Grand Prix V6-3.8L VIN 2 (2004)
Impact Sensor: Description and Operation
Inflatable Restraint Front End Sensor
INFLATABLE RESTRAINT FRONT END SENSOR
The front end sensor also known as the electronic frontal sensor (EFS) is 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 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.
