Bonneville V8-4.6L VIN Y (2004)
Impact Sensor: Description and Operation
INFLATABLE RESTRAINT FRONT END SENSOR
The inflatable restraint front end sensor also refer to as electronic frontal sensor (EFS), is equipped on some 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 contains a microprocessor which performs calculations using the measured accelerations
and compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to
flow through the frontal deployment loops deploying the frontal air bags.
INFLATABLE RESTRAINT SIDE IMPACT SENSOR (SIS)
The side impact sensor (SIS) contains a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are severe
enough to warrant air bag deployment. The SIS is not part of the deployment loop, but instead provides an input to the SDM. The SDM contains a
microprocessor that performs calculations using the measured accelerations and compares these calculations to a value stored in memory. When the
generated calculations exceed the stored value, the SDM will cause current to flow through the deployment loops deploying the side air bags.
