Where is the fuel pump relay on a 1994 Toyota?
The fuel pump relay is usually located in the engine bay fuse/relay box, though some 1994 Toyotas place it in the interior fuse box behind the driver’s knee panel. The exact spot depends on the model and trim level.
In practice, you should start with the engine bay fuse/relay box and then check the interior fuse box if you don’t find a relay labeled FUEL PUMP. Use the lid diagram on each box to identify the correct relay, which is typically a small rectangular unit with 4 or 5 pins. If you still can’t locate it, consult the owner's manual or a service manual for your specific model, such as Camry, Corolla, 4Runner, or Pickup from that year.
Common locations to check
Most 1994 Toyotas rely on one of two fuse/relay boxes for the fuel pump relay. Inspect both to increase your chances of finding the correct unit.
Engine bay fuse/relay box
- Look for a rectangular relay block near the firewall or along the side of the engine bay, often labeled FUEL PUMP, FUEL, or PUMP on the lid diagram.
- The relay is usually grouped with other power relays and is a removable unit with 4–5 pins.
- If the lid diagram isn’t clear, trace the fuel pump circuit from the fuel filter or fuel rail to locate the relay position inside the box.
In many 1994 Toyota models (such as some Camry and Corolla configurations), the fuel pump relay is housed in this engine bay block. If you don’t see a clearly labeled fuel pump relay, compare the diagram on the lid to the relays in the box to identify the closest match.
Interior fuse box (driver’s side kick panel)
- Some trims route the fuel pump relay to the interior fuse/relay box behind the driver’s knee panel or under the dash.
- Open the panel and locate the relay labeled FUEL PUMP or a similar designation; relays here are generally the same size as other automotive relays.
- Check the box lid diagram for the exact position and pin configuration.
The interior location is less common on many 1994 Toyotas, but it appears on certain trims. If you don’t find the relay in the engine bay box, inspecting the interior box is worthwhile.
Testing and verification
Once you’ve located the relay, you can verify whether it’s functioning correctly using a few basic checks.
- With the ignition ON, listen for a brief fuel pump prime sound from the rear of the car (if equipped) or feel for vibration at the fuel rail. Absence of prime can indicate a bad relay or another fuel system issue.
- Swap the suspected fuel pump relay with a known-good relay of the same type (for example, the A/C relay or horn relay). If the vehicle starts or the pump runs after swapping, the original relay is likely faulty.
- Inspect the corresponding fuse for the fuel pump circuit and replace if blown. A blown fuse can mimic a failed relay.
- If you can access the fuel pump connector, measure voltage at the pump side when the ignition is ON. If there is 12V at the pump input only when the relay is active, the relay is likely switching power correctly but the pump or wiring may be at fault.
- If you’re still unsure, consult a service manual for your exact model or seek professional diagnostics to rule out wiring or ECU-related issues.
These steps help determine whether the relay itself, the associated fuse, or the wiring to the pump is at fault. Always exercise caution when working around the fuel system.
What to do if the vehicle won’t start
If the car won’t start after swapping or testing the relay, the issue could involve the fuel pump, wiring, ECU control, or a separate fuse. Recheck all related fuses, inspect the pump ground, and verify there’s power reaching the pump. If problems persist, a qualified mechanic or diagnostic service can provide a more precise test using specialized equipment.
Summary
For a 1994 Toyota, start by checking the engine bay fuse/relay box for a FUEL PUMP relay, then inspect the interior fuse box if needed. Use the lid diagrams to identify the correct relay, and test by swapping with a known-good relay or measuring voltage at the pump connector. If uncertain, consult your model’s service manual or a professional technician to avoid fuel-system hazards.
Where is the fuel pump relay on a 1989 Toyota?
The fuel pump relay on a 1989 Toyota 4x4 pick-up is typically located in the main fuse box under the hood. Symptoms of a faulty relay include engine stalling or no start due to interrupted fuel supply. To troubleshoot, inspect the relay for corrosion or damage, test continuity with a multimeter, and replace if faulty.
