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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 2.6L & 3.2L - Introduction >> Description and Operation >> Fuel System Description >> Fuel Pump Relay

Fuel Pump Relay

When the ignition switch is in the ON position before engaging the starter, the ECM energizes the fuel pump relay for 2 seconds, causing the fuel pump to pressurize the fuel system. If the ECM does not receive the ignition, reference pulses with the engine cranking or running within 2 seconds, the ECM shuts OFF the fuel pump relay, causing the fuel pump to stop.

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