2011 Hyundai Sonata Hybrid battery

Driving your vehicle
8 5
✽
✽
NOTICE
• If the battery is weak or the smart key
does not work correctly, you can start
the engine by inserting the smart key
into the smart key holder. To eject the
smart key from the smart key holder,
press the smart key inward past the
detent and then pull the key outward.
• When the stop lamp fuse is blown, you
can't start the engine normally.
Replace the fuse with a new one. If you
are not able to replace the fuse, you
can start the engine by pressing the
engine start/stop button for 10 seconds
with the engine start/stop button in the
ACC mode. Always depress the brake
pedal before starting the engine.
CAUTION
Do not press the HEV system
start/stop button for more than 5
seconds except when the stop
lamp fuse is disconnected.
When you eject the smart key
from the smart key holder, press
the smart key inward and pull it
out. If you pull out the smart key
forcibly without first pushing the
smart key, the smart key holder
may be damaged and will not
operate normally.
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515
Driving your vehicle
In the event of brake failure
If service brakes fail to operate while the
vehicle is in motion, you can make an
emergency stop with the parking brake.
The stopping distance, however, will be
much greater than normal.
✽ ✽
NOTICE
1) When you apply the brake repeatedly,
you may hear the sound operating the
electric hydraulic pump or motor
operation. It is normal sound.
2) When you apply the pedal as follows,
the abnormal brake feeling may occur,
however it is normal condition.
- When you apply the pedal quickly
- When you apply the pedal continu-
ously and repeatedly
- While braking, when the ABS oper-
ated
(Continued)
Wet brakes may impair the vehi-
cle’s ability to safely slow down;
the vehicle may also pull to one
side when the brakes are applied.
Applying the brakes lightly will
indicate whether they have been
affected in this way. Always test
your brakes in this fashion after
driving through deep water. To
dry the brakes, apply them lightly
while maintaining a safe forward
speed until brake performance
returns to normal.
Do not turn off the Hybrid system
while going down a hill. The brake
booster may not work sufficiently
and the braking distance may be
longer.
If the brake pedal does not return
to its normal position when
released, there may be a malfunc-
tion in the brake system. Take
your vehicle to an authorized
HYUNDAI dealer and have the
system checked.
(Continued)(Continued)
To avoid applying the brakes do
not get too close to the vehicle in
front of you and try to avoid
going down steep roads or sharp
corning if the power assisted
brakes are not functioning nor-
mally. The vehicle will stop but
the braking distance may be
longer.
WARNING- Parking brake
Applying the parking brake while
the vehicle is moving at normal
speeds can cause a sudden loss of
control of the vehicle. If you must
use the parking brake to stop the
vehicle, use great caution in apply-
ing the brake.
CAUTION
If the driver’s door is not firmly
closed for a long time, the auxiliary
battery may be discharged because
the brake controller keeps the
standby operation. To prevent the
battery discharge, close the door
certainly.

