Travel lightly. Don't carry unnecessary
weight in your car. Weight reduces fuel
economy.
o Don't let the engine idle longer than neces-
sary. If you are waiting (and not in traffic),
turn off your engine and restart only when
you're ready to go.o Remember, your Hyundai does not require
extended warm-up. As soon as the engine
is running smoothly, you can drive away. In
very cold weather, however, give your en-
gine a slightly longer warm-up period.
o Don't "lug" or "over-rev" the engine. Lugging
is driving too slowly in too high a gear result-
ing in the engine bucking. If this happens,
shift to a lower gear. Over-revving is racing
the engine beyond its safe limit. This can be
avoided by shifting at the recommended
speeds.
o Use your air conditioning sparingly. The air
conditioning system is operated by engine
power so your fuel economy is reduced
when you use it.
C160A01A-AATWINTER DRIVING
The more severe weather conditions of winter
result in greater wear and other problems. To
minimize the problems of winter driving, you
should follow these suggestions:
C150A01A-AAT
SMOOTH CORNERING
Avoid braking or gear changing in corners,
especially when roads are wet. Ideally, corners
should always be taken under gentle accelera-
tion. If you follow these suggestions, tire wear
will be held to a minimum.

2- 18 DRIVING YOUR HYUNDAI
CAUTION:If overheating should occur when towing,
(the temperature gauge reads near red zone),
taking the following action may reduce or
eliminate the problem.
1. Turn off the air conditioner.
2. Reduce highway speed.
3. Select a lower gear when going uphill.
4. While in stop and go traffic, place the
gear selector in park or neutral and idle
the engine at a higher speed.
!
C190F01S-AATTrailer or Vehicle Towing Tips
1. Before towing, check hitch and safety chain
connections as well as proper operation of
the trailer running lights, brake lights, and
turn signals.
2. Always drive your vehicle at a moderate
speed (Less than 60 mph)
3. Trailer towing requires more fuel than normal
conditions.
4. To maintain engine braking efficiency and
electrical charging performance, do not use
fifth gear (manual transaxle) or overdrive
(automatic transaxle).
5. Always secure items in the trailer to prevent
load shift while driving.
6. Check the condition and air pressure of all
tires on the trailer and your car. Low tire
pressure can seriously affect the handling.
Also check the spare tire.
7. The vehicle/trailer combination is more af-
fected by crosswind and buffeting.
When being passed by a large vehicle, keep
a constant speed and steer straight ahead.
If there is too much wind buffeting slow down
to get out of the other vehicle's air turbulence.
8. When parking your car and trailer, especially
on a hill, be sure to follow all the normal
precautions. Turn your front wheel into the
curb, set the parking brake firmly, and put the
transaxle in 1st or Reverse (manual) or Park
(automatic). In addition, place wheel chocks
at each of the trailer's tires.9. If the trailer has electric brakes, start your
vehicle and trailer moving, and then apply the
trailer brake controller by hand to be sure the
brakes are working. This lets you check
your electrical connection at the same time.
10.During your trip, check occasionally to be
sure that the load is secure, and that the
lights and any trailer brakes are still working.
11.Avoid jerky starts, sudden acceleration or
sudden stops.
12.Avoid sharp turns and rapid lane changes.
13.Avoid holding the brake pedal down too long
or too frequently. This could cause the brakes
to overheat, resulting in reduced braking
efficiency.
14.When going down a hill, shift into a lower gear
and use the engine braking effect.
When ascending a long grade, downshift the
transaxle to a lower gear and reduce speed
to reduce chances of engine overloading
and/or overheating.
15.If you have to stop while going uphill, do not
hold the vehicle in place by pressing on the
accelerator. This can cause the automatic
transaxle to overheat. Use the parking brake
or footbrake.
NOTE:When towing check transaxle fluid more
frequently.

WHAT TO DO IN AN EMERGENCY 3- 3
o If you should accidentally get acid on your
skin or in your eyes, immediately remove
any contaminated clothing and flush the area
with clear water for at least 15 minutes. Then
promptly obtain medical attention. If you
must be transported to an emergency facil-
ity, continue to apply water to the affected
area with a sponge or cloth.
o The gas produced by the battery during the
jump-start operation is highly explosive. Do
not smoke or allow a spark or an open flame
in the vicinity.
o The battery being used to provide the jump
start must be 12-volt. If you cannot deter-
mine that it is a 12-volt battery, do not attempt
to use it for the jump start.
o To jump start a car with a discharged battery,
follow this procedure exactly:
1. If the booster battery is installed in another
vehicle, be sure the two vehicles are not
touching.
