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Home >> Saturn >> 2001 >> SL1 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Control System - Theory & Operation >> Computerized Engine Controls >> Powertrain Control Module >> Power Supply
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Power Supply

Power for PCM reference output signals (5 volts) and control devices (12 volts) is received from the battery (through ignition circuit when ignition switch is in ON position). Keep alive memory power is received directly from battery.

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