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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel Systems >> Fuel Pump Electrical Circuit Diagnosis >> Circuit Description

Circuit Description

When ignition is turned on, the control module enables the fuel pump relay to turn on. The fuel pump remains on as long as engine is cranking or running and control module receives ignition reference pulses. If there are no ignition reference pulses, the control module shuts the fuel pump off within 2 seconds after ignition was turned on or if engine stops.

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