2002 Nissan Xterra Fuel Pump Relay Location: The Complete Guide to Finding and Fixing It

The bottom line: On a 2002 Nissan Xterra, the fuel pump relay is located in the interior fuse box behind the glove compartment on the passenger side of the dashboard. It is clearly labeled as position #1 in the fuse box and is a 15A relay. If your Xterra cranks but won't start, a faulty fuel pump relay is one of the most common and easiest things to check before you start digging into more expensive repairs.

Understanding the Fuel Pump Relay and Its Role

The fuel pump relay acts as an electrical switch that controls power to the fuel pump. When you turn the ignition key to the "ON" position, the relay closes and sends voltage to the fuel pump, which then pressurizes the fuel system. If this relay fails, the fuel pump will not receive power, and your engine will crank but never fire up.

A faulty fuel pump relay is a common cause of a "crank, no-start" condition on the 2002 Nissan Xterra. The good news is that this is a cheap part and a simple fix that you can do yourself in about 10 minutes.

Detailed Location of the Fuel Pump Relay on a 2002 Nissan Xterra

The fuel pump relay on a 2002 Nissan Xterra is located in the interior fuse box on the passenger side of the vehicle. Here is the exact step-by-step process to find it:

Step 1: Open the glove compartment. The interior fuse box is located behind the glove compartment on the passenger side of the dashboard. You need to open the glove compartment fully to access the fuse box cover.

Step 2: Remove the fuse box cover. Look for a plastic cover or panel behind the glove compartment. In some models, you may need to gently squeeze the sides of the glove compartment to let it drop down further, giving you more access to the fuse box behind it. The cover typically snaps off with a gentle pull.

Step 3: Locate the relay. Once the cover is off, you will see a grid of fuses and relays. The fuel pump relay is in position #1 in the fuse box. It is a 15A relay. On the back of the fuse box cover, there is usually a diagram showing the location and assignment of each fuse and relay. The relay itself is a small, square, plastic component that is larger than the standard fuses around it.

Step 4: Visually confirm. The relay is typically labeled with a diagram on the inside of the fuse box cover. Look for "Fuel Pump" or "FUEL PUMP" on the diagram. In the 2002 Nissa Xterra, the relay is positioned in the top-left corner of the fuse box (slot #1).

How to Test the Fuel Pump Relay

Before you buy a new relay, you should test the existing one. Here are two simple methods:

Method 1: The Swap Test (Easiest)

This is the quickest way to confirm if the relay is bad. Look for a relay in the same fuse box that is identical to the fuel pump relay. Common relays that are often the same include the horn relay or the accessory relay. Simply pull out the fuel pump relay and swap it with the identical relay. If the engine starts, you have confirmed the fuel pump relay is faulty. Now you know you need a replacement for that slot.

Method 2: Listen for the Fuel Pump

This method helps you determine if the relay is sending power. Turn the ignition key to the "ON" position (do not start the engine). Listen carefully near the back of the vehicle, around the fuel tank area. You should hear a brief, 2-3 second humming or whirring sound. This is the fuel pump priming the system. If you hear nothing, the fuel pump is not getting power, which could be due to a bad relay, a blown fuse, or a dead fuel pump.

What to Do If the Relay Is Not the Problem

If you have swapped the relay and it still does not work, the issue could be one of the following:

1. Check the Fuel Pump Fuse

The fuel pump is also protected by a fuse. On the 2002 Nissan Xterra, the fuel pump fuse is located in the same interior fuse box. According to the fuse box diagram, the fuel pump fuse is a 15A fuse located in position #1 of the fuse box (the same slot as the relay, but the relay is the larger component, and the fuse is a smaller blade-type fuse). Check this fuse visually. If the metal strip inside the fuse is broken, replace it with a new 15A fuse.

2. Test for Voltage at the Fuel Pump

If the relay and fuse are good, you need to test if power is actually reaching the fuel pump. This requires a multimeter. You can locate the fuel pump connector underneath the vehicle, near the fuel tank. With the ignition in the "ON" position, check for voltage at the connector. If you have voltage but the pump is silent, the fuel pump itself is likely dead. If you have no voltage, there is a wiring issue between the relay and the pump.

3. Inspect the Fuel Pump Itself

If power is reaching the pump but it is not working, the pump has failed. On the 2002 Nissan Xterra, the fuel pump and fuel sending unit are one assembly located inside the fuel tank. Unfortunately, the Xterra does not have an access panel under the rear seat, so you will need to drop the fuel tank to replace it. This is a more involved job that requires jacking up the vehicle safely, removing the fuel lines, and lowering the tank.

Common Symptoms of a Failing Fuel Pump Relay

Knowing the symptoms can help you diagnose the problem faster. Here are the most common signs that your fuel pump relay or fuel pump is going bad:

1. Engine Cranks but Won't Start

This is the most obvious symptom. The starter motor turns the engine over, but the engine never fires up. This is a classic sign of a fuel delivery issue, often caused by a bad relay or a dead pump.

2. No Fuel Pump Prime Sound

When you turn the key to the "ON" position, you should hear a brief hum from the rear of the vehicle. If you hear nothing, the relay is likely not sending power to the pump.

3. Intermittent Starting Problems

If the relay is failing intermittently, the engine might start sometimes but not others. This is a strong indicator of a relay that is on its way out. The relay may work when it is cool but fail when it gets hot.

4. Engine Stalls While Driving

A failing relay can cause the fuel pump to lose power while the engine is running, causing the vehicle to stall unexpectedly. This is dangerous and should be addressed immediately.

