Circuit Opening Relay (4Runner)

2004 Toyota Matrix XR, FWD, StandardSECTION Circuit Opening Relay (4Runner)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 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. 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 through fuel pump relay for fuel pump operation. For circuit opening relay location, see CIRCUIT OPENING RELAY LOCATIONΒ  table.

CIRCUIT OPENING RELAY LOCATION (1)

Application (2) Location
Avalon Top Corner Of Relay Box Behind Driver's Side Kick Panel
Camry & Camry Solara In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment
Highlander In Relay Box Just Above Driver's Side Kick Panel
Land Cruiser In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment
Sequoia & Sienna In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment
Tacoma Behind Lower Instrument Panel Cover, Next To Driver's Side Of Steering Column
Tundra In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment
4Runner In Fuse/Relay Box At Driver's Side Front Corner Of Engine Compartment
(1) Circuit opening relay may be marked as CIR OPN relay.
(2) Circuit opening relay may also be identified by appropriate illustration in SYSTEM & COMPONENT TESTING - V6 & V8 article.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.