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8.3.1. General information

Fig. 8.41. Security system components



The system of additional passive safety (SRS) is developed for use together with seat belts to increase safety level at the road accidents and to reduce risk of traumatizing at operation of frontal and side inflatable safety cushions by deduction of forward passengers on seats in case of front or side blow.
The system of additional passive safety (SRS) consists of the following elements: a frontal inflatable safety cushion of the driver (it is located in the center of a steering wheel), which contains the module with the put safety cushion and the inflatable device (gas generator); a frontal inflatable safety cushion of the forward passenger (it is located in the dashboard from the passenger), which contains the module with the put safety cushion and the inflatable device (gas generator); the side inflatable safety cushions (located in external sidewalls of seatbacks of the driver and forward passenger), each of which contains the module with the put safety cushion and the inflatable device (gas generator); SRS electronic control unit (it is established under the central part of the floor console), which operates all system; the sensor of acceleration (accelerometer) which defines delay of the car (blow existence outside); the hour spring of intermediate connection located in a steering column; electrical wiring and sockets of system; the knee buffer (knee bolster) located under a steering column. Blow recognition function outside in an electronic control unit of SRS is performed by the electronic sensor of acceleration which constantly measures acceleration of the car and transmits the corresponding signal through the strengthening and filtering chains to the microprocessor. The system of additional passive safety (SRS) is developed in such a way that inflatable safety cushions will work in case of accident at front or close to front blows of various force (from averages to strong).
To work on service of systems of additional passive safety (SRS), and also the related elements, only the qualified personnel is allowed. Before work the service personnel have to study this manual carefully. It is necessary to show extra care at service of the SRS system to avoid traumatizing or the death of service personnel (as a result of unauthorized operation of a safety cushion), or the driver (as a result of not operability of the SRS system after unqualified service or repair).