<em>Nissan Serena C23</em>Fuse Box: Complete Diagram, Location and Replacement Guide

Nissan Serena C23 is a popular minivan that has gained trust due to its reliability and practicality. However, even with such a proven model, electrical problems occasionally arise, and most often they are caused by blown fuses or faulty relays. If your headlights stop working, the heater refuses to turn on, or the audio system does not respond, the first thing you should check is fuse box.

In this guide we will take a closer look at where the fuse box is located in Serena C23, we will provide decoding the circuit indicating the purpose of each element, and also explain how to correctly diagnose and replace fuses without the risk of damaging the car’s electronics. Particular emphasis is placed on typical replacement errors that can lead to a short circuit or failure of the on-board computer.

Where is the fuse box located in Nissan Serena C23?

B Serena C23 installed two main fuse boxes:

• 🔧 Main unit — located in the cabin, under the instrument panel on the driver’s side. To access it, you need to open the cover, which is secured with two plastic latches.
• ⚡ Additional relay block — located in the engine compartment, next to the battery. It is responsible for high-voltage circuits (for example, cooling fan, starter).

It is important to note that in some modifications Serena C23 (for example, with a diesel engine YD22DDTi) may be present third block — it is located behind the glove compartment and is responsible for the turbine and fuel pump control circuits. If your car is equipped with a system Nissan Connect, the multimedia module fuse may also be located there.

To accurately identify a block, pay attention to its markings:

• 📌 FUSE BOX A — salon unit (main).
• 📌 RELAY BOX B — engine compartment relay block.
• 📌 FUSE BOX C — additional block (if available).

⚠️ Attention: Do not confuse the fuse box with body control module (BCM), which is located nearby, but has a different design. Attempting to remove fuses from the BCM may result in the immobilizer being reset!

Fuse box diagram Nissan Serena C23: destination decoding

Below is a table with full decoding of fuses main cabin unit (FUSE BOX A). The ratings (in amperes) and the circuits for which each element is responsible are indicated.

Fuse no.	Rating (A)	Purpose	Symptoms of a problem
1	10	Interior lighting, dashboard lighting	The lamps do not work, the button backlight does not light up
5	15	Audio system, navigation (Nissan Connect)	The radio does not turn on, there is no sound
10	20	Window lifters (all doors)	Glass does not move or operates jerkily
15	10	Engine control unit (ECU)	The engine stalls and lights up CHECK ENGINE
20	30	Heater fan (stove)	Warm/cold air does not blow

A complete diagram indicating all 30 fuses and the relay can be found in instruction manual your Serena C23 (section 8-30). If the documentation is lost, download it from the official website Nissan by car VIN code.

Particular attention should be paid to fuses №7 (15A) And №12 (10A) - they are responsible for immobilizer operation And central lock. Their burnout can block the engine from starting or access to the interior!

What should I do if the fuse blows again?

If the fuse blows again after replacement, this indicates short circuit in the chain. In this case it is necessary:

1. Disconnect the battery.

2. Test the circuit with a multimeter in resistance testing mode.

3. Inspect the wiring for melting or damaged insulation.

4. If a short circuit is detected, eliminate the cause (for example, replace the damaged section of the wire).

Don't ignore this problem: constant burnouts can lead to fire in electrical wiring!

How to check the fuse in Nissan Serena C23: step by step instructions

Diagnosing fuses does not require special skills, but it is important to follow the algorithm so as not to damage the contacts of the block. You will need:

• 🔦 Flashlight (for inspecting contacts).
• 🛠️ Tweezers or a special puller (usually included with the car).
• 🔋 Multimeter (optional, for accurate checking).

Step 1: Turn off the power.

Before removing fuses Be sure to remove the negative terminal from the battery. This will prevent short circuits if the contacts are accidentally connected.

Step 2: Find the faulty fuse.

Visually inspect the fuses: a blown one will have broken thread or melted body. If it is not possible to determine visually, use a multimeter in circuit test mode (200 Ω). Touch the fuse contacts with the probes - if the resistance tends to infinity, the element is faulty.

Disconnect the battery|Wear gloves (protection against static electricity)|Prepare spare fuses of the required rating|Check the lighting (when working in the dark)-->

Step 3: Replace the fuse.

Use only fuses of the same rating, which are original! Installing an element with a large ampere value may result in overheating of wiring. For example, if instead 10A put 15A, the risk of fire increases 2–3 times.

⚠️ Attention: Never use “bugs” (homemade jumpers made of wire or foil)! This may cause fire in the cabin or failure of the control unit (ECU).

Typical faults associated with fuses in Serena C23

Owners Nissan Serena C23 often encounter a number of “symptoms” indicating problems with the fuses. Here are the most common cases:

• 🔥 Headlights or tail lights do not work - check the fuses №3 (10A) And №4 (10A), as well as relay R1 in the engine compartment.
• 🚗 The engine does not start, the starter does not turn - the fuse is at fault №15 (10A) or starter relay (R5). Also check power fuse (usually 80A) in the engine compartment.
• 🎵 Audio system doesn't work - fuse №5 (15A) or №6 (10A) (for amplifier). If after replacing the radio does not turn on, check wiring to antenna connector — there is often a break there.
• 🔌 Cigarette lighter and 12V socket do not work - fuse №25 (20A). If it burns out repeatedly, inspect the connector for oxidation or short circuit.

