SRX 2WD V8-4.6L VIN A (2004)
Impact Sensor: Description and Operation
INFLATABLE RESTRAINT FRONT END SENSOR
The front end sensors are 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 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.
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.
