Maintenance Hyundai Sonata 2012 Service Manual

Maintenance30
7Replace the filter according to the
Maintenance Schedule.If the vehicle is operated in extremely
dusty or sandy areas, replace the ele-ment more often than the usual recom-mended intervals. (Refer to “Maintenance under severe usage condi-tions” in this section.)
Filter inspectionThe climate control air filter should be
replaced according to the Maintenance
Schedule. If the vehicle is operated in
severely air-polluted cities or on dusty
rough roads for a long period, it should
be inspected more frequently and
replaced earlier. When you replace the
climate control air filter, replace it per-
forming the following procedure, and be
careful to avoid damaging other compo-
nents.
Filter replacement1. Open the glove box and remove the support strap (1).
CAUTION
 Do not drive with the air cleaner removed; this will result in exces-sive engine wear.
 When removing the air cleaner fil- ter, be careful that dust or dirtdoes not enter the air intake, ordamage may result.
 Use a HYUNDAI genuine part. Use of non-genuine parts could dam-age the air flow sensor.
CLIMATE CONTROL AIR FILTER
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731
Maintenance
2. With the glove box open, remove thestoppers by turning them counter-
clockwise on both sides. 3. Remove the climate control air filter
cover while pressing the lock on the
right of the cover. 4. Replace the climate control air filter.
5. Reassemble in the reverse order of
disassembly.
✽ ✽NOTICEWhen replacing the climate control air
filter install it properly. Otherwise, the
system may produce noise and the effec-
tiveness of the filter may be reduced.
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Maintenance32
7WIPER BLADES Blade inspection✽
✽
NOTICECommercial hot waxes applied by auto-
matic car washes have been known to
make the windshield difficult to clean.
Contamination of either the windshield or
the wiper blades with foreign matter can
reduce the effectiveness of the wind-
shield wipers. Common sources of con-
tamination are insects, tree sap, and hot
wax treatments used by some commer-
cial car washes. If the blades are not wip-
ing properly, clean both the window and
the blades with a good cleaner or mild
detergent, and rinse thoroughly with
clean water.
Blade replacement When the wipers no longer clean ade-
quately, the blades may be worn or
cracked, and require replacement.
1JBA5122
CAUTION
To prevent damage to the wiper
blades, do not use gasoline,kerosene, paint thinner, or other solvents on or near them.
CAUTION
To prevent damage to the wiperarms or other components, do notattempt to move the wipers manual- ly.
CAUTION
The use of a non-specified wiperblade could result in wiper malfunc- tion and failure.

733
Maintenance
Front windshield wiper blade1. Raise the wiper arm.2. Lift up the wiper blade clip. Then pull
down the blade assembly and remove
it. 3. Install the new blade assembly in the
reverse order of removal.
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CAUTION
Do not allow the wiper arm to fallagainst the windshield, since it maychip or crack the windshield.

Maintenance34
7For best battery service Keep the battery securely mounted.
 Keep the battery top clean and dry.
 Keep the terminals and connections
clean, tight, and coated with petroleum
jelly or terminal grease.
 Rinse any spilled electrolyte from the battery immediately with a solution of
water and baking soda.
 If the vehicle is not going to be used for an extended time, disconnect the bat-
tery cables.BATTERY
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WARNING
- Battery dangers
Always read the following
instructions carefully when
handling a battery.
Keep lighted cigarettes and all other flames or sparks
away from the battery.
Hydrogen, a highly com- bustible gas, is always
present in battery cells and
may explode if ignited.
Keep batteries out of the reach of children because
batteries contain highly
corrosive SULFURIC ACID.
Do not allow battery acid to
contact your skin, eyes,
clothing or paint finish.
If any electrolyte gets into your eyes, flush your eyes
with clean water for at least
15 minutes and get immedi-
ate medical attention.
(Continued)
(Continued)
If electrolyte gets on your
skin, thoroughly wash the
contacted area. If you feel a
pain or a burning sensa-
tion, get medical attention
immediately.Wear eye protection whencharging or working near a
battery. Always provide
ventilation when working in
an enclosed space.
An inappropriately disposed battery can be harmful to
the environment and human
health. Dispose the battery
according to your local
law(s) or regulation.
 When lifting a plastic-cased bat- tery, excessive pressure on the
case may cause battery acid to
leak, resulting in personal injury.
Lift with a battery carrier or with
your hands on opposite corners.
 Never attempt to recharge the battery when the battery cables
are connected.
(Continued)
Pb

