2021 HYUNDAI SANTA FE HYBRID Owners Manual

01
1-13
Warning and indicator lights
Ready indicator
This indicator illuminates:
When the vehicle is ready to be driven.
-ON : Normal driving is possible.
-OFF : Normal driving is not possible,
or a problem has occurred.
-Blinking : Emergency driving.
When the ready indicator goes OFF
or blinks, there is a problem with the
system. If this occurs, we recommend
that you have your vehicle inspected by
an authorized HYUNDAI dealer.
EV mode indicator
This indicator illuminates:
When the vehicle is driven by the electric
motor.
Service warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
-The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.
• When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates
while driving, or does not go OFF after
starting the vehicle, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Regenerative brake warning
light
(yellow)
This warning light illuminates:
When the regenerative brake does not
operate and the brake does not perform
well. This causes the Brake Warning
light (red) and Regenerative Brake
Warning Light (yellow) to illuminate
simultaneously.
If this occurs, drive safely and have
your vehicle inspected by an authorized
HYUNDAI dealer. The operation of the
brake pedal may be more difficult than
normal and the braking distance may
increase.

Foreword / Hybrid System Overview
1-14
LCD display messages
Ready to drive
OTMHQ010019N
This message is displayed when the
vehicle is ready to be driven.
Check regenerative brakes
OTMHQ010020N
This message is displayed when
the brake performance is low or the
regenerative brake does not work
properly due to a failure in the brake
system.
If this occurs, it may take longer for the
brake pedal to operate and the braking
distance may become longer.
Stop vehicle and check regenerative
brakes
OTMHQ010021N
This message is displayed when a failure
occurs in the brake system.
If this occurs, park the vehicle in a
safe location and we recommend that
you tow your vehicle to the nearest
authorized HYUNDAI dealer and have the
vehicle inspected.
Check Hybrid system
OTMHQ010022N
This message is displayed when there is a
problem with the hybrid control system.
Refrain from driving when the warning
message is displayed.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.

01
1-15
Check Hybrid system. Stop safely
OTMHQ010023N
This message is displayed when there
is a problem with the hybrid control
system. The “
” indicator will blink
and a warning chime will sound until the
problem is solved. Refrain from driving
when the warning message is displayed.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Check Hybrid system. Do not start
engine
OTMHQ010024N
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, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Stop safely and check power supply
OTMHQ010025N
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
OTMHQ010026N
This message is displayed when there is
a problem with the Virtual Engine Sound
System (VESS).
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.

Foreword / Hybrid System Overview
1-16
Refill inverter coolant
OTMHQ010028N
This message is displayed when the
inverter coolant is nearly empty.
You should refill the inverter coolant.
Park with engine On to charge
battery
OTMHQ010029N
This message is displayed when the
hybrid battery power (SOC) level is low.
If this occurs, park the vehicle in a safe
location and wait until the hybrid battery
is charged.
Start engine to avoid battery
discharge
OTMHQ010030N
This message is displayed to inform the
driver the 12V battery may be discharged
if the ignition switch is in ON position
(without the
indicator ON).
Set the vehicle to the ready () mode
to prevent the 12V battery from being
discharged.

01
1-17
Energy flow
The hybrid system informs the drivers its
energy flow in various operating modes.
While driving, the current energy flow is
specified in 11 modes.
Vehicle stop
OTMH040015N
The vehicle is stopped.
(No energy flow)
Electric mode
OTMHQ010003
Only the motor power is used to drive the
vehicle.
(Battery → Wheel)
Hybrid mode
OTMHQ010004
Both the motor and the engine power are
used to drive the vehicle.
(Battery & Engine → Wheel)
Fuel engine mode
OTMHQ010005
Only the engine power is used to drive
the vehicle.
(Engine → Wheel)

Foreword / Hybrid System Overview
1-18
Engine generation
OTMHQ010006
When the vehicle is stopped, the high-
voltage battery is charged up by the
engine.
(Engine → Battery)
Regeneration
OTMHQ010007
The high-voltage battery is charged up
by the regenerative brake system.
(Wheel → Battery)
Engine brake
OTMHQ010008
The engine braking is used to decelerate
the vehicle.
(Wheel → Engine)
Power reserve
OTMHQ010009
The engine is simultaneously used to
drive the vehicle and to charge up the
high-voltage battery.
(Engine → Wheel & Battery)

01
1-19
Engine generation/motor drive
OTMHQ010010
The engine charges up the high-voltage
battery. The motor power is used to drive
the vehicle.
(Engine → Battery → Wheel)
Engine generation/regeneration
OTMHQ010011
The engine and regenerative brake
system charges up the high-voltage
battery.
(Engine & Wheel → Battery)
Engine brake/regeneration
OTMHQ010012
The engine braking is simultaneously
used to decelerate the vehicle and to
charge up the high-voltage battery.
(Wheel → Engine & Battery)

Foreword / Hybrid System Overview
1-20
SAFETY PRECAUTIONS FOR HYBRID SYSTEM
Hybrid vehicle components
High voltage battery system
„„HPCU (Hybrid Power Control Unit) *1
OTMHQ010013
„„High voltage battery system *2
OTMHQ010014
*1 : Located in the engine compartment
*2 : Located under the floor
WARNING
Never touch orange colored or high
voltage labeled components, including
wires, cables, and connections. When
the insulators or covers are damaged or
removed, severe injury or death from
electrocution may occur.
WARNING
While replacing the fuses in the
engine compartment, never touch the
HPCU. The HPCU carries high voltage.
Touching the HPCU may result in
electrocution, serious injury, or death.
WARNING
In the hybrid system, the hybrid battery
uses high voltage to operate the motor
and other components. This high
voltage hybrid battery system can be
very dangerous.
Never touch the hybrid system. When
you touch the hybrid battery system,
serious injury or death may occur.
CAUTION
• Do not pile up any items in an area
behind the high voltage battery. In
a crash, the battery may become
unstable, or its performance may
degrade.
• Be careful when loading
flammable liquid in the passenger
compartment. It could cause
operational and safety degradation if
the liquid leaks and flows in the high
voltage battery.
„„Drive motor *3
OTMHQ010015
*3 : Located in the engine compartment