2003 Hyundai Sonata air condition

6- 4 DO-IT-YOURSELF MAINTENANCE
G020C01A-AATVehicle Interior
The following should be checked each time
when the vehicle is driven:
o Lights operation
o Windshield wiper operation
o Horn operation
o Defroster, heating system operation (and air
conditioning, if installed)
o Steering operation and condition
o Mirror condition and operation
o Turn signal operation
o Accelerator pedal operation
o Brake operation, including parking brake
o Manual transaxle operation, including clutch
operation
o Automatic transaxle operation, including
"Park" mechanism operation
o Seat control condition and operation
o Seat belt condition and operation
o Sunvisor operation
If you notice anything that does not operate
correctly or appears to be functioning incor-
rectly, inspect it carefully and seek assistance
from your Hyundai dealer if service is needed.
G020B01A-AATVehicle Exterior
The following should be checked monthly:
o Overall appearance and condition
o Air filter condition
o Wheel condition and wheel nut torque
o Exhaust system condition
o Light condition and operation
o Windshield glass condition
o Wiper blade condition
o Paint condition and body corrosion
o Fluid leaks
o Door and hood lock condition
o Tire pressure and condition (including spare
tire)
G020A01A-AATGENERAL CHECKS
Engine Compartment
The following should be checked regularly:
o Engine oil level and condition
o Transaxle fluid level and condition
o Brake fluid level
o Clutch fluid level
o Engine coolant level
o Windshield washer fluid level
o Accessory drive belt condition
o Engine Coolant hose condition
o Fluid leaks (on or below components)
o Power steering fluid level
o Battery condition

DO-IT-YOURSELF MAINTENANCE 6- 15
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G130A01A-AATCHECKING THE CLUTCH FLUID
To Check the Clutch FluidG130B02A-AATTo Replace the Fluid
Recommended brake fluid conforming to DOT
3 or DOT 4 specification should be used. The
reservoir cap must be fully tightened to avoid
contamination from foreign matter or moisture.
NOTE:Do not allow any other liquids to contami-
nate the brake fluid. Seal damage will result.
WARNING:Handle brake fluid carefully. It can damage
your vision if it gets into your eyes. Use only
DOT 3 or DOT 4 specification fluid from a
sealed container. Do not allow the fluid can
or reservoir to remain open any longer than
required. This will prevent entry of dirt and
moisture which can damage the brake sys-
tem and cause improper operation.
To add brake fluid, first wipe away any dirt then
unscrew the fluid reservoir cap. Slowly pour the
recommended fluid into the reservoir. Do not
overfill. Carefully replace the cap on the reser-
voir and tighten.
!
The clutch fluid level in the master cylinder
should be checked when performing other un-
der hood services. The system should be
checked for leakage at the same time. Check
to make certain that the clutch fluid level is
always between the "MAX" and "MIN" level
markings on the fluid reservoir. Fill as required.
Fluid loss indicates a leak in the clutch system
which should be inspected and repaired imme-
diately. Consult your Hyundai dealer.
WARNING:Use caution when handling brake fluid. It
can damage your vision if you get it in your
eyes. It will also damage your vehicle's
paint if spilled on it and not removed imme-
diately.
G140A01A-AATAIR CONDITIONING CARE
Keeping the Condenser Clean
The air conditioning condenser (and engine
radiator) should be checked periodically for
accumulation of dirt, dead insects, leaves, etc.
These can interfere with maximum cooling ef-
ficiency. When removing such accumulations,
brush or hose them away carefully to avoid
bending the cooling fans.
G130A01Y
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6- 16 DO-IT-YOURSELF MAINTENANCE
G150A01A-AATCHECKING STEERING WHEEL
FREE-PLAYG140D01A-AATChecking the Compressor Drive Belt
G140C01A-AATLubrication
To lubricate the compressor and the seals in the
system, the air conditioning should be run for at
least 10 minutes each week. This is particularly
important during cool weather when the air
conditioning system is not otherwise in use.
G140B01A-AATChecking the Air Conditioning Opera-
tion
1. Start the engine and let it run at a fast idle for
several minutes with the air conditioning set
at the maximum cold setting.
2. If the air coming out of the in-dash vents is
not cold, have the air conditioning system
inspected by your Hyundai dealer.
CAUTION:Running the air conditioning system for
extended periods of time with a low refrig-
erant level may damage the compressor.
!
When the air conditioning is being used regu-
larly, the compressor drive belt tension should
be checked at least once a month with the
engine turned off.
To check the drive belt tension, press down on
the belt halfway between the engine crankshaft
and compressor pulleys. Pressing with your
finger, you should not be able to deflect this belt
anymore than 1/3 of an inch. If you have the
instruments to check it, with a force of 22 lb.
(98N), the deflection should be 0.315 inches
(approx 8.0 mm). If the belt is too loose, have it
adjusted by your Hyundai dealer.To check the steering wheel free-play, stop the
car with the wheels pointed straight ahead and
gently move the steering wheel back and forth.
Use very light finger pressure and be sensitive
to changes in resistance that mark the limits of
the free-play. If the free-play is greater than
specified, have it inspected by your Hyundai
dealer and adjusted or repaired if necessary.
HSM396
G150A01Y
Maximum
1.18 in.
(30 mm)
DOHC V6
Eng.pulleyCOMP
Eng.pulleyCOMP 0.315 in.
Auto tensioner