735
Maintenance
Battery recharging Your vehicle has a maintenance-free,
calcium-based battery.
 If the battery becomes discharged in ashort time (because, for example, the
headlights or interior lights were left on
while the vehicle was not in use),
recharge it by slow charging (trickle)
for 10 hours.
 If the battery gradually discharges because of high electric load while the
vehicle is being used, recharge it at 20-
30A for two hours.
CALIFORNIA
PROPOSI-
TION 65 WARNING
Battery posts, terminals, and relat-
ed accessories contain lead and
lead compounds, chemicals known
to the State of California to cause
cancer, birth defects and reproduc-
tive harm. Batteries also contain
other chemicals known to the State
of California to cause cancer. Wash
hands after handling.
CAUTION
 When you don’t use the vehicle
for a long time in the low temper-ature, remove the battery and store it indoors.
 Always charge the battery fully to prevent the battery case dam-aged in low temperatures.
 If you connect unauthorized elec- tronic devices to the battery, thebattery may be discharged. Neveruse unauthorized devices.
(Continued)
 The electrical ignition system works with high voltage. Never
touch these components with the
engine running or the ignition
switched on.
Failure to follow the above warn-
ings can result in serious bodily
injury or death.

Maintenance36
7
Reset itemsItems should be reset after the battery
has been discharged or the battery has
been disconnected.
 Auto up/down window (See section 4)
 Sunroof (See section 4)
 Trip computer (See section 4)
 Climate control system
(See section 4)
 Clock (See section 4)
 Audio (See section 4)
WARNING
 Before performing maintenance or recharging the battery, turn off
all accessories and stop the
engine.
 The negative battery cable must be removed first and installed
last when the battery is discon-
nected.
 Operation related to the battery should be done in an authorized
HYUNDAI dealer.
WARNING
- Rechargingbattery
When recharging the battery,
observe the following precautions:
 The battery must be removed
from the vehicle and placed in an
area with good ventilation.
 Do not allow cigarettes, sparks, or flame near the battery.
 Watch the battery during charg- ing, and stop or reduce the charg-
ing rate if the battery cells begin
gassing (boiling) violently or if
the temperature of the electrolyte
of any cell exceeds 120°F (49°C).
 Wear eye protection when check- ing the battery during charging.
 Disconnect the battery charger in the following order.
1. Turn off the battery charger main switch.
2. Unhook the negative clamp from the negative battery terminal.
3. Unhook the positive clamp from the positive battery terminal.

