Crossover electrical system Nissan Murano The first generation (Z50) is highly reliable, but like any complex car, it requires periodic attention from the owner. One of the most common problems that car owners face when one or another component fails is the burnout of the fuse link. An incorrect understanding of where the required security element is located can lead to wasted time and nerves.
Owners Nissan Murano Z50 you need to clearly know the location of the two main blocks: the cabin and the engine compartment. Each of them is responsible for their own groups of energy consumers. If your window regulator stops working or your heater fan does not turn on, the problem almost certainly lies in a burnt-out fuse, and not in the mechanism itself. It is important to be able to distinguish a visually burnt element from a serviceable one.
Location and purpose of protection blocks
On a crossover Nissan Murano The Z50 generation has a two-level protection system. The main unit, responsible for the high-voltage circuits of the engine and cooling system, is located in the engine compartment. Its body is made of durable plastic and is protected from moisture and dust by a special cover. Inside you will find massive relays and high rated fuses responsible for operation generator, starter and fuel injection systems.
The second unit, more compact, is located inside the car. It is hidden behind a decorative panel on the left side of the dashboard, next to the driver's door. This is where the elements that protect interior lighting, cigarette lighter, audio system and power windows. To access this unit, no special tools are required; you just need to remove the plastic plug by pulling it towards you.
It is worth noting that in some configurations there may be an additional relay unit responsible for air conditioner and heated seats. Its location may vary depending on the year of manufacture and market. However, the basic circuit remains unchanged: the main power circuits are under the hood, household circuits are in the cabin.
Diagnostics and visual inspection of fuses
Before you start replacing, you need to make sure that the problem is really in the fuse. Visual inspection is the fastest and most reliable inspection method. You need to carefully examine the transparent plastic insert on the element body. If the metal jumper inside is intact, then the fuse is working. If the jumper is torn or a dark carbon stain is visible at the rupture site, the element burned out and requires replacement.
Sometimes the problem is not visible to the naked eye, especially if the tear is microscopic or the case is slightly cloudy. In such cases, it is recommended to use a multimeter or test lamp. Set the device to test mode and touch the contact blades of the fuse with the probes. If the multimeter does not beep, the circuit is open and the element faulty.
Under no circumstances try to temporarily close the fuse contacts with a piece of foil or wire. This is a gross violation of safety regulations, which can lead to wiring fires or failure of expensive electronic control units. Electrical system Nissan Murano Z50 is very sensitive to current overloads.
⚠️ Attention: Never install a fuse with a higher rating than indicated in the diagram. Using a 20A element instead of a 10A element can cause the wiring to melt and cause a fire at the slightest overload.
- Cabin block (torpedo)
- Engine compartment (engine compartment)
- Both blocks cause difficulties
- I don't know where they are
Diagram and explanation of the main fuses
For correct diagnosis, you need to be guided by the labeling. There is often a diagram glued to the inside of the block covers, but it can come off or wear off over time. Below is a table with the most frequently burned out elements for the model Nissan Murano Z50.
| Number/Marking | Denomination (A) | Purpose |
|---|---|---|
| 1 (F1) | 10 | Engine control system (ECU) |
| 2 (F2) | 15 | Power windows (all doors) |
| 3 (F3) | 20 | Cigarette lighter and 12V socket |
| 4 (F4) | 30 | Heater fan (stove) |
| 5 (F5) | 10 | Tail lights and instrument lighting |
Particular attention should be paid to the cigarette lighter fuse, since powerful chargers or DVRs are often connected through it. If it doesn't work for you USB charging or cigarette lighter, first check the 20 Amp element. Also, the heater fan fuse often fails, which leads to a lack of windshield airflow, especially in the cold season.
In the engine compartment, the elements responsible for ignition system and fuel pump. If the car does not start, but the starter turns the engine, check these particular circuits. Do not forget that there are also relays in the engine compartment, which can stick or fail no less often than the fuse links themselves.
⚠️ Attention: Before removing the engine compartment cover, be sure to turn off the engine and turn off the ignition to avoid a short circuit if you accidentally touch the tool.
☑️ Checking fuses
Fuse replacement procedure
Replacing a security element is a simple procedure, but requires care. As a rule, the car comes with a special plastic clamp (tweezers), which is attached to the unit cover or stored next to it. Use this particular tool to avoid damaging the plastic fuse blades with metal tongs or pliers.
The sequence of actions is as follows: unclip the cover latches and remove it. Using tweezers, carefully remove the suspicious element. Inspect it for defects. If the fuse is blown, take a new element of exactly the same rating and color. The color coding is standardized: yellow - 20A, blue - 15A, red - 10A.
Insert the new fuse until it clicks, making sure it is seated tightly. Close the lid and check the functionality of the device. If the fuse burns out immediately after replacement, it means there is short circuit, and further attempts to launch may lead to serious consequences. In this case, you need to contact an auto electrician.
