Electrical system of a modern crossover Nissan Murano is a complex network where each node performs its own function. When one of the components fails, the problem often lies not in the device itself, but in the protective element of the circuit - the fuse. Understanding how it works fuse box, allows the owner to quickly localize the fault and save time on a visit to the service center.
Owners Nissan Murano the second and third generations are faced with two main locations of protective elements. One block is located in the engine compartment, protecting power units and engine systems, and the second is located in the cabin, responsible for comfort and multimedia. Incorrect diagnosis can lead to replacement of serviceable parts, so it is important to know the exact distribution pattern.
Many car owners mistakenly believe that a blown fuse is an accident. In fact, this is an indicator indicating that the permissible current in the circuit has been exceeded. Before simply replacing the part with a new one, you need to figure out why the failure occurred, otherwise the problem will recur in a short time and can lead to more serious consequences for the wiring.
Location and structure of the engine compartment
Main distribution board in the crossover Nissan Murano It is located under the hood, on the right side (if you look in the direction of travel), next to the battery. This unit is responsible for powering critical systems: generator, starter, cooling system and engine control units. The cover of the unit is made of durable plastic and is closed with special latches, which must be carefully snapped off if you need access to the insides.
Inside the engine compartment you will find not only standard fuse links (fuses), but also powerful relays, as well as so-called fusible link elements that can withstand high currents. It is important to note that some contacts may be difficult to access due to protective caps or adjacent hoses. Before starting work, be sure to let the engine cool down to avoid burns from accidentally touching hot surfaces.
- 🔧 Be sure to use a dielectric tool for work to avoid short circuit.
- 🔍 Inspect the contacts for traces of oxidation or melting of the plastic.
- ⚡ All relays are color coded according to their purpose in the circuit.
Particular attention should be paid main fuse, which often takes the form of a thick rod or wide bar. Replacing it requires special care and the availability of a specific tool, since it is designed for enormous current. If this element burns out, this almost always indicates a serious accident in the vehicle's electrical network.
⚠️ Attention: Before opening the engine compartment cover, be sure to disconnect the negative terminal of the battery to eliminate the risk of a short circuit if metal tools accidentally touch live parts.
Interior fuse box and its features
Second fuse box in Nissan Murano located directly in the cabin, usually to the left of the steering wheel, behind a special decorative panel. To access it, you need to pull the panel towards you or unscrew several screws, depending on the generation of the car. This is where the elements responsible for the operation of the cigarette lighter, power windows, audio system and air conditioning system are located.
The arrangement of elements in the cabin block is denser than in the engine compartment, which sometimes makes it difficult to find the right fuse. Each element is color coded to indicate the current rating: yellow - 5A, red - 10A, blue - 15A, green - 30A, and so on. Using a fuse with the wrong rating is strictly prohibited, as this may cause the wiring to melt.
- 🚗 When checking the cigarette lighter, first look at the fuse marked "CIG" or "PWR OUTLET".
- 🔦 Interior lighting and instrument lighting are often protected by a separate fuse in this unit.
- 💡 If the central locking stops working, check the relay located at the bottom of the interior unit.
In some trim levels Nissan Murano An additional block with a relay is also hidden under the plastic panel, which is responsible for the operation of the heater fan and power windows. Sometimes it is the failure of the relay, rather than the fuse, that causes systems to fail. Visually, the relay is easy to distinguish by its larger dimensions and square shape.
- Cigarette lighter
- Window lifters
- Audio system
- Interior lighting
For ease of search, the manufacturer often places it on the inside of the block cover distribution scheme. However, it is worth remembering that during use the sticker may come off or wear off. In such cases, it is best to have an official owner's manual or printed diagram that matches your VIN on hand.
⚠️ Attention: Never use twisted wire or a piece of foil to replace a fuse. This will instantly lead to a fire in the wiring at the first overload of the circuit.
Scheme and decoding of symbols
Understanding fuse diagrams - the key to quick diagnosis. The table below shows the main elements that most often raise questions among owners Nissan Murano. Please note that the numbering may vary slightly depending on the year of manufacture and vehicle equipment.
| Number/Marking | Purpose | Denomination (A) | Localization |
|---|---|---|---|
| F1 / CIG | Cigarette lighter and socket | 15 | Salon |
| F10 / RDM | Wiper relay | 10 | Salon |
| F25 / A/C | Air conditioning compressor | 20 | Salon |
| F35 / ENG | Engine control unit | 10 | Under the hood |
| F40 / HORN | Klaxon | 15 | Under the hood |
When reading a diagram, it is important to pay attention not only to the digital designations, but also to the letter indices, which often indicate a specific subsystem. For example, "IG" usually refers to the ignition and "ACC" to accessories that operate when the engine is off. If you see a burnt element with a marking that is not on your chart, it is likely an option specific to your market.
