General information about the Supplementary Restraint System (SRS)

FEATURES OF THE DEVICE
The security system (SRS) of the Skoda Octavia car combines frontal airbags for the driver and passenger in the front seat, as well as inertia seat belts for the driver and all passengers. The seat belts for the driver and front passenger are equipped with pyrotechnic pretensioners. installed in coils. In a variant, the car is additionally equipped with side airbags and curtain airbags, as well as an airbag to protect the driver's knees.
WARNINGS
Airbags do not replace seat belts. Moreover, when the car is moving, the driver and front passenger must be sure to wear their seat belts, since in the event of a traffic accident, a deployed airbag itself can cause serious injury to a person who is not wearing a seat belt. In addition, passengers in the rear seat must be fastened with seat belts. In the event of an accident, an unbelted passenger in the rear seat can cause injury and serious injury to all passengers in the vehicle.
The SRS system includes the following elements:

- a driver's airbag module located in the steering wheel hub and consisting of a folded airbag shell and an inflator;

- the front passenger airbag module (installed depending on the vehicle configuration), located 8 on the instrument panel on the passenger side and consisting of a folded airbag shell and a gas generator;

- an electronic control unit installed under the lining of the floor tunnel and controlling the system;

seat belts.
The strength and direction of impact in a traffic accident is determined by the electronic control unit (ECU) of the passive safety system using electronic accelerometers. At the signal of the accelerometers, the control unit activates the airbags for the driver and passenger.
Upon impact of a certain force, the ECU, having received signals from the impact sensors, before activating the airbags, increases the tension of the belts, issuing a command to the pyrotechnic elements of the pretensioners. The latter provide a timely response to an emergency deceleration of the car, pulling the driver and passenger to the seat backs, and exclude their further movement by inertia forward or sideways and getting injured from a deployed airbag.
NOTE
The seat belt pretensioner mechanism is always activated before the airbag.
Additional elements of the passive safety system also include head restraints mounted on the backs of the driver's seat, front passenger's seat and on the back of the rear seat. The head restraints prevent damage to the cervical vertebrae of occupants in the event of a severe rear impact or airbag deployment.
This subsection describes the removal and installation of the passive safety system control unit, the removal and installation of seat belts, as well as the driver and front passenger airbags, since the driver's airbag must be removed for work related to steering repair, and the front passenger's airbag - when replacing the instrument panel. Side airbags and curtain airbags should only be removed by a workshop with specially trained personnel.

See also: Temperature sensor Skoda Octavia. Skoda Octavia cabin air filter replacement.

Source: http://skoda-octavia2.ru/index.php/sistema-bezopasnosti/294-sistema-passivnoj-bezopasnosti-srs.html