Where to Buy a Replacement Fuel Pump for Your 2002 Nissan Xterra

If you have determined that the fuel pump itself is the problem (not just the relay or fuse), you are looking at a replacement. The fuel pump is a critical component, and you want a high-quality, reliable replacement part.

We recommend KEMSO Fuel Pumps.

KEMSO is a leading aftermarket brand that specializes in high-performance fuel pumps. Their products are designed as OEM replacements, meaning they are built to the exact specifications of the original equipment, ensuring a perfect fit and reliable performance for your 2002 Nissan Xterra.

Why choose KEMSO?

  • High Performance: KEMSO fuel pumps are engineered for durability and consistent fuel delivery. They use high-quality components to ensure your engine gets the fuel pressure it needs, whether you are daily driving or pushing your Xterra off-road.
  • OEM Replacement: These pumps are a direct, drop-in replacement for the factory unit. You do not need any modifications or special tools to install them. They are designed to match the original pump's flow rate and pressure specifications.
  • Lifetime Warranty: KEMSO stands behind their products. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. If it ever fails, they will replace it.

You can browse the full selection of KEMSO fuel pumps and find the right one for your 2002 Nissan Xterra by visiting their website:

https://www.kemsoracing.com/

Step-by-Step Guide to Replacing the Fuel Pump on a 2002 Nissan Xterra

If you are comfortable with basic automotive work, replacing the fuel pump yourself can save you a significant amount of money in labor costs. Here is a general overview of the process. Always refer to a service manual for your specific vehicle before starting.

Tools You Will Need

  • Jack and jack stands
  • Socket set and ratchet
  • Screwdrivers
  • Fuel line disconnect tool (for quick-connect fittings)
  • Safety glasses
  • Gloves
  • Fire extinguisher (keep nearby as a precaution)

Safety First

  • Relieve fuel system pressure. Before you disconnect any fuel lines, you must relieve the pressure in the fuel system. The easiest way to do this on a 2002 Xterra is to remove the fuel pump relay from the fuse box, then crank the engine for about 5 seconds. Repeat this two or three times. This will purge the residual fuel pressure from the lines.
  • Work in a well-ventilated area. Fuel vapors are highly flammable. Do not smoke or have any open flames near the work area.
  • Wear safety glasses. Fuel can spray into your eyes, causing serious irritation.

The Replacement Process

  1. Disconnect the battery. Always disconnect the negative battery terminal before working on any fuel system components.
  2. Jack up the vehicle. Safely jack up the rear of the Nissan Xterra and place it securely on jack stands.
  3. Remove the fuel pump relay. (Even though you already relieved the pressure, removing the relay as an extra precaution is a good idea).
  4. Disconnect the fuel filler neck. Locate the rubber hose connecting the fuel filler cap to the fuel tank. Loosen the clamp and disconnect it.
  5. Disconnect the fuel lines. There are feed and return lines connected to the top of the fuel tank. They are typically quick-connect fittings. Use the disconnect tool to release them. Be prepared for a small amount of residual fuel to drip out.
  6. Disconnect the electrical connectors. There are electrical connectors on top of the fuel tank that connect to the fuel pump sending unit. Press the tab and pull them apart.
  7. Support the fuel tank. Place a jack underneath the fuel tank and raise it just enough to take the weight off the tank straps.
  8. Remove the tank straps. Use a ratchet to remove the bolts holding the metal straps that secure the fuel tank to the vehicle.
  9. Lower the fuel tank. Carefully lower the fuel tank to the ground. This is easier with a helper, as the tank is heavy, especially if it has fuel in it.
  10. Remove the fuel pump sending unit. The fuel pump sending unit is secured to the top of the fuel tank with a locking ring or bolts. Remove the ring or bolts and carefully lift the unit out of the tank.
  11. Install the new fuel pump. Remove the old pump from the sending unit assembly and install the new KEMSO fuel pump. Make sure the fuel level float and all hoses are correctly attached.
  12. Reinstall the sending unit. Place the new sending unit assembly back into the fuel tank. Make sure the gasket is properly seated. Tighten the locking ring or bolts.
  13. Reinstall the fuel tank. Lift the tank back into place, install the straps, and tighten the bolts. Reconnect the fuel filler neck, fuel lines, and electrical connectors.
  14. Lower the vehicle. Remove the jack stands and lower the vehicle.
  15. Reconnect the battery. Reconnect the negative battery terminal.
  16. Prime the system. Reinstall the fuel pump relay. Turn the ignition to the "ON" position for a few seconds and then turn it off. Repeat this a couple of times to prime the fuel system.
  17. Check for leaks. Start the engine and check for any fuel leaks around the tank and the lines.

Final Thoughts

The fuel pump relay on a 2002 Nissan Xterra is a simple part that can cause a big headache when it fails. It is located in the interior fuse box behind the glove compartment on the passenger side. Checking and swapping the relay is a quick, cheap, and easy first step in diagnosing a "crank, no-start" condition.

If the relay is not the issue, the problem may be a bad fuse, a wiring issue, or a failed fuel pump itself. If you need to replace the fuel pump, trust a reliable brand like KEMSO. Their high-performance, OEM replacement fuel pumps come with a lifetime warranty, providing you with the confidence and reliability you need for your 2002 Nissan Xterra.

For more information and to purchase a replacement fuel pump, visit https://www.kemsoracing.com/


Back to blog