Sensors Hyundai Sonata 2020 Owner's Manual

03
3-39
Where Are the Air Bags?
Driver’s and passenger’s front air
bags
Your vehicle is equipped with an
Advanced Supplemental Restraint
System (SRS) and lap/shoulder belts at
both the driver and passenger seating
positions.
The SRS consists of air bags which are
located in the center of the steering
wheel, in the driver’s side lower crash
pad below the steering wheel column
and the passenger’s side front panel pad
above the glove box.
The air bags are labeled with the letters
“AIR BAG” embossed on the pad covers.
Driver’s front air bagDriver’s front air bag
ODN8039034ODN8039034
Driver’s knee air bagDriver’s knee air bag
ODN8039035ODN8039035
Passenger’s front air bagPassenger’s front air bag
ODN8039036ODN8039036
The purpose of the SRS is to provide the
vehicle’s driver and front passengers with
additional protection than that offered
by the seat belt system alone. The SRS
uses sensors to gather information about
the driver’s and front passenger’s seat
belt usage and impact severity. The seat
belt buckle sensors determine if the
driver and front passenger’s seat belts
are fastened. These sensors provide the
ability to control the SRS deployment
based on whether or not the seat belts
are fastened, and how severe the impact
is. The advanced SRS offers the ability to
control the air bag inflation within two
levels. A first stage level is provided for
moderate-severity impacts. A second
stage level is provided for more severe
impacts. According to the impact
severity, and seat belt usage, the SRS
Control Module (SRSCM) controls the
air bag inflation. Failure to properly
wear seat belts can increase the risk or
severity of injury in an accident.

Seats & Safety System3-42
WARNING
To reduce the risk of serious injury or
death from an inflating curtain air bag,
take the following precautions:
• All seat occupants must wear
seat belts at all times to help keep
occupants positioned properly.
• Properly secure child restraints as far
away from the door as possible.
• Do not place any objects over the air
bag. Also, do not attach any objects
around the area the air bag inflates
such as the door, side door glass,
front and rear pillar, roof side rail.
• Do not hang other objects except
clothes, especially hard or breakable
objects. In an accident, it may cause
vehicle damage or personal injury.
• Do not allow passengers to lean their
heads or bodies onto doors, put their
arms on the doors, stretch their arms
out of the window, or place objects
between the doors and seats.
• Do not open or repair the side curtain
air bags.
How Does the Air Bag System
Operate?
ODN8039033ODN8039033
The SRS consists of the following
components:
1. Driver’s front air bag module
2. Passenger’s front air bag module
3. Side air bag modules (front)
4. Curtain air bag modules
5. Retractor pre-tensioner assemblies
6. Air bag warning light
7. SRS control module (SRSCM) /
Rollover sensor
8. Front impact sensors
9. Side impact sensor (speed)
10. Side impact sensor (pressure)
11. Driver’s knee air bag module
12. Occupant classification system
13. Side air bag modules (rear)
The SRSCM (Supplemental Restraint
System Control Module) continually
monitors all SRS components while the
Engine Start/Stop button is in the ON or
START position to determine if a crash
impact is severe enough to require air
bag deployment or pre-tensioner seat
belt deployment.

03
3-43
SRS warning light
The SRS (Supplement Restraint System)
air bag w
arning light on the instrument
panel displays the air bag symbol
depicted in the illustration. The system
checks the air bag electrical system for
malfunctions. The light indicates that
there is a potential malfunction with your
air bag system, which could include your
side and curtain air bags used for rollover
protection.
WARNING
If your SRS malfunctions, the air bag
may not inflate properly during an
accident increasing the risk of serious
injury or death.
If any of the following conditions occur,
your SRS is malfunctioning:
• The light does not turn on for
approximately six seconds when the
Engine Start/Stop button is in the ON
position.
• The light stays on after illuminating
for approximately six seconds.
• The light comes on while the vehicle
is in motion.
• The light blinks when the engine is
running.
Have an authorized HYUNDAI dealer
inspect the SRS as soon as possible if
any of these conditions occur. During a frontal collision, sensors will
detect the vehicle’s deceleration. If the
rate of deceleration is high enough, the
control unit will inflate the front air bags.
The front air bags help protect the driver
and front passenger by responding to
frontal impacts in which seat belts alone
cannot provide adequate restraint. When
needed, the side air bags help provide
protection in the event of a side impact
or rollover.
• Air bags are activated (able to inflate
if necessary) when the Engine Start/
Stop button is in the ON position or
approximately within 3 minutes after
ignition off.
• Air bags inflate in the event of certain frontal or side collisions to help
protect the occupants from serious
physical injury.
• Generally, air bags are designed to inflate based upon the severity of
a collision, its direction, etc. These
two factors determine whether
the sensors produce an electronic
deployment/inflation signal.
• The front air bags will completely inflate and deflate in an instant. It is
virtually impossible for you to see the
air bags inflate during an accident. It is
much more likely that you will simply
see the deflated air bags hanging out
of their storage compartments after
the collision.