519
Driving your vehicle
✽ ✽
NOTICE
When you jump start your vehicle
because of a drained battery, the engine
may not run as smoothly and the ABS
warning light may turn on at the same
time. This happens because of the low
battery voltage. It does not mean your
ABS is malfunctioning.
• Do not pump your brakes!
• Have the battery recharged before
driving the vehicle.
Electronic stability control (ESC)
The Electronic Stability control (ESC)
system is designed to stabilize the vehicle
during cornering maneuvers. ESC checks
where you are steering and where the
vehicle is actually going. ESC applies the
brakes at individual wheels and
intervenes in the engine management
system to stabilize the vehicle.
W-78
CAUTION
If the ABS warning light is on and
stays on, you may have a problem
with the ABS. In this case, howev-
er, your regular brakes will work
normally.
The ABS warning light will stay on
for approximately 3 seconds after
the engine start/stop button is ON.
During that time, the ABS will go
through self-diagnosis and the
light will go off if everything is nor-
mal. If the light stays on, you may
have a problem with your ABS.
Contact an authorized HYUNDAI
dealer as soon as possible.
CAUTION
When you drive on a road having
poor traction, such as an icy road,
and operate your brakes continu-
ously, the ABS will be active con-
tinuously and the ABS warning
light may illuminate. Pull your car
over to a safe place and stop the
engine.
Restart the engine. If the ABS
warning light is off, then your
ABS system is normal.
Otherwise, you may have a prob-
lem with the ABS. Contact an
authorized HYUNDAI dealer as
soon as possible.
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Driving your vehicle
Good braking practices
Check to be sure the parking brake is
not engaged and that the parking brake
indicator light is out before driving away. Driving through water may get the
brakes wet. They can also get wet when
the car is washed. Wet brakes can be
dangerous! Your car will not stop as
quickly if the brakes are wet. Wet brakes
may cause the car to pull to one side.
To dry the brakes, apply the brakes light-
ly until the braking action returns to nor-
mal, taking care to keep the car under
control at all times. If the braking action
does not return to normal, stop as soon
as it is safe to do so and call an author-
ized HYUNDAI dealer for assistance.
Don't coast down hills with the car out of
gear. This is extremely hazardous. Keep
the car in gear at all times, use the
brakes to slow down, then shift to a
lower gear so that engine braking will
help you maintain a safe speed.
Don't "ride" the brake pedal. Resting
your foot on the brake pedal while driv-
ing can be dangerous because it can
result in the brakes overheating and los-
ing their effectiveness. It also increases
the wear of the brake components.
If a tire goes flat while you are driving,
apply the brakes gently and keep the car
pointed straight ahead while you slow
down. When you are moving slowly
enough for it to be safe to do so, pull off
the road and stop in a safe place. If your vehicle is equipped with an auto-
matic transaxle, don't let your vehicle
creep forward. To avoid creeping for-
ward, keep your foot firmly on the brake
pedal when the vehicle is stopped.
Use caution when parking on a hill.
Firmly engage the parking brake and
place the shift lever in P position. If your
vehicle is facing downhill, turn the front
wheels into the curb to help keep the
vehicle from rolling. If your vehicle is fac-
ing uphill, turn the front wheels away
from the curb to help keep the vehicle
from rolling. If there is no curb or if it is
required by other conditions to keep the
vehicle from rolling, block the wheels.
Under some conditions your parking
brake can freeze in the engaged posi-
tion. This is most likely to happen when
there is an accumulation of snow or ice
around or near the rear brakes or if the
brakes are wet. If there is a risk that the
parking brake may freeze, apply it only
temporarily while you put the gear
selector lever in P positionand block
the rear wheels so the vehicle cannot
roll. Then release the parking brake.
Do not hold the vehicle on the upgrade
with the accelerator pedal. This can
cause the transaxle to overheat. Always
use the brake pedal or parking brake.
WARNING
Whenever you leave or park your
vehicle, always firmly set the
parking brake as far as possible
and fully engage the vehicle's
transaxle into the P (Park) posi-
tion. If the parking brake is not
fully engaged, the vehicle may
move inadvertently and injure
yourself and others.
All vehicles should always have
the parking brake fully engaged
when parking to avoid inadver-
tent movement of the vehicle
which can injure occupants or
pedestrians.
CAUTION
Do not depress the brake pedal con-
tinuously without READY status. The
battery may be discharged.

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 damage
your vehicle's brake lines, sus-
pension, body and wheels.
Stop driving and retighten the
chains any time you hear them
hitting the vehicle.

