9-5 Sport Wagon (9600) V6-3.0L Turbo (B308) (2003)
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Steering Angle Sensor: Description and Operation
Steering wheel angle sensor
The steering wheel angle sensor is located on the steering column between the steering wheel and the intermediate shaft. The sensor senses the angle
of the steering wheel and is connected to the P-bus. The sensor provides the ESP control module with information on steering wheel angle.
Function
The steering wheel angle sensor comprises a ring gear (1) mounted on the steering column shaft. Two gears with different numbers of teeth (2a has 28
teeth and 2b 26 teeth) engage this ring gear. Each gear has a permanent magnet (3a and 3b) and sensor, the resistance of which depends on the
magnetic field.
Since the two gears 2a and 2b have different numbers of teeth, the relative positions of the permanent magnets will be unique for each steering wheel
angle. Accordingly, the position of the steering wheel can be put out on the P-bus. This information is used by the ESP control module.
