Savana 3500 V8-6.6L DSL Turbo VIN 2 (2006)
Air Bag: Description and Operation
Dual Stage Inflator Modules
DUAL STAGE INFLATOR MODULES (LIGHT DUTY)
Dual stage inflator modules contain a housing, inflatable air bag, two initiating devices, canister of gas generating material and, in some cases, stored
compressed gas. The two initiators are part of the inflator module deployment loop. The inflator modules have two stages of deployment, which varies
the amount of restraint to the occupant according to the collision severity. For moderate frontal collisions the inflator modules deploy at less than full
deployment which consists of stage 1 of the inflator module. For more severe frontal collisions a full deployment is initiated which consists of stage 1
and stage 2 of the inflator module. When the vehicle is involved in a collision of sufficient force, the SDM will cause current to flow through the
deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas and the
release of compressed gas, if present. The gas produced from this reaction rapidly inflates the air bag. Once the air bag is inflated it quickly deflates
through the air bag vent holes.
Each dual stage inflator module is equipped with a shorting bar located on the connector(s) of the module. The shorting bar shorts the inflator module
deployment loop circuitry to prevent unwanted deployment of the air bag when it is disconnected.