What to do if you don’t have a fuse of the required rating at hand?
In an emergency, you can temporarily use a smaller fuse, but the device may not operate correctly. The use of a higher denomination is strictly prohibited. It is better to drive to a parts store using a spare part from a less important circuit (for example, from a radio circuit), but only if it is safe to drive.
Just replacing it is half the battle. If you connected a heavy load that exceeded the circuit limit, the problem will return. Analyze which devices were turned on at the time of the burnout.
Features of electrical equipment Nissan Murano Z50
Car Nissan Murano The Z50 has a number of design features that affect electrical performance. For example, a control system electric windows Has anti-pinch function. If the fuse on this circuit is blown, the system may “remember” the error and not work even after replacing the element until the adaptations are reset.
It is also worth noting the high load on the chain air conditioner. During the hot season, the compressor operates almost continuously, creating peak currents. This often leads to blown fuses with a rating of 15-20 Amps, which are responsible for controlling the compressor relay. If the air conditioner stops blowing cold air, check this particular circuit.
Keep a bag of spare fuses in the glove compartment. Nissan owners often lose tweezers, so it's helpful to have a universal set of tweezers on hand from your auto parts store.
Problems with electric mirror or heated seats on high-mileage models are often associated not with the fuse, but with oxidation of the contacts in the connectors. Before replacing the element, check the reliability of the contacts in the block. Oxidation can create high resistance, which the multimeter may not show as a short circuit, but the circuit will become unstable under load.
⚠️ Attention: When replacing fuses in the engine compartment, be extremely careful with the adjacent battery terminals. Shorting the tool to the positive terminal can cause arcing and damage to the wiring.
Regularly checking the condition of the contacts in the fuse box and cleaning them from oxidation will extend the life of the electrical equipment of the Nissan Murano Z50 and prevent false alarms.
Finding hidden faults and relays
Sometimes the problem lies not in the fuse element itself, but in the relay that controls this circuit. A relay is an electromechanical switch that can stick or fail. If you replace the fuse and it blows again, check the relay nearby. In the Nissan Murano Z50, the relays are often located in the same block as the fuses.
To test the relay, you can use the permutation method. Find a relay in the block that performs a similar function (for example, the radiator fan relay and the heater fan relay are often the same). Swap them. If the problem has moved (the heater fan has stopped working, but the radiator is working), then the relay is to blame.
It is also worth paying attention to the condition masses car. Poor ground connections can cause voltage surges that cause fuses to blow in the most unexpected places. Check the bolts securing the ground to the body and engine, clean them from corrosion and tighten them to the recommended torque.
How to test a relay without a multimeter?
Listen for the click of the relay when the ignition is turned on or the device is turned on. The absence of a click may indicate a faulty relay coil or a lack of control signal. Vibrating the relay when tapped can temporarily restore contact if the problem is mechanical sticking.
Prevention and Maintenance
To avoid frequent blown fuses, carry out periodic maintenance. Inspect the blocks once a year for moisture, oxidation and overheating. Be careful not to let any foreign objects enter the cigarette lighter, especially metal coins or paper clips, which may cause an instant short circuit.
If you install additional equipment (parking sensors, heaters, subwoofers), be sure to connect it through separate fuses and relays, and not “into the gap” of the standard wiring. Overloading of standard circuits is the most common cause of electrical failure on Nissan Murano with mileage.
Remember that electrics are the circulatory system of a car. Not only comfort, but also traffic safety depends on its serviceability. Competent maintenance and knowledge of the location of protection elements will help you quickly solve the problem on the road without a visit to the service center.
Where exactly is the interior fuse box located in the Nissan Murano Z50?
The interior unit is located on the left side of the dashboard, next to the driver's door. To gain access, you need to open the plastic panel that covers the unit. It is fixed with plastic latches and removed with a slight tug.
What should I do if the fuse burns out immediately after replacement?
If the new fuse blows instantly, this indicates a short circuit in the circuit. Don't keep changing them. You need to find the location of the short circuit by checking the wiring for damage, or contact an auto electrician for diagnosis.
Is it possible to use a fuse with a higher rating if the required one is not at hand?
Absolutely not. Using a fuse with a higher rating (for example, 25A instead of 15A) can lead to overheating and fire of the wiring, since the protection will trip too late. It is better to use an element of a lower value temporarily.
How to check a fuse without a multimeter?
Visual inspection through a transparent housing is the main method. If the jumper inside is broken or blackened, the fuse has blown. You can also try turning on the device; if it clearly does not work even though the fuse is working, the problem may be in the device itself.
Where can I find a replacement fuse in a Nissan Murano Z50?
A spare set of fuses is usually located in a block under the hood or in a special compartment inside the cabin unit. Also, tweezers for extraction are often attached to the cover of the engine compartment. Carefully inspect the inside of the covers.