3-52
Seats & Safety System
Do Not Install a Child Restraint in the
Front Passenger’s Seat
OHI039193NOHI039193N
Even though your vehicle is equipped
with the OCS, never install a child
restraint in the front passenger’s seat.
An inflating air bag can forcefully strike a
child or child restraint resulting in serious
or fatal injury.
WARNING
•
NEVER place a rear-facing or front-
facing child restraint in the front
passenger’s seat of the vehicle.
• An inflating frontal air bag could
forcefully strike a child resulting in
serious injury or death.
• Always properly restrain children in
an appropriate child restraint in the
rear seat of the vehicle.
Why Didn’t My Air Bag Go Off in
a Collision?
Air bags are not designed to inflate in
every collision. There are certain types
of accidents in which the air bag would
not be expected to provide additional
protection. These include rear impacts,
second or third collisions in multiple
impact accidents, as well as low speed
impacts. Damage to the vehicle indicates
a collision energy absorption, and is not
an indicator of whether or not an air bag
should have inflated.
WARNING
To reduce the risk of an air bag
deploying unexpectedly and causing
serious injury or death:
• Do not hit or allow any objects to
impact the locations where air bags
or sensors are installed.
• Do not perform maintenance on or
around the air bag sensors. If the
location or angle of the sensors is
altered, the air bags may deploy
when they should not or may not
deploy when they should.
• Do not install bumper guards or
replace the bumper with a non-
genuine HYUNDAI parts. This may
adversely affect the collision and air
bag deployment performance.
• Place the ignition switch in the
LOCK/OFF or ACC position when the
vehicle is being towed to prevent
inadvertent air bag deployment.
• Have all air bag repairs conducted by
an authorized HYUNDAI dealer.

3-53
03
Air bag collision sensors
ODN8A039044/ODN8039045/ODN8A039046/ODN8A039047/ODN8039061ODN8A039044/ODN8039045/ODN8A039046/ODN8A039047/ODN8039061
1. SRS control module/Rollover sensor
2. Front impact sensor
3. Side pressure sensor
4. Side impact sensor

Seats & Safety System3-54
Air bag inflation conditions
ODN8039048LODN8039048L
Front air bags
Front air bags are designed to inflate
in a fr
ontal collision depending on the
severity of impact of the front collision.
ODN8A039049ODN8A039049
ODN8039050ODN8039050
Side and curtain air bags
Side and curtain air bags are designed
t
o inflate when an impact is detected by
side collision sensors depending on the
severity of impact resulting from a side
impact collision.
Although the driver’s and front
passenger’s air bags are designed to
inflate only in frontal collisions, they also
may inflate in other types of collisions
if the front impact sensors detect a
sufficient impact. Side and curtain air
bags are designed to inflate only in side
impact collisions or rollover situations,
but they may inflate in other collisions
if the side impact sensors detect a
sufficient impact.
If the vehicle chassis is impacted by
bumps or objects on unimproved roads,
the air bags may deploy. Drive carefully
on unimproved roads or on surfaces not
designed for vehicle traffic to prevent
unintended air bag deployment.
Air bag non-inflation conditions
ODN8039051LODN8039051L
In certain low-speed collisions the air
bags may not deploy. The air bags are
designed not to deploy in such cases
because they may not provide benefits
beyond the protection of the seat belts.

03
3-55
ODN8039052LODN8039052L
Front air bags are not designed to inflate
in rear collisions, because occupants
are moved backward by the force of the
impact. In this case, inflated air bags
would not provide any additional benefit.
ODN8A039053ODN8A039053
Front air bags may not inflate in side
impact collisions, because occupants
move in the direction of the collision,
and thus in side impacts, front air bag
deployment would not provide additional
occupant protection.
However, side and curtain air bags may
inflate depending on the severity of
impact.
ODN8039059ODN8039059
In an angled collision, the force of impact
may direct the occupants in a direction
where the air bags would not be able to
provide any additional benefit, and thus
the sensors may not deploy any air bags.
ODN8039054ODN8039054
Just before impact, drivers often brake
heavily. Such heavy braking lowers the
front portion of the vehicle causing it
to “ride” under a vehicle with a higher
ground clearance. Air bags may not
inflate in this “underride” situation
because deceleration forces that are
detected by sensors may be significantly
reduced by such “underride” collisions.

