2021 HYUNDAI SANTA FE HYBRID ECU

Maintenance
9-18
Turn the vehicle off and wait until the
engine cools down. Use extreme care
when removing the engine coolant
cap and/or inverter coolant cap. Wrap
a thick towel around it, and turn it
counterclockwise slowly to the first
stop. Step back while the pressure is
released from the cooling system. When
you are sure all the pressure has been
released, press down on the cap, using
a thick towel, and continue turning
counterclockwise to remove it.
Information
The engine coolant and/or inverter coolant
level is influenced by the hybrid system
temperature. Before checking or refilling
the engine coolant and/or inverter coolant,
turn the hybrid vehicle off.
WARNING
The electric motor for the cooling fan may continue to operate or start up
when the engine is not running and
can cause serious injury. Keep hands,
clothing and tools away from the
rotating fan blades of the cooling fan.
Always turn off the vehicle unless the
vehicle has to be inspected with the
engine on. Be cautious as the cooling
fan may operate if the negative (-)
battery terminal is not disconnected.
WARNING
Make sure the coolant cap is properly
closed after refilling coolant. Otherwise
the engine could be overheated while
driving.
„„Engine compartment front view
OTMH090008
1. Check if the coolant cap label is
straight In front.
„„Engine compartment rear view
OTMH090009
2. Make sure that the tiny protrusions
inside the coolant cap is securely
interlocked.

Maintenance
9-28
For best battery service
„„Luggage compartment
OTMH090021
• Keep the battery securely mounted.
• Keep the battery top clean and dry.
• Keep the terminals and connections
clean, tight, and coated with
petroleum jelly or terminal grease.
• Rinse any spilled electrolyte from the
battery immediately with a solution of
water and baking soda.
• If the vehicle is not going to be used
for an extended time, disconnect the
battery cables.
Information - For batteries
marked with UPPER and
LOWER
OHI078084L
If your vehicle is equipped with a battery
marked with LOWER (MIN) and UPPER
(MAX) on the side, you should check the
electrolyte level.
The electrolyte level should be between
LOWER (MIN) and UPPER (MAX).
When the electrolyte level is low, add
distilled (or de-mineralized) water. (Never
add sulfuric acids or other electrolyte).
Be careful not to spill distilled (or
demineralized) water over the battery
surface or other adjacent components.
Also, do not overfill the battery cells.
If not, it may corrode the battery or other
components. Finally, securely close the
cell cap. However, we recommend you to
contact an authorized HYUNDAI dealer
for better battery service.

Maintenance
9-42
Engine compartment panel fuse
replacement
„„Blade type fuse
OTMH090015
„„Cartridge type fuse
OTMH090016
1. Turn the vehicle off.
2. Turn all other switches off.
3. Remove the fuse panel cover by
pressing the tap and pulling up.
4. Check the removed fuse; replace it
if it is blown. To remove or insert the
fuse, use the fuse puller in the engine
compartment fuse panel.
5. Push in a new fuse of the same rating,
and make sure it fits tightly in the
clips. If it fits loosely, we recommend
that you consult an authorized
HYUNDAI dealer.
NOTICE
After checking the fuse panel in the
engine compartment, securely
install the fuse panel cover. You may
hear a clicking sound if the cover is
securely latched. If it is not securely
latched, electrical failure may occur
from water contact.
Multi fuse
OTMH090017
If the multi fuse is blown, we recommend
that you consult an authorized HYUNDAI
dealer.

Maintenance
9-50
Engine compartment fuse panel
Fuse NameFuse
Rating Circuit Protected
IG1 40A
IG1 Relay
TCU2 10A
TCM
SENSOR3 20A
ECM, Oxygen Sensor (Up/Down)
SENSOR1 10A
ELCM
EWP2 10A
Electronic Water Pump
ECU3 10A
ECM, CVVD Actuator
SENSOR6 10A
OPU
POWER
OUTLET1 20A
Luggage Power Outlet
WIPER2 10A
IBU, Front Wiper Motor
HORN 15A
Horn Relay
IEB4 10A
IEB Unit
SENSOR2 10APurge Control Solenoid Valve,
Oil Control Valve #1/#2(Intake/Exhaust),
Oil Pump Solenoid Valve, Cooling Fan Motor,
RCV Control Solenoid Valve
SENSOR4 15A
Active Purge Pump
SENSOR5 10A
E/R Junction Block (RLY. 5)
IGN COIL 20A
Ignition Coil #1/#2/#3/#4
ACC 20A
ICU Junction Block (Fuse – F37/F47)
POWER
OUTLET2 20A
Front Power Outlet
WIPER1 30A
Front Wiper Motor, Front Wiper (Low) Relay
E-SHIFTER3 10A
SCU
FCA 10A
Front Radar Unit
HPCU 2 10A
HPCU
ECU1 15A
ECM
ECU4 20A
ECM
TCU1 15A
TCM
RR HTD2 10A
E/R Junction Block (RLY. 1)

I
I -7
Important safety precautions........................................................................\
.......... 3-2
Air bag hazards ........................................................................\
...........................3-2
Always wear your seat belt ........................................................................\
........3-2
Control your speed ........................................................................\
.....................3-2
Driver distraction ........................................................................\
........................3-2
Keep your vehicle in safe condition ...................................................................3-2
Restrain all children ........................................................................\
...................3-2
In case of an emergency while driving
..................................................................8-2
If the engine stalls at a crossroad or crossing .....................................................8-2
If the engine stalls while driving ........................................................................\
8-2
If you have a flat tire while driving ....................................................................8-3
Infotainment system ........................................................................\
................... 5-124
Antenna ........................................................................\
..................................5-124
Bluetooth® Wireless Technology ....................................................................5-126
Infotainment system ........................................................................\
...............5-125
Steering wheel remote controls ......................................................................5-124
USB Port ........................................................................\
................................5-124
Voice recognition ........................................................................\
....................5-125
Instrument cluster
........................................................................\
..........................4-4
Gauges and meters ........................................................................\
.....................4-5
Instrument cluster control ........................................................................\
...........4-5
LCD display messages ........................................................................\
.............4-22
Transmission shift indicator ........................................................................\
.......4-9
Warning and indicator lights ........................................................................\
....4-10
Instrument panel overview (I)
........................................................................\
......2-5
Instrument panel overview (II)
........................................................................\
.....2-6
Integrated memory system
........................................................................\
...........5-33
Easy access function ........................................................................\
.................5-35
Recalling memory positions ........................................................................\
.....5-34
Resetting the system ........................................................................\
.................5-34
Storing memory positions ........................................................................\
........5-33
Interior features
........................................................................\
..........................5-111
AC Inverter ........................................................................\
.............................5-114
Ashtray ........................................................................\
...................................5-112
Cargo security screen ........................................................................\
.............5-122
Clock ........................................................................\
......................................5-119
Coat hook ........................................................................\
...............................5-119
Cup holder ........................................................................\
..............................5-111