Circuit Opening Relay (Camry CNG Models)

Circuit opening relay controls fuel supply circuit. When EFI main relay is energized, EFI main relay provides battery voltage to both sides of circuit opening relay. When proper input signals are delivered to Engine Control Module (ECM), circuit opening relay ground circuit is grounded at ECM terminal FC. Circuit opening relay then provides voltage to fuel tank fuel shutoff valve and fuel pressure regulator fuel shutoff valve. For circuit opening relay location, see CIRCUIT OPENING RELAY LOCATION  table.