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Home >> Porsche >> 1983 >> 944 Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> DME Digital Engine Control >> Operation >> Data Sensors >> Reference Mark Sensor

Reference Mark Sensor

The reference mark sensor is located on crankcase flange. This sensor detects crankshaft position in relation to top dead center, and sends this signal to the control unit. It is triggered by a bolt cemented into the flywheel.