6- 20 DO-IT-YOURSELF MAINTENANCE
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G230A03A-AATPOWER STEERING FLUID LEVEL
G220B01A-AATChecking Engine Cooling Fan
The engine cooling fan should come on auto-
matically if the engine coolant temperature is
high.
G220A01A-AATCHECKING ELECTRIC COOLING
FANS
G220C01A-AATChecking Condenser Cooling Fan
The condenser coolant fan should come on
automatically whenever the air conditioning is in
operation.
G210B02A-AATChecking the Battery
Keep the battery clean. Any evidence of corro-
sion around the battery posts or terminals
should be removed using a solution of house-
hold baking soda and warm water. After the
battery terminals are dry, cover them with a light
coating of grease. While batteries are being charged (either by a
battery charger or by the vehicle's generator),
they produce explosive gases. Always ob-
serve these warnings to prevent injuries from
occurring:
o Charge batteries only in a well ventilated
area.
o Do not permit flames, sparks or smoking in
the area.
o Keep children away from the area.
WARNING:The cooling fan is controlled by engine
coolant temperature and may sometimes
operate even when the engine is not run-
ning. Use extreme caution when working
near the blades of the coolant fan, so that
you are not injured by a rotating fan blade.
As the engine coolant temperature de-
creases the fan will automatically shut off.
This is a normal condition.
The power steering fluid level should be checked
regularly. To check the power steering fluid
level, be sure the engine is "OFF", then check
to make certain that the power steering fluid
level is between the "MAX" and "MIN" level
markings on the fluid reservoir.
NOTE:Grinding noise from the power steering
pump may be heard immediately after the
engine is started in extremely cold condi-
tions (below - 4°F). If the noise stops during
warm up, there is no abnormal function in
the system. It is due to a power steering
fluid characteristic in extremely cold condi-
tions.
G230A03Y
PROPOSITION 65 WARNING:Battery posts, terminals, and related acces-
sories contain lead and lead compounds,
chemicals known to the state of California
to cause cancer and reproductive harm.
Wash hands after handling.
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6- 30 DO-IT-YOURSELF MAINTENANCE
G200D02Y-GATInstrument panel junction boxDESCRIPTIONFUSE RATING PROTECTED COMPONENTS
RR HTD IND 10A Rear window defroster, Outside rear view mirror heater
HAZARD 10AHazard light, Turn signal lights
RR FOG 15A Rear fog light
A/CON 10AAir conditioning system
ETACS 10A ETACS, Keyless entry system, Door lock system
DR LOCK 15A Power door lock
P/SEAT 25A Power seat
T/LID OPEN 15A Remote trunk lid
STOP LP 15A Stop lights
H/LP 10A Head light
A/BAG IND 10AAir-bag
T/SIG 10ATurn signal lights
A/CON SW 10A Air conditioning system
ACC SOCKET 15A Power outlet
S/HTR 15ASeat heater
A/BAG 15A Air-bag
B/UP 10A Backup lights
CLUSTER 10A Cluster
START 10AEngine switch
SP1 15A Spare fuse
SP2 15A Spare fuse
P/SEAT (RH) 25A Power Seat
SP4 15A Spare fuse
D/CLOCK 10ADigtal clock
TAIL(LH) 10APosition lights, License plate lights, Tail lights
AUDIO 10A Audio
WIPER 20A Wiper
ROOM LP 10A Dome lights, Front door edge warning lights
TAIL(RH) 10APosition lights, License plate lights, Tail lights
C/LIGHTER 15ACigar lighter
EPS 10A
G200C02Y

EMISSION CONTROL SYSTEMS 7- 3
!WARNING:o Use unleaded fuel only.
o Maintain the engine in good operating
condition. Extremely high catalytic con-
verter temperatures can result from im-
proper operation of the electrical, igni-
tion or multiport electronic fuel injec-
tion.
o If your engine stalls, pings, knocks, or is
hard to start, have your Hyundai dealer
inspect and repair the problem as soon
as possible.
o Avoid driving with a very low fuel level.
Running out of gasoline may cause the
engine to misfire and result in damage to
the catalytic converter.
o Avoid idling the engine for periods
longer than 10 minutes.
o The vehicle should not be pushed or
pulled to get started. This may cause the
catalytic converter to overheat and cre-
ate a fire hazard.
o Do not touch the catalytic converter or
any other part of the exhaust system
while the catalytic converter is hot. Shut
off the engine, wait for at least one hour
before touching the catalytic converter
or any other part of the exhaust system.
o Remember that your Hyundai dealer is
your best source of assistance.
H020A01A-AATCATALYTIC CONVERTER
All Hyundai vehicles are equipped with a mono-
lith type three-way catalytic converter to re-
duce the carbon monoxide, hydrocarbons and
nitrogen oxides contained in the exhaust gas.
Exhaust gases passing through the catalytic
converter cause it to operate at a very high
temperature. The introduction of large amounts
of unburned gasoline into the exhaust may
cause the catalytic converter to overheat and
create a fire hazard. This risk may be reduced
by observing the following:o Do not stop your Hyundai over any com-
bustible material such as grass, paper,
leaves or rags. These materials might
contact the hot catalytic converter and a
fire might result.
Catalytic Converter
HEF-240

