2021 HYUNDAI TUCSON HYBRID Idle

1-9
01
HEV (HYBRID ELECTRIC VEHICLE) SYSTEM
The HYUNDAI Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the
electric motor for power. The electric motor is run by a high-voltage HEV battery.
Depending on the driving conditions, the HEV computer selectively operates between
the engine and the electric motor or even both at the same time.
Fuel efficiency increases when the engine is at idle, or when the vehicle is driven by the
electric motor with the HEV battery.
The HEV battery charge must be maintained, so at times the engine will come on even
at idle to act as a generator. Charging also occurs when decelerating or by regenerative
braking.
ONX4EHQ010001

Convenient features
5-12
Remotely starting vehicle (if
equipped)
You can start the vehicle using the
Remote Start button on the smart key.
To start the vehicle remotely:
1.
Bef
ore you can use remote start your
vehicle, the door lock button must be
pressed. Press the door lock button
on the Smart Key. You must be within
about 32 feet (10m) from your vehicle.
2.
Press and hold the r

emote start
button on your Smart Key. You must
press the button within 4 seconds
from when you pressed the door lock
button to activate the remote start.
3.
The hazard w

arning lights will blink
and the engine will start.
4.
To turn o

ff the remote start function,
press the Remote Start button once.
Information
• The vehicle must be in P (Park) for the
remote start function to start.
• The engine turns off if you get on the
vehicle without a registered smart key.
• The engine turns off if you do not get
on the vehicle within 10 minutes after
remotely starting the vehicle.
• The Remote Start button may not
operate if the smart key is not within 32
feet (10 m).
• The vehicle will not remotely start if the
engine hood or liftgate is opened.
• Do not idle the engine for a long period.
Remote Smart Parking Assist
Feature (if equipped)
Some models are equipped with Remote
Smart Parking Assist Feature. With the
Smart Key, the vehicle can be moved
forward or backward remotely to enter or
exit a tight parking space.
For more details, refer to “Remote
Smart Parking Assist (RSPA)” section in
chapter 7.
Panic alarm
The horn sounds and the hazard warning
lights blink for about 30 seconds if
this button is pressed for more than 1
seconds. To stop the horn and lights,
press any button on the transmitter.
Push Button Start/Stop (if equipped)
Some models are equipped with a push
button start instead of a key cylinder.
You can leave your Smart Key in your
pocket or purse when you start your
vehicle.
For more details, refer to the “Engine
Start/Stop Button” section in chapter 6.
Information
If the smart key is not moved for some
time, the detection function for smart key
operation will pause. Lift the smart key to
activate the detection again.
NOTICE
To prevent damaging the smart key:
• Keep the smart key in a cool,
dry place to avoid damage or
malfunction. Exposure to moisture
or high temperature may cause
the internal circuit of the smart key
to malfunction which may not be
covered under warranty.
• Avoid dropping or throwing the
smart key.
• Protect the smart key from extreme
temperatures.

06
6-3
WARNING
Carbon monoxide (CO) gas is toxic. Breathing CO can cause unconsciousness and
death.
Engine exhaust contains carbon monoxide which cannot be seen or smelled.
Do not inhale engine exhaust.
If at any time you smell engine exhaust inside the vehicle, open the windows
immediately. Exposure to CO can cause unconsciousness and death by asphyxiation.
Be sure the exhaust system does not leak.
The exhaust system should be checked whenever the vehicle is raised to change the
oil or for any other purpose. If you hear a change in the sound of the exhaust or if you
drive over something that strikes the underneath side of the vehicle, we recommend
that the exhaust system be checked as soon as possible by an authorized HYUNDAI
dealer.
Do not run the engine in an enclosed area.
Letting the engine idle in your garage, even with the garage door open, is a hazardous
practice. Run the engine only long enough to start the engine and to move the vehicle
out of the garage.
Avoid idling the engine for prolonged periods with people inside the vehicle.
If it is necessary to idle the engine for a prolonged period with people inside the
vehicle, be sure to do so only in an open area with the air intake set at “Fresh” and fan
control set to high so fresh air is drawn into the interior.
Keep the air intakes clear.
To assure proper operation of the ventilation system, keep the ventilation air intakes
located in front of the windshield clear of snow, ice, leaves, or other obstructions.
If you must drive with the liftgate open:
Close all windows.
Open instrument panel air vents.
Set the air intake control at “Fresh”, the air flow control at “Floor” or “Face”, and the fan
control set to high.
WARNING
CALIFORNIA PROPOSITION 65 WARNING
Engine exhaust and a wide variety of automobile components including
components found in the interior furnishings in a vehicle, contain or emit harmful
chemicals known to the State of California to cause cancer and birth defects and
reproductive harm. In addition, certain fluids contained in vehicles and certain
products of components contain or emit chemicals known to the State of California
to cause cancer and birth defects or other reproductive harm.

Driving your vehicle
6-12
Remote start (if equipped)
„„Type A
OTM060003
„„Type B
OTM060004
You can start the vehicle using the
Remote Start button of the smart key.To start the vehicle remotely:
1.
Press the door lock butt

on within 32
feet (10 m) from the vehicle.
2.
Press and hold the r
emote start button
(
) within 4 seconds after pressing
the Door Lock button on the remote.
3.
To turn o

ff the remote start function,
press the remote start (
) button
once.
• The remote start (
) button may not
operate if the smart key is not within
32 feet (10 m).
• The vehicle will not remotely start if
the engine hood or liftgate is opened.
• The vehicle must be in P (Park) for the
remote start function to start.
• The engine turns off if you get in the
vehicle without a registered smart key.
• The engine turns off if you do not get
in the vehicle within 10 minutes after
remotely starting the vehicle.
• Do not idle the engine for a long
period.

