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Home >> Chevrolet >> 1994 >> Astro Van Cargo Extended, 4.3 W, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Fuel Pump Feedback
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Fuel Pump Feedback

PCM monitors fuel pump circuit between fuel pump relay/oil pressure switch and fuel pump. This enables the PCM to determine if fuel pump is being energized by fuel pump relay or back-up oil pressure switch. A failure in this monitored circuit results in the setting of a related trouble code in PCM memory.

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