Structure and Composition
1)Frontal Airbag
(1)Driver’s Safety Airbag Assembly.The driver’s safety airbag is installed in the steering wheel and the cover of airbag is marked with“AIR BAG”,as shown in Fig.3.48.
Fig.3.48 Driver’s Safety Airbag Assembly
(2)Co-pilot’s Safety Airbag Assembly.The co-pilot’s safety airbag is installed in the instrument panel above the glove box and the cover of airbag is marked with“AIR BAG”,as shown in Fig.3.49.
Fig.3.49 Co-pilot’s Safety Airbag Assembly
(3)Safety airbag is composed of fusing device,gunpowder(gas generator),air bag and support rack and so on.
Note:
①Safety airbag is disposable and must be replaced after detonation.
②The fault of airbag can only be checked by diagnostic unit.
③Wait at least 1 minute after disconnecting the negative pole of battery and then you can dismantle any airbag.Dismantle and store the airbag and clock spring before repairing the steering system.
④Even if the power is cut off,the capacity inside the airbag controller can provide the storage power for SRS.
⑤Refitting,dismantling,knocking or opening the component of safety system or dismantling or damaging the wire connection are prohibited,or it may cause the safety airbag to work suddenly or lose its function.
⑥After installation,make sure that all the connectors are connected properly by checking carefully and if the problems such as short circuit,virtual connection,or wire tapping appear,they may cause the sudden detonation of SRS circuit.
2)Airbag Controller
Function:Monitor the components of SRS continuously;record the monitored fault;illuminate the fault warning light;communicate with the diagnostic tool;
Installation Position:Airbag controller is installed between hand brake and gear shift on the central passage floor below the central control box.The airbag controller has front impact sensor,which can sense the front impact signal.The airbag controller can monitor the whole SRS,as shown in Fig.3.50.
Fig.3.50 Safety Airbag Controller(https://www.daowen.com)
Note:
①If safety airbag warning light illuminates,you must check the SRS;
②Safety airbag controller must be handled gently and avoid bumping when assembling.The controller shell can’t be taken part without permission.
③There is an arrow pointing forward on the airbag controller and installation must be done in accordance with the right installation direction.
3)Clock Spring
Clock spring,a kind of electrical equipment rotating connector,is installed on the combination switch base and besides being connected with the main airbag,it transfers the electrical signal from the horn on the steering wheel and entertainment device and rotates with the steering wheel,as shown in Fig.3.51.
Fig.3.51 Clock Spring
Note:
①Rotating the steering wheel more than 3.25 circles may damage the clock spring.
②Taking apart the clock spring may cause accidental damage,and if the airbag detonates,the clock spring must be changed.
The dismantling/replacement of clock spring:
When dismantling and replacing the clock spring,be sure to check whether the positions of coil and steering wheel are central or not.
③To ensure the central position,rotate the coil slowly until there is resistance and then reverse 3.25 circles to be aligned with the central mark.
4)Safety Airbag Indicator Light(Fig.3.52)
Fig.3.52 Safety Airbag Indicator Light
Safety airbag indicator light is red.
When the power of the whole vehicle is on,safety airbag indicator light goes out after illuminating 3-6 s.Under normal working condition,safety airbag indicator light is off.