See also the information given in Chapter Manual.
General information
All models discussed in this manual are equipped with an additional security system (SRS). The system includes airbags (one or two front airbags [driver's seat standard on all models], two side airbags, two overhead airbags [optional], and emergency seatbelt pretensioners). The system provides additional protection for the driver and front passenger of the car in case of severe frontal and side impacts, as well as when the car rolls over (depending on configuration). The brain of the system is the SRS control unit, which includes self-diagnosis and feedback loops, the nerve endings are directional overload sensors and a control sensor in the unit. The unit is located under the instrument panel, directly in front of the center console. Directional g-force sensors and airbag modules are mounted in the central part of the steering wheel and the right side of the car's instrument panel (directly above the storage box).
Operating principle
A prerequisite for the activation of airbags and emergency belt tensioners is the operation of the directional overload sensors and the control sensor. The operation of the sensors leads to the circuit of the modules and the instantaneous filling of the airbags with gas, as well as to the activation of the emergency tensioner squibs. In the event of a battery failure, the operation of the system elements occurs due to the energy generated by the feedback node built into the SRS unit.
The frontal airbags and emergency belt tensioners deploy only in frontal collisions within the 30-degree sector and at a relative speed of at least 30 km/h.
System of self-diagnosis of failures SRS
The SRS self-diagnosis system turns on the warning lamp on the vehicle's instrument panel when the ignition key is turned to the ON position. If the system does not detect any abnormalities, the lamp should go out after approximately 6 seconds. If the indicator lamp does not turn off, or the lamp comes on while the vehicle is moving, then a malfunction has been detected in the SRS system. The corresponding diagnostic codes are recorded in the memory of the onboard processor and can be read using a special scanner-type reader connected to the car's DLC connector (see chapter Power and exhaust systems). To check the system and eliminate the causes of the identified failures, the car should be driven to a service station. For a list of the most common SRS trouble codes, see Specifications.
Maintenance of nodes located near SRS components
If it is necessary to remove the steering wheel or service the radio or other components located near the instrument panel, try not to allow the SRS circuit electrical connectors to be disconnected. Never connect any diagnostic equipment to the SRS circuit! ALWAYS DISABLE SRS PRIOR TO SERVICING ALL COMPONENTS NEAR THE AIRBAG (see below).
SRS circuit wiring is easily identified by the bright yellow color of the insulation.
Disabling the SRS system
The SRS system must be deactivated every time you perform maintenance procedures for components located near the airbags!
1. Turn off the ignition and all onboard electrical consumers. Disconnect the negative cable from the battery first, then the positive one. Wait at least 1 minute for the SRS emergency power supply capacitor to discharge before servicing components.
If the stereo system installed in the car is equipped with a security code, before disconnecting the battery, make sure that you have the correct combination to activate the audio system!
Precautionary measures
General Precautions
The following precautions must be taken before any service work is performed on SRS-equipped vehicles.
- Do not disconnect the battery while the engine is running;
- Before starting work near the location of the SRS elements, removing any components of the system, carrying out welding work on the vehicle, be sure to deactivate the system (see above);
- Do not attempt to diagnose the system using testers, multimeters or other measuring instruments;
- If the SRS warning light comes on, or a system malfunction is suspected, immediately drive the vehicle to a workshop for a detailed diagnosis of the SRS using special equipment. In no case do not try to diagnose or disassemble any system components yourself!
Precautions for handling airbags
- When carrying the airbag module, hold it facing away from you. airbag pillow up;
- Do not cover the module removed from the vehicle with your hands;
- Try not to drop or shake the module - if it falls from a height of more than 50 cm, the module must be replaced;
- Do not attempt to disassemble the module;
- Do not allow any electronic devices to come into contact with any electrical components of the SRS modules;
- Do not allow solvents or cleaning agents to come into contact with the airbag module - if necessary, wipe the surface of the module with a slightly damp cloth.
Airbag Storage Precautions
- Store the air bag module face up in a closed rack;
- Module storage temperature should not exceed 90°С;
- Do not approach the airbag module with an open flame;
- Airbags must be disposed of in accordance with local regulations;
- Never install an airbag on a vehicle without being absolutely sure that it is in good condition.
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