2023 HYUNDAI TUCSON HYBRID engine start stop

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.
ONX4H061001ONX4H061001
Startup/
Low speed cruise
Acceleration High speed cruise Deceleration Stop
Electric motorElectric motor + EngineElectric motor + EngineChargingEngine OFF

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-50
Starting the Vehicle
Vehicles with smart key system
1. Carry the smart key or leave it inside the vehicle.
2. Make sure the parking brake is firmly applied.
3. Make sure the shift button is in P (Park). With the shift button in N
(Neutral), you cannot start the vehicle.
4. Depress the brake pedal.
5. Press the Engine Start/Stop button. If the hybrid system starts, the “
”
indicator will come on.
Whether the engine is cold or warm, it
should be started without depressing
the accelerator.
After following the start procedures,
“
” indicator on the instrument
cluster will turn on. For more details,
please check chapter 6.
ECONOMICAL and SAFE OPERATION of
Hybrid system
• Drive smoothly. Accelerate at a moderate rate and maintain a steady
cruising speed. Do not make “jack-
rabbit” starts. Do not race between
stoplights.
Avoid heavy traffic whenever possible.
Always maintain a safe distance
from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear out.
• The regenerative brake generates energy when the vehicle decelerates.
• When the hybrid battery power is low, the hybrid system automatically
recharges the hybrid battery.
• When the engine is running with the shift button in N (Neutral), the hybrid
system cannot generate electricity.
The hybrid battery cannot recharge
with the shift button in N (Neutral).
Information
In the hybrid system, the engine
automatically runs and stops. When
the hybrid system operates, the “
”
indicator is illuminated.
In the following situation, the engine may
operate automatically.
- When the engine is ready to run
- When the hybrid battery is being
charged
- Depending on the temperature
condition of the hybrid battery
Special Features
Hybrid vehicles sound different than
gasoline engine vehicles. When the
hybrid system operates, you may
hear a sound from the hybrid battery
system under the floor. If you apply
the accelerator pedal rapidly, you may
hear an unconventional sound. When
you apply the brake pedal, you may
hear a sound from the regenerative
brake system. When the hybrid system
is turned off or on, you may hear a
sound in the engine compartment. If
you depress the brake pedal repeatedly
when the hybrid system is turned on,
you may hear a sound in the engine
compartment. None of these sounds
indicate a problem. These are normal
characteristics of hybrid vehicles.
If any of following occur, it’s a normal
condition if you hear a motor sound in
the engine compartment:
- After turning off the hybrid system, the brake pedal is released.
- When the hybrid system is turned off, the brake pedal is applied.
- When the driver door is opened.
DRIVING THE HYBRID VEHICLE

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-52
Hybrid System Gauge
Power gauge
„„4.2-Inch4.2-Inch
ONX4H040004ONX4H040004
„„10.25-inch10.25-inch
OCN7H040002OCN7H040002
The hybrid system gauge indicates
whether the current driving condition is
fuel efficient or not.
• CHARGE: Shows that the energy made by the
vehicle is being converted to electrical
energy. (Regenerated energy)
• ECO: Shows that the vehicle is being driven
in an Eco-friendly manner.
• POWER:
Shows that the vehicle is exceeding
the Eco-friendly range.
According to the hybrid system gauge
area, the “EV” indicator comes on or off. - “EV” indicator ON : Vehicle is driven using the electric motor or the
gasoline engine is stopped.
- “EV” indicator OFF : Vehicle is driven using the gasoline engine.
Hybrid battery SOC (State of Charge)
gauge
„„4.2-Inch4.2-Inch
ONX4HQ010016NONX4HQ010016N
„„10.25-inch10.25-inch
OCN7H040003OCN7H040003
This gauge indicates the remaining
hybrid battery power. If the SOC is
near the “L (Low)” level, the vehicle
automatically operates the engine to
charge the battery.
However, if the Service Indicator (
)
and Malfunction Indicator Lamp (MIL)
(
) turn on when the SOC gauge is
near the “L (Low)” level, have the vehicle
be checked by an authorized HYUNDAI
dealer.

