2021 HYUNDAI TUCSON HYBRID ECU

07
7-21
WARNING
Take the following precautions when
using Forward Collision-Avoidance
Assist:
• For your safety, change the Settings
after parking the vehicle at a safe
location.
• With ‘Active assist’ or ‘Warning only’
selected, when ESC is turned off by
pressing and holding the ESC OFF
button for more than 3 seconds,
Forward Collision-Avoidance Assist
will turn off automatically. In this
case, Forward Collision-Avoidance
Assist cannot be set from the
Settings menu and the
warning
light will illuminate on the cluster
which is normal. If ESC is turned on
by pressing the ESC OFF button,
Forward Collision-Avoidance Assist
will maintain the last setting.
• Forward Collision-Avoidance Assist
does not operate in all situations or
cannot avoid all collisions.
• The driver should hold the
responsibility to control the vehicle.
Do not solely depend on Forward
Collision-Avoidance Assist. Rather,
maintain a safe braking distance, and
if necessary, depress the brake pedal
to reduce driving speed or to stop
the vehicle.
• Never deliberately operate Forward
Collision-Avoidance Assist on people,
objects, etc. It may cause serious
injury or death.
• Forward Collision-Avoidance
Assist may not operate if the driver
depresses the brake pedal to avoid
collision. •
Depending on the road and driving
conditions, Forward Collision-
Avoidance Assist may warn the driver
late or may not warn the driver.
• During Forward Collision-Avoidance
Assist operation, the vehicle may
stop suddenly injuring passengers
and shifting loose objects. Always
have the seat belt on and keep loose
objects secured.
• If any other system’s warning
message is displayed or audible
warning is generated, Forward
Collision-Avoidance Assist warning
message may not be displayed
and audible warning may not be
generated.
• You may not hear the warning sound
of Forward Collision-Avoidance
Assist if the surrounding is noisy.
• Forward Collision-Avoidance
Assist may turn off or may not
operate properly or may operate
unnecessarily depending on the road
conditions and the surroundings.
WARNING
• Even if there is a problem with
Forward Collision-Avoidance
Assist, the vehicle’s basic braking
performance will operate normally.
• During emergency braking, braking
control by Forward Collision-
Avoidance Assist will automatically
cancel when the driver excessively
depresses the accelerator pedal or
sharply steers the vehicle.

Driver assistance system
7-44
WARNING
Take the following precautions when
using Blind-Spot Safety system:
• For your safety, change the Settings
after parking the vehicle at a safe
location.
• If any other system’s warning
message is displayed or audible
warning is generated, Blind-Spot
Safety system’s warning message
may not be displayed and audible
warning may not be generated.
• You may not hear the warning sound
of Blind-Spot Safety system if the
surrounding is noisy.
• Blind-Spot Safety system may not
operate if the driver applies the
brake pedal to avoid collision.
• When Blind-Spot Safety system
is operating, braking control by
the function will automatically
cancel when the driver excessively
depresses the accelerator pedal or
sharply steers the vehicle.
• During Blind-Spot Safety system
operation, the vehicle may stop
suddenly injuring passengers and
shifting loose objects. Always have
the seat belt on and keep loose
objects secured.
• Even if there is a problem with Blind-
Spot Safety system, the vehicle’s
basic braking performance will
operate normally.
• Blind-Spot Safety system does not
operate in all situations or cannot
avoid all collisions. •
Blind-Spot Safety system may warn
the driver late or may not warn the
driver depending on the road and
driving conditions.
• Driver should maintain control
of the vehicle at all times. Do not
depend on Blind-Spot Safety system.
Maintain a safe braking distance, and
if necessary, depress the brake pedal
to reduce driving speed or to stop
the vehicle.
• Never operate Blind-Spot Safety
system on people, animal, objects,
etc. It may cause serious injury or
death.
WARNING
The brake control may not operate
properly depending on the status of
ESC (Electronic Stability Control).
There will only be a warning when:
-The ESC (Electronic S

