2018 Hyundai Elantra sensor

2-24
Safety system of your vehicle
The Pre-Tensioner Seat Belt System
consists mainly of the following compo-
nents. Their locations are shown in the
illustration above:
1. SRS air bag warning light
2. Retractor pre-tensioner
3. SRS control module
4. Emergency Fastening Device SystemThe sensor that activates the SRS air
bag is connected with the pre–ten-
sioner seat belts. The SRS air bag
warning light on the instrument panel
will illuminate for approximately 6 sec-
onds after the ignition switch is in the
ON position, and then it should turn
off.
If the pre-tensioner is not working
properly, the warning light will illumi-
nate even if the SRS air bag is not mal-
functioning. If the warning light does
not illuminate, stays illuminated or
illuminates when the vehicle is being
driven, have an authorized HYUNDAI
dealer inspect the pre-tensioner seat
belts and SRS air bags as soon as
possible.
NOTICE
Do not touch the pre-tensioner seat
belt assemblies for several minutes
after they have been activated.
When the pre-tensioner seat belt
mechanism deploys during a colli-
sion, the pre-tensioners become
hot and can burn you.
WARNING
OLMB033040/Q

2-40
Safety system of your vehicle
Where Are the Air Bags?
Driver's and passenger's frontair bags
Your vehicle is equipped with a
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. 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 infor-
mation about the driver’s and front pas-
senger'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 pro-
vide the ability to control the SRS deploy-
ment 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 lev-
els. A first stage level is provided for mod-
erate-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.
OAD035034
OAD035035
OAD035039
■Driver's knee air bag
■Driver's front air bag
■Passenger's front air bag

2-43
Safety system of your vehicle
2
The curtain air bags are designed to
deploy only during certain side impact
collisions, depending on the crash sever-
ity, angle, speed and impact.
The side and curtain air bags on both
sides of the vehicle may deploy if a
rollover or possible rollover is detected.
The curtain air bags are not designed to
deploy in all side impact or rollover situa-
tions.How Does the Air Bag System
Operate?
The SRS consists of the following com-
ponents:
1. Driver's front air bag module
2. Passenger's front air bag module
3. Side air bag modules
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 sensors
10. Side pressure sensors
11. Driver's knee air bag module
To reduce the risk of serious injury
or death from an inflating curtain
air bags, take the following precau-
tions:
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 pos-
sible.
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 pil-
lar, roof side rail.
(Continued)
(Continued)
Do not hang other objects except
clothes, especially hard or break-
able 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 win-
dow, or place objects between
the doors and seats.
Do not open or repair the side
curtain air bags.
WARNING
OAD035074N

2-44
Safety system of your vehicle
12. Emergency Fastening DeviceSystem
13. Occupant classification system
The SRSCM (Supplemental Restraint
System Control Module) continually
monitors all SRS components while the
ignition switch is in the ON position to
determine if a crash impact is severe
enough to require air bag deployment or
pre-tensioner seat belt deployment.
SRS warning light
The SRS (Supplement Restraint System)
air bag warning light on the instrument
panel displays the air bag symbol depict-
ed in the illustration. The system checks
the air bag electrical system for malfunc-
tions. 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 pro-
tection. 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) only when the ignition
switch is in the ON position.
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 col-
lision, its direction, etc. These two fac-
tors determine whether the sensors
produce an electronic deployment/
inflation signal.
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 ignition switch is in the ON
position.
The light stays on after illuminat-
ing for approximately six sec-
onds.
The light comes on while the
vehicle is in motion.
The light blinks when the engine
is running.
Have an authorized HYUNDAI deal-
er inspect the SRS as soon as pos-
sible if any of these conditions
occur.
WARNING

