Crankshaft position sensor function - GF07.04-P-4116-01G
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
with segment control
Crankshaft position and engine speed are detected contactlessly. The distance between crankshaft position sensor (L5) and the segments of the driven plate/flywheel (12) is fixed by the installation position.
The front and rear edges of the segments generate an alternating voltage (induction) in the crankshaft position sensor (L5) when the engine is running. The higher the engine speed the higher the voltage. The permanent magnet in one segment causes a change in the signal which is used for detecting the respective ignition circuit.