2021 HYUNDAI TUCSON HYBRID battery

Driving your vehicle
6-6
Key ignition switch positions
Switch
Position Action
Notes
LOCK To turn the ignition switch to the LOCK
position, push the key in at the ACC
position and turn the key towards the
LOCK position.
The ignition key can be removed in
the LOCK position.
ACC Some electrical accessories are
usable. The steering wheel unlocks.
If difficulty is experienced turning the
ignition switch to the ACC position,
turn the key while turning the steering
wheel right and left to release.
ON This is the normal key position when
the engine has started. All features
and accessories are usable.
The warning lights can be checked
when you turn the ignition switch
from ACC to ON. Do not leave the ignition switch in the
ON position when the engine is not
running to prevent the battery from
discharging.
START To start the engine, turn the ignition
switch to the START position. The
switch returns to the ON position
when you let go of the key. The engine will crank until you release
the key.

06
6-9
Engine Stop/Start button positions
Button PositionAction Notice
OFF To turn off the engine, press the
Engine Start/Stop button with
shift button in P (Park). If the steering wheel is not locked
properly when you open the
driver’s door, the warning chime
will sound.
ACC Press the Engine Start/Stop button
when the button is in the OFF
position without depressing the
brake pedal.
Some electrical accessories are
usable.
The steering wheel unlocks. If you leave the Engine Start/ Stop
button in the ACC position for
more than one hour, the battery
power will turn off automatically
to prevent the battery from
discharging.
If the steering wheel doesn’t
unlock properly, the Engine Start/
Stop button will not work. Press
the Engine Start/Stop button while
turning the steering wheel right
and left to release tension.
ON Press the Engine Start/Stop button
while it is in the ACC position
without depressing the brake
pedal.
The warning lights can be checked
before the engine is started. Do not leave the Engine Start/ Stop
button in the ON position when the
engine is not running to prevent
the battery from discharging.
START To start the engine, depress the
brake pedal and press the Engine
Start/Stop button with the shift
button in the P (Park) or in the N
(Neutral) position.
For your safety, start the engine
with the shift button in the P (Park)
position. If you press the Engine Start/ Stop
button without depressing the
brake pedal, the engine does not
start and the Engine Start/ Stop
button changes as follows:
OFF → ACC → ON → OFF or ACC

06
6-11
NOTICE
To prevent damage to the vehicle:
Do not press the Engine Start/Stop
button for more than 10 seconds except
when the stop lamp fuse is blown.
When the stop lamp fuse is blown,
you cannot normally start the hybrid
system. Replace the fuse with a new
one. If you are not able to replace
the fuse, you can start the vehicle by
pressing and holding the Engine Start/
Stop button for 10 seconds with the
Engine Start/Stop button in the ACC
position.
For your safety always depress the
brake pedal before starting the vehicle.
ONX4060002
Information
If the smart key battery is weak or the
smart key does not work correctly, you
can start the vehicle by pressing the
Engine Start/Stop button with the smart
key in the direction of the picture above.
Turning off the engine
1. Stop the vehicle and depress the
brake pedal fully.
2.
Make sur

e the shift button is in
P(Park).
3.
Press the E

ngine Start/Stop button
to the OFF position and apply the
parking brake.
Auto shut-off system (if equipped)
To prevent accidents caused by carbon
dioxide poisoning, the engine is turned
off automatically 60 minutes later when
the following conditions are satisfied.
The timer appears on the instrument
cluster 30 minutes before it turns off
automatically.
Operating conditions
• The driver does not fasten a seat belt
• No one in the passenger's seat
• Stop the vehicle and the speed is
under 1.86mph and the gear shift is
in P
• While the brake or accelerator is not
working
• When AVN update is performing
Cluster timer reset conditions
• Release the accelerator or brake after
completing operation
• Press the OK button on the steering
wheel while the timer appears on the
instrument cluster
Off conditions
• The driver fastened the seat belt
• A passenger is in the pasenger's seat
• Driving over 1.86mph
• Shifting the gear in R, N or D
CAUTION
Please do not leave a passenger or a pet
in the vehicle since the air conditioning
system stops when the engine is off.

