Belt buckle sensor
Belt buckle sensor |
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.
The control module supplies a current to the Hall sensor every 400 ms and checks how much current is passing through the sensor. The current passing through the sensor is dependent on the magnetic flow affecting it.
Position | Min value | Max value |
Unlocked
|
2.0 mA
|
5.0 mA
|
Locked
|
12.0 mA
|
15.0 mA
|
The belt buckle sensors can be diagnosed using Tech2.