coolant temperature Hyundai Sonata Hybrid 2015 Owner's Manual

Features of your vehicle
42
4
Speedometer
The speedometer indicates the speed of
the vehicle.
The speedometer is calibrated in miles
per hour and/or kilometers per hour.
Engine temperature gauge
This gauge shows the temperature of the
engine coolant when the engine start/stop
button is ON.
Do not continue driving with an overheat-
ed engine. If your vehicle overheats, refer
to “If the engine overheats” in section 6.
WARNING
Never remove the radiator cap
when the engine is hot. The engine
coolant is under pressure and
could cause severe burns. Wait
until the engine is cool before
adding coolant to the reservoir.
OYFH041047NOYFH041043N
CAUTION
If the gauge moves beyond the nor-
mal range area toward the “H” posi-tion, it indicates overheating thatmay damage the engine.

459
Features of your vehicle
If the battery in the Smart Key remoteis weak, the engine may not start when
you push the start/stop button (and the
indicator will flash). Place the smart
key into the smart key holder in the
center console. If the vehicle now
starts nor mally, replace the battery
inside the smart key fob. If the indicator
still flashes, the system may need
repair. Contact an authorized HYUNDAI
dealer for assistance.Low fuel level warning light
This warning light indicates the fuel tank
is nearly empty. When it comes on, you
should add fuel as soon as possible.
Driving with the fuel level warning light on
or with the fuel level below “E” can cause
the engine to misfire and damage the
catalytic converter.
Engine coolant temperature warning light(if equipped)
The warning light illuminates if the tem-
perature of the engine coolant is above
257±4.5°F (125±2.5°C).
Do not continue driving with an overheat-
ed engine. If your vehicle overheats, refer
to “Overheating” in Chapter 6.
Malfunction indicator light(MIL) (check engine light)
This indicator light is part of the Engine
Control System which monitors various
emission control system components. If
this light illuminates while driving, it indi-
cates that a potential malfunction has
been detected somewhere in the emis-
sion control system.
This light will also illuminate when the
engine start/stop button is in the ON
position, and will go out in a few seconds
after the engine is started. If it illuminates
while driving, or does not illuminate when
the engine start/stop button is in the ON
position, take your vehicle to your near-
est authorized HYUNDAI dealer and
have the system checked.
Generally, your vehicle will continue to be
drivable, but have the system checked by
an authorized HYUNDAI dealer promptly.

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.

What to do in an emergency
86
IF THE ENGINE OVERHEATS
If your temperature gauge indicates over-
heating, you experience a loss of power,
or hear loud pinging or knocking, the
engine is probably too hot. If this hap-
pens, you should:
1. Pull off the road and stop as soon as itis safe to do so.
2. Place the shift lever in P (automatic 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 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
coolant leaking from the radiator,
hoses or under the car. (If the air con-
ditioning had been in use, it is normal
for cold water to be draining from it
when you stop.)
5. If the water pump drive belt is broken or engine coolant is leaking out, stop
the engine immediately and call the
nearest authorized HYUNDAI dealer
for assistance. 6. If you cannot find the cause of the
overheating, wait until the engine tem-
perature has returned to normal. Then,
if coolant has been lost, carefully add
coolant to the reservoir to bring the
fluid level in the reservoir up to the
halfway mark.
7. Proceed with caution, keeping alert for further signs of overheating. If over-
heating happens again, call an author-
ized HYUNDAI dealer for assistance.
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.
CAUTION
Serious loss of coolant indicates
there is a leak in the cooling systemand this should be checked as soonas possible by an authorizedHYUNDAI dealer.
WARNING
Do not remove the radiator cap
when the engine is hot. This may
result in coolant being blown out of
the opening and cause serious
burns.

