Fuel Pump Relay
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition switch is turned to RUN position, PCM will turn on electric fuel pump by energizing the fuel pump relay, located in the underhood junction block. PCM will keep relay energized if engine is running or cranking (PCM is receiving reference pulses from the ignition control module). If no reference pulses exist, PCM turns pump off within 2 seconds after key on.