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-58
Stop safely and check Hybrid system
OOSHQ019007LOOSHQ019007L
This message is displayed when there
is a problem with the hybrid control
system. The “
” indicator will blink
and a warning chime will sound for
approximately 10 seconds until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, have the vehicle inspected
by an authorized HYUNDAI dealer.
Check Hybrid system. Do not start
engine
OOSHQ019008LOOSHQ019008L
This message is displayed when the
hybrid battery power (SOC) level is low.
A warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, have the vehicle inspected
by an authorized HYUNDAI dealer.
Stop safely and check power supply
OOSHQ019009LOOSHQ019009L
This message is displayed when a failure
occurs in the power supply system.
If this occurs, park the vehicle in a safe
location and tow your vehicle to the
nearest authorized HYUNDAI dealer and
have the vehicle inspected.
Check virtual engine sound system
OOSHQ019010LOOSHQ019010L
This message is displayed when there is
a problem with the Virtual Engine Sound
System (VESS).
If this occurs, have the vehicle inspected
by an authorized HYUNDAI dealer.

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-60
Unplug vehicle to start (Plug-in
hybrid vehicle)
OAEPHQ049829LOAEPHQ049829L
This message is displayed when you
start the engine without unplugging the
charging cable. Unplug the charging
cable, and then start the vehicle.
Charging stopped. Check the AC
charger
OOSEV048131LOOSEV048131L
• This warning message is displayed when charging is stopped for the
reasons below:
- There is a problem with the external AC charger
- The external AC charger stopped charging
- The charging cable is damaged
In this case, check whether there is
any problem with the external AC and
charging cable.
If the same problem occurs when
charging the vehicle with a normally
operating AC charger or genuine
HYUNDAI portable charger, have your
vehicle inspected by an authorized
HYUNDAI dealer.

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-66
Engine generation
ONX4EHQ010005ONX4EHQ010005
When the vehicle is stopped, the high-
voltage battery is charged up by the
engine.
(Engine
Ÿ Battery)
Regeneration
ONX4EHQ010006ONX4EHQ010006
The high-voltage battery is charged up
by the regenerative brake system.
(Wheel
Ÿ Battery)
Engine brake
ONX4EHQ010007ONX4EHQ010007
The engine braking is used to decelerate
the vehicle.
(Wheel
Ÿ Engine)
Power reserve
ONX4EHQ010008ONX4EHQ010008
The engine is simultaneously used to
drive the vehicle and to charge up the
high-voltage battery.
(Engine
Ÿ Wheel & Battery)

2-5
02
1. Instrument cluster .................................. 4-4
2. Driver’s front air bag ............................. 3-45
3. Engine Start/Stop button ....................... 6-8
4. Infotainment system .............................. 4-58
5. Hazard warning lamp switch ................. 8-2
6. Climate control system ........................ 5-99
7. Air ventilation seat ................................ 3-20
8. Seat warmer .......................................... 3-18
9. Heated steering wheel ......................... 5-41
10. Parking Safety button ......................... 7-139
11. Parking/View button .......................... 7-153
12. Transmission shift button ..................... 6-1313. EPB (Electronic Parking Brake) switch ...6-19
14. Auto Hold switch ................................. 6-23
15. Drive mode button .............................. 6-46
16. Passenger’s front air bag ..................... 3-45
17. Glove box ..............................................5-119
18. USB port ................................................ 5-131
19. Power outlet ..........................................5-119
20. USB charger .......................................... 5-121
21. Wireless charging system pad ............ 5-123
22. DBC (Downhill Brake Control) button . 6-33
The actual shape may differ from the illustration.
ONX4H010005N
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2-11
02
1. Instrument cluster .................................. 4-4
2. Driver’s front air bag ............................. 3-45
3. Engine Start/Stop button ....................... 6-8
4. Infotainment system .............................. 4-58
5. Hazard warning lamp switch ................. 8-2
6. Climate control system ........................ 5-99
7. Air ventilation seat ................................ 3-20
8. Seat warmer .......................................... 3-18
9. Heated steering wheel ......................... 5-41
10. Parking Safety button ......................... 7-139
11. Parking/View button .......................... 7-153
12. Transmission shift button ..................... 6-1313. EPB (Electronic Parking Brake) switch ...6-19
14. Auto Hold switch ................................. 6-23
15. Drive mode button .............................. 6-46
16. Passenger’s front air bag ..................... 3-45
17. Glove box ..............................................5-119
18. USB port ................................................ 5-131
19. Power outlet ..........................................5-119
20. USB charger .......................................... 5-121
21. Wireless charging system pad ............ 5-123
22. DBC (Downhill Brake Control) button . 6-33
23. HEV button............................................. 1-53
24. 4WD lock button ................................... 6-37
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