737
Maintenance
CAUTION
 Underinflation also results inexcessive wear, poor handlingand reduced fuel economy.Wheel deformation also ispossible. Keep your tire pres-sures at the proper levels. If atire frequently needs refilling,have it checked by an author-ized HYUNDAI dealer.
 Overinflation produces a harsh ride, excessive wear atthe center of the tire tread, anda greater possibility of dam-age from road hazards.
TIRES AND WHEELS Tire care
For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended tire
inflation pressures and stay within
the load limits and weight distribution
recommended for your vehicle.
Recommended cold tire inflation
pressures
All tire pressures (including the
spare) should be checked when the
tires are cold. “Cold Tires” means the
vehicle has not been driven for at
least three hours or driven less than
one mile (1.6 km).
Recommended pressures must be
maintained for the best ride, vehicle
handling, and minimum tire wear.
For recommended inflation pressure,
refer to “Tire and wheels” in section
8. All specifications (sizes and pres-
sures) can be found on a label
attached to the driver’s side center
pillar.
WARNING - Tire underin-
flation
Severe underinflation can lead
to severe heat build-up, causing
blowouts, tread separation and
other tire failures that can result
in the loss of vehicle control
leading to severe injury or
death. This risk is much higher
on hot days and when driving
for long periods at high speeds.
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Maintenance38
7
Checking tire inflation pressure
Check your tires once a month or
more.
Also, check the tire pressure of the
spare tire.How to checkUse a good quality gage to check tire
pressure. You can not tell if your tires
are properly inflated simply by look-
ing at them. Radial tires may look
properly inflated even when they're
underinflated.
Check the tire's inflation pressure
when the tires are cold. - "Cold"
means your vehicle has been sitting
for at least three hours or driven no
more than 1 mile (1.6 km).
WARNING - Tire Inflation
Overinflation or underinflation
can reduce tire life, adversely
affect vehicle handling, and
lead to sudden tire failure. This
could result in loss of vehicle
control and potential injury.
CAUTION - Tire pressure
Always observe the following:
 Check tire pressure when the tires are cold. (After vehiclehas been parked for at leastthree hours or hasn't beendriven more than one mile (1.6km) since startup.)
 Check the pressure of your spare tire each time you checkthe pressure of other tires.
 Never overload your vehicle. Be careful not to overload avehicle luggage rack if yourvehicle is equipped with one.
 Worn, old tires can cause acci- dents. If your tread is badlyworn, or if your tires havebeen damaged, replace them.
CAUTION
 Warm tires normally exceed recommended cold tire pres-sures by 4 to 6 psi (28 to 41kPa). Do not release air fromwarm tires to adjust the pres-sure or the tires will be under-inflated.
 Be sure to reinstall the tire inflation valve caps. Withoutthe valve cap, dirt or moisturecould get into the valve coreand cause air leakage. If avalve cap is missing, install anew one as soon as possible.

739
Maintenance
Remove the valve cap from the tire
valve stem. Press the tire gage firm-
ly onto the valve to get a pressure
measurement. If the cold tire inflation
pressure matches the recommended
pressure on the tire and loading
information label, no further adjust-
ment is necessary. If the pressure is
low, add air until you reach the rec-
ommended amount.
If you overfill the tire, release air by
pushing on the metal stem in the
center of the tire valve. Recheck the
tire pressure with the tire gage. Be
sure to put the valve caps back on
the valve stems. They help prevent
leaks by keeping out dirt and mois-
ture.Tire rotation
To equalize tread wear, it is recom-
mended that the tires be rotated
every 7,500 miles (12,000 km) or
sooner if irregular wear develops.
During rotation, check the tires for
correct balance.
When rotating tires, check for uneven
wear and damage. Abnormal wear is
usually caused by incorrect tire pres-
sure, improper wheel alignment, out-
of-balance wheels, severe braking or
severe cornering. Look for bumps or
bulges in the tread or side of tire.
Replace the tire if you find either of
these conditions. Replace the tire if
fabric or cord is visible. After rotation,
be sure to bring the front and rear tire
pressures to specification and check
lug nut tightness.
WARNING
 Inspect your tires frequently
for proper inflation as well as
wear and damage. Always use
a tire pressure gauge.
 Tires with too much or too little pressure wear unevenly caus-
ing poor handling, loss of vehi-
cle control, and sudden tire
failure leading to accidents,
injuries, and even death. The
recommended cold tire pres-
sure for your vehicle can be
found in this manual and on
the tire label located on the dri-
ver's side center pillar.
 Worn tires can cause acci- dents. Replace tires that are
worn, show uneven wear, or
are damaged.
 Remember to check the pres- sure of your spare tire.
HYUNDAI recommends that
you check the spare every
time you check the pressure
of the other tires on your vehi-
cle.