Fuel Pump Relay

Fuel pump relay is located in fuse/relay block on left side of engine compartment, near the battery. When ignition is turned on, an input signal is sent from ECM main relay to the ECM.

The ECM uses this input signal to determine when to apply battery voltage to fuel pump relay. ECM supplies power to fuel pump relay. Fuel pump relay contacts close and power is supplied to fuel pump. Fuel pump will operate as long as engine is cranking or running and ECM is receiving ignition reference pulses. If no ignition references are received, ECM will shut off the fuel pump.