2004 Hyundai Sonata engine

1- 58 FEATURES OF YOUR HYUNDAI
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B560A02Y-AATREMOTE FUEL-FILLER LID RELEASE
The fuel-filler lid may be opened from inside the
vehicle by pushing up on the fuel-filler lid opener
located on the driver side door.
NOTE:If the fuel-filler lid will not open because ice
has formed around it, tap lightly or push on
the lid to break the ice and release the lid. Do
not pry on the lid. If necessary, spray around
the lid with an approved de-icer fluid (do
not use radiator anti-freeze) or move the
vehicle to a warm place and allow the ice to
melt.
B550A02Y-AATHIGH-MOUNTED REAR STOP LIGHT
In addition to the lower-mounted rear stoplights
on either side of the car, the high mounted rear
stoplight in the center of the rear window also
lights when the brakes are applied.WARNING:o Gasoline vapors are dangerous. Before
refueling, always stop the engine and
never allow sparks or open flames near
the filler area. If you need to replace the
filler cap, use a genuine Hyundai re-
placement part.
o If you open the fuel filler cap during high
ambient temperatures, a slight "pres-
sure sound" may be heard. This is nor-
mal and not a cause for concern.
Whenever you open the fuel filler cap,
turn it slowly.
o Make sure the fuel filler cap is replaced
and securely seated after fueling. Failure
to replace or fully seat the fuel filler cap
will result in fuel vapors escaping into
the atmosphere and the check engine
(MIL) indicator illuminating.
B550A03Y
HEF-132AB560A02Y
Fuel Cap Holder

FEATURES OF YOUR HYUNDAI 1- 75
With the "Recirculation" mode selected, and air
from within the passenger compartment will be
drawn through the heating system and heated
or cooled according to the function selected.
NOTE:o It should be noted that prolonged opera-
tion of the heating system in "recircula-
tion" mode will give rise to fogging of the
windshield and side windows and the air
within the passenger compartment will
become stale. In addition, prolonged
use of the air conditioning with the "Re-
circulation" mode selected may result in
the air within the passenger compart-
ment becoming excessively dry.
o When the ignition switch is turned "ON"
the air intake control will change to " "
mode (regardless of the switch posi-
tion). This is normal operation. The air
intake control operates in "AUTO" mode
when turning the ignition to the ON
position if the "AUTO" mode was used
before shutting off the engine.
B980D01Y-AATHeating and Cooling System Off
Press the "OFF" button to stop the operation of
the heating and cooling system.
B980E01Y-GATAir Flow Control
This is used to direct the flow of air. Air can be
directed to the floor, dashboard outlets, or
windshield. Four symbols are used to represent
Face, Bi-Level, Floor, Floor-Defrost position.
Face-LevelWhen selecting the "Face" mode, the indicator
light will come on, causing air to be discharged
through the face level vents.
HEF-025HEF-043
HEF-044

1- 78 FEATURES OF YOUR HYUNDAI
B760A06Y-AATAIR CONDITIONER FILTER (FOR
EVAPORATOR AND BLOWER UNIT)
(If installed)
The air conditioner filter is located in the evapo-
rator behind the glove box.
It operates to decrease pollutants the amount of
entering the car.
CAUTION:o Replace the filter every 12,000 miles
(20,000 km) or once a year.
If the car is being driven in severe condi-
tions such as dusty, rough roads, more
frequent air conditioner filter inspec-
tions and changes are required.
o When the air flow rate is suddenly de-
creased, it must be checked at an autho-
rized dealer.
o If your vehicle is not equipped with this
filter, it can be installed by your dealers.
Check with your dealer for details.
!
B740D01Y-AATOperation Tips
o If the interior of the car is hot when you first
get in, open the windows for a few minutes
to expel the hot air.
o When you are using the air conditioning
system, keep all windows closed to keep hot
air out.
o When moving slowly, as in heavy traffic, shift
to a lower gear. This increases engine speed,
which in turn increases the speed of the air
conditioning compressor.
o On steep grades, turn the air conditioning off
to avoid the possibility of the engine over-
heating.
o During winter months or in periods when the
air conditioning is not used regularly, run the
air conditioning once every month for a few
minutes. This will help circulate the lubri-
cants and keep your system in peak oper-
ating condition.
B760A01Y
Inside of a
vehicle
Evaporator coreFilterBlowerOutside air
Inside air

