Crankshaft position sensor function - GF07.04-P-4116-01AM
Crankshaft position and engine speed are detected contactlessly. The clearance between crankshaft position sensor (L5) and the teeth (d) of the drive plate (incremental gear) is fixed by the installation position (approx. 0.8 mm).
When the crankshaft is rotating, an alternating voltage is generated (induced) in the crankshaft position sensor by the teeth of the driven plate.
The front edge of a tooth (a) generates a positive voltage pulse and the rear edge (b) a negative voltage pulse. The gap between the positive and negative voltage peaks represents the length of one tooth.
The gap (c) produced by 2 missing teeth results in no voltage being generated in the crankshaft position sensor. This point is used for detecting the TDC position of cylinders 1 and 6.