Circuit Opening Relay (Tundra 4.7L V8)

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Circuit opening relay controls fuel pump circuit by supplying voltage to fuel pump relay. When EFI main relay is energized, it provides battery voltage to one side of circuit opening relay. When ignition is turned on, voltage is supplied through IGN fuse to other side 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 pump relay which supplies voltage for fuel pump operation. For circuit opening relay location, see CIRCUIT OPENING RELAY LOCATION table. For operation of fuel pump relay, see FUEL PUMP RELAY & FUEL PUMP RESISTOR (SEQUOIA & TUNDRA 4.7L V8) under FUEL PUMP CONTROL CIRCUIT.