Circuit Opening Relay

Circuit opening relay is located in junction block No. 1 near driver-side kick panel. During cranking, a signal from ignition switch closes contacts in circuit opening relay to energize fuel pump and pressurize fuel system. Once engine is started, PCM controls circuit opening relay and fuel pump remains on. PCM provides a ground for circuit opening relay to control fuel pump operation. Fuel pump will operate as long as engine is cranking or running and PCM is receiving ignition reference pulses. If no ignition references are received, PCM will shut fuel pump off. For relay location, see Figure .