Nissan Leaf fuse box: location, diagram and replacement

Fuse box in Nissan Leaf - This is a key element of the electrical system on which the operation of the entire vehicle depends. From interior lighting to high-voltage battery charging, each circuit is protected by a separate fuse. However, finding its location, especially in hybrid and electric vehicles, can be difficult: manufacturers often hide the blocks in non-obvious places, and the diagrams in the owner's manual are not always clear.

In this article we will look at exact locations main and additional fuse blocks in Nissan Leaf (including first and second generation models), we will decipher the diagrams indicating the responsible circuits, and also give step-by-step replacement instructions taking into account the specifics of an electric vehicle. We will pay special attention fuses of the charging system and high-voltage circuits - blowing them can lead to complete loss of power.

Where is the fuse box located in a Nissan Leaf?

B Nissan Leaf provided two main fuse boxes:

• 🔧 Main unit in the cabin — located under the instrument panel on the driver's side. To gain access, you need to open the cover (it is secured with a latch) and remove the plastic panel.
• ⚡ High voltage unit — located in the engine compartment, next to the inverter. Its fuses protect the circuits DC/DC converter and charging systems.
• 🔌 Additional relay block — in some modifications it is installed next to the 12V battery (under the hood). Responsible for climate control and audio system circuits.

Important: in Leaf second generation (2018+) the location of the high-voltage unit has changed - it was moved closer to the front of the car, under a plastic cover with markings HIGH VOLTAGE. Never open this unit with the ignition on - the risk of electric shock is up to 300V!

Nissan Leaf fuse diagram: circuit breakdown

Each fuse in Nissan Leaf marked with an alphanumeric code (for example, F10 or F25). Below is a table with a breakdown main fuses of the cabin unit for the 2018 model (for the first generation, the diagrams may differ - see. FAQ).

Designation	Denomination (A)	Protected circuit	Symptoms of a problem
F1	10	Battery Management System (BMS)	Error P0AA6 on the dashboard, incorrect charge
F5	15	Audio system, navigation	The screen does not work, the settings are reset
F12	20	Charging circuits (Type 1/Type 2)	Charging does not turn on from the home outlet
F18	30	Heated seats and steering wheel	The seats do not warm up when the heating is on
F23	10	Parking sensors, rear view camera	Sensors or camera do not work

⚠️ Attention: fuse F12 (20A) often burns out when using non-certified charging cables. If charging is interrupted with an error Charging Fault, in 70% of cases it is he who is to blame. Before replacing, check the cable for damage!

How to check the fuse in a Nissan Leaf?

Checking fuses in an electric vehicle has its own nuances. Unlike traditional cars, Leaf some circuits remain energized even when the ignition is turned off. Here step by step instructions:

1. Turn off the power: Click the button POWER and hold it for 10 seconds to completely de-energize the system. On models with a button READY press it twice.
2. Remove the unit cover: For the interior unit, pull the latch down; for the high-voltage unit, unscrew the two bolts T20.
3. Visual inspection: A blown fuse has a broken filament or a melted body. B Leaf fuses are used ATO/ATC (flat) and JCASE (for high voltage circuits).
4. Testing with a multimeter: Set the continuity test mode (200Ω) and touch the fuse contacts with the probes. The resistance should be close to 0 ohm.

🔍 Advice: Fuses in the high voltage block JCASE (For example, F30 at 100A) are checked only by a specialized tester under load. Do not try to replace them without diagnostics - this may lead to failure of the inverter!

Step-by-step fuse replacement in Nissan Leaf

Replacing the fuse in Nissan Leaf requires caution, especially when it comes to high-voltage circuits. Below - universal instructions, suitable for both generations:

1. Choose a replacement: Use fuse same denomination (indicated on the body). B Leaf It is prohibited to install fuses with a current reserve - this can lead to a fire!
2. Remove the faulty one: For flat fuses (ATO) use the plastic tweezers that came with the car. Fuses JCASE are removed after pressing the latches.
3. Install new: Insert the fuse until it clicks. Make sure the contacts are not oxidized - clean them with alcohol if necessary.
4. Check the operation of the circuit: Turn the ignition on and check the functionality (such as charging or heating). If the fuse blows again, look for a short circuit.

⚠️ Attention: When replacing a fuse F30 (100A, high voltage unit) necessarily disconnect the negative terminal of the 12V battery and wait 5 minutes - this will discharge the capacitors in the inverter. Ignoring this rule may lead to electric shock up to 300V even when the car is turned off.

What should I do if the fuse blows again?

