Inflator Modules

The inflator modules consist of an supplemental bag and an inflator. An inflator consists of a canister of gas-generating material and an initiating device. The initiator is part of the deployment loop. When the vehicle is in a frontal crash of sufficient force, the supplemental restraint Sensing and Diagnostic Module (SDM) causes current to flow through the deployment loops. Current passing through the initiator ignites the material in the inflator module. The gas produced from this reaction rapidly inflates the air bag.

There is a shorting bar on the supplemental restraint steering wheel module side of the upper steering column connector that connects the supplemental restraint steering wheel module coil to the supplemental restraint steering wheel module. The shorting bar shorts across the supplemental restraint steering wheel module circuits during the disconnection of the upper steering column connector. The shorting of the supplemental restraint steering wheel module circuitry will help prevent unwanted deployment of the air bag when servicing the supplemental restraint steering wheel module, the steering column or other SRS components.

There is a shorting bar on the supplemental restraint IP module connector that connects to the SRS wiring harness. The shorting bar shorts across the supplemental restraint IP module circuits during the disconnection of the supplemental restraint IP module connector. The shorting of the supplemental restraint IP module circuitry will help prevent unwanted deployment of the air bag when servicing the supplemental restraint IP module, the instrument panel or other SRS components.

In the event of a fault in the supplemental restraint IP module switch circuitry, the SDM will detect the fault and set Diagnostic Trouble Code (DTC) B1054, the SDM will attempt to illuminate the AIR-BAG OFF lamp, the AIR BAG warning lamp will turn ON and the supplemental restraint IP module will default to the suppressed (disabled) state.