1999 Toyota Camry Fuel Pump Fuse Location: The Complete DIY Guide

If your 1999 Toyota Camry cranks but won't start, the fuel pump fuse is one of the first things you should check. The fuel pump fuse on a 1999 Toyota Camry is located in the engine compartment fuse box, labeled as the "EFI" fuse (15 amps). This fuse box sits on the left inner fender near the battery, and the EFI fuse is position number 11 in the fuse box diagram. However, the fuel pump circuit also relies on a second component called the "Circuit Opening Relay," which acts as the actual fuel pump relay. Understanding both parts is critical for a proper diagnosis.

Where Exactly Is the Fuel Pump Fuse?

The 1999 Toyota Camry has two fuse boxes: one inside the cabin and one under the hood. The fuel pump fuse lives in the engine compartment box.

Engine Compartment Fuse Box Location: Open the hood and look toward the left side of the engine bay. You will see a rectangular black plastic box mounted on the inner fender, right next to the battery. This is the main fuse and relay box for your Camry.

Identifying the Correct Fuse: Lift the cover off the fuse box. On the underside of the cover, you will find a diagram showing the location and function of every fuse and relay. Look for a fuse labeled "EFI" (Electronic Fuel Injection). This is the 15-amp fuse that powers the fuel pump circuit. According to the official 1999 Camry fuse box diagram, the EFI fuse is listed as position number 11, rated at 15 amps.

What the EFI Fuse Does: The EFI fuse provides power to the multiport fuel injection system, which includes the fuel pump. If this fuse blows, the fuel pump will not receive power, and your engine will not start.

The Fuel Pump Relay: The Circuit Opening Relay

On the 1999 Toyota Camry, the fuel pump is not controlled by a relay labeled "fuel pump." Instead, Toyota uses a component called the "Circuit Opening Relay."

Where Is the Circuit Opening Relay? This relay is also located inside the engine compartment fuse box. It is not the same as the EFI fuse. The Circuit Opening Relay is a larger, square, black relay with four pins. On the 1999 Camry, it is located toward the rear of the fuse box, and it is clearly labeled on the underside of the fuse box cover.

Note: This relay is sometimes also referred to as the "EFI Main Relay" in some documentation, but the actual relay that controls the fuel pump is the Circuit Opening Relay.

How the Fuel Pump Circuit Works

Understanding the flow of power helps you diagnose problems faster:

  1. When you turn the ignition key to the ON position, the Engine Control Module (ECM) sends a signal to the Circuit Opening Relay.
  2. The Circuit Opening Relay closes, allowing power to flow through the EFI fuse to the fuel pump.
  3. The fuel pump inside the gas tank pressurizes the fuel system for about one to two seconds, then shuts off if the engine does not start.

If any part of this chain fails (blown fuse, bad relay, or faulty wiring), the fuel pump will not run.

How to Test the Fuel Pump Fuse

Before you replace anything, you need to confirm the fuse is actually blown.

Step 1: Locate the Fuse Box – Open the hood and find the engine compartment fuse box on the left fender.

Step 2: Remove the EFI Fuse – Using the fuse puller tool stored in the fuse box cover, remove the 15-amp EFI fuse.

Step 3: Inspect Visually – Hold the fuse up to a light. Look through the clear plastic body. If you see a broken metal strip inside, or if the glass appears dark or metallic, the fuse is blown.

Step 4: Test with a Multimeter – For a more reliable test, use a multimeter. Set it to continuity mode (the symbol that looks like a sound wave). Touch the probes to the two metal prongs on top of the fuse. If the multimeter beeps, the fuse is good. If it does not beep, the fuse is blown.

Step 5: Replace if Necessary – If the fuse is blown, replace it with a new 15-amp fuse. Never use a higher amperage fuse, as this can damage wiring or cause a fire.

How to Test the Circuit Opening Relay

If the fuse is good but the pump still does not run, test the relay.

Step 1: Locate the Relay – Find the Circuit Opening Relay in the engine compartment fuse box.

Step 2: Swap with a Known Good Relay – The easiest test is to find another relay in the same fuse box that looks identical (same number of pins and same size). Pull out the Circuit Opening Relay and swap it with, for example, the horn relay or the headlight relay. If the car starts after the swap, the original relay is bad.

Step 3: Listen for the Click – Have a helper turn the ignition key to ON while you listen near the fuse box. You should hear a distinct click from the Circuit Opening Relay. If you hear no click, the relay is not receiving power or is faulty.

Common Symptoms of a Bad Fuel Pump Fuse or Relay

Knowing these signs helps you diagnose the problem without guesswork:

1. Engine Cranks But Does Not Start – This is the most common symptom. The starter motor turns the engine over, but the engine never fires because no fuel is reaching the injectors.

2. No Fuel Pump Noise – When you turn the key to the ON position, you should hear a brief whirring sound from the rear of the car (the fuel pump priming). If you hear nothing, the pump is not getting power.

3. Car Stalls While Driving – A failing relay or intermittent fuse connection can cause the fuel pump to lose power while the engine is running, causing the car to stall suddenly.

