Air Bag: Description and Operation

Construction and Function




The SRS airbag is provided as an auxiliary driver and passenger front seat restraint system to be used in combination with the seat belt. When an impact greater than a set level is applied to the front of the vehicle, the sensor senses it and generates an electrical pulse to inflate the bag in the airbag module, thus preventing the driver and passenger sit in front seat of upper bodies from impacting the steering wheel, instrument panel and windshield.




The SRS airbag consists of an airbag control module, left and right front sensors, safety sensor built into the control module, and airbag modules of driver and passenger containing an inflator and airbag. The left and right front sensors are connected in parallel respectively, and the front sensors and safety sensor are connected in series, so that the airbag will inflate if at least one front sensor and safety sensor sense an impact at the same time.




AIRBAG MODULE
The driver's airbag module is located at the center of the steering wheel, and passenger's airbag module is located at upper side of instrument panel, and if each contains an airbag and inflator. If a collision occurs, the inflator produces a large volume of nitrogen gas inflating the nylon airbag in a very short time.

AIRBAG CONNECTOR
The SRS airbag adopts a connector which has a double lock mechanism and coupling error detection mechanism for enhanced reliability. If coupling is incomplete, the airbag warning light comes on in the combination meter.




- Connector coupled to airbag control module
To disconnect the connector, press wire (1) of the airbag control module as illustrated until the green lever (2) tilts up. This unlocks the double lock, then you can pull off the connector while pressing tile connector lock.

To couple the connector, insert the three connectors until a "click" is heard, then push in the green lever (2) to apply the double lock.




- Connector between harnesses
To disconnect the connector, press lever (1) to pop green lever (2) out, this unlocks the double lock system. Then separate the connector by pulling both sides while holding the connector sections and pressing in lever (1).

To couple the connector, insert both connectors until a "click" is heard, then push in the green lever (2) until a "click" is heard, this applies the double lock.




AIRBAG WARNING LIGHT
The airbag warning light is located inside the combination meter. It illuminates if a poor connection occurs, or if the airbag control module detects an abnormality. When the airbag system is normal, this light goes out approximately eight seconds after turning the ignition switch ON.

AIRBAG MODULE




The driver's airbag module is located at the center of the steering wheel, and passenger's airbag module is located at upper side of instrument panel, and if each contains an airbag and inflator. If a collision occurs, the inflator produces a large volume of nitrogen gas inflating the nylon airbag in a very short time.