2. Turn off all unnecessary lights and acces-
sories in both vehicles.
3. Attach the clamps of the jumper cable in the
exact location shown on the illustration. First,
attach one clamp of the jumper cable to the
positive (+) post or cable of the discharged
battery. Then attach the other end of the
same cable to the positive (+) post or cable
of the booster battery. Next, using the other
cable, attach one clamp to the negative (-)
post or cable of the booster battery. Then
attach the other end of that cable to a solidmetal part of the engine away from the
battery. Do not connect the cable to any
moving part.
4. Start the engine in the car with the booster
battery and let it run for a few minutes. This
will help to assure that the booster battery is
fully charged. During the jumping operation,
run the engine in this vehicle at about 2,000
rpm.
5. Start your engine using the normal starting
procedure. After the engine starts, leave the
jumper cables connected and let the engine
run at fast idle or about 2,000 rpm for several
minutes.
6. Carefully remove the jumper cables in the
reverse order of attachment.
If you do not know why your battery became
discharged (because the lights were left on,
etc.), have the charging system checked by
your Hyundai dealer.D030A01A-AATIF THE ENGINE OVERHEATS
If your temperature gauge indicates overheat-
ing, you experience a loss of power, or hear loud
pinging or knocking, the engine is probably too
hot. If this happens, you should:
1. Pull off the road and stop as soon as it is safe
to do so.
2. Place the gear selector lever in "P" (auto-
matic), or neutral (manual transaxle) and set
the parking brake. If the air conditioning is on,
turn it off.
3. If engine coolant is running out under the car
or steam is coming out from the hood, stop
the engine. Do not open the hood until the
coolant has stopped running or the steaming
has stopped. If there is no visible loss of
engine coolant and no steam, leave the
engine running and check to be sure the
engine cooling fan is operating. If the fan is
not running, turn the engine off.
4. Check to see if the water pump drive belt is
missing. If it is not missing, check to see that
it is tight. If the drive belt seems to be
satisfactory, check for coolant leaking from
the radiator, hoses or under the car. (If the
air conditioning had been in use, it is normal
for cold water to be draining from it when you
stop).

4- 2 CORROSION PREVENTION AND APPEARANCE CARE
E020B01A-AATKeep Your Car Clean
The best way to prevent corrosion is to keep
your car clean and free of corrosive materials.
Attention to the underside of the car is particu-
larly important.
o If you live in a high-corrosion area — where
road salts are used, near the ocean, areas
with industrial pollution, acid rain, etc.—, you
should take extra care to prevent corrosion.
In winter, hose off the underside of your car
at least once a month and be sure to clean
the underside thoroughly when winter is
over.
o When cleaning underneath the car, give
particular attention to the components under
the fenders and other areas that are hidden
from view. Do a thorough job; just dampening
the accumulated mud rather than washing it
away will accelerate corrosion rather than
prevent it. Water under high pressure and
steam are particularly effective in removing
accumulated mud and corrosive materials.
o When cleaning lower door panels, rocker
panels and frame members, be sure that
drain holes are kept open so that moisture
can escape and not be trapped inside to ac-
celerate corrosion.
E020A01A-AAT
TO HELP PREVENT CORROSION
You can help prevent corrosion from getting
started by observing the following:
E010D01A-AATMoisture Breeds Corrosion
Moisture creates the conditions in which corro-
sion is most likely to occur. For example, cor-
rosion is accelerated by high humidity, particu-
larly when temperatures are just above freez-
ing. In such conditions, the corrosive material is
kept in contact with the car surfaces by mois-
ture that is slow to evaporate.
Mud is particularly corrosive because it is slow
to dry and holds moisture in contact with the
vehicle. Although the mud appears to be dry, it
can still retain the moisture and promote corro-
sion.
High temperatures can also accelerate corro-
sion of parts that are not properly ventilated so
the moisture can be dispersed. For all these
reasons, it is particularly important to keep your
car clean and free of mud or accumulations of
other materials. This applies not only to the
visible surfaces but particularly to the underside
of the car.
