Pinout of fuel pump plug VAZ 2110

Design of the VAZ 2110 fuel pump for injection and carburetor car models

Mechanical fuel pumps, which were installed on the first modifications of the VAZ 2110/2112, have a simple design.
It is based on a set of membranes made of special rubberized fabric that is resistant to the chemical action of gasoline. The pump body has two valves: inlet and outlet. The membranes are driven by a rod (pusher). It is driven by a cam mechanism rotated by a camshaft. With an electric fuel pump, things are much more complicated. Its design is based on a small electric motor. It is no different from a regular one, although it works completely immersed in gasoline. The pressure in the system here is created not by a membrane (although there are such pumps), but by a specially shaped impeller mounted on the electric motor shaft.

The VAZ 2110 fuel pump is located directly in the car’s tank.

The service life of the electric fuel pump is 150–200 thousand km. But it can fail much earlier. The main cause of breakdowns when the resource is not used up is additives added to gasoline, as well as various kinds of mechanical impurities. The former destroy the brushes and commutator, while the latter clog the valve mechanisms.

Gasoline pump VAZ 2110 injector price

Electric fuel pumps 2110 are produced by various manufacturers; they can be sold either assembled with a housing, or the electric motors themselves can be sold separately. It makes sense to change the BN assembly only when the bulb (body) of the device is damaged; more often than not, only the fuel pump motor itself requires replacement, since it basically stops working.

Main manufacturers of fuel pumps 2110-2112:

• Weber;
• HOFER (Germany);
• Bosch;
• SEPO (Saratov);
• Pekar (Russia).

For VAZ 2110 injector fuel pumps, the cost may vary; on average, BN can be purchased at a price from 700 to 4500 rubles. The most inexpensive products are produced by Hofer and Pekar; the average price of an electric fuel pump (motor) complete with a Pekar mesh filter is about 800 rubles. The most expensive are Bosch BNs; the cost of the assembled device is 4300-4600 rubles.

Ground contact

Problems with the fuel pump weight can be indicated by incorrectly indicating fuel. Poorly secured ground can cause the fuel pump to stop pumping fuel. The ground wire is located under the dashboard and runs through the entire interior of the car. You need to find it, clean the contacts and secure it properly to the fuel pump.

Next to the ground, under the dashboard, there is a fuel pump relay. After turning on the ignition, the operating relay allows the pump to create the required pressure in the system in a few seconds, after which it turns off. When you turn the key in the ignition, you can hear a soft click, which means that the fuel pump relay is turned on, and exactly the same when it is turned off. If the relay does not make a click, then the problem is in it or in its contacts. Then it is advisable to replace it with a new one.

When looking for the cause of a non-working fuel pump, you need to check the fuse. It is located under the hood and has a resistance of 15 A. It must be carefully inspected; if it is not working, it should be replaced with a new one. The fuel pump in the VAZ-2110 car is immersed in gasoline for active cooling, and the bad habit of driving a car with a minimum amount of gasoline in the tank can very soon cause the fuel pump motor to become inoperative due to burning.

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Causes of malfunction

During operation, VAZ 2110 car owners may encounter some difficulties associated with this element. Malfunctions of the VAZ 2110 injector fuel pump can be as follows:

• element failure due to breakdown;
• a dirty tank or low-quality gasoline with foreign inclusions that contaminate the pump filter.

The very first sure indication that the VAZ 2110’s fuel pump is faulty is the following symptom: the engine “jerks” during operation, especially at medium and high speeds. This indicates that the fuel pressure is insufficient. But this is precisely what the fuel pump is responsible for. But sometimes the reason should be sought in the injectors, as well as the RTD.

Fuel pump VAZ 2110 disassembled (in the photo you can see the dirt in the glass)

There are main signs of a malfunction of the VAZ 2110 injector fuel pump, in which you should definitely take action to check this component:

1. A loud noise that the element has not previously made.
2. The vehicle refuses to gain speed and also does not move when engaging first or second gear.
3. The car moves jerkily and behaves strangely on the road.
4. The engine suddenly stopped running.

Each of the VAZ 2110 fuel pump malfunctions must be carefully considered in order to understand what to do if you encounter them.

Where is the fuel pump relay for VAZ 2110 injector?

Often, due to a relay failure, the engine stops starting; to fix the problem, it is necessary to replace the faulty part. The fuel pump relay (RB) of the VAZ 2110 injector is located in the car interior, under the instrument panel, next to the center console. To get to the pump, you need to unscrew the two screws of the protective plastic casing and dismantle it - of the three elements located here, the “relay” responsible for the operation of the pump will be located in the center (in the figure below, number 5).

