ECU HYUNDAI TUCSON 2023 Service Manual

Driving your vehicle
6-70
Safety chains
You should always attach chains between
your vehicle and your trailer.
Instructions about safety chains may
be provided by the hitch manufacturer
or trailer manufacturer. Follow the
manufacturer’s recommendation for
attaching safety chains. Always leave just
enough slack so you can turn with your
trailer. And, never allow safety chains to
drag on the ground.
Trailer brakes
If your trailer is equipped with a braking
system, make sure it conforms to
your country’s regulations and that
it is properly installed and operating
correctly.
If your trailer weighs more than the
maximum trailer weight without trailer
brakes loaded, then it needs its own
brakes and they must be adequate. Be
sure to read and follow the instructions
for the trailer brakes so you’ll be able
to install, adjust and maintain them
properly. Be sure not to modify your
vehicle’s brake system.
WARNING
Do not use a trailer with its own brakes
unless you are absolutely certain that
you have properly set up the brake
system. This is not a task for amateurs.
Use an experienced, competent trailer
shop for this work.
Driving with a trailer
Towing a trailer requires a certain
amount of experience. Before setting
out for the open road, you must get to
know your trailer. Acquaint yourself with
the feel of handling and braking with the
added weight of the trailer. And always
keep in mind that the vehicle you are
driving is now longer and not nearly as
responsive as your vehicle is by itself.
Before you start, check the trailer hitch
and platform, safety chains, electrical
connector(s), lights, tires and brakes.
During your trip, occasionally check
to be sure that the load is secure, and
that the lights and trailer brakes are still
working.
Distance
Stay at least twice as far behind the
vehicle ahead as you would when driving
your vehicle without a trailer. This can
help you avoid situations that require
heavy braking and sudden turns.
Passing
You will need more passing distance up
ahead when you’re towing a trailer. And,
because of the increased vehicle length,
you’ll need to go much farther beyond
the passed vehicle before you can return
to your lane.

Driving your vehicle
6-78
Certification label
OBH059070
The certification label is located on the
driver's door sill at the center pillar and
shows the maximum allowable weight of
the fully loaded vehicle. This is called the
GVWR (Gross Vehicle Weight Rating). The
GVWR includes the weight of the vehicle,
all occupants, fuel and cargo.
This label also tells you the maximum
weight that can be supported by the
front and rear axles, called Gross Axle
Weight Rating (GAWR).
The total weight of the vehicle, including
all occupants, accessories, cargo, and
trailer tongue load must not exceed the
Gross Vehicle Weight Rating (GVWR) or
the Gross Axle Weight Rating (GAWR).
To find out the actual loads on your front
and rear axles, you need to go to a weigh
station and weigh your vehicle. Be sure
to spread out your load equally on both
sides of the centerline.
WARNING
Overloading
• Never exceed the GVWR for your
vehicle, the GAWR for either the front
or rear axle and vehicle capacity
weight. Exceeding these ratings
can affect your vehicle's handling
and braking ability, and cause an
accident.
• Do not overload your vehicle.
Overloading your vehicle can cause
heat buildup in your vehicle's tires
and possible tire failure, increased
stopping distances and poor vehicle
handling-all of which may result in a
crash.
NOTICE
Overloading your vehicle may cause
damage. Repairs would not be covered
by your warranty. Do not overload your
vehicle.
WARNING
If you carry items inside your vehicle
(e.g., suitcases, tools, packages, or
anything else), they are moving as fast
as the vehicle. If you have to stop or
turn quickly, or if there is a crash, the
items will keep going and can cause
an injury if they strike the driver or a
passenger.
• Put items in the cargo area of your
vehicle. Try to spread the weight
evenly.
• Do not stack items, like suitcases,
inside the vehicle above the tops of
the seats.
• Do not leave an unsecured child
restraint in your vehicle.
• When you carry something inside the
vehicle, secure it.

Driver assistance system
7-6
ONX4E070003
Stopping vehicle and ending brake control
• When the vehicle is stopped due
to emergency braking, the ‘Drive
carefully’ warning message will appear on the cluster.
For your safety, the driver should
depress the brake pedal immediately
and check the surroundings.
• Brake control will end after the vehicle
is stopped by emergency braking for
approximately 2 seconds.
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,
animal, 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.

Driver assistance system
7-22
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,
animal, 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.

