Colorado 2WD L4-2.8L VIN 8 (2004)
Impact Sensor: Description and Operation
Front End Sensor
INFLATABLE RESTRAINT FRONT END SENSOR
The inflatable restraint front end sensor is equipped on some vehicles to supplement the SIR system performance. The front end sensor (accelerometer)is
not part of the deployment loops, but instead provides an input to the SDM. The 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.