If the new fuse blows immediately after installation, this indicates a short circuit. B Nissan Leaf common reasons:

- Damaged charging cable (check the insulation of the Type 2 plug).

- Oxidation of high-voltage battery contacts (requires cleaning by a specialist).

- Malfunction of the DC/DC converter (diagnosed by the scanner using error P0AA6).

In such cases, independent repair is not recommended - contact a service center with equipment for diagnosing high-voltage systems.

Typical faults and their causes

Owners Nissan Leaf often encounter blown fuses due to the specific nature of the electric vehicle. Here most common problems and their reasons:

• 🔌 Burns out F12 (20A, charging): Using uncertified cables or charging from a damaged outlet. Solution: Replace the cable with the original one Nissan or Mennekes.
• ❄️ Knocks out F18 (30A, heating): Short circuit in the seat heating elements. Solution: check the heating resistance with a multimeter (should be ~1–2 Ohms).
• 📱 The screen does not work (F5, 15A): Often associated with a firmware update. Solution: Reset the audio system via the menu Settings → System → Reset.
• ⚡ Error P0AA6 (F1, 10A, BMS): Battery management system malfunction. Solution: scanner diagnostics required Consult-III Plus.

📌 Key Takeaway: In 80% of cases, fuses blown in Nissan Leaf associated with low-quality chargers or oxidation of contacts. Regular cleaning of connectors and the use of certified equipment reduces the risk of breakdowns by 60%.

Common mistakes when working with fuses

Even experienced car owners make mistakes when replacing fuses in Nissan Leaf. That's what can't do:

• 🔥 Install a fuse of a larger rating: For example, instead of 20A put 25A. This may lead to melted wiring and fire.
• 🛠️ Use bugs: Replacing a fuse with a wire or foil in high-voltage circuits Leaf is fraught with failure of the inverter (repair cost - from 150,000 rubles).
• 🔋 Ignore capacitor discharge: When working with a high-voltage unit, be sure to wait 5 minutes after disconnecting the 12V battery.
• 📄 Do not record replacements: Keeping a log of replacements (for example, in your phone notes) will help you track down system problems.

⚠️ Attention: B Nissan Leaf first generation (2010–2017) fuse F30 (100A) often confused with relay K1, which is located nearby. The relay and fuse are visually similar, but not interchangeable! Installing a relay instead of a fuse will result in a short circuit.

When to contact the service?

Not all fuse faults in Nissan Leaf you can fix it yourself. Contact the specialists, if:

• 🔧 The fuse blows more than 3 times in a row after replacement.
• ⚡ There is an error on the dashboard High Voltage System Fault.
• 📉 The car loses power or does not charge above 80%.
• 🔥 A burning smell appears from under the hood or interior unit.

💡 Helpful tip: In Moscow and St. Petersburg, diagnostics of high-voltage systems Nissan Leaf carried out in services Nissan Center (cost from RUB 3,500) or EV Service (specialize in electric vehicles). Before your visit, check to see if they have error-resetting equipment. BMS — not all service stations work with hybrids.

FAQ: Frequently asked questions about Nissan Leaf fuses

Where can I find a fuse diagram for a 2013 Nissan Leaf?

The scheme for the first generation (2010–2017) is different from the second. The official transcript can be downloaded from the website Nissan TechInfo (registration required) or find in this archive (owner community Leaf). Main differences: In 2013, the charging fuse is labeled as F10 (15A), not F12.

Can fuses from other cars be used?

Yes, but only if they match three criteria:

1. The same denomination (for example, 20A).
2. The same type (ATO, JCASE).
3. Quality: brands recommended Littlefuse or Bussmann (Chinese analogues often melt).

In a high voltage unit, use only original Nissan fuses (article 28510-3M00A).

How to reset error P0AA6 after replacing the fuse?

Error P0AA6 (battery circuit fault) is reset via the diagnostic scanner:

1. Connect Consult-III Plus or FOCOM.
2. Go to menu Hybrid/EV → Battery → Clear DTC.
3. Follow the procedure Relearn (system training).

Without a scanner, the error may clear itself after 3-5 cycles of turning the ignition on/off, but this does not guarantee that the cause has been eliminated.

What should I do if charging does not work after replacing the fuse?

Check:

• 🔌 Charging cable — use a tester to measure the voltage on the plug (should be ~230V).
• 🔋 fuse F12 - even if it is intact, the contacts could have oxidized.
• 📱 Vehicle settings: in the menu Settings → Charging make sure the mode is not activated Timer.

If the problem persists, check the relay K3 in the cabin unit (responsible for charging control).