4. Long Starting Time – If the car takes longer than usual to start, the relay might be failing intermittently, or the fuse might have a poor connection.

5. Check Engine Light – A faulty fuel pump circuit can trigger the Check Engine Light with codes related to fuel system or fuel pump circuit malfunction.

How to Check If the Fuel Pump Is Actually Running

Before you dig into wiring diagrams, perform this simple test:

Listen at the Fuel Filler Cap – Open the fuel filler door and remove the gas cap. Have an assistant turn the ignition key to ON (not START). Put your ear close to the filler neck. You should hear a faint humming or whirring sound for about one to two seconds. If you hear nothing, the pump is not running.

Check Voltage at the Pump – If you are comfortable working with electrical systems, you can test for voltage at the fuel pump connector. The fuel pump is located inside the fuel tank. You will need to access the wiring harness connector near the top of the tank. With the key ON, you should see battery voltage (around 12 volts) on the power wire for those two seconds.

What To Do If the Fuse Keeps Blowing

If you replace the EFI fuse and it blows again immediately, you have a short circuit somewhere in the fuel pump wiring. This is a more serious problem.

Possible Causes:

  • A shorted fuel pump motor inside the tank
  • Chafed or damaged wiring between the fuse box and the fuel pump
  • A faulty Circuit Opening Relay that is stuck closed, causing the pump to run continuously and overheat the circuit

Recommended Action: If the fuse blows repeatedly, stop replacing fuses. Have the fuel pump and wiring inspected by a professional mechanic. Driving with a shorted fuel pump circuit can cause a fire.

Why the Fuel Pump Fuse and Relay Are Critical

The fuel pump fuse and relay work together as a safety system. The relay ensures the pump only runs when the engine is cranking or running, preventing the pump from running dry if the car is in an accident. The fuse protects the wiring from overheating if the pump draws too much current. Keeping these components in good condition is essential for reliable operation.

Step-by-Step Diagnostic Flow

Follow this order to save time and avoid unnecessary part replacements:

1. Check the EFI fuse – Inspect it visually and test with a multimeter.

2. Listen for the fuel pump – Turn the key to ON and listen for the pump priming sound.

3. Test the Circuit Opening Relay – Swap it with a known good relay from the same fuse box.

4. Check for voltage at the pump – If you have a multimeter, test the plug at the fuel tank.

5. Inspect wiring – Look for damaged or corroded wires between the fuse box and the fuel tank.

Why Proper Diagnosis Matters

Many DIY mechanics replace the fuel pump first, only to find out the problem was a simple blown fuse or a bad relay. The fuel pump itself is inside the gas tank, and replacing it requires dropping the tank or cutting an access panel. That is a lot of work for a problem that can be fixed with a $2 fuse or a $20 relay. Always check the fuse and relay first.

Tools You Will Need

  • Multimeter – For testing fuse continuity and voltage
  • Fuse puller – Usually included in the fuse box cover
  • Replacement 15-amp fuse – Standard mini blade fuse
  • Replacement Circuit Opening Relay – Available at auto parts stores
  • Flashlight – For seeing the fuse box diagram clearly
  • Owner's manual – Provides the official fuse box diagram for your specific vehicle

KEMSO Fuel Pump: The Best Upgrade for Your 1999 Toyota Camry

If you have confirmed that the fuse and relay are good, and the fuel pump itself has failed, you need a reliable replacement. This is where KEMSO Fuel Pumps come in.

KEMSO Fuel Pumps are high-performance, direct OEM replacement pumps designed to match the exact specifications of your original equipment. Whether you drive a daily commuter or need extra performance, KEMSO has a pump that fits your needs. KEMSO pumps are built with high-quality materials that resist corrosion and wear, and the motor is sealed to prevent fuel contamination.

Every KEMSO Fuel Pump comes with a lifetime warranty. If your pump ever fails due to a manufacturing defect, KEMSO replaces it free of charge. No questions, no hassle. This level of confidence is rare in the aftermarket parts industry. KEMSO has built its reputation on providing this lifetime warranty for all its OEM and performance fuel pumps.

KEMSO pumps are designed as direct OEM replacements. The wiring connector matches the original, so you do not need to cut or splice wires. Each pump includes the necessary hardware and instructions for installation. Whether you have a 1999 Toyota Camry with the 2.2L engine or any other vehicle, KEMSO covers hundreds of models from 1990 to present.

For the best performance and long-term reliability, choose KEMSO. Visit the KEMSO website today to find the correct fuel pump for your vehicle. Their team can help you confirm compatibility and answer any questions about installation.

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Final Thoughts

Finding the 1999 Toyota Camry fuel pump fuse location is straightforward. Open the hood, look at the fuse box on the left fender, and find the 15-amp EFI fuse. If that fuse is good, check the Circuit Opening Relay in the same fuse box. These two components control the entire fuel pump circuit. Always start your diagnosis here before replacing the fuel pump itself. A simple fuse or relay replacement can save you hundreds of dollars and hours of labor. And if you do need a new fuel pump, trust KEMSO for a reliable, lifetime-guaranteed replacement.

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