Problems starting the engine Nissan Murano Z50 are often associated with a faulty fuel pump - but before replacing an expensive component, it is worth checking its fuse. This small element protects the circuit from overloads, and its failure can simulate a breakdown of the pump itself. In this article we will look at where the fuel pump fuse is located on Murano Z50 (including restyled versions 2011–2014), how to check and replace it, as well as what signs indicate this particular malfunction.
Feature Murano Z50 The problem is that the fuel pump fuse can be located in different blocks depending on the year of manufacture and configuration. For example, in models before 2010 it is often located in the cabin unit, and in newer ones - in the engine compartment. We'll look at both options in detail so you don't waste time searching. You will also learn how to distinguish a blown fuse from problems with the relay or the pump itself, and what to do if after replacing the fuel pump still does not work.
Where is the fuel pump fuse located? Nissan Murano Z50
B Murano Z50 The fuel pump fuse can be located in one of two places:
- 🔧 Cabin fuse box (under the driver's side panel) - relevant for most models up to 2010.
- 🚗 Engine compartment fuse box (next to the battery) - typical for restyled versions of 2011–2014.
To accurately determine the location, pay attention to the markings. Fuel pump fuse Murano Z50 usually designated as Fuel Pump or FP with par value 15A. In the cabin unit it may be numbered #20 or #25 (depending on the year), and in the engine compartment - #30 or #35.
If you are not sure which fuse is responsible for the fuel pump, use the diagram on the inside of the block cover. On Murano Z50 after 2012, schemes are often duplicated in Russian. If there is no diagram, take a photo of the block and check the official manual (see the section on documentation).
- Inside
- Under the hood
- I don't know
- Another option
Signs of a faulty fuel pump fuse
Blown fuel pump fuse Murano Z50 manifests itself in the same way as a breakdown of the pump itself. Main symptoms:
- ⚡ Engine won't start or starts with difficulty (you need to turn the starter for a long time).
- ⛽ When turning the key I can't hear the fuel pump running (there is no characteristic buzzing in the rear of the car).
- ⚠️ The dashboard may light up Check Engine, but the error does not always indicate the fuse.
- 🔄 Engine stalls while driving (if the fuse blows while driving).
It is important to distinguish problems with the fuse from problems with the relay or the pump itself. For example, if when you turn on the ignition you hear a click from the relay, but the pump does not work, either the fuse or an open circuit is to blame. If there is no click, the problem may be in the relay or its control (for example, a faulty ECU).
Before checking the fuse, make sure there is enough fuel in the tank - Murano Z50 may not start if the gasoline level is below 5 liters, even with a working pump.
How to check the fuel pump fuse Murano Z50
Checking the fuse takes no more than 5 minutes. You will need:
- 🔦 Flashlight (to inspect the unit in the cabin).
- 🛠️ Tweezers or a small screwdriver (for removing the fuse).
- 🔋 Multimeter (optional, for accurate checking).
Algorithm of actions:
- Turn off the ignition and open the fuse box cover (in the passenger compartment or under the hood).
- Find the fuse
Fuel Pump(see diagram on the cover or in the manual). - Remove the fuse with tweezers and inspect it. Blown fuse will have a broken thread inside or blackened contacts.
- If everything is visually in order, check it with a multimeter in continuity mode. A good fuse should show zero resistance.
If the fuse is intact, but the fuel pump does not work, check fuel pump relay (usually located next to the fuse) and the power circuit. On Murano Z50 a relay is often designated as Fuel Pump Relay and has a number #5 or #10 in the salon block.
What to do if the fuse is apparently intact, but the pump does not work?
In this case, the problem may be in the oxidized contacts of the fuse box. Try cleaning them with alcohol or a special cleaner, and also check the voltage at the fuse terminal with the ignition on (should be ~12V).
Step-by-step replacement of the fuel pump fuse
If the fuse is blown, it must be replaced with a new one the same rating (15A). Using a fuse with a different rating may result in a fire or damage to the electrical wiring!
Replacement instructions:
☑️ Replacing the fuel pump fuse
After replacing the fuse, try starting the engine. If it starts normally, the problem is solved. If the fuse blows again, this indicates short circuit in the fuel pump circuit. In this case, diagnostics of the wiring or the pump itself is required.
⚠️ Attention: If the new fuse blows immediately after installation, do not try to install a fuse of a higher rating (for example, 20A or 25A). This may cause the wiring to catch fire! It is necessary to look for the cause of the short circuit.
