Circuit Opening Relay

Circuit opening relay is located behind center console of instrument panel. Relay is mounted on bracket attached to the ECM/PCM.

During cranking, a signal from ignition switch closes the contacts in circuit opening relay to energize fuel pump and pressurize fuel system. Once engine is started, ECM/PCM controls circuit opening relay and fuel pump remains on. 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/PCM will shut off fuel pump.