2004 Hyundai Elantra check engine light

3WHAT TO DO IN AN EMERGENCY
2
D010B02E
D010C01E
IF THE ENGINE WILL NOT START
!
D010A01A-AAT D010B02A-AAT
If Engine Doesn't Turn Over or Turns
Over Slowly
D010C01A-AAT
If Engine Turns Over Normally but Does
Not Start
WARNING:
If the engine will not start, do not push or
pull the car to start it. This could result in a
collision or cause other damage. In addi-
tion, push or pull starting may cause the
catalytic converter to be overloaded and
create a fire hazard.
1. If your car has an automatic transaxle, be
sure the gear selector lever is in "N" or "P"
and the emergency brake is set.
2. Check the battery connections to be sure
they are clean and tight.
3. Turn on the interior light. If the light dims or
goes out when you operate the starter, the
battery is discharged.
4. Check the starter connections to be sure
they are securely tightened.
5. Do not push or pull the vehicle to start it. See
instructions for "Jump Starting".1. Check fuel level.
2. With the key in the "OFF" position, check all
connectors at ignition, coils and spark plugs.
Reconnect any that may be disconnected or
loose.
3. Check the fuel line in the engine room.
4. If the engine still refuses to start, call a
Hyundai dealer or seek other qualified assis-
tance.

3WHAT TO DO IN AN EMERGENCY
4IF THE ENGINE OVERHEATS
!
!WARNING:While the engine is running, keep hair,
hands, and clothing away from moving
parts such as the fan and drive belts to
prevent injury.
5. If the water pump drive belt is broken or
engine coolant is leaking out, stop the engine
immediately and call the nearest Hyundai
dealer for assistance.
WARNING:Do not remove the radiator cap when the
engine is hot. This can allow coolant to be
blown out of the opening and cause seri-
ous burns.
6. If you cannot find the cause of the overheat-
ing, wait until the engine temperature has
returned to normal. Then, if coolant has been
lost, carefully add coolant to the reservoir
(page 6-9) to bring the fluid level in the
reservoir up to the halfway mark.
7. Proceed with caution, keeping alert for fur-
ther signs of overheating. If overheating
happens again, call a Hyundai dealer for
assistance.
D030A01A-AAT
If your temperature gauge indicates overheat-
ing, you experience a loss of power, or hear loud
pinging or knocking and the engine is probably
too hot. If this happens and, 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
engine 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 engine coolant leak-
ing 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). post or cable of the booster battery. Then
attach the other end of that cable to a solid
metal 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 the engine in the car with the dis-
charged battery 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.

Engine Compartment .................................................... 6-2
General Checks ............................................................ 6-3
Checking the Engine Oil ............................................... 6-4
Changing the Oil and Filter ............................................ 6-5
Checking and Changing the Engine Coolant ................ 6-6
Spark Plugs .................................................................. 6-9
Changing the Air Cleaner Filter ...................................6-11
Checking the Transaxle Oil (Manual) .........................6-12
Checking the Transaxle Fluid (Automatic)..................6-13
Checking the Brakes ..................................................6-15
Checking the Clutch Fluid...........................................6-16
Air Conditioning Care..................................................6-17
Changing The Air Filter ...............................................6-18
Checking Drive Belts..................................................6-20
Checking and Replacing Fuses..................................6-21
Checking the Battery..................................................6-22
Power Steering Fluid Level .........................................6-24
Replacement of Light Bulbs ........................................ 6-26
Bulb Wattage...............................................................6-33
Fuse Panel Description...............................................6-34
Do-It-Yourself Maintenance
66

6DO-IT-YOURSELF MAINTENANCE
3GENERAL CHECKS
G020C01A-AAT
Vehicle 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-AAT
Vehicle Exterior
The following should be checked monthly:
o Overall appearance and 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-AAT
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 conditio
o Air filter condition

6DO-IT-YOURSELF MAINTENANCE
19
G150A02E
CHECKING THE FREEPLAY
G160A01A-AAT
Clutch Pedal
With the engine off, press lightly on the clutch
pedal until you feel a change in resistance. This
is the clutch pedal free-play. The free-play
should be within the limits specified in the illus-
tration. If it is not, have it inspected by your
Hyundai dealer and adjusted or repaired if
necessary.
G160A01E
0.24 ~ 0.51 in.
(6 ~ 13 mm)
G150A01A-AAT
Steering wheel
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.1.18 in.
(30 mm)
4. Replace the air filter with a new one.
5. Installation is the reverse order of disassem-
bly.
!
3. Remove the filter cover by pushing the two
hooks of the filter cover.
CAUTION:Be sure to install the air filter in the direction
of the arrow sign. Otherwise, it may cause
noise or deterioration.
HXD2099

