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Home >> Geo >> 1993 >> Metro Base, 2D Hatchback, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Crank Signal
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Crank Signal

Engine start signal, sent from starter circuit, is used by ECM to determine when engine is cranking. Using this signal, ECM calculates fuel injection timing, Idle Air Control (IAC) valve.

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