05
5-11
Start-up
You can start the vehicle without
inserting the key.
For information, refer to the “Engine
Start/Stop Button” section in chapter 6.
NOTICE
To prevent damaging the smart key:
• Keep the smart key in a cool,
dry place to avoid damage or
malfunction. Exposure to moisture
or high temperature may cause
the internal circuit of the smart key
to malfunction which may not be
covered under warranty.
• Avoid dropping or throwing the
smart key.
• Protect the smart key from extreme
temperatures.
Remote start
You can start the vehicle using the
Remote Start button (7) of the smart key.
To start the vehicle remotely:
• Lock the doors by pressing the door
lock button within 32 feet (10 m)
distance from the vehicle.
• Press the remote start button for over 2 seconds within 4 seconds after
locking the doors and the hazard
warning will blink.
To turn off the remote start function, press
the remote start button once. In case of
the manual operation, the climate control
system will be maintained even when
the engine is turned OFF. However, the
automatic operation is set to 72°F (22°C).
Remote smart parking assist (RSPA)
(if equipped)
The Remote smart parking assist (RSPA)
system helps the drivers park their
vehicle by using sensors to measure
parking spaces and control the steering
wheel, gear shift and vehicle speed to
semi-automatically park the vehicle.
With the smart key, the driver can move
the vehicle forward or backward using
the rearward /forward buttons (5, 6) on
the smart key.
For information, refer to “Remote smart
parking assist (RSPA)” in this chapter.

Convenient Features5-36
Rear Occupant Alert (ROA)
System
The Rear Occupant Alert (ROA) system
is provided to help prevent exiting the
vehicle with the rear passenger left in the
vehicle. When you open the front door
after opening and closing the rear door
and turning off the engine, the “Check
rear seats” warning message appears on
the cluster.
ClusterCluster
ODN8A059339ODN8A059339
Steering wheelSteering wheel
ODN8A059134ODN8A059134
CAUTION
• The system does not actually detect
objects or people in the rear seat. By
using a rear door opened and closed
history, the system indicates that
there may be something in the rear
seat.
• The rear door opened and closed
history will be initialized only when
the doors are locked after turning off
the engine. Therefore, there could be
alarms even though the back doors
are locked.
ex) When you get in and drive your vehicle without locking the doors after
the alarm sounds, there could be the
alarm sounds if you turn off the engine
and open the driver’s seat door.
WARNING
It does not use the actual sensors but it
provides the alarm sounds by checking
the rear door lock/unlock status as a
reminder.

05
5-89
Reverse Parking Collision-Avoidance
Assist (PCA) is a supplemental system
that can warn the driver or apply braking
force to reduce the possibility of collision
with pedestrians when the vehicle is
reversing.
WARNING
• Always look around your vehicle to
make sure there are no objects or
pedestrian before moving the vehicle
in any direction to prevent a collision.
• Do not solely rely on Reverse Parking
Collision-Avoidance Assist system.
The system might not assist the
driver leading to pedestrian injury or
vehicle damage.
• Be aware that some objects may
not be visible on the screen or be
detected by the rear ultrasonic
sensors, due to the objects’ distance,
size or material, all of which can limit
the effectiveness of the sensors.
System Setting and Operation
System setting
Parking Collision-Avoidance Assist-
Reverse (PCA-R) can be activated from
the Settings menu in the LCD display or
infotainment system display by following
the procedure below.
1. Set the Engine Start/Stop button to
the ON or START position.
2. Select ‘User Settings → Driver Assistance → Parking Safety → Active
Assist / Warning Only / Off’ in the
LCD display or infotainment system
display.
- The system is ready for operation when ‘Active Assist’ is selected. In
the event of an imminent collision
with a pedestrian or an object, the
system warns the driver or applies
braking force to help avoid the
collision.
- The system is ready for operation when ‘Warning Only’ is selected. In
the event of an imminent collision
with a pedestrian, the system warns
the driver but does not assist in
braking.
- The system deactivates when ‘Off’ is selected.
REVERSE PARKING COLLISION-AVOIDANCE ASSIST