Door lock device (page 2 of 2)

An AIR BAG is a passive safety device consisting of a bag which automatically inflates in the case of frontal impact in order to form a barrier between the driver's body and car structures. This device will not work to maximum efficiency unless the driver is also secured by seat belts with pre-tensioners.

Deceleration sensors located inside the electronic control unit are specially adjusted to detect crash conditions. The electronic control unit triggers a reaction with a chemical compound (sodium azide), which produces a gas consisting mainly of nitrogen. This gas instantly inflates synthetic fabric bags housed in the middle of the steering wheel and above the glove compartment in front of the passenger.

An air bag system consists of the following parts:

1. Electronic control unit:
   • - contains an electronic circuit with two deceleration sensors;
   • - assesses crash situation, implements intervention strategies, detects and stores faults.
2. Driver's side air bag module
3. Passenger side air bag module (options)
4. Red warning light on instrument panel indicating system faults and test codes
5. Socket for connecting Fiat Lancia Tester
6. Junction unit
7. Relay unit
8. Mechanical pretensioners
9. Air bag earth