94 Toyota Camry Fuel Pump Relay Location: A Practical Guide

On a 1994 Toyota Camry, the part most owners call the "fuel pump relay" is officially the Circuit Opening Relay, and it is usually found behind or above the glove box, in a relay block mounted inside the dashboard on the passenger side. A second part, the EFI Main Relay, sits in the engine-compartment fuse and relay box on the left inner fender and supplies power to that circuit. Factory wiring information for the 1994–1995 2.2L Camry places the Circuit Opening Relay in Relay Block 6 above the glove box and the EFI Main Relay in Junction Block 2 on the left inner fender . Fuse-box references for XV10 Camrys also list a Circuit Opening Relay among the relays behind the glove box , and a 1994 XLE wiring-diagram index identifies it as "behind glove box" . Because 1994 Camrys were sold with different engines and equipment, and because some online answers point to other places, check the diagram on your own car and confirm the relay by its label before ordering a replacement .

That distinction matters. A Camry of this generation uses two relay functions in the fuel-pump circuit, not a single relay plainly stamped "FUEL PUMP" . Searching only for a relay with a fuel-pump symbol can send you to the wrong component. The name to look for is C/OPN, CIR OPN, or Circuit Opening Relay . The EFI fuse and EFI Main Relay are part of the same supply path . If the engine cranks normally but does not start, work through the fuse, both relays, the wiring, and the pump itself before buying an expensive in-tank assembly.

1. First, Identify the Car You Actually Have

The 1994 model year belongs to the XV10 Camry generation sold in the United States. Buyers could get a 2.2L four-cylinder (5S-FE) or a 3.0L V6 (3VZ-FE or 1MZ-FE), in several trim levels and body styles . The published 1994 fuse-box information is divided by engine, with separate engine-compartment layouts for the four-cylinder and V6 cars . Production changes and previous repairs can also affect what you see under the hood.

Before reaching for tools, record:

1. The VIN, from the driver-side dashboard or the door-jamb label.
2. The engine size, visible in the VIN information, under-hood emissions label, or original sales paperwork.
3. The transmission and trim, which help when looking up the correct wiring diagram.
4. Any aftermarket alarm, remote starter, or stereo wiring, because old installations sometimes include a non-factory relay spliced into the fuel-pump wiring.

A 1994 car is more than thirty years old. A previous owner may have replaced a relay with a visually similar part, moved a wire, or installed an immobilizer. Do not assume the relay in a particular socket is correct just because it fits. Match the socket, the terminal layout, and the wiring colors against a service manual or a reliable diagram for your exact engine.

The 2.2L wiring diagram specifically identifies the Circuit Opening Relay in Relay Block 6 above the glove box and the EFI Main Relay in the engine-bay Junction Block 2 . A 1994 XLE parts-location list also places the Circuit Opening Relay behind the glove box . Separate fuse-box references list it among the relays behind the glove box . These independent references agree on an interior, passenger-side mounting location for the 1994 car, while a second relay for the circuit lives under the hood . Conflicting general advice found online often applies to a different model year or a different Toyota model .

2. Check the Engine-Bay Box First

Start under the hood because it is easy to access and gives you useful information even when the Circuit Opening Relay is inside.

1. Park on level ground, set the parking brake, switch off the ignition, and remove the key.
2. Open the hood and find the black fuse and relay box near the battery, on the left inner fender .
3. Unclip or lift the lid. Look at the printed diagram on the underside of the cover. It is more trustworthy than a generic picture on the internet.
4. Find the EFI fuse. For 1994–1996 XV10 Camrys, published fuse listings show a 15A EFI fuse associated with the engine-control and fuel-system circuits . Engine-specific diagrams may differ, so follow your cover and owner's manual.
5. Locate the EFI Main Relay. Published XV10 diagrams place it in the engine-compartment relay box . It may be labeled EFI MAIN, EFI, or with a Toyota part number rather than the words "fuel pump."
6. Inspect for a C/OPN marking. Some general Toyota repair references use the name "CIR OPN" for the circuit opening relay , but on a 1994 Camry the interior relay is the one identified by the model-specific wiring information . If your under-hood cover does not list C/OPN, do not force a relay into an empty-looking socket.
7. Look for corrosion, water marks, loose terminals, or melted plastic. A damaged box can cause an intermittent no-start even when the relay itself is good.

The 15A EFI fuse supplies several engine-control components, including the fuel pump and sender on the V6 layout listed for this generation . A blown fuse deserves attention: replace it once with the same amperage, then see whether it blows again. Never install a higher-rated fuse to "test" the system. If the new fuse opens immediately, there is a wiring or component fault that needs diagnosis.