Driving your vehicle
6-66
NOTICE
To prevent engine and/or transmission
overheating:
• When towing a trailer on steep
grades (in excess of 6%) pay close
attention to the engine coolant
temperature gauge to ensure the
engine does not overheat. If the
needle of the coolant temperature
gauge moves towards “H” (HOT),
pull over and stop as soon as it is
safe to do so, and allow the engine
to idle until it cools down. You may
proceed once the engine has cooled
sufficiently.
• If you tow a trailer with the maximum
gross vehicle weight and maximum
trailer weight, it can cause the
engine or transmission to overheat.
When driving in such conditions,
allow the engine to idle until it cools
down. You may proceed once the
engine or transmission has cooled
sufficiently.
• When towing a trailer, your vehicle
speed may be much slower than the
general flow of traffic, especially
when climbing an uphill grade. Use
the right hand lane when towing a
trailer on an uphill grade. Choose
your vehicle speed according to the
maximum posted speed limit for
vehicles with trailers, the steepness
of the grade, and your trailer weight.
Parking on hills
Generally, if you have a trailer attached
to your vehicle, you should not park your
vehicle on a hill.
However, if you ever have to park your
trailer on a hill, here’s how to do it:
1.
Pull the

vehicle into the parking space.
Turn the steering wheel in the
direction of the curb (right if headed
down hill, left if headed up hill).
2.
Shift the gear to P (P

ark).
3.
Set the parking br

ake and shut off the
vehicle.
4.
Place wheel chocks under the tr

ailer
wheels on the down hill side of the
wheels.
5.
Start the v

ehicle, hold the brakes, shift
to neutral, release the parking brake
and slowly release the brakes until the
trailer chocks absorb the load.
6.
Reapply the br

akes and parking
brakes.
7.
Shift the gear to P (P

ark) when the
vehicle is parked on a uphill grade and
in R (Reverse) on a downhill.
8.
Shut off the v

ehicle and release the
vehicle brakes but leave the parking
brake set.
WARNING
To prevent serious or fatal injury:
• Do not get out of the vehicle without
the parking brake firmly set. If you
have left the engine running, the
vehicle can move suddenly. You and
others could be seriously or fatally
injured.
• Do not apply the accelerator pedal to
hold the vehicle on an uphill.

06
6-67
Driving the vehicle after it has been
parked on a hill
1. With the gear in P (Park), apply your
brakes and hold the brake pedal down
while you:
• Start your engine;
• Shift into gear; and
• Release the parking brake.
2.
Slowly r

emove your foot from the
brake pedal.
3.
Drive slo

wly until the trailer is clear of
the chocks.
4.
St

op and have someone pick up and
store the chocks.
Maintenance when towing a
trailer
Your vehicle will need service more
often when you regularly pull a trailer.
Important items to pay particular
attention to include engine oil,
transmission fluid, axle lubricant and
cooling system fluid. Brake condition
is another important item to frequently
check. If you’re trailering, it’s a good
idea to review these items before
you start your trip. Don’t forget to
also maintain your trailer and hitch.
Follow the maintenance schedule that
accompanied your trailer and check it
periodically. Preferably, conduct the
check at the start of each day’s driving.
Most importantly, all hitch nuts and bolts
should be tight.
NOTICE
To prevent vehicle damage:
• Due to higher load during trailer
usage, overheating might occur on
hot days or during uphill driving.
If the coolant gauge indicates
over-heating, switch off the air
conditioner and stop the vehicle in a
safe area to cool down the engine.
• Do not switch off the engine while
the coolant gauge indicates over-
heating.
(Keep the engine idle to cool down
the engine)
• When towing check transmission
fluid more frequently.
• If your vehicle is not equipped with
an air conditioner, you should install
a condenser fan to improve engine
performance when towing a trailer.

Maintenance
9-68
Operating precautions for catalytic
converters (if equipped)
WARNING
The exhaust system and catalytic
converter are very hot during and
immediately after the engine has been
running. To avoid SERIOUS INJURY or
DEATH:
• Do not park, idle, or drive the vehicle
over or near flammable objects, such
as grass, vegetation, paper, leaves,
etc. A hot exhaust system can ignite
flammable items under your vehicle.
• Keep away from the exhaust system
and catalytic converter or you may
get burned.
Also, Do not remove the heat sink
around the exhaust system, do not
seal the bottom of the vehicle, and
do not coat the vehicle for corrosion
control. It may present a fire risk
under certain conditions. Your vehicle is equipped with a catalytic
converter emission control device.
To prevent damage to the catalytic
converter and to your vehicle, take the
following precautions:
•
Use only UNLEADED FUEL for
gasoline engines.
• Do not operate the vehicle when
there are signs of engine malfunction,
such as misfire or a noticeable loss of
performance.
• Do not misuse or abuse the engine.
Examples of misuse are coasting with
the hybrid system off and descending
steep grades in gear with the hybrid
system off.
• Do not operate the engine at high
idle speed for extended periods (5
minutes or more).
• Do not modify or tamper with any
part of the engine or emission control
system. We recommend that all
inspections and adjustments are
made by an authorized HYUNDAI
dealer.
• Avoid driving with an extremely low
fuel level.
Running out of fuel could cause the
engine to misfire, damaging the
catalytic converter.