Malibu L4-2.2L VIN F (2005)
Impact Sensor: Description and Operation
Front End Sensors
INFLATABLE RESTRAINT FRONT END SENSORS
The front end sensor, also known as the electronic frontal sensor (EFS), is equipped on vehicles to supplement the Supplemental Inflatable Restraint
(SIR) System performance. The front end sensor is an electronic sensor and is not part of the deployment loops, but instead provides an input to the
sensing and diagnostic module (SDM). The front end sensor 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.