725
Maintenance
Check the condition and connections of
all cooling system hoses and heater
hoses. Replace any swollen or deterio-
rated hoses.
The coolant level should be filled
between F and L marks on the side of the
coolant reservoir when the engine is cool.
If the coolant level is low, add enough
distilled (deionized) water to provide pro-
tection against freezing and corrosion.
Bring the level to F, but do not overfill. If
frequent additions are required, see an
authorized HYUNDAI dealer for a cooling
system inspection.
OYFH071005N
(Continued)
The engine coolant and/or invertercoolant level is influenced by
hybrid system temperature. Before
filling the engine coolant and/or
inverter coolant, turn the hybrid
vehicle off, fill the engine coolant
and/or inverter coolant carefully.
Turn the engine off and wait until it cools down. Use extreme care
when removing the radiator and/or
inverter coolant cap. Wrap a thick
towel around it, and turn it coun-
terclockwise slowly to the first
stop. Step back while the pressure
is released from the cooling sys-
tem. When you are sure all the
pressure has been released, press
down on the cap, using a thick
towel, and continue turning coun-
terclockwise to remove it.
Even if the engine is not operat- ing, do not remove the radiator
and/or inverter coolant cap or the
drain plug while the engine and
radiator are hot. Hot coolant and
steam may still blow out under
pressure, causing serious injury.WARNING
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 the rotating
fan blades. As the engine coolant
temperature decreases, the electric
motor will automatically shut off.
This is a normal condition.

Maintenance
26
7
Recommended engine and inverter
coolant
When adding coolant, use only deion- ized water or soft water for your vehicle
and never mix hard water in the
coolant filled at the factory. An improp-
er coolant mixture can result in serious
malfunction or engine damage.
The engine in your vehicle has aluminum engine parts and must be protected by
an ethylene-glycol-based coolant to pre-
vent corrosion and freezing.
DO NOT USE alcohol or methanol coolant or mix them with the specified
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.
For mixture percentage, refer to the fol-
lowing table.
Changing the coolant
Have engine and inverter coolant
changed by an authorized HYUNDAI
dealer according to the Maintenance
Schedule at the beginning of this section.
WARNING - Radiator cap &
Inverter coolant cap
Do not remove the radiator cap and
/or inverter coolant cap when the
engine and radiator are hot.
Scalding hot coolant and steam
may blow out under pressure caus-
ing serious injury.
WARNING -Coolant
Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
Radiator coolant can severely obscure visibility when sprayed
on the windshield and may cause
loss of vehicle control or damage
to paint and body trim.
CAUTION
Put a thick cloth or fabric aroundthe radiator and/or inverter cap before refilling the coolant in orderto prevent the coolant from over- flowing into engine parts such asthe generator.
5°F (-15°C) 35 65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40
Ambient
Temperature Mixture Percentage (volume)
Antifreeze Water
OYFH071006N-1
OYFH071070N-1
Radiator cap
Inverter coolant cap

