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Home >> Saab >> 2003 >> 9-3 Vector, Standard >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Electrical Component Locations >> Electrical Components (Late; 9440) >> Technical Description >> Ionization Detection Module (740) >> Main task

Main task

The CDM does an initial signal processing of the ionization signals from each ignition coil. The CDM transmits the following three signals to the ECM:

These signals are used for knock control, synchronization of ignition timing/fuel injection and for misfire detection.

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