2015 Hyundai Sonata heater

7-8
Maintenance
At least twice a year:
• Check radiator, heater and air condi-
tioning hoses for leaks or damage.
• Check windscreen washer spray
and wiper operation. Clean wiper
blades with clean cloth dampened
with washer fluid.
• Check headlamp alignment.
• Check muffler, exhaust pipes,
shields and clamps.
• Check the seat belts for wear and
function.
At least once a year:
• Clean body and door drain holes.
• Lubricate door hinges and bonnet
hinges.
• Lubricate door and bonnet locks
and latches.
• Lubricate door rubber weather
strips.
• Check the air conditioning system.
• Inspect and lubricate automatic
transaxle linkage and controls.
• Clean the battery and terminals.
• Check the brake fluid level.

7-23
7
Maintenance
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
The coolant level should be filled
between F (MAX) and L (MIN) marks
on the side of the coolant reservoir
when the engine is cool.
If the coolant level is low, add enough
distilled (deionized) or soft water.
Bring the level to F (MAX), but do not
overfill.
If frequent additions are required, we
recommend that the system be
inspected by an authorised HYUNDAI
dealer.
Recommended engine coolant
• When adding coolant, use only
deionized water or soft water for
your vehicle and never mix hard
water in the coolant filled at the fac-
tory. An improper coolant mixture
can result in serious malfunction or
engine damage.
• The engine in your vehicle has alu-
minium engine parts and must be
protected by an ethylene-glycol-
based coolant to prevent corrosion
and freezing.
• DO NOT USE alcohol or methanol
coolant or mix them with the spec-
ified coolant.
• Do not use a solution that contains
more than 60% antifreeze or less
than 35% antifreeze, which would
reduce the effectiveness of the
solution.
OLF074006N
The electric motor
(cooling fan) is con-
trolled by engine
coolant temperature,
refrigerant pressure
and vehicle speed. It may some-
times operate even when the
engine is not running. Use
extreme caution when working
near the blades of the cooling
fan so that you are not injured
by a rotating fan blade. As the
engine coolant temperature
decreases, the electric motor
will automatically shut off. This
is a normal condition.
The electric motor (cooling fan)
may operate until you discon-
nect the negative battery cable.
WARNING

7-56
Maintenance
Fuse NameSymbolFuse ratingCircuit Protected
SAFETY
WINDOW LH 25A Driver Safety Power Window Module
P/SEAT PASS 30A Passenger Seat Manual Switch
P/WDW LH 20A Power Window Main Switch, Rear Power Window Module LH
P/WDW RH 25A Power Window Main Switch, Rear Power Window Module RH Passenger Door Module,
Passenger Power Window Switch
DR LOCK 20A Door Lock Relay, Door Unlock Relay
S/HEATER FRT 25A Front Air Ventilation Seat Module, Front Seat Warmer Module
BRAKE SWITCH 10A Stop Lamp Switch, Immobiliser Module Smart Key Control Module
MODULE 8 7.5A BCM, Smart Key Control Module
SAFETY POWER
WINDOW RH 25A Passenger Safety Power Window Module
SMART KEY 15A Smart Key Control Module
BOOT 10A Boot Lid Relay, Fuel Filler Door & Boot Lid Switch
MODULE 7 10A Digital Clock, Driver/Passenger Door Module
Driver’s side fuse panel

7-57
7
Maintenance
Fuse NameSymbolFuse ratingCircuit Protected
INTERIOR LAMP 10A Glove Box Lamp, Ignition Key Ill. & Door Warning Switch, Front Vanity Lamp Switch LH/RH,
Overhead Console Lamp, Room Lamp, Rear Personal Lamp LH/RH, Boot Room Lamp,
Driver/Passenger Smart Key Outside Handle Driver/Passenger Door Lamp
MEMORY 2 7.5A UIP Sensor
P/SEAT
DRV 30A Driver Seat Manual Switch, Driver IMS Module
CURTAIN 10A Rear Curtain Module
CLUSTER 10A Instrument Cluster
MODULE 4 10A Immobiliser Module, Smart Key Control Module
MULTI MEDIA 15A Audio, A/V & Navigation Head Unit
MEMORY 1 10A Driver/passenger Door Module, Instrument Cluster, Digital Clock, Driver IMS Module,
Rain Sensor, Auto Light & Photo Sensor, ICM Relay Box(Outside Mirror Folding/Unfolding
Mirror Relay), A/C Control Module, Rear Curtain Module, Data Link Connector, BCM
S/HEATER RR 25A Rear Seat Warmer Module
SUN ROOF 2 20A Panorama Sunroof Motor
MODULE 9 7.5A Front Air Ventilation Seat Module, Front Seat Warmer Module Rear Seat Warmer Module,
Rear Curtain Module
Driver’s side fuse panel