Fuse box Nissan Terrano 2 (R20): diagram, location and replacement

Electrical system Nissan Terrano 2 (internal designation R20) is a complex assembly where each fuse is responsible for a specific circuit: from lighting to on-board computers. If your car's headlights, power windows or multimedia system stop working, the first check is fuse box. But where is it? How to properly maintain it? And why do some fuses blow over and over again?

In this article you will find complete decoding of fuse and relay blocks for all modifications of Terrano 2 (2014–2022), including diesel and petrol versions. We'll look at common replacement mistakes, show you how to read schematics, and give recommendations for diagnosing electrical faults. Without water - only specific instructions and verified data.

Where is the fuse box located in Nissan Terrano 2?

B Terrano 2 provided two main fuse boxes:

• 🔧 Main unit — located in the cabin, under the instrument panel on the driver’s side. To gain access, open the door, remove the plastic cover (it is secured with latches) and move the seat back.
• ⚡ Additional block — located in the engine compartment, next to the battery. It is protected by a plastic casing, which is removed after the latches are snapped off.

On some modifications (for example, with an engine MR20DD) a third may be present, small relay block, hidden behind the glove compartment. Its purpose is to control climate control and audio system circuits. If your air conditioner or radio does not work, check this particular unit.

⚠️ Attention: On market versions Russia/CIS And Europe The location of the blocks may vary slightly. For example, in European configurations, the additional unit is often moved closer to the ECU mounting block.

Diagram and decoding of the cabin unit fuses

The salon unit contains up to 40 fuses and relaysresponsible for the majority of consumers. Below is the current diagram for the models 2017–2022 (there may be minor differences for earlier versions).

Fuse no.	Denomination (A)	Purpose	Notes
F1	10	Engine control system (ECU)	Errors may occur during burnout P0600 or P0606
F7	15	Cigarette lighter, 12V socket	Lights up frequently when using powerful devices (such as compressors)
F12	20	Window lifters (all 4 doors)	If it burns out frequently, check the motors for jamming
F23	10	Dashboard lighting	Connected to relay K9 (lighting)
F30	30	Heater fan	If it burns out, check the motor resistance (normal: 0.5–1.0 Ohm)

The complete diagram with photos can be downloaded here (PDF, 2.4 MB). Please note: on versions with automatic transmission (For example, RE0F10D) added fuses F18 (10A) And F19 (15A), responsible for automatic transmission solenoids.

How to check a fuse without a tester?

Turn on the circuit (such as the headlights) and remove the fuses one by one. If the lamp goes out when you remove one of them, it is working. If the light does not change, the fuse has blown or the problem is in another part of the circuit.

Decoding fuses and relays in the engine compartment

Engine compartment block Terrano 2 contains high current relays and fusesresponsible for:

• 🔥 Starter and generator
• 💡 Headlights (low/high beam, PTF)
• ⚡ Electric cooling fans
• 🔋 Battery charging circuits

Pay special attention to the relay K5 (cooling fan) - its malfunction leads to engine overheating. If the relay clicks but the fan does not turn on, check:

1. fuse F35 (40A).
2. The condition of the connectors on the fan itself (oxidation is a common problem).
3. Signal from the ECU (the fan connector should be 12V when turned on).

Designation	Type	Purpose	Symptoms of malfunction
K1	Relay	Main relay (ECU)	Engine does not start, no spark
F40	Fuse (60A)	Generator	The battery does not charge, the lamp is on CHARGE
K7	Relay	Low beam (left headlight)	One headlight does not work, the relay clicks
F45	Fuse (30A)	ABS/ESP	The lamp is on ABS, errors C1130 or U1000

⚠️ Attention: fuse F40 (60A) - critical. Its burnout is often disguised as a generator malfunction. Before replacing, check the voltage at the battery terminals with the engine running (normal: 13.8–14.4V). If it is lower, the problem is in the generator, not the fuse.

How to properly replace a fuse or relay?

Replacing the fuse in Nissan Terrano 2 It seems simple, but there are nuances that even experienced drivers miss. Here are the step-by-step instructions:

1. Turn off the power. Remove the battery terminal (negative) or turn off the ignition. This will prevent short circuit.
2. Use tweezers. There is a special plastic tweezer (usually red) in the fuse box. Do not try to remove the fuse with your fingers or metal tools!
3. Check the denomination. The new fuse must have same ampere, just like the old one. Installing a fuse with a higher rating will lead to melting of the wiring.
4. Inspect the nests. If the contacts are oxidized or burnt, clean them with fine sandpaper (P1200).

