Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
Impact Sensor: Description and Operation
FRONT SUB SENSOR
One front sub sensor is installed on each side, in front of the front wheel apron wall. The front sub sensor is a pendulum type sensor. If the sensor
receives a frontal impact exceeding a certain limit, the mass in the sensor rotates forward to turn the switch ON.
AIRBAG SENSOR
The safety sensor and electric sensor are incorporated into the airbag control module and the side airbag sensors.
The safety sensor is also a pendulum type sensor. If the sensor receives a frontal or side impact exceeding a certain limit, the mass in the sensor moves in
the direction opposite to the impact direction to turn the switch ON.
The electric sensor consists of a semiconductor type sensor which senses the deceleration caused by collision in terms of change in the electrical
resistance of the impact sensing circuit.
