check engine Hyundai Elantra 2004 Owner's Guide

5VEHICLE MAINTENANCE REQUIREMENTS
8
F060E01A-AATo Timing belt
Inspect all parts related to the timing belt for
damage and deformation. Replace any dam-
aged parts immediately.
F070D01A-AATo Manual transaxle oil
Inspect the manual transaxle oil according to
the maintenance schedule.
NOTE:If the oil level is low, check for possible leaks
before adding oil. Do not overfill.
F070E05A-AAT
o Automatic Transaxle Fluid
The fluid level should be in the "HOT" range of
the dipstick, after the engine and transaxle are
at normal operating temperature. Check the
automatic transaxle fluid level with the engine
running and the transaxle in neutral, with the
parking brake properly applied. Use HYUNDAI
GENUINE ATF, DIAMOND ATF SP-III or SK
ATF SP-III when adding or changing fluid.
F070G02A-AAT
o Brake Fluid
Check brake fluid level in the brake fluid reser-
voir. The level should be between "MIN" and
"MAX" marks on the side of the reservoir. Use
only hydraulic brake fluid conforming to DOT 3
or DOT 4.
F070F01A-AAT
o Brake Hoses and Lines
Visually check for proper installation, chafing,
cracks, deterioration and any leakage. Replace
any deteriorated or damaged parts immedi-
ately.
F070H01A-AAT
o Rear Brake Drums/Linings,
Parking Brake
Check the rear brake drums and linings for
scoring, burning, leaking fluid, broken parts,
and excessive wear. Inspect the parking brake
system including the parking brake lever and
cables. For detailed service procedures, refer
to the Shop Manual.
F070J01A-AATo Brake Pads, Calipers and Rotors
Check the pads for excessive wear, discs for
run out and wear, and calipers for fluid leakage.
F070K01A-AATo Exhaust Pipe and Muffler
Visually inspect the exhaust pipes, muffler and
hangers for cracks, deterioration, or damage.
Start the engine and listen carefully for any
exhaust gas leakage. Tighten connections or
replace parts as necessary.
F060B01A-AAT
o Drive Belts
Inspect all drive belts for evidence of cuts,
cracks, excessive wear or oil saturation and
replace if necessary. Drive belts should be
checked periodically for proper tension and
adjusted as necessary.
F070C01A-AAT
o Engine coolant
The coolant should be changed at the intervals
specified in the maintenance schedule.

5VEHICLE MAINTENANCE REQUIREMENTS
9
F070L01A-AAT
o Suspension Mounting Bolts
Check the suspension connections for loose-
ness or damage. Retighten to the specified
torque.
F070M01A-AAT
o Steering Gear Box, Linkage & Boots/
Lower arm Ball Joint
With the vehicle stopped and engine off, check
for excessive free-play in the steering wheel.
Check the linkage for bends or damage. Check
the dust boots and ball joints for deterioration,
cracks, or damage. Replace any damaged
parts.
F070N01A-AATo Power Steering Pump, Belt and Hoses
Check the power steering pump and hoses for
leakage and damage. Replace any damaged or
leaking parts immediately. Inspect the power
steering belt for evidence of cuts, cracks, ex-
cessive wear, oiliness and proper tension.
Replace or adjust it if necessary.
F070P01A-AAT
o Driveshafts and Boots
Check the drive shafts, boots and clamps for
cracks, deterioration, or damage. Replace any
damaged parts and, if necessary, repack the
grease.
F070Q01A-AAT
o Air Conditioning Refrigerant
Check the air conditioning lines and connec-
tions for leakage and damage. Check air con-
ditioning performance according to the relevant
shop manual if necessary.
F070R01A-AAT
o Cylinder Head Cover Gasket
(2.0L SULEV Only)
NOTE:
Check the contact surface between the
head cover and head for oil leaks and re-
place the gasket with a new one, if neces-
sary.
Remove the upper timing belt cover and
check the engine parts including the cam
cap for oil leaks.
F070S01A-AAT
o Oil Pan Liquid Gasket
(2.0L SULEV Only)
NOTE:
Check the oil mounted surface for oil leaks,
if necessary. After removing the oil pan,
apply the gasket with a new one and rein-
stall the oil pan.