Sometimes the problem lies not in the fuse itself, but in the contact group. Over time, under the influence of vibration and temperature changes, the contacts can oxidize or come off. Visually, this manifests itself in the form of a dark coating or carbon deposits on the plastic fuse housing or in the mounting socket. In such cases, replacing the element may not help without first cleaning the contacts.
What to do if there is no diagram?
If the sticker on the block cover has worn off, try to find the official diagram on the Internet by searching for “Nissan Murano [year] fuse box diagram.” You can also contact an authorized dealer with the vehicle's VIN to obtain accurate documentation.
To accurately determine the rating, use a multimeter or visual inspection of the fuse link. A blown fuse has a broken metal bridge inside a transparent housing. If you doubt the serviceability of an element, it is best to test it for resistance to exclude a false alarm.
Rules for safe replacement of fuses
Replacement process fuse It seems simple, but requires compliance with certain safety regulations. Never make a replacement with the car running, even if the ignition is turned off. Some circuits have constant voltage, and accidentally shorting tools can cause arcing or electric shock.
Included with the car Nissan Murano Usually there is a special plastic clamp (tweezers) for removing fuses. It is often attached to the block cover or located in a special pocket in the cabin. The use of this tool is preferable as it provides a secure grip and eliminates the risk of slipping.
- 🛠️ Always use only original or high-quality analogues with exactly the same denomination.
- 🔋 Before replacing, make sure the ignition key is in the OFF position.
- 👀 Inspect the new fuse before installation for any manufacturing defects.
☑️ Replacement procedure
If after replacing the fuse it blows again within a few seconds, this is a sure sign of a short circuit in the circuit. In this case, further attempts to replace the element yourself are useless and dangerous. It is necessary to immediately stop operation and contact an auto electrician to find the location of the short circuit.
Some modern models Nissan Murano equipped with intelligent protection systems that can block the circuit even after replacing the fuse. In such cases, you may need to reset the error through a diagnostic scanner or disconnect the battery for a few minutes to reboot the system.
Keep several spare fuses of different ratings in the glove compartment. This will save you time and nerves if the device stops working on the road.
Frequent malfunctions and their causes
The most common problem is a blown cigarette lighter fuse. This occurs due to the use of low-quality chargers that draw current in excess of the circuit rating. Also, the reason may lie in a short circuit inside the adapter itself connected to the outlet.
Another common malfunction is the failure of the power windows or central locking. This is often due to wear and tear on the drive motor, which begins to draw more current than it should, causing the fuse to blow. In this case, replacing the fuse will only give a temporary effect.
In winter, owners Nissan Murano may experience failure of the heated seats or rear window. This is because heating elements lose their insulation over time, causing current to leak. The cause may also be oxidation of contacts in connectors due to moisture ingress.
If the fuse blows again immediately after replacement, this is not an accident, but a signal of a serious malfunction in the circuit that requires professional diagnosis.
⚠️ Warning: Do not ignore the burning smell or smoke coming from the fuse box. These are signs of irreversible wiring damage that could cause a vehicle fire.
Diagnostics using a multimeter
To accurately check the functionality of the fuse without removing it, you can use a multimeter. Set the device to resistance measurement mode or “continuity” mode. Apply test leads to the metal contacts on top of the fuse. If the device beeps or shows zero resistance, the fuse is good.
If you cannot remove the fuse, you can check for voltage at its contacts. Ground one multimeter probe to the car body, and alternately touch the fuse contacts with the other. When the ignition is turned on, a voltage of 12V should be present at one of the contacts.
This method is especially useful for testing relays and power components that are difficult to remove without special tools. However, remember that working with a multimeter under voltage requires caution and appropriate skills.
FAQ: Answers to popular questions
Where is the main fuse box located in the Nissan Murano Z51?
In the Z51 model (first generation), the main unit is located under the hood on the right, and the interior unit is located to the left of the steering wheel behind the panel. In the Z52 and Z53 models, the location is similar, but the interior unit can be hidden under the side sill trim.
What should I do if the cigarette lighter fuse keeps blowing?
This indicates a short circuit in the outlet or connected device. Try turning off all gadgets and replacing the fuse. If it burns out again, you need to check the outlet for shorted contacts inside or to the housing.
Can I use a lower rated fuse?
Technically it is possible, but this will lead to its rapid burnout under normal load. This will not protect the chain, but will only create inconvenience. Always use the denomination shown in the diagram.
How to determine which fuse is responsible for a particular device?
Refer to the diagram on the unit cover or the instruction manual. If there is no diagram, you can check the fuses sequentially, observing the devices turn off, but it is better to use a multimeter to check the circuit.