Airbag - Electric Circuit
| Ignitor for airbag driver's side |
| Ignitor for airbag passenger's side |
| Ignitor for knees airbag driver's side |
| Ignitor for side airbag driver's side |
| Ignitor for side airbag passenger's side |
| Ignitor for headairbag driver's side |
| Ignitor for headairbag passenger's side |
| Ignitor for belt tensioner driver's side |
| Ignitor for belt tensioner passenger's side |
| Ignitor for belt tensioner rear driver's side |
| Ignitor for belt tensioner rear passenger's side |
| Ignitor for side airbag rear driver's side |
| Ignitor for side airbag rear passenger's side |
There are two wires from the one and only control unit to each of the igniters. Only those for the side airbags have an additional ground line. And those are designed twice for the head airbags. The knees airbag for the
driver's side has four electrical connections.
The airbag for the driver's side is of course part of the steering wheel and is controlled by a coil spring. It is also directly connected to the airbag control unit, but by passage through the control unit for the steering
column electronics.
In the case of this VW Golf, the control unit is installed behind the center console and receives its extra plus via fuse directly from the wiring harness for ignition plus. The switches of all safety belts
are also connected to the controller.
The passenger's side is especially treated. It has a sensor for people sitting there. And if you put a child seat against the direction of travel there, you have the possibility to disable the front passenger airbag by a switch
in the glove box. This in turn is indicated by a warning light in the display.
| Crash sensor for side airbag driver's side |
| Crash sensor for side airbag passenger's side |
| Crash sensor for side airbag rear driver's side |
| Crash sensor for side airbag rear passenger's side |
Four crash sensors for special cases are arranged outside in particularly suitable places. The remaining sensors for detection of a crash are obviously installed in the control unit itself. That's why
her a little bit unusual position in the vehicle.
There is only one connection to the CAN bus drive left. It is not clear which data are queried about it, recognizable in any case no crash data. May be a forgotten buckling
is reported via the diagnostic interface to the dash panel controller, causing the corresponding display and the unpleasant sounds.
A driver always has to be seated and the passengers seat is controlled, too. But why is the use of belts tested on the rear seats, although there is no control of sitting people there? Presumably, the side airbags are
rear only triggered, if at least one seat belt is used. Not belted people on the rear seats are punished double. 12/18
| 
