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Home >> Geo >> 1996 >> Prizm Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation 1.6 & 1.8L >> Computerized Engine Controls >> Input Devices >> Ignition Signal

Ignition Signal

PCM provides 5 volts to ignitor. After processing this voltage, ignitor returns it back to PCM as an ignition fail-safe signal. PCM also receives a 0.7 volt ignition signal during starter operation. PCM uses both of these signals along with others, to determine when to energize fuel injectors.