63
What to do in an emergency
2. When the vehicle is stopped, turn on
your emergency hazard flashers, set
the parking brake and put the transaxle
in P (automatic transaxle).
3. Have all passengers get out of the car.
Be sure they all get out on the side of
the car that is away from traffic.
4. When changing a flat tire, follow the
instruction provided later in this sec-
tion.
If vehicle stalls while driving
1. Reduce your speed gradually, keeping
a straight line. Move cautiously off the
road to a safe place.
2. Turn on your emergency flashers.
3. Try to get vehicle moving in drive
again. If your vehicle will not more,
contact an authorized HYUNDAI deal-
er or seek other qualified assistance.1. If your vehicle has an automatic
transaxle, be sure the shift lever is in N
(Neutral) or P (Park) and the emer-
gency brake is set.
2. Check the battery connections to be
sure they are clean and tight.
3. Turn on the interior light. If the light
dims or goes out when you operate the
starter, the battery is discharged.
4. Do not push or pull the vehicle to start
it. See instructions for "Jump starting".
If engine turns over normally but
does not start
1. Check fuel level.
2. With the engine start/stop button in
the LOCK position, check all connec-
tors at ignition coils and spark plugs.
Reconnect any that may be discon-
nected or loose.
3. If the engine still does not start, call an
authorized HYUNDAI dealer or seek
other qualified assistance.
IF THE VEHICLE WILL NOT START
WARNING
If the vehicle will not more, do not
push or pull the vehicle to start it.
This could result in a collision or
cause other damage. In addition,
push or pull starting may cause the
catalytic converter to be over-
loaded and create a fire hazard.

What to do in an emergency
4 6
EMERGENCY STARTING
Connect cables in numerical order and
disconnect in reverse order.
Jump starting
Jump starting can be dangerous if done
incorrectly. Therefore, to avoid harm to
yourself or damage to your vehicle or
battery, follow the jump starting proce-
dures. If in doubt, we strongly recom-
mend that you have a competent techni-
cian or towing service jump start your
vehicle.
CAUTION
Use only a 12-volt jumper system.
You can damage a 12-volt starting
motor, ignition system, and other
electrical parts beyond repair by
use of a 24-volt power supply (either
two 12-volt batteries in series or a
24-volt motor generator set).
WARNING- Battery
• Keep all flames or sparks away
from the battery. The battery pro-
duces hydrogen gas which may
explode if exposed to flame or
sparks.
If these instructions are not fol-
lowed exactly, serious personal
injury and damage to the vehicle
may occur! If you are not sure
how to follow this procedure,
seek qualified assistance.
Automobile batteries contain sul-
furic acid. This is poisonous and
highly corrosive. When jump
starting, wear protective glasses
and be careful not to get acid on
yourself, your clothing or on the
car.
Do not attempt to jump start the
vehicle if the discharged battery
is frozen or if the electrolyte level
is low; the battery may rupture or
explode.
WARNING- Battery
Never attempt to check the elec-
trolyte level of the battery as this
may cause the battery to rupture or
explode causing serious injury.
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What to do in an emergency
Jump starting procedure
1. Open the cover of battery in trunk room.
2. Make sure the booster battery is 12-
volt and that its negative terminal is
grounded.
3. If the booster battery is in another vehi-
cle, do not allow the vehicles to touch.
4. Turn off all unnecessary electrical loads.5. Connect the jumper cables in the exact
sequence shown in the illustration.
First connect one end of a jumper
cable to the positive terminal of the
discharged battery (1), then connect
the other end to the positive terminal
on the booster battery (2). Proceed to
connect one end of the other jumper
cable to the negative terminal of the
booster battery (3), then the other end
to a solid, stationary, metallic point (for
example, the engine lifting bracket)
away from the battery (4). Do not con-
nect it to or near any part that moves
when the engine is cranked.
Do not allow the jumper cables to con-
tact anything except the correct battery
terminals or the correct ground. Do not
lean over the battery when making
connections.6. Start the engine of the vehicle with the
booster battery and let it run at 2,000
rpm, then start the engine of the vehi-
cle with the discharged battery.
If the cause of your battery discharging is
not apparent, you should have your vehi-
cle checked by an authorized HYUNDAI
dealer.
CAUTION- Battery cables
Do not connect the jumper cable
from the negative terminal of the
booster battery to the negative ter-
minal of the discharged battery.
This can cause the discharged bat-
tery to overheat and crack, releas-
ing battery acid.