Pump operation

Anything can happen while operating a car. In particular, the fuel pump may break down. Or the fuel tank is dirty, and therefore the filter installed at the bottom of the pump. It is worth paying attention to the fact that VAZ cars are very popular in our country. There are a lot of spare parts for them; you can find them in any auto store.

True, the quality of products is not always good. Sometimes you come across outright fakes on the market that cannot last even a few months. Of course, you can run into a low-quality spare part even if you purchase it for a foreign-made car. The service life of the VAZ 2110 pump is about 100 thousand km.

description, operating principle, malfunctions and repairs

The fuel pump is one of the important elements of the fuel system of any car. Its main task is to supply fuel from the tank to the distribution rail and injectors under the required pressure. Read about the VAZ 2110 mechanical fuel pump here.

Where is the VAZ 2110 fuel pump located?

And it is located in domestically produced cars directly in the tank of the car. Let's take a closer look at the VAZ 2110 injector fuel pump.

What, where and why?

As mentioned above, the pump is located in the car tank, while it is immersed in fuel. It would seem that this is a dangerous proximity (of fuel and an element driven by electric current), but I dare to reassure you, this arrangement of the pump does not pose any danger and was done for the following reasons:

1. the pump contains an electric motor that directly drives the pumping element itself;
2. a bunch of these units must not only supply fuel, but also do so under significant pressure.

All of the above, in turn, leads to the pump being noisy and requiring cooling. It is for these purposes that it is immersed in the fuel tank: the fuel acts for the fuel pump both as a coolant and as a noise-insulating compound.

By the way, the described scheme is applicable not only to the VAZ 2110, but also to most fuel-injected cars.

As for the “ten” itself, it uses a fuel pump manufactured by Bosch.

This pump is capable of creating a pressure in the fuel system of 3 atm. It is located in the so-called fuel assembly in the car tank, which also includes a fuel level monitoring system in the tank and a pre-cleaning mesh filter. The VAZ 2110 fuel pump is controlled by the engine’s electronic control unit (ECU) through the corresponding relay.

Principle of operation.

Fuel from the fuel pump is supplied through the fuel line to the fuel rail, having previously passed through a fine filter. The fuel rail is connected to the injectors. The latter, at the commands of the ECU, spray fuel into the engine manifold.

The pressure regulator included in the rail allows you to maintain the required pressure in the rail. It releases excess pressure through the fuel line back into the tank.

Malfunctions and repairs.

The main malfunctions of the “tens” fuel pump include cases when it does not create the necessary fuel pressure or does not work at all. Moreover, the reasons for both the first and second cases can be: breakdown of both the pump itself and its control elements; the condition of the fine filter and the tightness of the fuel line.

By the way, if the VAZ 2110 fuel pump itself breaks down, it cannot be repaired (it is replaced). The following factors in vehicle operation can lead to this:

1. the habit of driving with an almost empty tank, due to which the fuel pump housing is almost always in a semi-dry state, causing it to overheat and suddenly fail;
2. Failure to comply with the regulations for replacing filter elements in the fuel system leads to increased load on the fuel pump, because it not only has to maintain the required pressure in the fuel system, but at the same time also pushes gasoline through a filter clogged with dirt.

Considering the above, I would like to advise you to take care of your car and follow all the recommendations of its manufacturer. Only with such an attitude can you count on him to respond with loyalty and not let you down at a crucial moment.

Video on removing and disassembling the VAZ 2110 fuel pump

How to check the fuel pump on a VAZ 2110

If the gas tank is full, the battery is in normal condition, the spark plugs are dry and give a spark, and the starter turns the engine, then the reason is the fuel pump. A more common reason is that after turning on the ignition, power does not flow to the fuel pump.

Assembling the fuel pump VAZ 2110 (installing the insert)

In the same way, it manifests itself when the car is moving, when power is lost and the engine begins to stall. Another important aspect is the supply of the required amount of fuel.

How to test a relay

If the electric fuel pump does not show any signs of life when the ignition is turned on, this does not mean that it has burned out. The cause of the malfunction may also be a relay. The easiest way to check the RB by ear is that when you turn on the ignition, the relay should click. If you don’t hear a click, there is a high probability that the “relay” is faulty.