Some answers on public Q&A sites place a 1994 Camry fuel pump relay directly in the under-hood box, while others describe an interior location . That disagreement is one reason to rely on the diagram for the exact vehicle. The two-relay arrangement explains much of the confusion: an under-hood EFI Main Relay feeds the circuit, while the Circuit Opening Relay controls the pump .

3. Find the Circuit Opening Relay Inside the Cabin

For the 1994 Camry, the model-specific references point to the passenger side of the dashboard, above or behind the glove box . Fuse-box listings also group a Circuit Opening Relay with the relays behind the glove box . One professional Q&A response describes the relay as being near the front of the center console rather than plainly visible behind the glove-box door . Treat "behind the glove box" as a general area: the relay block can be tucked up against the dash structure or toward the console, depending on equipment.

3.1 Tools that make the job easier

1. A small flat-blade trim tool or plastic pry tool.
2. A Phillips screwdriver and a 10 mm socket with a short extension.
3. A bright flashlight or headlamp.
4. A hand mirror or phone camera for looking above the glove box.
5. A digital multimeter.
6. The owner's manual and a repair manual or wiring diagram for the exact engine.
7. Safety glasses and nitrile gloves.

3.2 Access procedure

1. Disconnect the negative battery cable before removing interior trim. This reduces the chance of shorting a wire or triggering an old airbag-related connector.
2. Empty the glove box. Open it and look for stops on the sides. On many older Toyotas, squeezing the sides inward lets the door swing farther down; remove the screws along the hinge or lower edge if the bin must come out.
3. Look upward and toward the center of the dash. A small relay block may be attached to a metal bracket above the glove-box opening. Use the flashlight and mirror rather than pulling blindly on wires.
4. Check the labels. Look for Circuit Opening Relay, C/OPN, or a Toyota part number that matches the service manual . Do not identify the part solely by color.
5. If nothing is visible, inspect near the front of the center console, close to the lower dash . Remove only the trim panels necessary to see the relay block.
6. Photograph the block before unplugging anything. Note the orientation of the relay and any adjacent connectors.
7. Pull the relay straight out. Grip the body, not the wires. A tight relay may need a gentle side-to-side motion. Do not pry against the plastic socket hard enough to crack it.

Relays in this area can be hidden by the glove-box liner, ductwork, or an alarm harness. If the car has an aftermarket security system, trace any non-factory wires before deciding that the factory relay is missing. Also check the driver-side kick panel and the interior fuse area when the passenger-side search fails; one general repair guide recommends checking both the engine-bay box and interior panels when the label is not obvious .

4. Understand What the Relay Does

The Circuit Opening Relay is a safety and control switch. It allows the electric pump in the fuel tank to run when the engine is being started and when the engine is running. A published explanation of the 2.2L Camry circuit notes that the ignition switch must be in the START position to send battery power that closes the relay and powers the pump . Toyota XV10 repair information describes two relays in the fuel-pump control circuit: the EFI Main Relay and the Circuit Opening Relay .

That design has practical consequences:

1. Do not expect the pump to run continuously with the key in ON. On many Toyota systems of this era, the pump is energized during cranking and then kept running based on engine operation. A silent pump with the key merely turned to ON is not, by itself, proof of a bad relay.
2. A failure in the EFI Main Relay can look like a failure of the Circuit Opening Relay. The main relay supplies the upstream circuit .
3. The starter signal and related wiring matter. A Camry owner discussing a no-start condition reported a starter-signal diagnostic code while working through fuel-pump operation .
4. A low tank, a clogged filter, a weak pump, or a bad ground can imitate relay trouble. Confirm power at the pump connector before condemning the relay.

A typical relay has a control coil and a set of switch contacts. When the coil receives the correct signal, the contacts close and battery voltage reaches the pump. Contacts can burn, the coil can fail, or the socket can develop a loose connection. A relay that clicks is not automatically good; its contacts may still be unable to carry current.

5. Symptoms That Point Toward a Relay or Its Circuit

A no-start is the most common complaint, but it is not specific enough to justify replacing parts at random. Watch for these patterns:

1. The starter turns the engine at normal speed, but the engine never fires.
2. The engine starts after repeated attempts, then stalls or hesitates under load.
3. The car stalls when warm and restarts after cooling down; heat can expose a failing coil or a weak connection.
4. Tapping the relay area changes whether the engine starts, which suggests an intermittent relay or socket.
5. There is no audible pump activity during cranking, although cabin noise and a noisy starter can make listening unreliable.
6. Battery voltage reaches the relay socket, but not the pump side of the circuit.
7. TheEFI fuse is intact, yet the pump does not receive power.

