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Home >> Geo >> 1997 >> Metro Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation 1.0 & 1.3L >> Computerized Engine Controls >> Powertrain Control Module (Pcm)
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Powertrain Control Module (Pcm)

Power for PCM is supplied from 15-amp FI fuse through main relay. PCM memory power is supplied from 15-amp TAIL fuse. FI, IG-COIL and DOME fuses are located in relay/fuse box. PCM distributes power and controls ground of various sensors, switches and solenoids for engine control. See Figure.

NOTE: Components are grouped into 2 categories. First category is INPUT DEVICES, which are components that control or produce voltage signals monitored by PCM. Second category is OUTPUT SIGNALS , which are components controlled by PCM.
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