Inflatable Restraint Electronic Frontal Sensor (EFS)

The electronic frontal sensors (EFS) are equipped on vehicles to supplement the SIR system performance. The EFS is an electronic sensor and is not part of the deployment loops, but instead provides an input to the SDM. The EFS can assist in determining the severity of some frontal collisions. The SDM uses the input from the discriminating sensor to assist in determining the severity of a frontal collision further supporting air bag deployment. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the frontal air bags.