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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls & Fuel - 3.8L - Diagnosis & Troubleshooting) >> Fuel Pump Electrical Circuit Diagnosis >> Circuit Description

Circuit Description

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When you turn ON the ignition switch, the control module energizes the fuel pump relay which powers the fuel pump ON. The pump remains ON as long as the engine is cranking or running and the control module receives ignition reference pulses. If there are no reference pulses, the control module shuts the fuel pump OFF within 2 seconds after the ignition was switched to the ON position or if the engine stops.

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