Dakota 2WD V8-4.7L VIN J (2005)
The multistage passenger airbag is deployed by electrical signals generated by the Occupant Restraint Controller (ORC) through the passenger airbag
squib 1 and squib 2 circuits to the two initiators in the airbag inflator. By using two initiators, the airbag can be deployed at multiple levels of force. The
force level is controlled by the ORC to suit the monitored impact conditions by providing one of three delay intervals between the electrical signals
provided to the two initiators. The longer the delay between these signals, the less forcefully the airbag will deploy.
When the ORC sends the proper electrical signals to each initiator, the electrical energy generates enough heat to initiate a small pyrotechnic charge
which, in turn ignites chemical pellets within the inflator. Once ignited, these chemical pellets burn rapidly and produce a large quantity of inert gas. The
inflator is sealed to the airbag cushion and a diffuser in the inflator directs all of the inert gas into the airbag cushion, causing the cushion to inflate. As
the cushion inflates, the passenger airbag door will split at predetermined tear seam lines concealed on the inside surface of the door, then the door will
pivot up over the top of the instrument panel and out of the way. Following an airbag deployment, the airbag cushion quickly deflates by venting the inert
gas through vent holes within the fabric used to construct the back (windshield side) of the airbag cushion.
Typically, both initiators are used during an airbag deployment event. However, it is possible for only one initiator to be used during a deployment due to
an airbag system fault; therefore, it is necessary to always confirm that both initiators have been used in order to avoid the improper disposal of
potentially live pyrotechnic materials.
