2003 Hyundai Sonata engine

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 switch position).
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 shut-
ting 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

FEATURES OF YOUR HYUNDAI 1- 77
B980G02Y-GATAuto de-humidified control (If installed)
There is a humidity sensor on the package tray,
In case it is very humid inside the car. The air
conditioning is turned on automatically to control
the humidity.
B760A05Y-AAT
AIR FILTER (FOR EVAPORATOR AND
BLOWER UNIT) (If installed)
The air filter is located in the evaporator behind
the glove box.
It operates to prevent pollutants from entering
the car and to purify the air.
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 filter inspections 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

1- 78 FEATURES OF YOUR HYUNDAI
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!C010A02A-AATEngine exhaust fumes can be extremely dangerous. If, at any time, you smell exhaust fumes inside the vehicle, open the windows
immediately.
Engine exhaust, some of its constituents, and certain vehicle components 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.
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 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.
!

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.
!
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.LOCKACC
ON
START

2- 4 DRIVING YOUR HYUNDAI
!
C070C02A-AATTo Remove the Ignition KeyC050A01A-AATSTARTING 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.
(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

DRIVING YOUR HYUNDAI 2- 5
!
C050B01A-AATNormal Conditions:
The Starting Procedure:
1. Insert key, and fasten the seat belt.
2. Depress the clutch pedal fully and place the
gearshift lever (manual transaxle) in neutral
or the selector lever (automatic transaxle) in
"P" (park) position.
3. After turning the ignition key to the "ON"
position, make certain all warning lights and
gauges are functioning properly before start-
ing the engine.
WARNING:Be sure that the clutch is fully depressed
when starting a manual transaxle vehicle.
Your manual transaxle equipped vehicle
will not start unless the clutch pedal is fully
depressed. On a manual transaxle equipped
vehicle that can be started without de-
pressing the clutch, there is the potential to
cause
damage to the vehicle or injury to someone
inside or outside the vehicle as a result of
the forward or backward movement of the
vehicle that will occur if the clutch is not
depressed when the vehicle is started.4. Turn the ignition key to the "Start" position
and release it when the engine starts.
After the engine has started, allow the engine
to run for 10 to 20 seconds prior to placing
the vehicle in gear.
The starter should not be operated for more
than 15 seconds at a time. Wait 15-30 sec-
onds between starting attempts to protect
the starter from overheating.
C070A02A-AAT
OPERATING THE MANUAL
TRANSAXLE
Your Hyundai's manual transaxle has a con-
ventional shift pattern. This shift pattern is im-
printed on the shift knob. The transaxle is fully
synchronized in all forward gears so shifting to
either a higher or a lower gear is easily accom-
plished.
NOTE:o To shift into reverse, rest the lever in
neutral for at least 3 seconds after your
car is completely stopped. Then move
the lever into the reverse position.
o During cold weather, shifting may be
difficult until the transaxle lubricant has
warmed up. This is normal and not harm-
ful to the transaxle.
o If you've come to a complete stop and
it's hard to shift into 1st or R(Reverse),
put the shift lever in N(Neutral) position
and release the clutch. Press the clutch
pedal back down, and then shift into 1st
or R(Reverse) gear position.
o Do not use the shift lever as a handrest
during driving, as this can result in pre-
mature wear of the transaxle shift forks.
!CAUTION:When downshifting from fifth gear to fourth
gear, caution should be taken not to inad-
vertently press the gear lever sideways in
such a manner that second gear is en-
gaged. Such a drastic downshift may cause
the engine speed to increase to the point
that the tachometer will enter the red-zone.
Such over-revving of the engine may pos-
sibly cause engine damage.
HEF-238