Nissan Almera Classic (body N16) is a reliable car, but even it is not immune to electrical problems. One of the most common malfunctions is failure fuel pump relaywhich leads to failure to start the engine or unstable operation. In this article we will look at where the fuel pump relay is located on Almere Classic, how to check it with a multimeter, what symptoms indicate a breakdown and how to replace it yourself - without contacting service.
Feature Almera Classic is that the fuel pump relay is combined with fuse box inside the cabin, and its malfunction is often disguised as problems with the pump itself or the fuel system. We have collected all the relevant information: from original relay articles (25230-4M000 or 25230-4M010) to step-by-step instructions with photos so that you can quickly diagnose and fix the problem.
Where is the fuel pump relay located on Nissan Almera Classic?
B Nissan Almera Classic (2006–2012) the fuel pump relay is located in fuse and relay mounting block, which is located inside the car - under the dashboard on the driver's side. To access it:
- Open the driver's door and sit in the seat.
- Under the steering column, find the plastic fuse box cover (it is secured with latches).
- Carefully pry the cover with a screwdriver or flat object and remove it.
The fuel pump relay in the block is designated as Fuel Pump Relay or is marked «R18» (on some versions - “R16”). It is installed next to the fuel pump fuse (15A, denoted as Fuel Pump). For clarity, the layout is shown below:
| element | Designation | Denomination/Article |
|---|---|---|
| Fuel pump relay | R18 (or R16) | 25230-4M000 / 25230-4M010 |
| Fuel pump fuse | Fuel Pump | 15A |
| Cooling fan relay | R17 | — |
| Main relay (ECU) | R15 | — |
⚠️ Attention: On some modifications Almera Classic (for example, with an engine QG16DE) the relay may have a different designation. Always refer to the diagram on the back of the fuse box cover!
- In the interior fuse box
- In the engine compartment
- I don't know, I didn't look
- Another option
Symptoms of a faulty fuel pump relay
Fuel pump relay Nissan Almera Classic fails gradually or suddenly. The main symptoms indicating its malfunction:
- 🔴 The engine does not start, but the starter turns. At the same time, there is no characteristic buzzing of the fuel pump when the ignition is turned on.
- 🟡 The engine stalls while driving, then starts only after several attempts.
- 🟠 Unstable engine operation at idle (speeds float, “triple”).
- 🔵 Loss of power during acceleration, “failures” when pressing the gas pedal.
- 🟣 Clicking noises from the fuse box when turning the ignition key (indicates “sticking” of the relay contacts).
It is important to distinguish a relay failure from a failure of the relay itself. fuel pump or fuse. For example, if when you turn on the ignition the pump does not buzz, but the relay clicks, the problem may be in the pump or a broken wiring. If the relay does not click at all, it is faulty or there is no power supplied to it.
💡 Helpful tip: Before replacing the relay, check fuel pump fuse (15A). It is located next to the relay and often burns out during power surges or a short circuit in the circuit.
If the engine does not start and the relay clicks, try lightly tapping the relay body with a screwdriver - sometimes this temporarily restores contact.
How to check the fuel pump relay with a multimeter?
To diagnose the fuel pump relay on Almera Classic will be needed multimeter (or control lamp) and a screwdriver. The check is performed in two stages: winding continuity And contact test.
Step 1: Checking the Relay Coil
Switch the multimeter to resistance measurement mode (200 Ohm). Connect the probes to the terminals 85 And 86 (usually these are relay control contacts). Normal winding resistance - 50–120 Ohm. If the device shows 0 (short circuit) or ∞ (break), the relay is faulty.
Step 2: Checking the functionality of the contacts
Connect the multimeter in mode DC 20V to conclusions 30 (food) and 87 (load). Serve +12V to contacts 85 And 86 (can be from a battery through a light bulb). A working relay should click, and show the multimeter 12V between 30 And 87. If there is no voltage, the contacts are burnt.
⚠️ Attention: Do not apply voltage to the relay for more than 5 seconds without a load (fuel pump) - this can lead to melting of the contacts!