CONSUMER INFORMATION & REPORTING SAFETY DEFECTS 8- 3
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I050A02Y-AATTIRE CHAINS
Tire chains, if necessary, should be installed on
the front wheels. Be sure that the chains are the
proper size and that they are installed in accor-
dance with the manufacturer's instructions.
To minimize tire and chain wear, do not continue
to use tire chains when they are no longer
needed.
I040A01S-AATSNOW TIRES
If you equip your car with snow tires, they should
be the same size and have the same load
capacity as the original tires. Snow tires should
be installed on all four wheels; otherwise, poor
handling may result.
Snow tires should carry 4 psi (28 kPa) more air
pressure than the pressure recommended for
the standard tires on the tire label on the driver's
door edge , or up to the maximum pressure
shown on the tire sidewall whichever is less.
Do not drive faster than 75 mph (120 km/h)
when your car is equipped with snow tires. These pressures were chosen to provide the
most satisfactory combination of ride comfort,
tire wear and stability under normal conditions.
Tire pressures should be checked at least
monthly. Proper tire inflation pressures should
be maintained for these reasons:
o Lower-than-recommended tire pressures
cause uneven tread wear and poor handling.
o Higher-than-recommended tire pressures
increase the chance of damage from im-
pacts and cause uneven tread wear.
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WARNING:When driving on roads covered with snow
or ice, drive at less than 20 mph (30 km/h).
I060A02A-AATTIRE ROTATION
Tires should be rotated every 7,500 miles
(12,000 km). If you notice that tires are wearing
unevenly between rotations, have the car
checked by a Hyundai dealer so the cause may
be corrected.
After rotating, adjust the tire pressures and be
sure to check the wheel nut tightness.
CAUTION:Always observe the following:
o Check pressures when the tires are cold.
That is, after the car has been parked for
at least three hours and hasn't been
driven more than one mile or 1.6 km since
starting up.
o Check the pressure of your spare tire
each time you check the pressure of
other tires.
o Never overload your car. Be especially
careful about overloading if you equip
your car with a luggage rack or car top
carrier.
WARNING:o Do not use the temporary spare tire for
tire rotation.
o Do not mix bias ply and radial ply tires
under any circumstances. This may
cause unusual handling characteristics
that could result in death, serious injury,
or property damage.
HEF-241

10- 2 INDEX
A
Air bag ...............................................................................................1-28
Air Cleaner Filter ...............................................................................6-11
Air Conditioning
Care..............................................................................................6-15
Operation............................................................................ 1-70, 6-16
Switch...........................................................................................1-70
Antenna ..........................................................................................1-100
Ashtray..............................................................................................1-46
Audio (H240, H260, H290) ........................................... 1-80, 1-85, 1-90
B
Battery..................................................................................... 2-14, 6-19
Brake
Anti-lock system ..........................................................................2-10
Checking the brakes ....................................................................6-14
Fluid ..............................................................................................6-14
Pedal clearance ...........................................................................6-17
Pedal free-play .............................................................................6-17
Practices......................................................................................2-12
Breaking-In your New Hyundai .......................................................... 1-3
Bulb Replacement .............................................................................6-21
C
Care of Cassette Tapes ...................................................................1-98
Cassette Tape Player Operation (H240, H290) .................... 1-83, 1-93
Catalytic Converter ............................................................................. 7-3
Child Restraint System .....................................................................1-22
Child-Protector Rear Door Lock ......................................................... 1-6
Cigarette Lighter ................................................................................1-45
Clock.................................................................................................1-45Clutch
Checking fluid ...............................................................................6-15
Pedal free-play .............................................................................6-17
Combination Light
Headlight flasher ..........................................................................1-42
Headlight switch ...........................................................................1-41
High-beam switch ........................................................................1-42
Lane change signal ......................................................................1-41
Turn signal operation ...................................................................1-41
Compact Disk Player Operation (H260, H290) ..................... 1-88, 1-95
Consumer Information ........................................................................ 8-5
Cooling Fans .....................................................................................6-20
Corrosion protection
Cleaning the interior ....................................................................... 4-4
Protecting your Hyundai from corrosion ....................................... 4-2
Washing and waxing ...................................................................... 4-3
Cruise Control ...................................................................................1-62
D
Defrosting/Defogging........................................................................1-71
Door
Door locks ...................................................................................... 1-4
Front door edge warning light ......................................................1-60
Locking, unlocking front door with a key ...................................... 1-4
Drink Holder ......................................................................................1-47
Drive Belts .........................................................................................6-18
Driving
Economical driving .......................................................................2-13
Smooth cornering .........................................................................2-13
Winter driving ...............................................................................2-13