Where is the fuel pump relay on a 1994 Toyota Corolla?
The 1994 Toyota Corolla fuel pump relay, also called the circuit opening relay, is located under the driver's side of the dashboard, near the kick panel, in front of the engine control module (ECM). You may need to remove a plastic cover to access it, which is often secured with a metal bracket and 10mm bolts. Another common location to check is the fuse box under the hood.
This video shows the location of the fuel pump relay under the driver's side dashboard: 55sbriansmobile1YouTube · Aug 2, 2015
Under the dashboard (driver's side)
- Location: Under the driver's side of the dashboard, often between the kick panels (where your feet would be) and in front of the ECM.
- Access: You will likely need to remove a plastic cover or piece to access the relay, which may be held on by a metal bracket and 10mm bolts.
Under the hood
- Location: Check the main fuse box located under the hood.
- Identification: The fuel pump relay is sometimes called the "circuit opening relay" and may be located near other EFI or main relays.
This video shows how to check for the fuel pump relay in the under-hood fuse box: 1mDoctor ResetYouTube · May 19, 2025
Before replacing the relay
- Check fuses: Before replacing the relay, check all related fuses in both the under-hood and interior fuse boxes.
- Test the relay: You can test the relay by swapping it with a similar one (like the EFI relay) to see if the problem moves with the relay, or use a multimeter to check for proper voltage.
What are the symptoms of a failing fuel pump relay?
Symptoms of a bad fuel pump relay include an engine that cranks but won't start, sudden or intermittent stalling, a loss of power while driving, and a rough idle. You may also notice the fuel pump doesn't make its usual humming sound when you turn the key, and the check engine light might illuminate. Other signs are engine misfires and hesitation during acceleration.
Primary symptoms
- Engine won't start or cranks but doesn't start: The engine turns over but doesn't ignite because the relay is preventing fuel from reaching the engine.
- Stalling: The vehicle may stall suddenly while driving or after starting, especially if the relay fails intermittently.
- No fuel pump noise: When you turn the ignition to the "on" position, you won't hear the normal soft whirring sound from the fuel pump as it builds pressure.
Other common symptoms
- Loss of power: You may experience a loss of power, particularly during heavy acceleration or when going uphill.
- Rough idle: The engine may idle roughly or sputter due to an inconsistent fuel supply.
- Engine misfires: The engine may misfire, feeling like a hesitation or stumble, because some cylinders aren't getting enough fuel.
- Check Engine Light: The check engine light may come on as the car's computer detects a problem with fuel delivery.
- Intermittent starting problems: The car may start fine some days and be difficult to start on others, with the problem getting progressively worse over time.
- Unexplained battery drain: A faulty relay that gets stuck in the "on" position can cause the fuel pump to run continuously, leading to a dead battery.
Where is the fuel pump relay located?
The fuel pump relay is most commonly located in the fuse/relay box under the hood, though older cars may have it behind the dashboard or under the driver's side kick panel. The exact location varies by vehicle, so your best bet is to consult your owner's manual or search online for your specific make and model.
This video shows how to locate the fuel pump relay in a car: 21sPhillips VisionYouTube · Jan 3, 2022
Common locations
- Under the hood: Look for a black plastic box, often near the battery, that contains fuses and relays. A diagram on the lid will identify each component.
- Under the dashboard: Some vehicles, especially older ones, may have the relay behind the instrument panel or under the driver's side of the dashboard.
- Driver's side kick panel: In many cases, you can find the relay behind a plastic cover on the driver's side, near where your feet would be.
This video shows how to find the fuel pump relay in a car: 56sCarsNToysYouTube · Jan 28, 2016
Tips for finding it
- Consult your owner's manual: It will have a diagram showing the precise location of the relay.
- Search online: Type your vehicle's year, make, and model with "fuel pump relay location" to find specific diagrams and videos.
- Look for the diagram: Most fuse boxes have a diagram on the inside of the lid that will point out the fuel pump relay.