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
4CHECKING THE ENGINE OIL
G030A01A-AAT
Engine oil is essential to the performance and
service of the engine. It is suggested that you
check the oil level at least once a week in normal
use and more often if you are on a trip or driving
in severe conditions.
G030C01A-AAT
To Check the Oil Level
Before checking the oil, warm up the engine to
the normal operating temperature and be sure
your car is parked on level ground. Turn the
engine off.
Wait a minute, then remove the dipstick, wipe it
off, fully reinsert the dipstick and withdraw it
again. Then note the highest level the oil has
reached on the dipstick. It should be between
the upper ("FULL") and lower ("LOW") range.
G030B02E-AAT
Recommended Oil
SH(API) or GF-I (ILSAC) and ABOVE multi-
grade and fuel efficient oil is recommended.
G030C01E-A G030B02E

6DO-IT-YOURSELF MAINTENANCE
5
HXDFL009
CHANGING THE OIL AND FILTER
!
If the oil level is close to or below the "LOW"
mark, add oil until it reaches the "FULL" mark.
To add oil:
1. Remove the oil filler cap by turning it counter-
clockwise.
2. Add oil, then check the level again. Do not
overfill.
3. Replace the cap by turning it clockwise.
The distance between the "FULL" and "LOW"
marks is equal to about 1 quart of oil.
G040A02E-AAT2. Open the hood and remove the engine oil
filler cap.
3. Slide underneath the car and loosen the
drain plug by turning it counterclockwise with
a wrench of the proper size. Be sure that a
drain pan is in position to catch the oil as it
drains out, then remove the drain plug.
WARNING:Be very careful when draining the engine oil
as it may be hot enough to burn you!
G030D01A-AAT
Adding Oil
The engine oil and filter should be changed at
those intervals specified in the maintenance
schedule in Section 5. If the car is being driven
in severe conditions, more frequent oil and filter
changes are required.
The procedure for changing the oil and filter is
as follows:
1. Park the car on level ground and set the
parking brake. Start the engine and let it
warm up until the needle on the coolant
temperature gauge moves above the lowest
mark. Turn the engine off and place the gear
selector lever in "P" (automatic) or reverse
gear (manual transaxle). Set the parking
brake.4. When the oil has stopped draining, replace
the drain plug using a new washer and
retighten by turning it clockwise.
Drain plug tightening torque:
4.0 ~ 4.5 kgf.m
5. Remove the oil filter. You should be able to
unscrew the filter with your hands. (If your
hands are slippery, try to use a cloth be-
tween your hands and the filter to give
yourself a better grip.) A certain amount of oil
will come out when you remove the filter, so
be sure to have your drain pan in place
underneath it.
6. Install a new oil filter in accordance with the
instructions on the carton or on the filter itself.
Do not over-tighten.
G040A03E
Oil filler cap
Drain plug
Oil filler

6DO-IT-YOURSELF MAINTENANCE
6CHECKING AND CHANGING THE
ENGINE COOLANT
!!
G050A01A-AAT
WARNING:Do not remove the radiator cap when the
engine is hot. When the engine is hot, the
engine coolant is under pressure and may
erupt through the opening if the cap is
removed. You could be seriously burned if
you do not observe this precaution. Do not
remove the radiator cap until the radiator is
cool to the touch. Oil filter tightening torque :
1.2 ~ 1.6 kgf.m
Be sure that the mounting surface on the
engine is clean and that the old gasket is
removed completely. Lubricate the new
gasket on the filter with clean engine oil
before installation.
7. Refill the crankcase with the recommended
engine oil. Refer to the specification in chap-
ter 9 for engine oil capacity.
8. Start the engine and check to be sure no oil
is leaking from the drain plug or oil filter.
9. Shut off the engine and recheck the oil level.
NOTE:Always dispose of used engine oil in an
environmentally acceptable manner. It is
suggested that it be placed in a sealed
container and taken to a service station for
reclamation. Do not pour the oil on the
ground or put it into the household trash.
PROPOSITION 65 WARNING:Used engine oil may cause irritation or
cancer of the skin if left in contact with the
skin for prolonged periods of time. Used
engine oil contains chemicals that have
caused cancer in laboratory animals. Al-
ways protect your skin by washing your
hands thoroughly with soap and warm
water as soon as possible after handling
used oil.

