Structure and inner electrical connection

The measuring procedure is based on Hall IC. The output signal uses a flank to show Low status and a gap to show High status. The intake camshaft sensor operates on the same principle as the crankshaft sensor. However, the camshaft sensor wheel differs fundamentally. A special mark pattern enables emergency operation in the event of failure of the crankshaft sensor. However, the resolution of the camshaft sensor signal is too imprecise to replace the crankshaft sensor during normal operation.

Fig 1: Hall Effect Sensor - Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.