tability Control)
warning light is on
- ESC (Electronic S

tability Control) is
engaged in a different function

Driver assistance system
7-126
WARNING
Take the following precautions when
using Rear Cross-Traffic Safety system:
• For your safety, change the Settings
after parking the vehicle at a safe
location.
• If any other system’s warning
message is displayed or audible
warning is generated, Rear Cross-
Traffic Safety system’s warning
message may not be displayed
and audible warning may not be
generated.
• You may not hear the warning sound
of Rear Cross-Traffic Safety system if
the surrounding is noisy.
• Rear Cross-Traffic Safety system may
not operate if the driver applies the
brake pedal to avoid collision.
• During Rear Cross-Traffic Safety
system operation, the vehicle may
stop suddenly injuring passengers
and shifting loose objects. Always
have the seat belt on and keep loose
objects secured.
• Even if there is a problem with Rear
Cross-Traffic Safety system, the
vehicle’s basic braking performance
will operate normally.
• When Rear Cross-Traffic Safety
system is operating, braking control
by the function will automatically
cancel when the driver excessively
depresses the accelerator pedal.
• Rear Cross-Traffic Safety system does
not operate in all situations or cannot
avoid all collisions.
• Rear Cross-Traffic Safety system may
warn the driver late or may not warn
the driver depending on the road and
driving conditions. •
The driver should hold the
responsibility to control the vehicle.
Do not solely depend on Rear
Cross-Traffic Safety system. Rather,
maintain a safe braking distance, and
if necessary, depress the brake pedal
to reduce driving speed or to stop
the vehicle.
• Never deliberately operate Rear
Cross-Traffic Safety system on
people, animal, objects, etc. It may
cause serious injury or death.
CAUTION
The brake control may not operate
properly depending on the status of
ESC (Electronic Stability Control).
There will only be a warning when:
-The ESC (Electronic S

tability Control)
warning light is on
- ESC (Electronic S

tability Control) is
engaged in a different function
Information
If the function assists you with braking,
the driver must immediately depress
the brake pedal and check vehicle
surroundings.
- Brake control will end when the driver
depresses the brake pedal with sufficient
power.
- After shifting the gear

to R (Reverse),
braking control will operate once for left
and right vehicle approach.

08
8-19
OTM080023
2. Remove the cover (A) of the sealant
bottle (2) and compressor (6).
OTM080024
3. Connect the sealant bo ttle (2) and
compressor (6).
4.
Make sur

e that the valve (9) for
reducing tire inflation pressure is
closed.
ONX4080011
5. Unscrew the valve cap from the
v alve of the defective and screw
the connection hose (3) of the
compressor and tire.
NOTICE
Securely install the sealant filling hose
to the valve. If not, sealant may flow
backward, possibly clogging the filling
hose.
6.
Make sur

e the compressor turns off by
pressing [O] of the main switch (7).
ONX4080012
7. Connect the cable and connector ( 4)
to the power outlet in the vehicle.
8.
Start the v

ehicle.

Emergency situations
8-24
Removable towing hook
ONX4080017
1. Open the liftgate, and remove the
towing hook from the tool case.
„„Front
ONX4080018
„„Rear
ONX4H080001
2. Remove the hole cover by pressing
the lo wer part of the cover on the
bumper.
3.
Install the t

owing hook by turning it
clockwise into the hole until it is fully
secured.
4.
Remo

ve the towing hook and install
the cover after use.

08
8-25
Emergency towing
„„Front
ONX4080019
„„Rear
ONX4H080002
If towing is necessary, we recommend
you have it done by an authorized
HYUNDAI dealer or a commercial tow
truck service.
If a towing service is not available in
an emergency, your vehicle may be
temporarily towed using a cable or chain
secured to the emergency towing hook
at the front (or rear) of the vehicle.
Use extreme caution when towing the
vehicle with a cable or chain. A driver
must be in the vehicle to steer it and
operate the brakes.
Towing in this manner may be done
only on hard-surfaced roads for a short
distance and at low speeds. Also, the
wheels, axles, power train, steering and
brakes must all be in good condition.
CAUTION
The driver must be in the vehicle for
steering and braking operations when
the vehicle is being towed. Passengers
other than the driver must not be in the
vehicle.
Always follow these emergency towing
precautions:
• Place the ignition switch in the ACC
position so the steering wheel is not
locked.
• Place the shift button in N (Neutral).
• Release the parking brake.
• Depress the brake pedal with more
force than normal as you will have
reduced braking performance.
• More steering effort will be required
because the power steering system
will be disabled.
• Use a vehicle heavier than your own to
tow your vehicle.
• The drivers of both vehicles should
communicate with each other
frequently.
• Before emergency towing, check that
the hook is not broken or damaged.
• Fasten the towing cable or chain
securely to the hook.
• Do not jerk the hook. Apply steady
and even force.

9-3
09
„„Smartstream G1.6 T-GDi HEV
The actual engine compartment in the vehicle may differ from the illustration.
ONX4EH090001
1. ECU
2.
Engine coolan
t reservoir
3.
Engine coolan

t reservoir cap
4.
Inv

erter coolant reservoir
5.
Brak

e fluid reservoir
6.
Air cleaner 7.
Engine oil filler cap
8.
Engine oil dips
tick
9.
Windshield washer fluid r

eservoir
10.
Fuse bo

x
11.
Inv

ert coolant reservoir cap
EnginE compartmEnt

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
ONX4H090008
2. Make sure that the tiny protrusions
inside the c oolant cap is securely
interlocked.