Swift GA L4-1298cc 1.3L SOHC MFI (2001)
Safing Sensor: Description and Operation
FORWARD (DISCRIMINATING) SENSOR
The forward (discriminating) sensor is used by the SDM to determine whether or not certain frontal crashes require deployment of the air bags. The
sensor consists of a sensing element, normally open switch contacts and a diagnostic resistor. The sensing element closes the switch contacts when the
vehicle velocity changes are severe enough to warrant deployment. The diagnostic resistor is connected in parallel with the switch contacts inside the
sensor. The diagnostic resistor, in conjunction with resistors in the SDM, causes a voltage drop which allows the SDM to monitor the integrity of the
forward (discriminating) sensor and associated circuitry.