Brake system Hyundai Sonata 2020 Repair Manual

While Driving6-64
Warning Light and Message
Type AType AType BType B
OIK057121NOIK057121NOIK057122NOIK057122N
Check LKA (Lane Keep Assist) system
If there is a problem with the system a
message will appear f
or a few seconds.
If the problem continues LKA system
failure indicator will illuminate.
LKA system indicator
The LKA system indicator
(yellow) will illuminate if LKA
system is not working properly.
Have the vehicle inspected by an
authorized HYUNDAI dealer.
When there is a problem with the system
do one of the following:
• Turn the system on after turning the v
ehicle off and on again.
• Check if the ignition switch is in the ON position.
• Check if the system is affected by the weather. (ex: fog, heavy rain, etc.)
• Check if there is foreign matter on the camera lens.
If the problem is not solved, have the
vehicle inspected by an authorized
HYUNDAI dealer. LKA system will not be in the ENABLED
state and the steering wheel will not be
assisted when:
• The turn signal is turned on before
changing a lane. If y
ou change
lanes without the turn signal on, the
steering wheel might be controlled.
• The vehicle is not driven in the middle of the lane when the system is turned
on or right after changing a lane.
• ESC (Electronic Stability Control) or VSM (Vehicle Stability Management)
is activated.
• The vehicle is driven on a sharp curve.
• Vehicle speed is below 40 mph (64 km/h) and over 110 mph (177 km/h).
• The vehicle makes sharp lane changes.
• The vehicle brakes suddenly.
• Only one lane marker is detected.
• The lane (or road width) is very wide or narrow.
• There are more than two lane markers on the road. (e.g. construction area)
• The vehicle is driven on a steep incline.
• The steering wheel is turned suddenly.
• The system may not operate for 15 seconds after the engine is started or
the camera is initialized.

06
6-71
WARNING
• The warning light on the side view
mirror will illuminate whenever a
vehicle is detected at the rear side by
the system.
To avoid accidents, do not focus only
on the warning light and neglect to
see the surrounding of the vehicle.
• Drive safely even though the
vehicle is equipped with Blind-Spot
Collision-Avoidance Assist system.
Do not solely rely on the system
but check your surrounding before
changing lanes or backing the
vehicle up.
• The system may not alert the driver
in some conditions so always check
your surroundings while driving.
CAUTION
• The driver should always use
extreme caution while operating
the vehicle, whether or not the
warning light on the side view mirror
illuminates or there is a warning
alarm.
• Playing the vehicle audio system at
high volume may offset the Blind-
Spot Collision Warning system
warning sounds.
• The warning of Blind-Spot Collision-
Avoidance Assist system may not
sound while other system’s warning
sounds.
Blind-Spot Collision-Avoidance
Assist
Blind-Spot Collision-Avoidance Assist
system may apply braking power, when
an approaching vehicle is detected
within a certain distance next to or
behind your vehicle.
It gently applies braking power on the
tire, which is located in the opposite
side of the possibly-colliding point. The
instrument cluster will inform the driver
of the system activation.
Blind-Spot Collision-Avoidance Assist
system is automatically deactivated
when:
- The vehicle drives a certain distance away
- The vehicle direction is changed against the possible-colliding point
- The steering wheel is abruptly moved
- The brake pedal is depressed
- After a certain period of time
The driver should drive the vehicle in the
middle of the vehicle lanes to keep the
system in the ready status.
When the vehicle drives too close to one
side of the vehicle lanes, the system may
not properly operate.
In addition, the system may not properly
control your vehicle in accordance with
driving situations. Thus, always pay close
attention to road situations.

While Driving6-88
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(1) Cruise indicator
(2) Set speed
(3) Vehicle-to-vehicle distance
To see the SCC screen on the LCD display
in the cluster, select Driving Assist mode
(
). For more information, refer to "LCD
Display Modes" section in chapter 4.
Smart Cruise Control system allows you
to program the vehicle to help maintain
the desired speed and minimum distance
between the vehicle ahead.
Smart Cruise Control system will
automatically adjust your vehicle speed
to maintain your programmed speed
and following distance without requiring
you to depress the accelerator or brake
pedals.
WARNING
For your safety, please read the owner's
manual before using Smart Cruise
Control system.
WARNING
Smart Cruise Control system is not a
substitute for safe driving practices, but
a convenience function only. It is the
responsibility of the driver to always
check the speed and distance to the
vehicle ahead.
WARNING
Take the following precautions:
• Always set the vehicle speed under
the speed limit in your country.
• If Smart Cruise Control is left on,
(cruise (
) indicator
light in the instrument cluster is
illuminated) Smart Cruise Control
can be activated unintentionally.
Keep Smart Cruise Control system
off (cruise (
) indicator
light OFF) when Smart Cruise Control
is not in use, to avoid inadvertently
setting a speed.
• Use Smart Cruise Control system only
when traveling on open highways in
good weather.
SMART CRUISE CONTROL (SCC) (IF EQUIPPED)