6DO-IT-YOURSELF MAINTENANCE
7
G050D01E
Ambient
temperature
°F (°C)
-5 (15)
-13 (-25)
-31 (-35)
-49 (-45)
65%
60%
50%
40% 35%
40%
50%
60%Water Antifreeze
solution Engine Coolant concentration
G050C01A-AAT
To Check the Coolant Level
The coolant level can be seen on the side of the
plastic coolant reservoir. The level of the cool-
ant should be between the "LOW" and "FULL"
lines on the reservoir when the engine is cold.
If the level is below the "LOW" mark, add engine
coolant to bring it up between "LOW" and "FULL".
If the level is low, inspect for coolant leaks and
recheck the fluid level frequently. If the level
drops again, visit your Hyundai dealer for an
inspection and diagnosis of the reason.
G050B01A-AAT
Recommended Engine Coolant
Use a high quality ethylene-glycol coolant in a
50/50 mix with water. The engine coolant should
be compatible with aluminum engine parts.
Additional corrosion inhibitors or additives should
not be used. The cooling system must be
maintained with the correct concentration and
type of engine coolant to prevent freezing and
corrosion. Never allow the concentration of
antifreeze to exceed the 60% level or go below
the 35% level, or damage to the cooling system
may result. For proper concentration when
adding or replacing the engine coolant, refer to
the following table.
G050B01E

6DO-IT-YOURSELF MAINTENANCE
8
G050D02A-AAT
To Change the Engine Coolant
The engine coolant should be changed at those
intervals specified in the vehicle maintenance
schedule in Section 5.
CAUTION:Engine coolant can damage the finish of
your car. If you spill engine coolant on the
car, wash it off thoroughly with clean water.
1. Park the car on level ground, set the park-
ing brake and remove the radiator cap when
cool.
2. Be sure your drain receptacle is in place.
Open the drain cock on the radiator. Allow all
the engine coolant to drain from the cooling
system, then securely close the drain cock.
3. Check Section 9 for the capacity of the
cooling system in your car. Then, following
the manufacturer's directions on the engine
coolant container, add the appropriate quan-
tity of coolant to the radiator.
!
5. Start the engine, top off the radiator with
water and then add engine coolant to the
reservoir until the level is between "LOW"
and "FULL".
6. Replace the radiator and reservoir caps and
check to be sure the drain cocks are fully
closed and not leaking. 4. Turn the radiator cap counterclockwise with-
out pressing down on it, until it stops. This
relieves any pressure remaining in the cool-
ing system. And remove the radiator cap by
pushing down and turning counterclock-
wise.
Now fill the radiator with clean demineralized
or distilled water. Continue to add clean
demineralized or distilled water in small quan-
tities until the fluid level stays up in the
radiator neck.
G050D03E G050D04E

6DO-IT-YOURSELF MAINTENANCE
10
G060C01S-AAT
Changing the Spark Plugs
You will find it easier to change spark plugs if the
engine is cold. Always change one spark plug
at a time. This helps avoid getting the wires
mixed up.
1. Remove the center cover on the engine
rocker cover.
2. Using a clean cloth, remove any dirt that has
accumulated around the spark plug so it
cannot fall into the cylinder when the spark
plug is removed.
3. To remove the spark plug cable, pull straight
up on the insulated connector, not the cable.
Pulling on the cable may damage the carbon
core conductor.
HGK256
!WARNING:It is recommended that the engine be cool
or cold when changing the spark plugs. If
the engine is hot, you could burn yourself
on the insulated connector, the spark plug
or the engine itself.
4. When preparing to remove the old spark
plug, guide the socket down over the spark
plug, being careful not to damage the ce-
ramic insulator.
5. To remove the spark plug, turn the wrench
handle in a counterclockwise direction.
6. To replace the new spark plug, guide the
socket down over the spark plug, being
careful not to damage the ceramic insulator.
NOTE:Spark plugs should be tightened firmly.
Over-tightening can damage the threads in
the aluminum cylinder head. Leaving them
too loose can cause the spark plugs to get
very hot and possibly result in damage to
the engine.
7. Replace the cable by pushing the insulated
connector directly down onto the electrode.
Check to be sure it has snapped into place
and can't fall off.
HGK257
HGK258