FEATURES OF YOUR HYUNDAI 1- 79
B750A02A-AATSTEREO SOUND SYSTEM
How Car Audio Works
AM and FM radio signals are broadcast from
transmitter towers located around your city.
They are intercepted by the radio antenna on
your car. This signal is then received by the
radio and sent to your car speakers.
When a strong radio signal has reached your
vehicle, the precise engineering of your audio
system ensures high quality reproduction.
However, in some cases the signal coming to
your vehicle is not strong and clear. This can be
due to factors such as the distance from the
radio station, closeness of other strong radio
stations or the presence of buildings, bridges or
other large obstructions in the area.AM broadcasts can be received at greater
distances than FM broadcasts. This is because
AM radio waves are transmitted at low fre-
quency. These long, low frequency radio waves
can follow the curvature of the earth rather than
travelling straight out into the atmosphere. In
addition, they curve around obstructions so that
they can provide better signal coverage.FM broadcasts are transmitted at high fre-
quency and do not bend to follow the earth's
surface. Because of this, FM broadcasts gen-
erally begin to fade at short distances from the
station. Also, FM signals are easily affected by
buildings, mountains, or other obstructions.
These can result in certain listening conditions
which might lead you to believe a problem exists
with your radio. The following conditions are
normal and do not indicate radio trouble:
Ionosphere
B750A02L
AM reception
Mountains
BuildingsUnobstructed
area FM radio station
B750A03L
Ionosphere FM reception
B750A01L
Obstructed areaIron bridges

2. DRIVING YOUR HYUNDAI
Before starting the engine ................................................................ 2-3
Key position ..................................................................................... 2-3
Starting.............................................................................................2-4
Operating the manual transaxle ....................................................... 2-5
Automatic transaxle ......................................................................... 2-7
Anti-Lock Brake System (ABS) .....................................................2-10
Traction Control System (TCS) .....................................................2-11
Good braking practices..................................................................2-12
Driving for economy.......................................................................2-13
Winter Driving.................................................................................2-13
Trailer or vehicle towing ................................................................. 2-16
2

2- 2 DRIVING YOUR HYUNDAI
!WARNING: ENGINE EXHAUST CAN BE DANGEROUS!
C010A03A-AATEngine exhaust fumes can be extremely dangerous. If, at any time, you smell exhaust fumes inside the vehicle, open the windows immediately.
o Do not inhale exhaust fumes.
Exhaust fumes contain carbon monoxide, a colorless, odorless gas that can cause unconsciousness and death by asphyxiation.
o Be sure the exhaust system does not leak.
The exhaust system should be checked whenever the vehicle is raised to change the oil or for any other purpose. If you hear a change
in the sound of the exhaust or if you drive over something that strikes the underneath side of the car, have the exhaust system checked
as soon as possible by your Hyundai dealer.
o Do not run the engine in an enclosed area.
Letting the engine idle in your garage, even with the garage door open, is a hazardous practice. Never run the engine in your garage any
longer than it takes to start the engine and back the car out.
o Avoid idling the engine for prolonged periods with people inside the car.
If it is necessary to idle the engine for a prolonged period with people inside the car, be sure to do so only in an open area with the air intake
set at "Fresh" and fan operating at one of the higher speeds so fresh air is drawn into the interior.
If you must drive with the trunk lid/ tail gate open because you are carrying objects that make this necessary:
1. Close all windows.
2. Open side vents.
3. Set the air intake control at "Fresh", the air flow control at "Floor" or "Face" and the fan at one of the higher speeds.
To assure proper operation of the ventilation system, be sure the ventilation air intakes located just in front of the windshield are kept clear
of snow, ice, leaves or other obstructions.
!PROPOSITION 65 WARNING:Engine exhaust and a wide variety of automobile components and parts, including components found in the interior furnishings
in a vehicle, contain or emit chemicals known to the State of California to cause cancer and birth defects and reproductive harm.
In addition, certain fluids contained in vehicles and certain products of component wear contain or emit chemicals known to
the State of California to cause cancer and birth defects or other reproductive harm.

