2015 Hyundai Sonata Hybrid maintenance

4115
Features of your vehicle
Climate control air filter
The climate control air filter installed
behind the glove box filters the dust or
other pollutants that come into the vehi-
cle from the outside through the heating
and air conditioning system. If dust or
other pollutants accumulate in the filter
over a period of time, the air flow from the
air vents may decrease, resulting in
moisture accumulation on the inside of
the windshield even when the outside
(fresh) air position is selected. If this hap-
pens, have the climate control air filter
replaced by an authorized HYUNDAI
dealer.
✽ ✽NOTICE
• Replace the filter according to the
Maintenance Schedule.
If the vehicle is being driven in severe
conditions such as dusty, rough roads,
more frequent climate control air fil-
ter inspections and changes are
required.
• When the air flow rate suddenly decreases, the system should be
checked at an authorized HYUNDAI
dealer.
Checking the amount of air con-
ditioner refrigerant and compres-
sor lubricant
When the amount of refrigerant is low,
the performance of the air conditioning is
reduced. Overfilling also has a negative
influence on the air conditioning system.
Therefore, if abnormal operation is
found, have the system inspected by an
authorized HYUNDAI dealer.
✽ ✽ NOTICE
It is important that the correct type and
amount of oil and refrigerant is used.
Otherwise, damage to the compressor and
abnormal system operation may occur. OMG075033
Outside air
Recirculatedair
Climate control
air filter Blower
Evaporator
coreHeater core
WARNING
The air conditioning system for the
Hybrid vehicle should be serviced
by an authorized HYUNDAI dealer.
The Hybrid air conditioning system
is connected to the high voltage
system and requires special fluids,
tools and service procedures.
Improperly servicing the Hybrid air
conditioning system could result in
electrical shock, serious injury, or
even death.

53
Driving your vehicle
Before entering vehicle
• Be sure that all windows, outside mir-ror(s), and outside lights are clean.
Check the condition of the tires.
Check under the vehicle for any sign of leaks.
Be sure there are no obstacles behind you if you intend to back up.
Necessary inspections
Fluid levels, such as engine oil, engine
coolant, brake fluid, and washer fluid
should be checked on a regular basis,
with the exact interval depending on the
fluid. Further details are provided in sec-
tion 7, “Maintenance”.
BEFORE DRIVING
CALIFORNIA PROPOSI-
TION 65 WARNING
Engine exhaust and a wide variety
of automobile components and
parts, including components found
in the interior furnishings in a vehi-
cle, contain or emit chemicals
known to the State of California to
cause cancer and birth defects and
reproductive harm. In addition, cer-
tain 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.
WARNING
Driving while distracted can result
in a loss of vehicle control, that
may lead to an accident, severe
personal injury, and death. The dri-
ver’s primary responsibility is in
the safe and legal operation of a
vehicle, and use of any handheld
devices, other equipment, or vehi-
cle systems which take the driver’s
eyes, attention and focus away
from the safe operation of a vehicle
or which are not permissible by law
should never be used during oper-
ation of the vehicle.

Driving your vehicle
28
5
Your vehicle's fuel economy depends
mainly on your style of driving, where you
drive and when you drive.
Each of these factors affects how many
miles (kilometers) you can get from a gal-
lon (liter) of fuel. To operate your vehicle
as economically as possible, use the fol-
lowing driving suggestions to help save
money in both fuel and repairs:
Drive smoothly. Accelerate at a moder-
ate rate. Don't make "jack-rabbit" starts
or full-throttle shifts and maintain a
steady cruising speed. Don't race
between stoplights. Try to adjust your
speed to that of the other traffic so you
don't have to change speeds unneces-
sarily. Avoid heavy traffic whenever
possible. Always maintain a safe dis-
tance from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear.
Drive at a moderate speed. The faster you drive, the more fuel your car uses.
Driving at a moderate speed, especial-
ly on the highway, is one of the most
effective ways to reduce fuel consump-
tion. Don't "ride" the brake pedal. This can
increase fuel consumption and also
increase wear on these components.
In addition, driving with your foot rest-
ing on the brake pedal may cause the
brakes to overheat, which reduces
their effectiveness and may lead to
more serious consequences.
Take care of your tires. Keep them inflated to the recommended pressure.
Incorrect inflation, either too much or
too little, results in unnecessary tire
wear. Check the tire pressures at least
once a month.
Be sure that the wheels are aligned correctly. Improper alignment can
result from hitting curbs or driving too
fast over irregular surfaces. Poor align-
ment causes faster tire wear and may
also result in other problems as well as
greater fuel consumption. Keep your car in good condition. For
better fuel economy and reduced
maintenance costs, maintain your car
in accordance with the maintenance
schedule in section 7. If you drive your
car in severe conditions, more frequent
maintenance is required (see section 7
for details).
Keep your car clean. For maximum service, your vehicle should be kept
clean and free of corrosive materials. It
is especially important that mud, dirt,
ice, etc. not be allowed to accumulate
on the underside of the car. This extra
weight can result in increased fuel con-
sumption and also contribute to corro-
sion.
Travel lightly. Don't carry unnecessary weight in your car. Weight reduces fuel
economy.
Don't let the engine idle longer than necessary. If you are waiting (and not
in traffic), turn off your engine and
restart only when you're ready to go.
ECONOMICAL OPERATION

529
Driving your vehicle
Use your air conditioning sparingly.The air conditioning system requires
power so your fuel economy is reduced
when you use it.
Open windows at high speeds can reduce fuel economy. (the air condi-
tioning usually requires less power
than the air drag from open windows.)
Fuel economy is less in crosswinds and headwinds. To help offset some of
this loss, slow down when driving in
these conditions.
Keeping a vehicle in good operating con-
dition is important both for economy and
safety. Therefore, have an authorized
HYUNDAI dealer perform scheduled
inspections and maintenance.
WARNING - HEV system
off during motion
Never turn the HEV system off to
coast down hills or anytime the
vehicle is in motion. The power
steering and power brakes will not
function properly without the HEV
system running. Instead, keep the
HEV system on and downshift to an
appropriate gear for engine braking
effect. In addition, turning off the
ignition while driving could engage
the steering wheel lock resulting in
loss of vehicle steering which
could cause serious injury or
death.

