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M57/M67 – Camshaft-synchronous event control

The speed of the camshaft is registered by the camshaft speed sensor. This phase sensor supplies a digital signal (square-wave signal).

The DDE control unit can use this signal to synchronise the crankshaft and camshafts.

The result of a defective rpm sensor is that the engine can no longer be started (see crankshaft/camshaft synchronisation).