System Description

The Frontal SIR system consists of the following components:
^ Inflatable Restraint Sensing and Diagnostic Module (SDM)
^ Inflatable Restraint Steering Wheel Module Inflatable Restraint Steering Wheel Module Coil
^ Inflatable Restraint Instrument Panel (IP) Module
^ Inflatable Restraint Driver Seat Module
^ Inflatable Restraint Passenger Seat Module
^ Driver Seat Belt Pretensioner
^ Passenger Seat Belt Pretensioner
^ Inflatable Restraint Side Impact Sensors
^ AIR BAG Warning Lamp in the Instrument Panel Cluster

The Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Steering Wheel Module Coil, Inflatable Restraint Steering Wheel Module, Inflatable Restraint IP module, Driver Seat Belt Pretensioner, Front Passenger Seat Belt Pretensioner, and the connecting wires make up the frontal deployment loops. The function of the frontal deployment loops is to supply current through the Frontal Inflator Modules And The Pretensioners, Deploying The Frontal Inflator Modules and the pretensioners in the event of a mild-to-severe frontal collision. Deployment occurs when the SDM detects vehicle velocity changes severe enough to warrant deployment.

The SDM contains a sensing device (accelerometer) that converts vehicle velocity changes to an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generates signals to values stored in memory. When two of the generated signals exceed the stored values, the SDM will cause current to flow through the frontal inflator modules and the pretensioners, deploying the frontal inflator modules and the pretensioners.

Side Impact Restraint Devices
The side impact air bag system supplements the protection offered by the driver door, the front passenger door, and the vehicle structure. The side impact air bag system deploys an air bag from the side of the driver or front passenger seat. A side crash of sufficient force will deploy a side air bag.

Side Impact Air Bag System Description
The side impact air bag system consists of the following components:
^ Two Inflatable Restraint Side Impact Sensors (SIS) (One in each B-pillar)
^ An Inflatable Restraint Front Side Impact Module (LH) in the driver's seat
^ An Inflatable Restraint Front Side Impact Module in the front passenger's seat
^ An AIR BAG Warning Lamp in the Instrument Panel Cluster
^ An Inflatable Restraint Sensing and Diagnostic Module (SDM)

The Inflatable Restraint Side Impact Sensor (SIS), the Inflatable Restraint Front Side Impact Modules, and the connecting wires make up the side impact deployment loops. The function of the side impact deployment loop is to supply current through the side impact inflator module, which will cause deployment of the side impact air bag. Deployment occurs when one of the SISs detects a side impact severe enough to warrant deployment.
The SIS contains a sensing device (accelerometer) that converts acceleration into an electrical (analog) signal. This signal is converted by a microprocessor in the SIS into acceleration and velocity data. This data is used by a sensing algorithm and compared to various predetermined boundary conditions. When the acceleration value exceeds the predetermined threshold, and the velocity boundary is crossed, the SIS will cause current to flow through the Inflatable Restraint front side impact module (LH) or the Inflatable Restraint front side impact module (RH).