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Home >> Saab >> 2005 >> 9-3 Linear, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> TRIONIC T8 Fuel Control System >> Technical description >> Ionization Detection Module (740) >> Main task
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Main task

The CDM does an initial signal processing of the ionization signals from each ignition coil. The CDM transmits 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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