2-45
Safety system of your vehicle
2
Air bag deployment depends on anumber of factors including vehicle
speed, angles of impact and the densi-
ty and stiffness of the vehicles or
objects which your vehicle impacts
during a collision. The determining fac-
tors are not limited to those mentioned
above.
The front air bags will completely inflate and deflate in an instant. It is vir-
tually 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.
In addition to inflating in certain side collisions, vehicles equipped with a
rollover sensor, side and curtain air
bags will inflate if the sensing system
detects a rollover.
When a rollover is detected, side and
curtain air bags will remain inflated
longer to help provide protection from
ejection, especially when used in con-
junction with the seat belts. To help provide protection, the air bags
must inflate rapidly. The speed of air
bag inflation is a consequence of
extremely short time in which to inflate
the air bag between the occupant and
the vehicle structures before the occu-
pant impacts those structures. This
speed of inflation reduces the risk of
serious or life-threatening injuries and
is thus a necessary part of air bag
design.
However, the rapid air bag inflation can
also cause injuries which can include
facial abrasions, bruises and broken
bones because the inflation speed also
causes the air bags to expand with a
great deal of force.
There are even circumstances under which contact with the air bag can
cause fatal injuries, especially if the
occupant is positioned excessively
close to the air bag.
You can take steps to help reduce the
risk of being injured by an inflating air
bag. The greatest risk is sitting too close
to the air bag. An air bag needs about 10
inches (25 cm) of space to inflate.
NHTSA recommends that drivers allow
at least 10 inches (25 cm) between the
center of the steering wheel and the
chest. To reduce the risk of serious injury
or death from an inflating air bag,
take the following precautions:
NEVER place a child restraint in
the front passenger seat.
Always properly restrain children
under age 13 in the rear seats of
the vehicle.
Adjust the front passenger’s and
driver's seats as far to the rear as
possible while allowing you to
maintain full control of the vehi-
cle.
Hold the steering wheel with
hands at the 9 o'clock and 3
o'clock positions.
Never place anything or anyone
between the air bag and the seat
occupant.
Do not allow the front passenger
to place their feet or legs on the
dashboard.
WARNING

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Safety system of your vehicle
Occupant Classification
System (OCS)
Your vehicle is equipped with an
Occupant Classification System (OCS) in
the front passenger's seat.
Main components of theOccupant Classification System
A detection device located within the
front passenger seat cushion.
Electronic system to determine whether the passenger air bag sys-
tems should be activated or deactivat-
ed.
An indicator light located on the instru- ment panel which illuminates the
words "PASSENGER AIR BAG OFF"
indicating the front passenger air bag
system is deactivated.
The instrument panel air bag indicator light is interconnected with the OCS.
The OCS is designed to detect the pres-
ence of a properly-seated front passen-
ger and determine if the passenger's
front air bag should be enabled (may
inflate) or not.
The purpose is to help reduce the risk of
injury or death from an inflating air bag to
certain front passenger seat occupants,
such as children, by requiring the air bag
to be automatically turned OFF.
For example, if a child restraint of the
type specified in the regulations is on the
seat, the occupant classification sensor
can detect it and cause the air bag to turn
OFF. Front passenger seat adult occupants
who are properly seated and wearing the
seat belt properly, should not cause the
passenger air bag to be automatically
turned OFF. For small adults it may be
turned OFF, however, if the occupant
does not sit in the seat properly (for
example, by not sitting upright, by sitting
on the edge of the seat, or by otherwise
being out of position), this could cause
the sensor to turn the air bag OFF.
You will find the "PASSENGER AIR BAG
OFF" indicator on the center fascia
panel. This system detects the conditions
1-4 in the following table and activates or
deactivates the front passenger air bag
based on these conditions.
OAD035037
OAD035038
■
Type A
■Type B

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Safety system of your vehicle
2
ODH035900K
ODH035901K
ODH035902K
ODH035903K
Do not sit on the passenger
seat wearing heavily padded
clothes such as ski wear and
hip protector.
Do not use car seat acces-
sories such as thick blan-
kets and cushions which
cover up the car seat sur-
face.
Do not place electronic
devices such as laptops,
DVD player, or conductive
materials such as water bot-
tles on the passenger seat.
Do not use electronic
devices such as laptops and
satellite radios which use
inverter chargers.
If large quantity of liquid has
been spilled on the passen-
ger seat, the air bag warning
light may illuminate or mal-
function.
Therefore, make sure the
seat has been completely
dried before driving the vehi-
cle.
Do not place sharp objects on the front passenger seat. These may damage the occupant detection system, if they
puncture the seat cushion.
Do not place any items under the front passenger seat.
When changing or replacing the seat or seat cover, use original items only. The OCS has been developed based on
using original HYUNDAI car seats only. Altering or changing the authentic parts may result in system malfunction
and increase risk of injury when in collision. Any of the above could interfere with the proper operation of the OCS
sensor thereby increasing the risk of an injury in an accident.
(Continued)

2-53
Safety system of your vehicle
2
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 protec-
tion. These include rear impacts, second
or third collisions in multiple impact acci-
dents, as well as low speed impacts.
Damage to the vehicle indicates a colli-
sion energy absorption, and is not an
indicator of whether or not an air bag
should have inflated.
Air bag collision sensors
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.
WARNING
To reduce the risk of an air bag
deploying unexpectedly and caus-
ing 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 sen-
sors 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 perform-
ance.
Place the ignition switch in the
LOCK/OFF or ACC position when
the vehicle is being towed to pre-
vent inadvertent air bag deploy-
ment.
Have all air bag repairs conduct-
ed by an authorized HYUNDAI
dealer.
WARNING