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Home >> Geo >> 1990 >> Metro XFi >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Air Induction System - Computerized Engine Controls >> Input Devices >> Engine Start Signal

Engine Start Signal

Engine start signal, sent from starter circuit, is used by ECM to determine whether engine is cranking or not. Using this signal, ECM calculates fuel injection timing and idle speed control.