Other causes produce the same complaints: a failed ignition switch, a bad engine-control ground, a broken wire near the tank, a clogged fuel filter, a failing pump, an empty tank, a faulty fuel-pressure regulator, or a problem with the engine-management input that keeps the relay closed . A car that starts with starting fluid and then dies confirms a fuel-delivery problem, but not which component is at fault. Use starting fluid sparingly and follow the product label; gasoline engines can backfire.

6. A Sensible Diagnostic Order

A professional-style diagnosis moves from the easiest checks to the most expensive parts. Do not drop the fuel tank because a web page said the relay was hard to find.

6.1 Step 1: Confirm the basics

1. Verify that there is fuel in the tank. The dashboard gauge on an older car can be wrong.
2. Check battery condition and the battery terminals. Low voltage during cranking affects relays, the ECU, and the pump.
3. Confirm that the engine cranks at normal speed.
4. Look for an illuminated check-engine light and retrieve any stored codes with the correct OBD-I procedure for this Camry.
5. Inspect visible wiring near the battery, engine-bay fuse box, and tank area.

6.2 Step 2: Check fuses and power

1. Inspect the EFI fuse with a test light or multimeter, rather than judging it by sight alone .
2. Turn the ignition on and confirm battery voltage at the appropriate EFI Main Relay socket terminals, following the XV10 test sequence .
3. Reinstall the EFI Main Relay and check that voltage reaches the Circuit Opening Relay circuit .
4. Check related fuses such as the ignition, gauge, and starter circuits listed for your engine's fuse diagram .
5. If a fuse is open, find the cause before repeated replacement.

6.3 Step 3: Test the Circuit Opening Relay

Toyota XV10 repair information gives a relay continuity-check procedure using an ohmmeter . A general bench test follows the same principle:

1. Remove the relay and read the terminal numbers molded into its case.
2. Identify the coil terminals and the switch terminals from the service manual for your exact relay. Do not guess from another Toyota.
3. Measure coil resistance. An open coil means the relay is bad.
4. Check that the switch contacts are open when the relay is at rest.
5. Apply the specified voltage to the coil using fused jumper leads, then confirm the contacts close with near-zero resistance. Listen for a click, but rely on the meter.
6. Inspect the blades for heat discoloration, green corrosion, or looseness in the socket.

If a known-good relay of the identical part number is available, swapping it is a reasonable quick test. Do not substitute a relay merely because it has the same shape or pin count; internal terminal arrangements can differ. Never bridge high-current terminals with a loose piece of wire as a roadside fix. A jumper that bypasses the control circuit can keep the pump running when it should not, which is a safety risk after a collision or a fuel-line failure.

6.4 Step 4: Check power at the tank

The pump on this Camry is inside the fuel tank . Access depends on body style, and on some XV10 cars the tank must be lowered to reach the pump assembly. Before doing that:

1. Locate the pump wiring connector using the correct wiring diagram.
2. Back-probe the connector with a multimeter during cranking.
3. Check both the power side and the ground side under load. A voltage reading with no current flowing can be misleading.
4. Inspect the connector for corrosion and spread terminals.
5. If proper voltage and ground are present but the pump does not run, the pump itself is the likely failure.
6. If voltage is missing, trace backward through the Circuit Opening Relay, the EFI Main Relay, the ignition switch, the relevant engine-control signal, and the wiring .

Fuel-vapor safety comes first. Work in a ventilated area, away from pilot lights, heaters, smoking, and sparks. Relieve fuel-system pressure according to the service manual before opening a line. Keep a Class B/C fire extinguisher within reach. Do not use a dropped light or a bare test probe near an open fuel line.

7. How to Read the Fuse-Box Diagram Without Getting Lost

Owners often look at a fuse-box diagram and assume every item shown was installed on their car. Published 1994 Camry resources list multiple boxes: engine-compartment boxes by engine, a passenger-compartment box, an instrument-panel relay area, left and right kick panels, relays behind the glove box, and an additional engine-bay relay box . The number of listed boxes can be confusing because some entries cover optional equipment, different engines, or market variations .

