Circuit Opening Relay (4Runner)

Circuit opening relay controls the fuel pump circuit. When EFI main relay is energized, EFI main relay provides battery voltage to circuit opening relay. When proper input signals are delivered to the Engine Control Module (ECM), the circuit opening relay ground circuit is grounded at ECM terminal FC. Circuit opening relay then provides voltage to fuel pump for fuel pump operation. See CIRCUIT OPENING RELAY LOCATION table.

CIRCUIT OPENING RELAY LOCATION

Application

Location

Avalon

⁽¹⁾ Top Rear Corner Of Relay Box Behind Passenger's Side Kick Panel

Camry & Sienna

⁽¹⁾ In Relay Box At Driver's Side Front Corner Of Engine Compartment, Near Air Cleaner

Tacoma

Behind Lower Instrument Panel Cover, Next To Driver's Side Of Steering Column

T100

Behind Glove Box, Near Passenger's Side Kick Panel

4Runner

Below Right Corner Of Fuse/Relay Box Behind Lower Instrument Panel Cover At Driver's Side Of Instrument Panel To Left Of Steering Column, Just Above Hood Release Lever

⁽¹⁾	Circuit opening relay may be marked as CIR OPN relay in the relay box.

NOTE: EFI main relay may also be referred to as EFI relay.