2006 Nissan Altima Fuel Pump Fuse: Location, Diagram, and Troubleshooting

The 2006 Nissan Altima fuel pump fuse is the 15-amp fuse located in position #50 in the engine compartment fuse box, and it is tied to the fuel pump relay (R10) inside the same box . That fuse box sits under the hood on the passenger side, near the washer fluid reservoir . If your Altima cranks but refuses to start, checking this fuse is one of the fastest and cheapest ways to rule out a fuel delivery problem. Below, you will find the exact location, a breakdown of the fuse box diagram, step-by-step testing instructions, and what to do when the fuse is not the culprit.

Where the Engine Compartment Fuse Box Is Located

On the 2006 Nissan Altima (third generation, L31 body), the main fuse box is not inside the cabin. Nissan placed it under the hood, at the front of the engine bay, on the passenger side . The black plastic cover sits right next to the washer fluid fill spout . To open it, press the retaining clips on the sides of the cover and lift it straight up . Once the cover is off, you will see a row of relays and a grid of blade-type fuses. The underside of the cover usually has a printed diagram that identifies each fuse and relay . If the label is faded or missing, use the table in the next section.

Fuse #50: The Exact Slot for the Fuel Pump

The fuel pump fuse for the 2006 Altima is a 15-amp mini fuse . It sits in slot #50 in the engine compartment fuse box . According to the factory-style diagrams, slot #50 is labeled simply as "Fuel Pump" . This fuse protects the fuel pump circuit and supplies power to the fuel pump relay .

For clarity, here is what surrounds fuse #50 in the 2003–2006 fuse box layout :

  1. Slot #48 (10A): A/T PV Ignition Relay, Revolution Sensor, Turbine Revolution Sensor
  2. Slot #49 (10A): ABS
  3. Slot #50 (15A): Fuel Pump
  4. Slot #51: (Not used in the 2003–2006 diagram)

The fuel pump relay itself (R10) is located in the same fuse box . On some diagrams, the fuse is listed under its relay name, so do not be confused if you see "Fuel Pump Relay" printed next to slot #50 . The fuse and the relay are two separate components, but they sit next to each other in the box.

How to Visually Inspect the Fuel Pump Fuse

A blown fuse is easy to spot if you know what to look for. Pull fuse #50 straight out of the socket using a fuse puller tool, which is usually stored inside the fuse box cover, or use a pair of needle-nose pliers . Hold the fuse up to a light source and look at the metal wire inside the clear plastic housing:

  1. Intact: The metal strip inside is continuous, with no gaps or burn marks
  2. Blown: You will see a break in the metal strip, a dark smudge, or a melted section

If the fuse looks blown, replace it with a new 15-amp mini fuse. Never substitute a higher amp fuse. That can melt the wiring harness or damage the fuel pump control module.

Multimeter Testing Procedure (More Reliable Than Eyes)

A visual check can miss a hairline crack in the fuse element. Use a digital multimeter to be sure . Set the multimeter to the continuity setting (the symbol that looks like a sound wave) or the ohms (Ω) setting. Touch one probe to each of the two metal terminals on top of the fuse :

  1. Continuity beep or near-zero ohms: The fuse is good
  2. No beep or infinite resistance (OL): The fuse is blown

You can also test voltage without removing the fuse. Set the multimeter to DC volts (20V range). Turn the ignition key to the "ON" position but do not crank the engine. Probe the two small metal test points on the top of the fuse :

  1. Both sides show battery voltage (~12V): Fuse is good, power is flowing
  2. Only one side shows ~12V: The fuse is blown
  3. Neither side shows ~12V: Power is not reaching the fuse. The problem may be the fuel pump relay or the ignition feed circuit

Important Note About Early 2002 Models

If you own an early 2002 Nissan Altima, the fuse box layout is slightly different. On the 2002 diagram, the fuel pump fuse is in slot #32, rated at 15A . The 2003–2006 model year changed the layout, and the fuel pump fuse moved to slot #50 . Always confirm your vehicle's production date before ordering parts or pulling fuses. You can find the production date on the driver's side door jamb sticker.