Index
4I
Displays, see instrument cluster··················\
·········4-40
Door locks ··················\
··················\
················4-11
Central door lock switch ··················\
··············4-12
Child-protector rear door lock ··················\
········4-14
Drinks holders, see cup holders ··················\
········4-121
Driver's 3-point system with emergency
locking retractor··················\
··················\
······ ·3-18
Driver's air bag ··················\
··················\
·········· ·3-48
Driving at night ··················\
··················\
········· ·5-31
Driving in flooded areas ··················\
················· ·5-32
Driving in the rain ··················\
··················\
······ ·5-32
Driving off-road ··················\
··················\
········· ·5-32
ECO GUIDE gauge ··················\
··················\
···· ·4-43
Economical operation ··················\
··················\
·· ·5-28
Electric chromic mirror (ECM) with HomeLink system· ·4-31
Electric power steering ··················\
··················\
· ·4-29
Electronic stability control (ESC) ··················\
·······5-19
Emergency starting ··················\
··················\
········6-6
Jump starting ··················\
··················\
···········6-6
Push starting ··················\
··················\
············6-7
Emergency while driving ··················\
··················\
6-2
Emission control system ··················\
················· ·7-77
Crankcase emission control system ··················\
··7-77
Evaporative emission control system ··················7-77
Exhaust emission control system · · · · · · · ···············7-78 Engine · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
··················8-2
Engine compartment ··················\
················· ·2-4, 7-2
Engine compartment fuse ··················\
··············· ·7-53
Engine coolant ··················\
··················\
·········· ·7-24
Engine number ··················\
··················\
··········· ·8-7
Engine oil ··················\
··················\
·················7-22
Engine overheats ··················\
··················\
········· ·6-8
Engine start/stop button ··················\
··················\
· ·5-5
Engine temperature gauge ··················\
··············· ·4-42
Engine will not start ··················\
··················\
····· ·6-5
Evaporative emission control system ··················\
···7-77
Exhaust emission control system ··················\
········7-78
Explanation of scheduled maintenance items ···········7-19
Exterior care ··················\
··················\
··············7-71
Flat tire (with spare tire) ··················\
················· ·6-14
Changing tires ··················\
··················\
······· ·6-15
Compact spare tire ··················\
··················\
·· ·6-20
Jack and tools ··················\
··················\
·········6-14
Removing and storing the spare tire ··················\
·6-15
Flat tire (with tire mobility kit) ··················\
··········6-22
Components of the tire mobility kit ··················\
·6-24
T

echnical data ··················\
··················\
·········6-27
Using the tire mobility kit ··················\
·············6-25
Floor mat anchor(s) ··················\
··················\
··· ·4-124
E
F

Index
6I
Immobilizer system··················\
··················\
·······4-7
Indicator symbols on the instrument cluster ··············1-7
Indicators and warnings ··················\
················· ·4-53
Inside rearview mirror ··················\
··················\
· ·4-31
Instrument cluster ··················\
··················\
······· ·4-40
Blue drive mode ··················\
··················\
····· ·4-44
Engine temperature gauge ··················\
············4-42
Fuel gauge ··················\
··················\
············ ·4-43
Hybrid electric vehicle ··················\
··············· ·4-45
Instrument panel illumination ··················\
········4-41
Odometer ··················\
··················\
··············4-41
Speedometer ··················\
··················\
········· ·4-42
Trip computer ··················\
··················\
·········4-44
Vehicle setting ··················\
··················\
······· ·4-51
Warning and indicators ··················\
··············· ·4-53
Instrument panel fuse ··················\
··················\
·· ·7-52
Instrument panel illumination ··················\
············4-41
Instrument panel overview ··················\
·················2-3
Interior care ··················\
··················\
·············· ·7-75
Interior features ··················\
··················\
·········4-121
Aux, USB and iPod
®port ··················\
·········· ·4-124
Clothes hanger ··················\
··················\
····· ·4-123
Cup holder ··················\
··················\
·········· ·4-121
Digital clock ··················\
··················\
·········4-123
Floor mat anchor(s) ··················\
··················\
·4-124
Power outlet ··················\
··················\
·········4-122
Sunvisor ··················\
··················\
··············4-121 Interior light
··················\
··················\
··············4-78
Interior overview ··················\
··················\
········· ·2-2
Inverter coolant ··················\
··················\
········· ·7-24
Jack and tools (with spare tire) ··················\
··········6-14
Jump starting ··················\
··················\
·············· ·6-6
Label Air bag warning label ··················\
················· ·3-62
Tire sidewall labeling ··················\
················· ·7-43
Tire specification and pressure label ··················\
··8-8
Vehicle certification label ··················\
···············8-7
Latch system, see lower anchor system ··················3-33
Light bulbs ··················\
··················\
··············· ·7-61
Lighting ··················\
··················\
··················\
·4-71
Battery saver function ··················\
················ ·4-71
Lower anchor system ··················\
··················\
·· ·3-33
Lubricants and capacities ··················\
················· ·8-5
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