E010C01A-AATHigh-Corrosion Areas
If you live in an area where your car is regularly
exposed to corrosive materials, corrosion pro-
tection is particularly important. Some of the
common causes of accelerated corrosion are
road salts, dust control chemicals, ocean air
and industrial pollution.
E010B01A-AATCommon Causes of Corrosion
The most common causes of corrosion on your
car are:
o Road salt, dirt and moisture that is allowed to
accumulate underneath the car.
o Removal of paint or protective coatings by
stones, gravel, abrasion or minor scrapes
and dents which leave unprotected metal
exposed to corrosion.
E010A01A-AATCORROSION PROTECTION
Protecting Your Hyundai from Corro-
sion
By using the most advanced design and con-
struction practices to combat corrosion,
Hyundai produces cars of the highest quality.
However, this is only part of the job. To achieve
the long-term corrosion resistance your
Hyundai can deliver, the owner's cooperation
and assistance is also required.

CORROSION PREVENTION AND APPEARANCE CARE 4- 3
E020E01A-AATDon't Neglect the Interior
Moisture can collect under the floor mats and
carpeting to cause corrosion. Check under the
mats periodically to be sure the carpeting is dry.
Use particular care if you carry fertilizers, clean-
ing materials or chemicals in the car.
These should be carried only in proper contain-
ers and any spills or leaks should be cleaned up,
flushed with clear water and thoroughly dried.
E020D01A-AATKeep Paint and Trim in Good Condition
Scratches or chips in the finish should be
covered with "touch-up" paint as soon as pos-
sible to reduce the possibility of corrosion. If
bare metal is showing through, the attention of
a qualified body and paint shop is recommended.
E020C01A-AATKeep Your Garage Dry
Don't park your car in a damp, poorly ventilated
garage. This creates a favorable environment
for corrosion. This is particularly true if you
wash your car in the garage or drive it into the
garage when it is still wet or covered with snow,
ice or mud. Even a heated garage can contrib-
ute to corrosion unless it is well ventilated so
moisture is dispersed.
E030A01A-AATWASHING AND WAXING
Washing Your Hyundai
Never wash your car when the surface is hot
from being in the sun. Always wash your car in
the shade.
Wash your car frequently. Dirt is abrasive and
can scratch the paint if it is not removed. Air
pollution or acid rain may damage the paint and
trim through chemical action if pollutants are
allowed to remain in contact with the surface. If
you live near the ocean or in an area where road
salts or dust control chemicals are used, you
should pay particular attention to the underside
of the car. Start by rinsing the car to remove dust
and loose dirt. In winter, or if you have driven
through mud or muddy water, be sure to thor-
oughly clean the underside as well. Use a hard
direct stream of water to remove accumulations
of mud or corrosive materials. Use a good
quality car-washing solution and follow the
manufacturer's directions on the package.
These are available at your Hyundai dealer or
auto parts outlet. Don't use strong household
detergents, gasoline, strong solvents or abra-
sive cleaning powders as these may damage
the finish.
Use a clean sponge or cloth, rinse it frequently
and don't damage the finish by rubbing too hard.
For stubborn spots, dampen them frequently
and remove them a little at a time.
To clean whitewall tires, use a stiff brush or
soapy steel-wool scouring pad.To clean plastic wheel covers, use a clean
sponge or soft cloth and water.
To clean cast aluminum alloy wheels, use a mild
soap or neutral detergent. Do not use abrasive
cleaners. Protect the bare-metal surfaces by
cleaning, polishing and waxing. Because alumi-
num is subject to corrosion, be sure to give
aluminum alloy wheels special attention in win-
ter. If you drive on salted roads, clean the
wheels thoroughly afterwards.
After washing, be sure to rinse thoroughly. If
soapy water dries on the finish, streaking will
result.
When the weather is warm and the humidity low,
you may find it necessary to rinse each section
immediately after washing to avoid streaking.
After rinsing, dry the car using a damp chamois
or soft, absorbent cloth. The reason for drying
the car is to remove water from the car so it will
dry without water spots. Don't rub, this can
damage the finish.
If you find any nicks or scratches in the paint,
use touch-up paint to cover them to prevent
corrosion. To protect the paintwork of the car
against corrosion, you must clean your Hyundai
(at least once a month). Give special attention
to the removal of salt, mud and other sub-
stances on the underside of the splashboards
of the car. Make sure that the outlets and the

VEHICLE MAINTENANCE REQUIREMENTS 5- 5
Note :
*1. FOR CALIFORNIA, THIS MAINTENANCE IS RECOMMENDED, BUT NOT REQUIRED.