07
7-45
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 system 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 Stability Control)
warning light is on
-ESC (Electronic Stability Control) is
engaged in a different function

07
7-127
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 system 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 is solely responsible to
operate the vehicle in a safe manner.
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 Stability Control)
warning light is on
-ESC (Electronic Stability Control) is
engaged in a different function
Information
If the system 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
8-17
WARNING
Wheels may have sharp edges. Handle
them carefully to avoid possible severe
injury. Before putting the wheel into
place, be sure that there is nothing on
the hub or wheel (such as mud, tar,
gravel, etc.) that interferes with the
wheel from fitting solidly against the
hub.
If there is, remove it. If there is not
good contact on the mounting surface
between the wheel and hub, the wheel
nuts could come loose and cause the
loss of a wheel. Loss of a wheel may
result in loss of control of the vehicle.
This may cause serious injury or death.
10. Install the spare tire onto the studs of
the hub.
11. Tighten the lug nuts with your fingers
onto the studs with the smaller end of
the lug nuts closest to the wheel.
12. Lower the vehicle to the ground
by turning the jack handle
counterclockwise.
OTL065007
13. Use the wheel lug wrench to tighten
the wheel bolts in the order shown.
Double-check each wheel bolts until
they are tight. After changing tires,
we recommend that an authorized
HYUNDAI dealer tighten the wheel
bolts to their proper torque as soon
as possible. The wheel bolt should
be tightened to 79~94 lbf.ft (11~13
kgf.m).
If you have a tire gauge, check the
tire pressure (see “Tires and Wheels”
section in chapter 2 for tire pressure
instructions.). If the pressure is lower or
higher than recommended, drive slowly
to the nearest service station and adjust
it to the recommended pressure. Always
reinstall the valve cap after checking
or adjusting tire pressure. If the cap
is not replaced, air may leak from the
tire. If you lose a valve cap, buy another
and install it as soon as possible. After
changing tires, secure the flat tire and
return the jack and tools to their proper
storage locations.

Emergency situations
8-18
NOTICE
Check the tire pressure as soon as
possible after installing a spare tire.
Adjust it to the recommended pressure.
CAUTION
Your vehicle has metric threads on the
studs and wheel bolts. Make certain
during tire changing that the same bolts
that were removed are reinstalled. If
you have to replace your wheel bolts
make sure they have metric threads to
avoid damaging the studs and ensure
the wheel is properly secured to the
hub. We recommend that you consult
an authorized HYUNDAI dealer for
assistance.
WARNING
Wheel studs
If the studs are damaged, they may lose
their ability to retain the wheel. This
could lead to the loss of the wheel and a
collision resulting in serious injuries.
If any of the equipment such as the jack,
wheel bolts, studs, or other equipment
is damaged or in poor condition, do not
attempt to change the tire and call for
assistance.
Use of compact spare tires
Compact spare tires are designed for
emergency use only. Drive carefully on
the compact spare tire and always follow
the safety precautions.
WARNING
To prevent compact spare tire failure
and loss of control possibly resulting in
an accident:
• Use the compact spare tire only in an
emergency.
• NEVER operate your vehicle over 50
mph (80 km/h).
• Do not exceed the vehicle’s
maximum load rating or the load
carrying capacity shown on the
sidewall of the compact spare tire.
• Do not use the compact spare tire
continuously. Repair or replace the
original tire as soon as possible to
avoid failure of the compact spare
tire.

Emergency situations
8-22
When towing your vehicle in an
emergency without wheel dollies:
1. Release EPB before turning off the
engine.
2. Place the ignition switch to the OFF
position.
3. Change the gear to N (Neutral) while
pressing the brake pedal.
4. Place the ignition switch to the ACC
position.
CAUTION
Failure to shift the gear to N (Neutral)
may cause internal damage to the
transmission.
Removable towing hook
1. Open the tailgate, and remove the
towing hook from the tool case.
„„Front
ONX4080018
„„Rear
ONX4E080041
2. Remove the hole cover by pressing
the lower part of the cover on the
bumper.
3. Install the towing hook by turning it
clockwise into the hole until it is fully
secured.
4. Remove the towing hook and install
the cover after use.

08
8-23
Emergency towing
„„Front
ONX4080019
„„Rear
ONX4E080042If 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 working
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.
• Shift the gear to 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.