Cobalt L4-2.4L VIN B (2006)
Impact Sensor: Description and Operation
Front End Sensor
INFLATABLE RESTRAINT FRONT END SENSOR
The front end sensor is equipped on vehicles to supplement the 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.