Driving your vehicle
6-16
5. When the message ‘Vehicle will stay in
(N). Change gear to cancel’ (or ‘N will
stay engaged when the vehicle is Off’)
appears on the cluster LCD display,
press the Engine Start/Stop button
while depressing the brake pedal.
However, if you open the driver’s or
front passenger’s door, the gear will
automatically shift to P (Park) and the
Engine Start/ Stop button will change to
the OFF position.
When the battery is discharged:
You cannot shift the shift button, when
the battery is discharged.
In emergencies, do the following to
move the shift button to N (Neutral) on a
level ground.
1.
Connect the batt

ery cables from
another vehicle or from another
battery.
For more details, refer to “Jump
Starting” in chapter 8.
2.
Release the parking br

ake with the
Engine Start/Stop button in the ON
position.
3.
Shift the gear to the N(N

eutral)
position refer to the “Stay in Neutral
when vehicle is Off” in this chapter.
Parking
Always come to a complete stop and
continue to depress the brake pedal.
Move the shift button into the P (Park)
position, apply the parking brake, and
place the ignition switch in the LOCK/
OFF position. Take the Key with you
when exiting the vehicle.
• The gear is shifted to P (Park) position
automatically for safety under the
following conditions.
- When the driver un

fasten the seat
belt and open the driver’s door in
the “Stay in Neutral when vehicle is
Off” condition or in the ignition ON
- When turn off the engine with R (R

everse) / D (Drive) or N (Neutral)
position
This is supplemental function for safety.
Always check the P (Park) position is
shifted.
WARNING
When you stay in the vehicle with
the engine running, be careful not to
depress the accelerator pedal for a long
period of time. The engine or exhaust
system may overheat and start a fire.
The exhaust gas and the exhaust system
are very hot. Keep away from the
exhaust system components.
Do not stop or park over flammable
materials, such as dry grass, paper or
leaves. They may ignite and cause a fire.

06
6-21
Power brakes
Your vehicle has power-assisted brakes
that adjust automatically through normal
usage.
If the vehicle is not in the ready (
)
mode or the vehicle is turned off while
driving, the power assist for the brakes
will not work. You can still stop your
vehicle by applying greater force to the
brake pedal than typical. The stopping
distance, however, will be longer than
with power brakes.
When the vehicle is not in the ready
(
) mode, the reserve brake power is
partially depleted each time the brake
pedal is applied. Do not pump the brake
pedal when the power assist has been
interrupted.
WARNING
Take the following precautions:
• Do not drive with your foot resting
on the brake pedal. This will create
abnormal high brake temperatures,
excessive brake lining and pad wear,
and increased stopping distances.
• When descending down a long
or steep hill, downshift to a lower
gear in order to control your
speed without using the brake
pedal excessively. Applying the
brakes continuously will cause
the brakes to overheat and could
result in a temporary loss of braking
performance.
• Wet brakes may impair the vehicle'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, lightly tap the brake pedal to
heat up the brakes while maintaining
a safe forward speed until brake
performance returns to normal.
Avoid driving at high speeds until the
brakes function correctly.
NOTICE
• Do not continue depressing the
brake pedal if the "" indicator is
OFF. The battery may be discharged.
• Noise and vibration generated
during braking is normal.
• Under normal operation, electric
brake pump noise and motor
vibration may occur temporarily in
below cases.
-When the pedal is depressed
suddenly