06
6-89
• Do not use Smart Cruise Control
when it may not be safe to keep the
vehicle at a constant speed:
- When driving in heavy traffic or
when traffic conditions make it
difficult to drive at a constant
speed
- When driving on rainy, icy, or
snow-covered roads
- When driving on a steep downhill
or uphill
- When driving in windy areas
- When driving in parking lots
- When driving near crash barriers
- When driving on a sharp curve
- When driving with limited view
(possibly due to bad weather, such
as fog, snow, rain or sandstorm)
- When the vehicle sensing
ability decreases due to vehicle
modification resulting level
difference of the vehicle's front
and rear
• Unexpected situations may lead to
possible accidents. Pay attention
continuously to road conditions
and driving even when smart cruise
control system is being operated.Smart Cruise Control Switch
CRUISE/:Turns cruise control system
on or off.
RES+: Resumes or increases cruise control speed.
SET-: Sets or decreases cruise control speed.
:
Sets vehicle-to-vehicle distance.
CANCEL (CNCL): Cancels cruise control operation.
To Convert to Cruise Control
Mode
The driver may choose to only use the
conventional Cruise Control mode
(speed control function) by doing as
follows:
1. Turn Smart Cruise Control system on (the cruise indicator light will be on
but the system will not be activated).
2. Push and hold the Vehicle-to-Vehicle Distance button for more than 2
seconds.
3. Choose between “Smart Cruise Control” and “Cruise Control”.
When the system is canceled using the
CRUISE/
button or the CRUISE button
is used after the engine is turned on, the
Smart Cruise Control mode will turn on.
WARNING
When using the Cruise Control mode,
you must manually adjust the distance
to other vehicles by depressing the
brake pedal. The system does not
automatically adjust the distance to
vehicles in front of you.

While Driving6-92
To temporarily accelerate with
Smart Cruise Control on
If you want to speed up temporarily
when Smart Cruise Control is on, depress
the accelerator pedal. Increased speed
will not interfere with Smart Cruise
Control operation or change the set
speed.
To return to the set speed, take your foot
off the accelerator pedal.
If you push the toggle switch down
(SET-) at increased speed, the set speed
is updated.
Information
Be careful when accelerating temporarily,
because the speed is not controlled
automatically at this time even if there is a
vehicle in front of you.
Smart Cruise Control will be
temporarily canceled when:
ODN8069048ODN8069048
Cancelled manually
• Depressing the brake pedal.
• Pushing the CANCEL (CNCL) button located on the steering wheel.
Smart Cruise Control turns off
temporarily when the Set Speed and
Vehicle-to-Vehicle Distance indicator on
the LCD display turns off.
The cruise indicator (
) is illuminated
continuously.
Cancelled automatically
• The driver’s door is opened.
• The vehicle is shifted to N (Neutral), R (Reverse) or P (Park).
• The parking brake is applied.
• The vehicle speed is over 120 mph (190 km/h).
• The ESC (Electronic Stability Control), TCS (Traction Control System) or ABS
is operating.
• The ESC is turned off.
• The sensor or the cover is dirty or blocked with foreign matter.
• The vehicle is stopped for a certain period of time.

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• The vehicle is stopped for more than 5 minutes.
• The vehicle stops and goes repeatedly for a long period of time.
• The accelerator pedal is continuously depressed for a long period of time.
• The accelerator pedal is continuously depressed for more than one minute.
• The engine performance is abnormal.
• Engine rpm is in the red zone.
• The driver starts driving by pushing the toggle switch up (RES+)/down
(SET-) or depressing the accelerator
pedal, after the vehicle is stopped by
Smart Cruise Control system with no
other vehicle ahead.
• The driver starts driving by pushing the toggle switch up (RES+)/down
(SET-) or depressing the accelerator
pedal, after stopping the vehicle with
a vehicle stopped far away in front.
• Forward Collision-Avoidance Assist is activated.
• The engine speed is in dangerous range.
• When engine is stopped by ISG (Idle Stop & Go).
Each of these actions will cancel the
Smart Cruise Control operation. The Set
Speed and Vehicle-to-Vehicle Distance
on the LCD display will go off.
In a condition Smart Cruise Control is
cancelled automatically, Smart Cruise
Control will not resume even though the
RES+ or SET- toggle switch is pushed. Information
If Smart Cruise Control is cancelled by
other than the reasons mentioned, have
the vehicle inspected by an authorized
HYUNDAI dealer.
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Smart Cruise Control cancelled
If the system is cancelled, the warning
chime will sound and a message will
appear f