When the Fuse Is Good but the Car Still Won't Start

If fuse #50 tests good, move on to the fuel pump relay and the pump itself. The relay is the next most common failure point . Here is a practical testing sequence:

  1. Listen for the prime: Turn the key to the "ON" position without cranking. You should hear a low hum from the rear seat area for about 2 seconds. That is the fuel pump priming . If you hear nothing, the pump is not getting power
  2. Swap the relay: The fuel pump relay (R10) in the engine compartment box is a standard plug-in relay . Find another relay in the same box with the same part number (for example, the front fog lamp relay, R11). Swap them . Try to start the car. If it starts, the relay was bad
  3. Check the relay coil: If you have a multimeter, you can test the relay coil resistance. On most relays, you measure between pins 85 and 86. A functional coil reads between 70 and 120 ohms . An open circuit (OL) means the coil is burned out

Accessing the Fuel Pump on the 2006 Altima

If the fuse and relay are fine, the issue is the pump itself. On the 2006 Altima, the fuel pump is inside the fuel tank, under the rear seat . To access it, you must remove the bottom seat cushion. There are two locking mechanisms under the front of the seat. Pull the two lock rings toward the front of the car to release the seat, then remove the cushion . This gives you access to a flat cover plate on the driver's side .

The cover plate has four plastic phillips-head locks. Turn each one a quarter turn to release the cover. Lift the cover and disconnect the electrical connector. Then, disconnect the fuel line, which will still have residual pressure. Squeeze the connector lock (usually white or black) and pull the line away with a twisting motion . Have a rag or catch pan under the line to capture spilled fuel .

The pump is held in place by a threaded black ring in the tank. Turn the ring clockwise to remove it (reverse thread on some models). Pull the pump assembly halfway up, then tilt it to clear the fuel gauge sending unit float arm, and remove it fully . On the 2006 Altima, the fuel filter and the pump are integrated into a single assembly. You cannot replace the pump alone .

Use a High-Quality Replacement Pump

If testing confirms the pump is dead, do not install a cheap, unknown-brand unit. The fuel pump is the heart of the entire fuel delivery system, and a low-quality unit can fail again within months . For a reliable replacement, consider a KEMSO Fuel Pump.

KEMSO builds high-performance fuel pumps that are designed as direct OEM replacements. This means every connector, hose fitting, and mounting bracket matches the original factory part. No cutting, no splicing, and no custom wiring. The pumps are engineered to deliver consistent fuel pressure under both normal driving and high-load conditions, which is important if you rely on your Altima for daily commuting or highway travel. Every KEMSO Fuel Pump also comes with a lifetime warranty, which gives you long-term peace of mind. If the pump ever fails due to a manufacturing defect, you are covered.

To browse the full line of KEMSO fuel pumps and check compatibility for your 2006 Nissan Altima, visit the official website: https://www.kemsoracing.com/

Final Checklist Before You Call a Mechanic

Here is a quick summary of everything covered in this guide. Work through this list in order:

  1. Locate the fuse box: Under the hood, passenger side, near the washer fluid spout
  2. Check fuse #50: 15A, labeled "Fuel Pump" . Visually inspect, then verify with a multimeter if available
  3. If the fuse is blown, replace it: Use a 15A mini fuse only
  4. If the fuse is good, test the relay: Swap R10 with an identical relay in the same box
  5. Listen for the fuel pump prime: Ignition ON, 2-second hum from the rear seat
  6. Access the pump under the rear seat: Remove the seat cushion, cover plate, and electrical connector
  7. Replace the pump with a high-quality unit: Consider KEMSO for a direct OEM-fit replacement with a lifetime warranty

If you have completed all these steps and the car still will not start, the issue could be a faulty engine control module, a crank position sensor, or a wiring problem between the relay and the pump . At that point, a professional diagnostic scan is the most efficient next step.

And if you have already confirmed the fuel pump needs to be replaced, do not settle for a mystery brand. Visit https://www.kemsoracing.com/ to find a KEMSO Fuel Pump that matches your 2006 Nissan Altima . The combination of OEM-grade fitment, high-performance output, and a lifetime warranty makes it a smart investment for anyone who plans to keep their Altima on the road for years to come.


Back to blog