.
- When the pedal is repea

tedly
depressed in short intervals.
- When the ABS function is activa

ted
while braking.
BrAking system

06
6-23
Releasing the parking brake
ONX4E060026
To release EPB (Electronic Parking
Brake):
• Place the ignition switch in the ON
position.
• Depress the brake pedal.
• Press the EPB switch.
Make sure the Parking Brake Warning
Light goes off.
To release EPB (Electronic Parking Brake)
automatically:
• Gear in P (Park)
With the engine running depress the
brake pedal and shift out of P (Park) to R
(Reverse) or D (Drive).
• Gear in N (Neutral)
With the engine running depress the
brake pedal and shift out of N (Neutral)
to R (Reverse) or D (Drive).
• Satisfy the following conditions
1.
Ensur

e seat belts are fastened and the
doors, hood and liftgate are closed.
2.
With the engine running, depress the
br

ake pedal and shift out of P (Park) to
R (Reverse), D (Drive) or Manual shift
mode.
3.
Depress the acceler

ator pedal.
Make sure the Parking Brake warning
light goes off.
Information
• For your safety, you can engage EPB
even though the ignition switch is in the
OFF position (only if battery power is
available), but you cannot release it.
• For your safety, depress the brake
pedal and release the parking brake
manually with the EPB switch when
you drive downhill or when backing up
the vehicle.
NOTICE
• If the parking brake warning light
is still on even though the EPB has
been released, we recommend that
you have the system checked by an
authorized HYUNDAI dealer.
• Do not drive your vehicle with EPB
applied. It may cause excessive brake
pad and brake rotor wear.

06
6-31
WARNING
If the ABS warning light () is on and
stays on, you may have a problem with
the ABS. Your power brakes will work
normally. To reduce the risk of serious
injury or death, contact your HYUNDAI
dealer as soon as possible.
NOTICE
When you drive on a road having poor
traction, such as an icy road, and apply
your brakes continuously, the ABS will
be active continuously and the ABS
warning light (
) may illuminate. Pull
your vehicle over to a safe place and
turn the vehicle off.
Restart the vehicle. If the ABS warning
light is off, then your ABS system is
normal.
Otherwise, you may have a problem
with your ABS system. We recommend
that you contact an authorized
HYUNDAI dealer as soon as possible.
Information
When you jump start your vehicle because
of a drained battery, 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. Have the battery
recharged before driving the vehicle.
Electronic Stability Control (ESC)
ONX4060011
Electronic Stability Control system helps
to stabilize the vehicle during cornering
maneuvers.
ESC checks where you are steering and
where the vehicle is actually going. ESC
applies braking pressure to any one of
the vehicle's brakes and intervenes in the
engine management system to assist the
driver with keeping the vehicle on the
intended path. It is not a substitute for
safe driving practices. Always adjust your
speed and driving to the road conditions.
WARNING
Never drive too fast for the road
conditions when cornering. The ESC
system will not prevent accidents.
Excessive speed in turns, abrupt
maneuvers, and hydroplaning on wet
surfaces can result in severe accidents.

06
6-57
Winter precautions
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, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 9. 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 temperatures affect battery
performance. Inspect the battery and
cables, as specified in chapter 9. The
battery charging level can be checked
by an authorized HYUNDAI dealer or in a
service station.
Change to “winter weight” oil if
necessary
In some regions during winter, it is
recommended to use the “winter
weight” oil with lower viscosity In
addition, replace the engine oil and filter
if it is close to the next maintenance
interval. Fresh engine oil ensures
optimum engine operation during the
winter months. For further information,
refer to chapter 2. When you are not
sure about a type of winter weight oil,
we recommend that you consult an
authorized HYUNDAI dealer.Check spark plugs and ignition system
Inspect the spark plugs, as specified in
chapter 9. If necessary, replace them.
Also check all ignition wirings and
components for any cracks, wear-out,
and damage.
To prevent locks from freezing
To prevent the locks from being frozen,
spray approved de-icing fluid or glycerin
into key holes. When a lock opening is
already covered with ice, spray approved
de-icing fluid over the ice to remove it.
When an internal part of a lock freezes,
try to thaw it with a heated key. Carefully
use the heated key to avoid an injury.
Use approved window washer anti-
freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as specified
on the window washer container.
Window washer anti-freeze solution is
available from an authorized HYUNDAI
dealer, and most vehicle accessory
outlets. Do not use engine coolant or
other types of anti-freeze solution, to
prevent any damage to the vehicle paint.