☑️ Fuel pump relay diagnostics
Step-by-step instructions for replacing the fuel pump relay
Replacing the relay with Nissan Almera Classic takes no more than 5 minutes. You will need:
- New relay (original
25230-4M000or equivalent Bosch 0 332 019 150). - Flathead screwdriver or tweezers to remove the relay.
Sequence of actions:
- Disable battery weight (disconnect the negative terminal).
- Remove the fuse box cover under the steering wheel.
- Find the relay marked R18 (or Fuel Pump Relay).
- Carefully pry the relay with a screwdriver and remove it from the socket.
- Install the new relay, making sure the contacts match.
- Replace the unit cover and connect the battery.
After replacement, check the operation of the system:
- Turn the ignition key to position
ON(do not start the engine). - Listen - you should hear the sound of the fuel pump operating (buzzing in the area of the gas tank).
- Start the engine. If it starts up stably, the relay is working properly.
🔧 Key Takeaway: If the problem remains after replacing the relay, check fuse, wiring from the relay to the pump or itself fuel pump.
What to do if the new relay does not work?
Check the voltage at pin 30 (should be 12V when the ignition is on). If not, the problem is in the power circuit (fuse, ECU). If there is voltage, but the relay does not click, there may be a break in the winding or a malfunction of the control unit.
Relay cost and where to buy?
Fuel pump relay price for Nissan Almera Classic depends on the type (original or analogue) and place of purchase. Below is a table with current offers:
| Relay type | Article | Price, rub. | Where to buy |
|---|---|---|---|
| Original (Nissan) | 25230-4M000 | 1 200–1 800 | Official dealers, Exist.ru |
| Original (alternate) | 25230-4M010 | 900–1 500 | Auto analysis, Emex.ru |
| Analogue (Bosch) | 0 332 019 150 | 400–700 | Auto stores, Wildberries |
| Analogue (Hella) | 4RA 003 507-331 | 500–900 | Autodoc, Ozon |
💰 Saving tip: If an urgent replacement is needed, you can temporarily install a relay from Nissan Primera P12 or Renault Megane 2 - they are compatible in terms of contacts and characteristics.
⚠️ Attention: When buying an analogue, pay attention to switching current (must be at least 30A) and contact type (must match the original). Cheap relays without a brand often “burn out” after 1–2 months.
Frequently asked questions and errors when replacing a relay
When diagnosing and replacing the fuel pump relay with Almera Classic owners often make mistakes. Let's look at the most common ones:
- ❌ Confusing the fuel pump relay with the fan relay. They are similar in appearance, but have different markings (R18 vs R17).
- ❌ Don't check the fuse. Blown fuse
15Agives the same symptoms as a faulty relay. - ❌ Ignore contact status. Oxidated or burnt sockets in the fuse box can cause poor contact even with a new relay.
- ❌ Buy relays without testing. There are many counterfeits of original items on the market Nissan.
🔍 How to avoid mistakes? Always refer to the diagram on the fuse box cover and check contact voltage before replacement. If in doubt, take the old relay with you to the store for comparison.
FAQ: Answers to popular questions
Is it possible to drive with a faulty fuel pump relay?
No. If the relay fails completely, the engine will not start. If it works intermittently, there is a risk of stalling while driving, which is dangerous. Replace the relay at the first sign of trouble.
How to distinguish a relay failure from a fuel pump failure?
If the relay clicks but the pump does not hum, there is a problem with the pump or the wiring. If the relay does not click, check it with a multimeter or replace it with a known good one. Also make sure that the relay is receiving +12V (pin 30).
Which relay can be used instead of the original one?
Analogues from Bosch (0 332 019 150), Hella (4RA 003 507-331) or relay from Nissan Primera P12, Renault Megane 2. The main thing is the coincidence of contacts and current load (30A).
Why does a new relay quickly fail?
Reasons: poor contact in the fuse box socket (oxidation), voltage surges in the on-board network or fuel pump malfunction (increased current). Check the circuit with a multimeter.
Do I need to “program” the relay after replacement?
No, the fuel pump relay is on Almera Classic does not require adaptation or error reset. After replacement, the engine should start immediately.