Circuit Opening Relay
WARNING: This page is about a different car, the 1995 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
Circuit opening relay controls fuel pump circuit. When EFI main relay is energized, EFI main relay provides battery voltage to circuit opening relay. When engine is cranking, circuit opening relay receives a start signal which energizes circuit opening relay. Circuit opening relay then provides voltage to fuel pump. When start signal is released from circuit opening relay, the circuit opening relay ground circuit is controlled at Engine Control Module (ECM) terminal FC.