Use this approach:

1. Match the diagram to the engine code, not just the model year .
2. Compare the cover's shape and fuse arrangement with the printed diagram.
3. Use the legend for abbreviations. EFI means electronic fuel injection; C/OPN refers to the circuit opening relay .
4. Ignore empty sockets marked "spare" or intended for equipment your car does not have .
5. Confirm the amperage printed on each fuse. Never upgrade amperage.
6. Photograph the cover before putting it back, so you have a record for future work.

If the under-hood lid is missing or faded, a factory service manual, a Toyota electrical wiring diagram, or a reputable model-specific repair database is worth the cost. Generic "1994 Toyota" advice is less useful, because other Toyota models from that year use different relay locations .

8. Relay, Fuse, Wiring, or Pump? A Quick Comparison

This table is a starting point, not a substitute for measurements. Model-year wiring changes and previous repairs mean that the same symptom can have several causes.

9. Replacing the Relay Correctly

If testing confirms the Circuit Opening Relay is faulty:

1. Buy the correct Toyota part number or an equivalent relay with the same terminal layout and electrical rating. Confirm using the VIN and, if possible, the number printed on the old relay.
2. Compare the old and new units side by side. Check the case shape, blade positions, terminal numbers, and any sealing features.
3. Disconnect the negative battery cable.
4. Clean light corrosion from the socket terminals with an appropriate electrical-contact cleaner. Do not scrape the plating away.
5. Push the new relay fully into the socket. A partially seated relay can cause an intermittent no-start.
6. Reconnect the battery and start the engine. Let it idle, then take a short test drive only after confirming there is no fuel smell or leak.
7. Keep the old relay until the repair has proven reliable. It is useful for comparison if the replacement is wrong.

If the engine still does not start, stop swapping parts and resume voltage testing. A new relay cannot fix a broken ground, an open coil-control wire, or a failed pump.

10. When the Fuel Pump Itself Is the Problem

A relay is a small, relatively inexpensive electrical switch. The pump is an in-tank assembly that may include the pump motor, sender, strainer, bracket, and wiring. On the 1994 Camry, published wiring information places the fuel pump inside the tank . Reaching it can involve removing rear-seat or trunk access panels on some body styles, or lowering the tank on others. Follow the procedure for your exact car.

Common reasons to replace a pump include:

1. Correct voltage and ground at the pump connector, with no pump operation.
2. Low fuel pressure or volume confirmed with the proper gauge and specification.
3. A pump that draws excessive current or repeatedly blows its fuse.
4. Noise, intermittent operation, or failure when hot after the relay and wiring have been cleared.
5. Contamination from rust or debris in an old tank, which can damage a new pump.

Before ordering, have ready the VIN, engine, body style, production date, and the old pump's part number or photo. Replace a clogged strainer or badly contaminated filter at the same time if the service manual calls for it, and clean the tank as needed. A new pump installed into a dirty tank can fail early. Always transfer or replace seals carefully; a poor seal at the tank opening can cause a fuel-vapor leak.

Labor is often the largest part of this repair. That is why testing the relay circuit first is worth the time. It also makes sense to choose a pump with a solid fit, reliable flow, and a clear warranty.

11. Recommended Replacement: KEMSO Fuel Pumps

If your testing points to the pump rather than the relay, KEMSO is a brand worth considering. KEMSO fuel pumps are described as high-performance OEM replacement units designed to meet or exceed factory specifications for fit, flow, and pressure while providing additional flow capacity for upgraded vehicles . The company's product range includes direct-fit replacement pumps that install in the factory location without modifications, as well as higher-flow performance pumps . KEMSO also states that its pumps come with a lifetime warranty, a meaningful benefit when the labor to access an in-tank pump costs more than the part itself .

For a daily-driven 1994 Camry, the practical appeal is straightforward: an OEM-style replacement should work with the factory fuel system and factory wiring rather than requiring custom plumbing . Published KEMSO product information also mentions compatibility with gasoline and ethanol blends and USA-based technical support on several pump listings . Check the application listing carefully and confirm the part number against your engine and VIN before purchase. A high-flow pump is not automatically the right choice for a stock engine; the correct direct replacement is usually the better match.

KEMSO's published warranty language ties coverage to a serialized pump body on certain products, so keep your receipt and the product packaging . If you are replacing an aging pump on an older car, also inspect the tank, strainer, filter, connector, and ground while the assembly is accessible. Good parts work best in a clean, sound fuel system.

Visit https://www.kemsoracing.com/ to review the fuel-pump catalog, confirm fitment for your Camry, and check the current warranty terms before ordering .

