Contents: The operating principle of airbags ⬇ SRS warning light ⬇ Seat belts with automatic emergency…⬇
Warning: Do not place hard or sharp objects between your body and the airbags, do not carry hard or sharp objects on your lap, and do not smoke a pipe while driving, as this may result in serious injury in the event of an accident. To prevent the risk of unauthorized deployment of the airbags, try not to press your hands to the locations of the airbags and their modules. The locations of the airbags and inflatable curtains are marked with the words "AIRBAG".
The maximum configuration of the supplemental safety system (SRS) devices and components includes:
- driver's front airbag (in the steering wheel pad);
- front passenger front airbag (in the upper right part of the instrument panel);
- two side airbags in the outer parts of the front seat backs: to protect the head and torso of the driver and front passenger;
- two side airbags in the trim between the outer edges of the rear seat backrest and the rear doors: to protect the head and torso of the outer rear passengers;
- two side curtains to protect heads;
- driver's knee airbag (in the instrument panel, under the steering column).
- sRS control unit with integrated longitudinal acceleration sensor for front airbags;
- side impact sensors for side airbags (in the front doors and behind the lower trim of the C pillars of the body);
- automatic emergency front seat belt tensioners;
- automatic emergency tensioners for rear side seat belts (if there are rear side airbags);
- an electronic self-diagnostic system which, when the ignition is on, continuously tests the overload sensors, control unit, airbag gas generators, seat belt tensioner pyropatrons and the connecting electrical wiring of the corresponding circuits;
- front passenger airbag switch;
- sRS indicator lamp in the instrument cluster and front passenger airbag deactivation lamp (if there is an airbag switch).
Note: A description of the activation and deactivation of the front passenger airbags, as well as a description of the corresponding K/L, is given in Section 8.
The operating principle of airbags
Note: When the ignition is off, in minor frontal and side collisions, as well as in the event of a rollover or rear impact, the airbags do not deploy.
Directional overload sensors react to exceeding a certain deceleration limit that occurs during a strong frontal (with a direction deviation of no more than 30° relative to the longitudinal axis of the car) or side collision. Based on the sensor signal, the control unit switches on the airbag gas generators, causing them to instantly fill with gas.
During a collision, the seat belt keeps the lower part of the occupant's body from moving. Front airbags help prevent injury to the driver and front passenger when their heads and chests hit the steering wheel/instrument panel. Side airbags protect the chest and shoulders when they hit the pillars/door windows, and side curtain airbags are designed to protect the head when they hit the pillars/door windows.
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Both front airbags are deployed simultaneously, but it is possible that only one of the pair of airbags will be deployed - this becomes possible when the magnitude of the directional overloads that arose during the collision was on the edge of the sensitivity range of the sensors. In this case, the seat belts provide sufficiently reliable protection for the driver and front passenger, while the effect of the airbag deployment will be minimal. The side airbags and inflatable curtains are deployed only on the side of the impact.
Immediately after the airbags are triggered and perform their functions, the gas is released from them under body pressure, which allows the driver to maintain visibility and freely manipulate all vehicle controls.
The entire process from the moment the overload sensors send a signal to the release of gas from the airbags takes several milliseconds. The pyropatrons are triggered so quickly that the human ear is simply unable to perceive the pop of the gas generators when filling the airbags.
After the airbags have deployed, the interior of the car may appear slightly smoky due to the fine powder suspension that is usually sprinkled on the folded airbag shells. People with respiratory diseases may experience some discomfort from the gaseous products in the air emitted by the airbag gas generators.
Airbags are designed to deploy once and must be replaced after that. Airbag replacement, steering wheel, steering column and seat repairs must be performed by experienced, qualified mechanics.
SRS warning light
The SRS indicator lamp is mounted in the instrument cluster (see Section 13). When the ignition is turned on, the K/L lights up for about 4 seconds and then goes out, confirming the proper functioning of all SRS system components.
If the airbags are deactivated at the service station, after the ignition is turned on, the SRS K/L in the instrument cluster lights up for approximately 4 seconds, and then flashes at 2-second intervals for approximately 12 seconds.
If the K/L does not turn on, does not go out, flashes, or operates randomly at any other time, the car owner should contact service station specialists at the first opportunity, since with the above-mentioned signs the SRS system may fail during an accident.
Seat belts with automatic emergency tensioners
The front seat belts and, on some models, the outer rear seat belts are equipped with emergency automatic tensioners. The tensioners are activated by strong frontal overloads that occur during a frontal collision and provide instant selection of slack in the belts, as a result of which their tapes tightly encircle the body of the occupant, significantly increasing the level of protection. The overload threshold for the operation of emergency tensioners is lower than the overload threshold for the airbags.
The activation of the pyropatrons is accompanied by a loud bang and a small emission of smoke.
Note: The smoke released when the tensioners are activated is safe for human health, but when inhaled directly it can cause irritation of the mucous membranes.
The procedure for using such seat belts is similar to the procedure for using conventional belts equipped with inertial return devices. The tensioner mechanism does not require any additional skills or knowledge from the user.
As in the case of airbags, emergency tensioner modules are designed for a single activation and after that are subject to replacement together with the belts - contact a service station.