or a few seconds.
You must adjust the vehicle speed by
depressing the accelerator or brake
pedal according to the road condition
ahead and driving condition.
Always check the road conditions. Do not
rely on the warning chime.

While Driving6-96
Smart Cruise Control Vehicle-to-
Vehicle Distance
To set Vehicle-to-Vehicle Distance
ODN8069049ODN8069049
When Smart Cruise Control system
is ON, you can set and maintain the
distance from the vehicle ahead of you
without pressing the accelerator or brake
pedal.
Each time the button is pressed, the
vehicle to vehicle distance changes as
follows:Distance 4 Distance 3
Dis
tance 1Distance 2
For example, if you drive at 56 mph (90
km/h), the distance is maintained as
follows:
Distance 4 - approximately 172 feet
Distance 3 - approximately 130 feet
Distance 2 - approximately 160 feet
Distance 1 - approximately 82 feet
When the lane ahead is clear:
ODN8A069050ODN8A069050
The vehicle speed will maintain the set
speed.

06
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When there is a vehicle ahead of you
in your lane:
Distance 4Distance 3ODN8A069051ODN8A069051ODN8A069053ODN8A069053
Distance 2 Distance 1ODN8A069052ODN8A069052ODN8A069054ODN8A069054
Your vehicle speed will slow down or
speed up to maintain the selected
distance.
If the vehicle ahead speeds up, your
vehicle will travel at a steady cruising
speed after accelerating to the set speed.
If distance from the front vehicle has
been changed due to accelerating or
decelerating of the front vehicle, the
distance on the LCD display may change.
WARNING
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When using Smart Cruise Control
system:
• The warning message appears and
warning chime sounds if the vehicle
is unable to maintain the selected
distance from the vehicle ahead.
• If the warning message appears and
warning chime sounds, depress the
brake pedal to actively adjust the
vehicle speed, and the distance to
the vehicle ahead.
• Even if the warning message does
not appear and warning chime does
not sound, always pay attention to
the driving conditions to prevent
dangerous situations from occurring.
• Playing the vehicle audio system at
high volume may prevent occupants
from hearing the system warning
sounds.

06
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Limitations of the System
Smart Cruise Control system may have
limits to its ability to detect distance to
the vehicle ahead due to road and traffic
conditions.
On curves
OADAS014SDOADAS014SD
• Smart Cruise Control system may not detect a moving vehicle in your
lane, and then your vehicle could
accelerate to the set speed. Also, the
vehicle speed will decrease when the
vehicle ahead is recognized suddenly.
• Select the appropriate set speed on curves and apply the brakes or
accelerator pedal if necessary.
OADAS015SDOADAS015SD
Your vehicle speed can be reduced due
to a vehicle in the adjacent lane.
Apply the accelerator pedal and select
the appropriate set speed. Check to be
sure that the road conditions permit safe
operation of Smart Cruise Control.
On inclines
OADAS012SDOADAS012SD
• During uphill or downhill driving, Smart Cruise Control system may not
detect a moving vehicle in your lane,
and cause your vehicle to accelerate
to the set speed. Also, the vehicle
speed will rapidly decrease when the
vehicle ahead is recognized suddenly.
• Select the appropriate set speed on inclines and apply the brake or
accelerator pedal if necessary.

06
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OAE056108OAE056108
• Your vehicle may accelerate when a vehicle ahead of you disappears.
• When you are warned that the vehicle ahead of you is not detected, drive
with caution.
ODN8A069222ODN8A069222
• When driving in stop-and-go traffic, and a vehicle in front of you merges
out of the lane, the system may not
immediately detect the new vehicle
that is now in front of you. In this case,
you must maintain a safe braking
distance, and if necessary, depress
the brake pedal to reduce your driving
speed in order to maintain a safe
distance.
OHI058323LOHI058323L
• Always look out for pedestrians when your vehicle is maintaining a distance
with the vehicle ahead.
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• Always be cautious for vehicles with higher height or vehicles carrying
loads that sticks out from the back of
the vehicle.