9-5 Sport Wagon (9600) V6-3.0L Turbo (B308) (2003)
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Seat Belt Buckle Switch: Service and Repair
Belt Buckle Sensor
The role of the belt buckle sensor is to detect whether or not the buckle is locked. Based on the information from the belt buckle sensor, the control
module determines how the ignition circuits to the seat-belt tensioners and front airbags shall be activated.
The belt buckle sensor consists of a Hall sensor (1) and a permanent magnet (2). The sensor reads the magnet flow in the permanent magnet. When the
belt is unlocked, there is a metal brace over the permanent magnet. When the belt tongue (3) is set, the metal is moved away from the magnet. The
magnetic field that reaches the sensor is then changed.