*2. FOR EVERY 12 MONTHS OR 12,000 MILES (20,000 KM), WHICHEVER OCCURS FIRST : "R"
F030C08Y-AATR : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if necessary
GENERAL ITEMS
DRIVE BELT
COOLANT
TIMING BELT
MANUAL TRANSAXLE OIL
AUTOMATIC TRANSAXLE FLUID AND FILTER
BRAKE FLUID
BRAKE HOSES AND LINES
REAR BRAKE DRUMS/LININGS, PARKING BRAKE
BRAKE PADS, CALIPERS AND ROTORS
EXHAUST PIPE AND MUFFLER
SUSPENSION MOUNTING BOLTS
STEERING GEAR BOX, LINKAGE & BOOTS/LOWER ARM
BALL JOINT, UPPER ARM BALL JOINT
POWER STEERING PUMP AND HOSES
DRIVESHAFTS AND BOOTS
AIR CONDITIONING REFRIGERANT
AIR CONDITIONER FILTER (For Evaporator and Blower unit) 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 No. DESCRIPTIONMILES X 1000
KILOMETERS X 1000
MONTHS
2.4DOHC (ALT, W/PUMP)
2.7V6 ( ALT, P/STR'G, A/CON)7.5
12
6
I15
24
12
I
I
I
I
I
I
I
I
I22.5
36
18
I30
48
24
I
I
R
I
I
I
I
I
I
I
I
I
I
I
I
I37.5
60
30
I45
72
36
I
I
I
I
I
I
I
I
I52.5
84
42
I60
96
48
I
I
R
R*¹
I
I
I
I
I
I
I
I
I
I
I
I67.5
108
54
I75
120
60
R
I
I
I
I
I
I
I
I82.5
132
66
I90
144
72
I
I
R
I
I
I
I
I
I
I
I
I
I
I
I
I97.5
156
78
I105
168
84
I
R
I
I
I
I
I
I
I112.5
180
90
I120
192
96
I
I
R
R*¹
I
I
I
I
I
I
I
I
I
I
I
I127.5
204
102
I135
216
108
I
I
I
I
I
I
I
I
I142.5
228
114
I150
240
120
R
I
R
I
I
I
I
I
I
I
I
I
I
I
I
I
See Note *
2

5- 6 VEHICLE MAINTENANCE REQUIREMENTS
SEVERE DRIVING CONDITIONSA - Repeated short distance driving
B - Extensive idling
C - Driving in dusty, rough roads
D - Driving in areas using salt or other corrosive materials or in
very cold weather
E - Driving in sandy areas
F040A04Y-AATMAINTENANCE UNDER SEVERE USAGE CONDITIONS
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer to the chart below for the appropriate
maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if necessary
F - More than 50% driving in heavy city traffic during hot weather
above 90°F (32°C)
G - Driving in mountainous areas
H - Towing a trailer
I - Driving for patrol car, taxi or commercial car and vehicle towing
J - Driving over 100 mph ENGINE OIL AND FILTER
AIR CLEANER FILTER
SPARK PLUGS
BRAKE PADS, CALIPERS AND ROTORS
REAR BRAKE DRUMS/LININGS,
PARKING BRAKE
STEERING GEAR BOX, LINKAGE & BOOTS/
LOWER ARM BALL JOINT, UPPER ARM BALL JOINT
DRIVESHAFTS AND BOOTS
MANUAL TRANSAXLE OIL
AUTOMATIC TRANSAXLE FLUID AND FILTER
AIR FILTER (FOR EVAP. AND BLOWER UNIT)
MAINTENANCE ITEM
R
R
R
I
I
I
I
R
R
REVERY 3,000 MILES (4,800 KM) OR 3 MONTHS
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
EVERY 7,500 MILES (12,000 KM) OR 6 MONTHS
EVERY 60,000 MILES (96,000 KM)
EVERY 30,000 MILES (48,000 KM)
MORE FREQUENTLY
DRIVING
CONDITION MAINTENANCE
INTERVALS MAINTENANCE
OPERATION
A, B, C, F, H
C, E
B, H
C, D, G, H
C, D, G, H
C, D, E, F, G
C, E, F
A, C, D, E, F, G, H, I, J
A, C, E, F, G, H, I
C, E