DRIVING YOUR HYUNDAI 2- 3
C020A01A-AATBEFORE STARTING THE ENGINE
Before you start the engine, you should always:
1. Look around the vehicle to be sure there are
no flat tires, puddles of oil, water or other
indications of possible trouble.
2. After entering the car, check to be sure the
parking brake is engaged.
3. Check that all windows, and lights are clean.
4. Check that the interior and exterior mirrors
are clean and in position.
5. Check your seat, seatback and headrest to
be sure they are in their proper positions.
6. Lock all the doors.
7. Fasten your seat belt and be sure that all
other occupants have fastened theirs.
8. Turn off all lights and accessories that are
not needed.
9. When you turn the ignition switch to "ON",
check that all appropriate warning lights are
operating and that you have sufficient fuel.
10.Check the operation of warning lights and all
bulbs when key is in the "ON" position.
C030A01A-AATCOMBINATION IGNITION SWITCH
To Start the Engine
Before starting the engine:
o If your Hyundai is equipped with a manual
transaxle, place the shift lever in neutral and
depress the clutch.
o If your Hyundai has an automatic transaxle,
place the shift lever in "P" (park).
o To start the engine, insert the ignition key and
turn it to the "START" position. Release it as
soon as the engine starts. Do not hold the
key in the "START" position for more than 15
seconds.
NOTE:o For safety, the engine will not start if the
shift lever is not in "P" or "N" Position.
o The ignition key cannot be turned from
"ACC" position to "LOCK" position un-
less the shift lever is in the "P" (Park)
position or the negative battery terminal
is disconnected from the battery. To
remove the key, always confirm that the
shift lever is securely positioned in "P"
(Park).
o For additional information about start-
ing, see page 2-3.
C040A01Y-AATKEY POSITIONS
CAUTION:
The engine should not be turned off or the
key removed from the ignition key cylinder
while the car is in motion.
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o "START"
The engine is started in this position. It will crank
until you release the key.
NOTE:Do not hold the key in the "START" position
for more than 15 seconds.LOCKACC
ON
START

2- 4 DRIVING YOUR HYUNDAI
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C070C02A-AATTo Remove the Ignition KeyC050A01A-AATSTARTING o "ON"When the key is in the "ON" position, the ignition
is on and all accessories may be turned on. If
the engine is not running, the key should not be
left in the "ON" position. This will discharge the
battery and may also damage the ignition sys-
tem.
o "ACC"
With the key in the "ACC" position, radio and
other accessories may be operated. If you open
the driver's door with the key in the "ACC" or
"LOCK" position, the chime will sound to remind
you that the key should be removed.
o "LOCK"
The key can be removed or inserted in this
position. Steering is locked by removing the
key. When unlocking the steering, insert the
key, and then turn the steering wheel and key
simultaneously.
NOTE:To unlock the steering wheel, insert the key,
and then turn the steering wheel and key
simultaneously.(If your vehicle is equipped with an automatic
transaxle)
1. Turn the ignition key counterclockwise from
the "ACC" position to the "LOCK" position.
2. The key can be removed in the "LOCK"
position.
(If your vehicle is equipped with a manual
transaxle)
1. Turn the ignition key to the "ACC" position.
2. Simultaneously push and turn the ignition
key counterclockwise from the "ACC"
position to the "LOCK" position.
3. The key can be removed in the "LOCK"
position.
WARNING:Never run the engine in a closed or poorly
ventilated area any longer than is needed to
move your car in or out of the area. The
carbon monoxide gas emitted is odorless
and can cause serious injury or death.
C070C01E-1
C050A01E-1
LOCKACC
ON
STARTLOCK
ON
START