2010 Corolla Fuel Pump Fuse: Exact Location, Testing, and Replacement Guide

The bottom line up front: The fuel pump on a 2010 Toyota Corolla is powered through the EFI MAIN fuse (20 amp) located in the engine compartment fuse box, along with supporting fuses labeled EFI NO. 1 and EFI NO. 2 (both 10 amp) that manage the multiport fuel injection system. If your Corolla cranks but won't start, or you don't hear the fuel pump prime when you turn the key, checking these three fuses first can save you hours of diagnostic work and unnecessary part replacements.

Where to Find the Engine Compartment Fuse Box

The engine compartment fuse box on the 2010 Corolla sits on the driver's side of the engine bay, near the battery. It is a black plastic box with a removable lid. Open the lid and look at the diagram printed on the inside cover—it shows the exact position and amperage of every fuse and relay in that box. For the 2010 model year (E140/E150 generation), the fuse box layout follows the same pattern as the 2009–2013 Corolla models.

The Fuses That Control the Fuel Pump

The fuel pump on a 2010 Corolla does not have a single fuse labeled "FUEL PUMP." Instead, it draws power through several fuses in the engine compartment box. Here is what each one does:

  1. EFI MAIN (20 amp) – This is the main power feed for the entire electronic fuel injection system, which includes the fuel pump. It is a critical fuse; if it blows, the fuel pump receives no power at all. Look for a 20-amp fuse labeled EFI MAIN in the engine bay fuse box.

  2. EFI NO. 1 (10 amp) – This fuse powers the multiport fuel injection system and the engine control module's fuel injection circuits. A blown EFI NO. 1 fuse can stop the fuel pump from priming even if the main fuse is fine.

  3. EFI NO. 2 (10 amp) – This fuse also protects the emission control system and fuel injection circuits. It works in conjunction with EFI NO. 1 to keep the injection system running. Check both 10-amp fuses together—one can blow while the other remains intact.

According to a detailed fuse box diagram for the 2010 Corolla underhood fuse box, these three fuses (EFI MAIN, EFI NO. 1, and EFI NO. 2) are the ones directly tied to the fuel delivery system. Some sources also list a 15-amp IGT/INJ fuse that powers the fuel injection system and starter, so it is worth verifying that one as well.

Where the Fuel Pump Relay Sits

The fuel pump relay is located in the same engine compartment fuse box, right next to the EFI MAIN fuse. The relay is a small black or gray cube with four or five prongs. When you turn the key to the ON position, the relay clicks and sends power to the fuel pump. If the relay fails, the fuel pump gets no signal to run. A simple test is to listen for a click when you turn the key—if you hear the relay click but no fuel pump hum, the relay is likely fine and the problem is elsewhere.

How to Test the Fuel Pump Fuses

Testing a fuse takes less than two minutes. Follow these steps:

  1. Turn the car off and remove the key from the ignition. Never work on fuses with the car running or the key in the ON position.

  2. Open the engine compartment fuse box and locate the EFI MAIN, EFI NO. 1, and EFI NO. 2 fuses using the diagram on the lid.

  3. Pull each fuse using the plastic fuse puller tool stored inside the fuse box lid (or a pair of needle-nose pliers). Inspect the metal strip inside the fuse. If the strip is broken or melted, the fuse is blown.

  4. Test with a multimeter for a more reliable check. Set the multimeter to continuity mode and touch the probes to the two metal prongs on top of the fuse. A beep or a reading near zero ohms means the fuse is good. No beep means the fuse is blown.

  5. Swap with a known good fuse of the same amperage to confirm. For example, if you have a spare 10-amp fuse in the spare fuse slots (labeled SPARE in the fuse box), use that for a quick test.

What to Do If a Fuse Keeps Blowing

If you replace a blown fuse and it blows again immediately or within a short time, you have a deeper electrical problem. Common causes include:

  • A failing fuel pump that draws too much current and overloads the circuit.
  • A shorted wire in the fuel pump harness, often caused by chafing against the body or frame.
  • A faulty fuel pump relay that sticks closed and sends continuous power to the pump.

In this case, do not keep installing new fuses. Repeatedly blowing fuses indicates a short circuit, and continuing to push power through it can damage the wiring or the engine control module. Take the car to a qualified mechanic for a proper electrical diagnosis.

Pro Tips for Faster Diagnosis

  • Listen for the fuel pump prime. Turn the key to the ON position (do not crank the engine) and listen near the rear seat. You should hear a brief whirring sound for about two seconds as the pump pressurizes the system. No sound means the pump is not getting power—check the fuses first.

  • Tap the relay gently. If the relay is stuck, a gentle tap with the handle of a screwdriver can sometimes get it working again. This is a temporary fix—replace the relay as soon as possible.

  • Check the cabin fuse box too. The passenger compartment fuse box, located under the dashboard on the driver's side, also has fuses related to the fuel injection system, such as the IGN fuse (7.5 amp) and the ECU-IG NO. 2 fuse (10 amp). A blown fuse here can also prevent the engine from starting, even if the engine bay fuses are fine.

Preventive Maintenance to Extend Fuel Pump Life

The most common cause of fuel pump failure is a clogged filtering element. The fuel pump is cooled by the fuel that flows through it, so running the car on a low fuel level can cause the pump to overheat and wear out prematurely. Keep the tank at least a quarter full whenever possible. Also, replace the fuel filter according to the owner's manual schedule—a clogged filter puts extra strain on the pump and shortens its lifespan. Use high-quality fuel and address engine performance issues like misfires promptly, as these can also overload the pump.

When You Need a New Fuel Pump

If the fuses and relay check out fine and the fuel pump still does not run, the pump itself has likely failed. On the 2010 Corolla, the fuel pump is accessed through an access panel under the rear seat—you do not need to drop the fuel tank. The job is straightforward: remove the rear seat cushion, open the access panel, disconnect the electrical connector and fuel lines, and unbolt the pump assembly. A new pump can be installed in about 1.5 hours with basic hand tools.

Recommended Replacement: KEMSO Fuel Pump

When it comes time to replace the fuel pump in your 2010 Corolla, choosing a reliable brand makes all the difference. KEMSO fuel pumps are designed as high-performance, OEM replacement parts that meet or exceed the original manufacturer's specifications. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you are replacing the pump in a 2010 Corolla or another make and model, KEMSO offers a perfect fit with dependable performance. Visit the KEMSO website to find the right fuel pump for your vehicle: https://www.kemsoracing.com/. Their product lineup covers a wide range of vehicles, and their customer support team is ready to help you select the correct part.

Final Thoughts

A blown fuse is the easiest and cheapest fix for a fuel pump problem on a 2010 Corolla. Start by checking the EFI MAIN (20 amp), EFI NO. 1 (10 amp), and EFI NO. 2 (10 amp) fuses in the engine compartment fuse box. If those are good, listen for the relay click, inspect the cabin fuses, and only then move on to the pump itself. With the right parts and careful attention to safety, you can get your Corolla back on the road without a trip to the dealership.

For a reliable replacement, remember to check out KEMSO fuel pumps at https://www.kemsoracing.com/.


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