Circuit Description
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
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.