Driving your vehicle
36
5
Use high quality ethylene glycol
coolant
Your vehicle is delivered with high quality
ethylene glycol coolant in the cooling
system. It is the only type of coolant that
should be used because it helps prevent
corrosion in the cooling system, lubri-
cates the water pump and prevents
freezing. Be sure to replace or replenish
your coolant in accordance with the
maintenance schedule in section 7.
Before winter, have your coolant tested to
assure that its freezing point is sufficient
for the temperatures anticipated during
the winter.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the bat-
tery and cables as described in section
7. The level of charge in your battery can
be checked by an authorized HYUNDAI
dealer or a service station.
Change to "winter weight" oil if
necessary
In some climates it is recommended that
a lower viscosity "winter weight" oil be
used during cold weather. See section 8
for recommendations. If you aren't sure
what weight oil you should use, consult
an authorized HYUNDAI dealer.
Check spark plugs and ignition
system
Inspect your spark plugs as described in
section 7 and replace them if necessary.
Also check all ignition wiring and compo-
nents to be sure they are not cracked,
worn or damaged in any way.
WARNING- Tire chains
The use of chains may adversely
affect vehicle handling.
Do not exceed 20 mph (30 km/h) or the chain manufacturer’s rec-
ommended speed limit, whichev-
er is lower.
Drive carefully and avoid bumps, holes, sharp turns, and other
road hazards, which may cause
the vehicle to bounce.
Avoid sharp turns or locked- wheel braking.
CAUTION
Chains that are the wrong size or improperly installed can damageyour vehicle's brake lines, sus-pension, body and wheels.
Stop driving and retighten the chains any time you hear themhitting the vehicle.

7
Engine compartment / 7-2
Maintenance services / 7-3
Owner maintenance / 7-5
Scheduled maintenance service / 7-7
Explanation of scheduled maintenance items / 7-19
Engine oil / 7-22
Inverter coolant / 7-24
Engine coolant / 7-24
Brake fluid / 7-27
Washer fluid / 7-28
Parking brake / 7-28
Air cleaner / 7-29
Climate control air filter / 7-30
Wiper blades / 7-32
Battery (12V) / 7-34
Tires and wheels / 7-37
Fuses / 7-51
Light bulbs / 7-61
Appearance care / 7-71
Emission control system / 7-77
High voltage battery / 7-80
California perchlorate notice / 7-80
Maintenance

Maintenance
27
ENGINE COMPARTMENT
OYFH071001
❈The actual engine room in the vehicle may differ from the illustration. 1. Sub relay box
2. Engine coolant reservoir
3. Windshield washer fluid reservoir
4. Radiator cap
5. Engine oil dipstick
6. Engine oil filler cap
7. Brake fluid reservoir
8. Air cleaner
9. Fuse box
10. Inverter coolant
* : if equipped

MAINTENANCE SERVICES
You should exercise the utmost care to
prevent damage to your vehicle and
injury to yourself whenever performing
any maintenance or inspection proce-
dures.
Should you have any doubts concerning
the inspection or servicing of your vehi-
cle, we strongly recommend that you
have an authorized HYUNDAI dealer
perform this work.
An authorized HYUNDAI dealer has fac-
tory-trained technicians and genuine
HYUNDAI parts to service your vehicle
properly. For expert advice and quality
service, see an authorized HYUNDAI
dealer.
Inadequate, incomplete or insufficient
servicing may result in operational prob-
lems with your vehicle that could lead to
vehicle damage, an accident, or person-
al injury.Owner’s responsibility
✽ ✽NOTICE
Maintenance Service and Record
Retention are the owner's responsibility.
You should retain documents that show
proper maintenance has been performed
on your vehicle in accordance with the
scheduled maintenance service charts
shown on the following pages. You need
this information to establish your compli-
ance with the servicing and maintenance
requirements of your vehicle warranties.
Detailed warranty information is provided
in your Owner’s Handbook & Warranty
Information booklet.
Repairs and adjustments required as a
result of improper maintenance or a lack
of required maintenance are not covered.
We recommend you have your vehicle
maintained and repaired by an author-
ized HYUNDAI dealer. An authorized
HYUNDAI dealer meets HYUNDAI’s high
service quality standards and receives
technical support from HYUNDAI in
order to provide you with a high level of
service satisfaction.
Owner maintenance precautions
Improper or incomplete service may
result in problems. This section gives
instructions only for the maintenance
items that are easy to perform.
As explained earlier in this section, sev-
eral procedures can be done only by an
authorized HYUNDAI dealer with special
tools.
✽ ✽NOTICE
Improper owner maintenance during the
warranty period may affect warranty
coverage. For details, read the separate
Owner’s Handbook & Warranty
Information booklet provided with the
vehicle. If you're unsure about any serv-
icing or maintenance procedure, have it
done by an authorized HYUNDAI dealer.
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Maintenance