Common Causes of a Blown Fuse
Fuel pump fuse Murano Z50 It rarely fails just like that. Most often this happens due to:
| Reason | How it manifests itself | What to do |
|---|---|---|
| Short circuit in wiring | The fuse blows immediately after replacement | Check the circuit with a multimeter for a short to ground. |
| Fuel pump wear | The pump is overloaded, the fuse burns intermittently | Measure the current consumption of the pump (the norm is ~5–7A, if more, the pump is faulty) |
| Poor contact in the pump connector | The fuse lights up during vibration or after washing | Clean contacts, treat with dielectric grease |
| Faulty fuel pump relay | The fuse lights up when the ignition is turned on | Replace the relay (costs ~300–500 rubles) |
On Murano Z50 with a mileage of more than 150 thousand km, a common cause of fuse blown is wear on fuel pump brushes. In this case, the pump begins to consume increased current, which triggers the protection. If the fuse burns regularly, it is recommended check the current consumption of the pump with a multimeter in current measurement mode (connecting in series). Exceeding 10A indicates the need to replace the pump.
What to do if replacing the fuse does not help
If the fuel pump still does not work after replacing the fuse, check the following items:
- 🔌 Fuel pump relay - It should click when you turn on the ignition. If not, replace the relay or check its control (power supply to the coil).
- 🔋 Power to the fuel pump — there should be ~12V at the pump connector (under the rear seat) when the ignition is on.
- 📶 Fuel pump weight - often oxidizes or comes off on the body under the rear seat.
- 🛠️ The fuel pump itself - if there is power, but the pump does not hum, it may have burned out (check by replacing it with a known good one).
On Murano Z50 with the system Nissan Intelligent Key (keyless entry) there is a specific problem: the fuel pump does not turn on due to a malfunction in the immobilizer. In this case, the key icon may flash on the dashboard. The solution is to reprogram the key or reset errors through a diagnostic scanner.
⚠️ Attention: If during the check you find that there is no power at the fuel pump connector, but the fuse and relay are working, Damage to the wiring is possible between the fuse box and the pump. On Murano Z50 Wires often fray under the threshold on the driver's side.
Tips for preventing problems with the fuel pump
To keep the fuse and fuel pump on Murano Z50 last longer, follow these recommendations:
- ⛽ Don't drive with an almost empty tank — the fuel pump is cooled by fuel, and when the level is low it overheats.
- 🔧 Change the fuel filter every 40–50 thousand km (a clogged filter increases the load on the pump).
- 🚿 Avoid gas stations with questionable fuel — impurities in gasoline accelerate pump wear.
- 🔋 Check your contacts periodically in the fuse box and at the pump connector (oxidation increases resistance).
If your Murano Z50 often stands outside in winter; before starting the engine in cold weather, it is recommended Turn the ignition on/off 2–3 timesso that the fuel pump has time to pump fuel into the line. This reduces the load on the electrical circuit.
Regular diagnostics of the fuel system (including checking fuel pressure) helps to avoid sudden breakdowns. Normal system pressure Murano Z50 — 3.5–4.0 bar.
FAQ: Frequently asked questions about the fuel pump fuse Nissan Murano Z50
Is it possible to drive with a blown fuel pump fuse?
No, this will result in the engine simply not starting. The fuel pump will not pump fuel into the line, and the injectors will not receive gasoline for injection. In rare cases, the engine may start with some fuel remaining in the line, but will immediately stall.
What fuse should I use instead of 15A if I don’t have one at hand?
None! Using a fuse of a different rating (eg 20A) may result in a fire. If you urgently need to get there, you can temporarily install a 10A fuse, but it can quickly burn out. It's better to find an original one for 15A.
Where to buy a fuse for a fuel pump Murano Z50?
A standard size fuse (mini blade) rated at 15A is sold at any auto store (costs ~20–50 rubles). Any quality brand will do, e.g. Hella, Bosch or Littlefuse. The main thing is that the denomination matches.
Why does the fuel pump fuse only blow when it rains?
Most likely there is a insulation breakdown, and moisture causes a short circuit. Often the problem lies in the fuel pump connector (under the back seat) or in the wiring under the car. You need to look for where the current flows to ground.
Can the fuel pump fuse blow due to bad fuel?
No, the fuse itself does not respond to fuel quality. However, bad gasoline can clog the fuel filter or increase the load on the pump, which in the long term will lead to its wear and increased current consumption. This may already cause the fuse to blow.