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Home >> Audi >> 1989 >> 80 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Theory/Operation >> Computerized Engine Controls >> Input Devices >> Engine RPM Speed Sensor (CIS Digital Control)
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Engine RPM Speed Sensor (CIS Digital Control)

An engine RPM speed sensor, located in upper part of bell housing, detects movement of ring gear teeth on flywheel. This signal is used to determine engine RPM and ignition timing.