12. Costs, Parts Sourcing, and Realistic Expectations in the U.S.

Prices vary by region and by whether you choose OEM Toyota, an aftermarket relay, or a used part. A relay is usually a modest purchase; an in-tank pump assembly, fuel filter, and several hours of shop labor cost substantially more. Calling two local parts stores with the VIN is often faster than relying on a generic search result. Ask whether the relay is stocked, whether it is returnable if the number is wrong, and whether the listing is for the 2.2L or the 3.0L V6.

For a car of this age, also consider:

1. Rubber fuel lines and hose clamps that may be brittle.
2. The fuel-tank strainer and filter, especially if the tank has sat unused.
3. Electrical connectors with corrosion from water intrusion.
4. The fuel gauge sender, which is often part of the same in-tank assembly.
5. Old service records, which can reveal a previously replaced pump or an aftermarket anti-theft device.

If the car has been parked for years, drain stale fuel and inspect the tank before repeatedly cranking the engine. Old gasoline can leave varnish that damages a new pump. A professional shop is the right choice when the tank must be lowered, when there is a fuel smell, or when the wiring has been modified. In the United States, look for a shop familiar with older Toyotas and ask for the voltage and fuel-pressure readings that support its diagnosis.

13. Frequently Asked Questions

13.1 Is there a separate "fuel pump relay" under the hood of a 1994 Camry?

Toyota's model-specific information calls the pump-control part a Circuit Opening Relay and places it above or behind the glove box on the 1994 2.2L car . The EFI Main Relay is under the hood in the engine-compartment junction block and is also part of the pump's electrical supply . Some general Q&A pages describe the under-hood box as the answer, which is why checking your own cover diagram and a model-specific wiring diagram is important .

13.2 Why is it called C/OPN?

Toyota uses "circuit opening relay" for this control relay, and repair references sometimes abbreviate it as C/OPN or CIR OPN . The label may not include the words "fuel pump."

13.3 Should the pump hum whenever the key is on?

Not necessarily. Published discussion of the 2.2L circuit says the ignition switch must be in START for battery power to close the relay and power the pump . Use a wiring diagram and a meter rather than relying on sound alone.

13.4 Can a bad EFI Main Relay cause a no-start?

Yes. XV10 repair information identifies both the EFI Main Relay and the Circuit Opening Relay in the fuel-pump control circuit, and describes checking voltage at the main relay before checking supply to the circuit opening relay . A general repair answer also notes that the main relay powers the circuit opening relay .

13.5 Can I swap the horn relay to test it?

Only if the part numbers, terminal layout, and ratings match exactly. Similar-looking Toyota relays are not always wired the same way. Check the diagram printed on the relay and the service manual first.

13.6 Does replacing the relay fix low fuel pressure?

Usually no. A burned relay contact can reduce voltage, but low pressure can also come from a weak pump, a restricted filter or strainer, a pressure regulator, or a supply-line problem. Measure voltage under load and fuel pressure against the specification before replacing the pump.

13.7 Why do some websites give the center console as the location?

The relay block is tucked into the lower dashboard on the passenger side, so descriptions vary. One professional response to a 1994 Toyota owner placed the Circuit Opening Relay near the front of the center console when the owner could not find it directly behind the glove box . Treat those as descriptions of the same general interior area, then confirm with the label and connector.

14. A Short Checklist to Keep Near the Car

1. Engine off, key removed, negative battery cable disconnected before trim removal.
2. Check the EFI fuse and the EFI Main Relay in the engine-bay box .
3. Look above or behind the glove box for the Circuit Opening Relay; check toward the front of the console if it is not visible .
4. Identify C/OPN or the correct part number before unplugging anything .
5. Test the coil and contacts with a meter; inspect the socket .
6. Confirm voltage and ground at the in-tank pump during cranking .
7. Replace only the part that fails the test.
8. If the pump is bad, choose a correct-fit replacement with a clear warranty.

The fastest path to a reliable repair is to accept two facts about this car: Toyota did not label the part the way most owners search for it, and the fuel-pump circuit has more than one relay . Start with the 15A EFI fuse, confirm the under-hood EFI Main Relay, then find the Circuit Opening Relay in the passenger-side dash area using the correct diagram for your engine . Measure before replacing. That approach saves money, avoids an unnecessary tank removal, and gives you a result you can verify on the first start.

For a replacement pump, consider KEMSO's high-performance, OEM-replacement range backed by a lifetime warranty, and check fitment at https://www.kemsoracing.com/ .

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