6DO-IT-YOURSELF MAINTENANCE
23CHECKING ELECTRIC COOLING
FANS
!
!
G220B01A-AATChecking Engine Cooling Fan
The engine cooling fan should come on auto-
matically if the engine coolant temperature is
high.
G220A01A-AAT
G220C01A-AAT
Checking Condenser Cooling Fan
The condenser coolant fan should come on
automatically whenever the air conditioning is in
operation.
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.
G210B02A-AAT
Checking 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.
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. o If battery fluid is on your skin, flush the
affected areas with water for at least 15
minutes and then seek medical assistance.
o If battery fluid is in your eyes, rinse out your
eyes with water and get medical assistance
as soon as possible. While you are being
driven to get medical assistance, continue to
rinse your eyes by using a sponge or soft
cloth saturated with water.
o If you swallow battery fluid, drink a large
quantity of water or milk followed by milk of
magnesia, eat a raw egg or drink vegetable
oil. Get medical assistance as soon as
possible.
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.

6DO-IT-YOURSELF MAINTENANCE
24POWER STEERING FLUID LEVEL
G230A03A-AAT
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.
G230A01E
HEADLIGHT AIMING ADJUSTMENT
G250A01A-AATFOR MORE INFORMATION ABOUT
YOUR HYUNDAI
If you desire additional information about main-
taining and servicing your Hyundai, you may
purchase a factory Shop Manual at your Hyundai
dealer's parts department. This is the same
manual used by dealership technicians and
while it is highly technical it can be useful in
obtaining a better understanding of your car and
how it works.
G240A01A-AATPOWER STEERING HOSES
It is suggested that you check the power steer-
ing hose connections for fluid leakage at regular
intervals. The power steering hoses should be
replaced if there is severe surface cracking,
scuffing or worn spots. Deterioration of the hose
could cause premature failure.
Recommended FluidUse PSF-3 type fluid
NOTE:Do not start the engine when the power
steering oil reservoir is empty.
G290A03E-AATBefore performing aiming adjustment, make
sure of the following.
1. Keep all tires inflated to the correct pressure.
2. Place the vehicle on level ground and press
the front bumper & rear bumper down sev-
eral times. Place the vehicle at a distance of
118 in. (3,000 mm) from the test wall.
3. See that the vehicle is unloaded (except for
full levels of coolant, engine oil and fuel, and
spare tire, jack, and tools). Have the driver
or equivalent weight placed in driver's seat.
4. Clean the head light lenses and turn on the
headlights (Low beam).
Vertical
Aiming
G290A02E-A

10INDEX
3
D
Defrosting / Defogging ......................................................................1-87
Door
Locking, unlocking front door with a key ...................................... 1-5
Drink Holder ......................................................................................1-61
Drive Belts.........................................................................................6-20
Driving
Driving for economy .....................................................................2-13
Smooth cornering.........................................................................2-14
Winter driving...............................................................................2-15
E
Emission Control System ................................................................... 7-2
Engine
Before starting the engine .............................................................. 2-3
Compartment................................................................................. 6-2
Coolant........................................................................................... 6-8
Coolant temperature gauge .........................................................1-49
If the engine overheats .................................................................. 3-4
Number........................................................................................... 8-2
Oil ................................................................................................... 6-4
Starting........................................................................................... 2-4
Engine Exhaust Can Be Dangerous .................................................. 2-2
F
Fan Speed Control............................................................................1-84
Floor Mat Anchor ..............................................................................1-71
Fog Light
Front.............................................................................................1-56Front Seats
Adjustable front seats..................................................................1-12
Adjustable headrests...................................................................1-13
Adjusting seat forward and rearward ..........................................1-12
Adjusting seatback angle .............................................................1-13
Fuel
Capacity......................................................................................... 9-2
Gauge...........................................................................................1-48
Recommendations......................................................................... 1-2
Fuel Filler Lid
Remote release............................................................................1-72
Fuses................................................................................................6-21
G
General Checks.................................................................................. 6-3
Glove Box..........................................................................................1-66
H
Hazard Warning System ..................................................................1-59
Heating and Cooling Control.............................................................1-80
Heating and Ventilation
Air flow control..............................................................................1-81
Air intake control ..........................................................................1-83
Bi-level heating.............................................................................1-85
Defrosting / Defogging .................................................................1-87
Fan speed control (Blower control).............................................1-84
Temperature control....................................................................1-84