For relays the process is similar, but there is an important difference: relays must be identical in markings. For example, fan relay (K5) and starter relay (K1) are similar in appearance, but have different response characteristics. Installing an inappropriate relay will lead to its rapid failure.

⚠️ Attention: If a new fuse burns out immediately after installation, there is short circuit. Don't continue experimenting! Have an electrician diagnose the wiring.

Typical faults and their causes

Owners Terrano 2 often encounter recurring problems related to the fuse box. Here are the most common:

• 🔄 Frequently blown cigarette lighter fuse (F7). Reason: use of devices with consumption >10A (for example, car refrigerators). Solution: Install a power strip with a separate fuse.
• 💡 Headlights do not work (fuses F25/F26 intact). Reason: oxidation of contacts in the block or relay malfunction K7/K8. Solution: Clean the contacts with alcohol.
• 🚗 Engine won't start, fuse F1 burned out. Cause: short circuit in the ECU wiring harness or a malfunction of the unit itself. Solution: diagnostics with a scanner (for example, Launch X431).
• 🔊 The audio system does not work. Reason: fuse F15 (10A) or relay K12. Also check the antenna amplifier (often fails on versions with Bose).

The problem with electrical package (window lifters, mirrors). If the fuse F12 burns out regularly, check:

• Condition of wiring in doorways (insulation chafing).
• Window lifter motors (when jammed, they consume current >20A).
• Comfort control unit (located under the driver's seat).

Diagnosing faults using a multimeter

For accurate circuit diagnostics Terrano 2 You will need a multimeter (for example, Mastech MS8230E). Here's how to use it:

1. Checking the fuse:
   • Set the multimeter to calls (diode icon).
   • Touch the fuse terminals with the probes. If you hear a beep, the fuse is good.
2. Checking the voltage in the circuit:
   • Turn on the circuit (eg headlights).
   • Measure the voltage at the fuse terminals. Must be 12V (or 5V for ECU circuits).
3. Relay test:
   • Connect the multimeter to the terminals 85 And 86 (relay coil). There must be resistance 50–120 Ohm.
   • Serve 12V to these conclusions you should hear a click.

If the multimeter shows 0V on the fuse input, the problem is in the wiring or switch. For example, for a headlight chain, check:

Путь сигнала: Аккумулятор → Предохранитель F25 → Реле K7 → Переключатель света → Лампа

⚠️ Attention: When diagnosing circuits ABS or ESP disconnect the battery! The voltage in these systems can reach 40V, which is dangerous for the multimeter.

Frequently asked questions (FAQ)

Can fuses of a different rating be used?

No! Installing a fuse with a large amperage (for example, 20A instead of 10A) will lead to melting of the wiring. If a fuse frequently blows, look for the cause (short circuit or overload), rather than increasing its rating.

Where can I find a fuse box diagram for a 2023 Terrano 2?

For restyled versions (2023+), the scheme may differ. Official documentation can be downloaded from the website Nissan Russia (section "Technical documentation") or in the appendix NissanConnect. Schemes are also posted on forums, for example, Terrano-Club.

Why does it blow again after replacing the cigarette lighter fuse?

Reasons:

1. Use of devices with consumption >10A (for example, 15A compressors).
2. Short circuit in the cigarette lighter socket (check for metal objects).
3. Malfunction of the 12V socket (chaining of wires behind the panel).

Solution: Install a power strip with a separate fuse or use an outlet in the trunk (if available).

How do I remove the fuse box to clean the contacts?

Instructions:

1. Disconnect the battery.
2. Remove the unit cover (it is secured with 4 latches).
3. Unscrew 2 bolts T20 (at the bottom of the block).
4. Gently pull the unit towards you, disconnecting the connectors.

To clean contacts, use WD-40 and a brush with soft bristles. After cleaning, dry the unit with a hairdryer.

Which fuses are responsible for climate control?

The following are responsible for the operation of climate control:

• fuse F16 (10A) — control unit.
• fuse F30 (30A) — heater fan.
• Relay K10 - air conditioning compressor.

If only the air conditioner does not work, also check the freon pressure (normal: 2.5–3.5 bar at 20°C).