The problem with central locking. If the doors do not lock with the remote control, but work with the key, the fuse is to blame №12 (10A) or relay R3. However, if the locks do not respond at all, the reason may lie in body control module (BCM) - in this case, diagnostics with a scanner will be required (for example, Launch X431).

How to avoid frequent fuses blowing?

If the fuses are in your Serena C23 burn out too often, this is a signal hidden electrical problems. Here are the main reasons and ways to eliminate them:

1. Short circuit in the circuit.
   

   The most common reason. Test the circuit with a multimeter to find the area with zero resistance. Wires passing through door thresholds — they fray from constant opening/closing.

2. Circuit overload.
   

   For example, if several powerful devices (compressor, refrigerator) are connected to the cigarette lighter, the fuse 20A may not stand it. The solution is to use splitter with its own fuse.

3. Bad contacts.
   

   Oxidation or corrosion in the fuse box leads to increased resistance and overheating. Clean your contacts special liquid (For example, CRC Contact Cleaner).

4. Poor quality fuses.
   

   Cheap Chinese analogues often have excessive resistance, which leads to their premature failure. Buy fuses from trusted brands: Bussmann, Littlefuse or original Nissan.

If you find that fuses are melting (melting marks are visible on the body), this is a sign serious overload. In this case, you need to check generator And battery - perhaps they produce too high a voltage (more 14.8V).

Replacing the relay in the fuse box: nuances for Serena C23

Relay in Nissan Serena C23 are responsible for controlling powerful consumers: starter, fans, headlights. Replacing them is somewhat more difficult than replacing fuses, but can also be done with your own hands.

How to identify a faulty relay?

A faulty relay may:

• 🔊 Click, but do not close the circuit (a sound is heard, but the device does not work).
• 🔥 Heat up (the body is hot to the touch).
• 🛑 Do not make any sounds when activated.

Step by step replacement:

1. Disconnect the battery.
2. Remove the relay with tweezers (do not pull on the wires!).
3. Install a new relay same type (note the markings: 12V 30A/40A etc.).
4. Check the functionality of the circuit.

B Serena C23 The most problematic are the relays:

• R1 - main relay (responsible for power supply ECU).
• R5 — starter relay (often “sticks” at low temperatures).
• R8 — cooling fan relay (if it fails, the engine overheats).

⚠️ Attention: Relay R1 (most importantly) if there is a malfunction, it can cause complete electronics failureincluding immobilizer. If after replacing it the car does not start, you will need ECU flashing in the service.

Where to buy fuses and relays for Nissan Serena C23?

You can purchase spare parts in several ways:

• 🏬 Official dealers Nissan — guarantee of original parts, but the price is 30–50% higher. The fuses are sold as a set (article no. 28510-4M000), relays - separately (for example, 25230-4M000 for starter relay).
• 🛒 Auto stores — Autodoc, Exist, Emmegi. Here you can find analogues from Hella, Valeo or Febi at a price 20–40% lower than the original.
• 🌍 Internet platforms — AliExpress (cheap options, but there is a high risk of running into a fake), Amazon, eBay (there are original parts from Europe).

When purchasing, pay attention to:

• 🔍 Denomination (for fuses) or switching current (for relays).
• 📏 Size - in Serena C23 fuses are used Mini Blade (small) and Regular Blade (standard).
• 🔧 Compatibility - some relays may look the same externally, but have different pinouts (for example, 12V And 24V).

To save time, you can order set of fuses and relays to all positions at once. For example, set Nissan 28510-4M00A includes all necessary elements for Serena C23 and costs about 1,500–2,000 rubles.

💡

Before purchasing a relay, remove the old one and compare its markings with the catalog. For example, relay R5 (starter) in Serena C23 must have a designation TYCO 1450215-2 or similar.

FAQ: Frequently asked questions about the fuse box Nissan Serena C23

Is it possible to use fuses of a higher rating if the original ones often blow out?

No! Installing an oversized fuse (e.g. 20A instead of 10A) can lead to overheating of wiring and even fire. If fuses blow frequently, look for the cause (short circuit, overload) and eliminate it, rather than mask it as a problem.

How to test a relay without a multimeter?

Can be used replacement method: Temporarily install a known working relay from another circuit (for example, a fan relay instead of a headlight relay). If the device works, the problem is in the relay. You can also shake the relay: if you hear a rattling sound inside, this is a sign of a breakdown.

What should I do if, after replacing the fuse, the devices still do not work?

Possible reasons:

1. Burnt out fuse in another circuit (for example, for ECU).
2. Faulty relay, which controls this circuit.
3. The problem is wiring (break or short circuit).
4. Out of order control unit (For example, BCM for body electronics).

In such cases it is recommended scanner diagnostics (For example, Launch CReader).

Where can I find a fuse box diagram if I don't have a manual?

The scheme can be:

• Download from the official website Nissan by VIN code.
• Find on thematic forums (for example, SerenaClub.ru or Drive2).
• Take a photo from the fuse box cover (the diagram is often marked there).

You can also request the diagram from the dealer by email.

Is it possible to clean fuse block contacts with WD-40?

No, WD-40 is not suitable for cleaning electrical contacts! It leaves an oil film, which over time attracts dust and impairs conductivity. Use special cleaners:

• CRC Contact Cleaner (article 05003).
• Liqui Moly Kontaktreiniger (article 7656).

After cleaning, wipe the contacts dry lint-free cloth.