But not everything is so simple - the problem can be “tricky”, for example, the car does not start the first time. The cause of the malfunction may be hidden in burnt relay contacts. It’s quite simple to check the functionality of the pump itself; proceed as follows:

• remove the protective casing, under which there is a block with relays and fuses;
• we unscrew the fastenings of the block, remove it, it remains attached to the wires;

  

• we pull the RB out of the block, place a jumper between two opposite contacts, thus directly supplying power to the BN;

  

• If, with such a connection, the electric motor of the pump begins to make noise, it means that the BN itself is working, most likely, the malfunction is hidden in the relay.

If there is no voltage on any of the contacts on the RB block, you should look for a break in the wiring; there may also be poor contact at the place where the wire is attached to the terminal.

Pressure check

But we should not forget that the automaker wrote all its requirements based on the experiments carried out. If the gas pump does not pump fuel into the system at a pressure of 4 kgf/cm2, then the best way out would be to install a new element. Of course, it is quite possible that the filter at the bottom of the fuel pump has simply never been cleaned.

If you replace it, it is possible that the level of pressure created by the VAZ 2110 fuel pump will increase significantly. And it will be quite enough for the car to have normal throttle response and dynamics when driving at high speed. Conventionally, you can carry out a small diagnostic of the fuel pump by disconnecting the fuel line from the ramp.

Mechanical replacement

First of all, let’s check whether the supply system of your VAZ 2110 is working at all. To do this, you need to take the following steps:

1. Remove the pump fuel hose from the source or discharge fitting;
2. Manually press the fuel pump lever several times;

   

3. If the pump is operational, a strong stream of fuel will immediately flow through the fitting;
4. If there is no jet or it is very weak, it will be necessary to carry out other checks.

   

Next, check the operating condition of the intake valve:

1. Disconnect the hose from the suction fitting so that both hoses are eventually removed, each from its own fitting.
2. Simply plug the suction fitting with your finger, then pull the lever several times to manually pump fuel. If everything works fine, your finger will begin to be sucked into the fitting. This effect indicates that the pump is working properly. Therefore, we look for the problem in the tank or lines.

   

3. If there is no suction, you will have to disassemble the device to replace the inlet valve. Its tightness is most likely broken.

The next step is to check the VAZ 2110 fuel pump for leaks for this:

1. Place your finger on the hole from the injection fitting and pump up the fuel several times using manual pumping;
2. In this case, a stream of air should come out of the hole, significantly repelling the pressed finger;
3. If the stream turns out to be weak or does not exist, the fuel pump simply does not pump.

To check the electric fuel pump on a VAZ 2110, you will need an indicator sold in any car store. The installation of the indicator, in each specific case, should be done in accordance with the instructions that come with it. Then the engine is started and, after a few minutes, it is turned off.

You can also check the fuel pump using a pressure gauge. It is connected directly to the fuel rail, and the device itself is connected to the windshield of the car (this is done under the edge of the hood).

The process of checking the pressure in the fuel pump VAZ 2110

As soon as the ignition is turned on, it is necessary to take the pressure gauge readings (they should not exceed 380 kPa and be less than 300 kPa). After accelerating the car (it would be optimal to do this up to 3rd gear), you again need to take the pressure gauge readings, which, if the fuel pump is working, should not vary much and go beyond the specified range.

If the car stalls while driving, first of all, check the relay on the fuel pump. This procedure consists of connecting a special light bulb to the fuel pump connector. After this, turn on the ignition. If the light stays on for a few seconds, then the fuel pump relay is working properly.

If fuel starts to leak, you just need to change the filters or gaskets. It may also be necessary to replace the diaphragm, or, in rare cases, valves.

When choosing a fuel pump for a VAZ 2110, confusion often occurs between the concepts: the fuel pump module and the fuel pump itself. In the first case, we are talking about the assembled structure, which we remove from the tank, in the second, we are talking about the fuel pump motor.

The choice of a fuel pump is carried out according to the following criteria: reliability and quiet operation, because the quieter the pump operates, the more comfortable it is to use.

If you find problems with the fuel pump, you can try to repair it yourself, or replace it with a new one. In the first case, it is better to buy a repair kit. It includes all the elements of the device that can fail: valves, gaskets, diaphragms and pusher.

If you decide to replace the pump assembly, it is even easier.

After dismantling the faulty device, you need to:

1. Install new gaskets and pusher.
2. Place the pump in place and secure it with nuts.
3. Connect the fuel line hoses and secure them with clamps.
4. Press the manual primer lever several times to fill the pump with fuel.
5. Start the engine and check its operation.

   
   A new fuel pump is installed on new gaskets

Fuel pump VAZ 2110 carburetor price

Unlike electric fuel pumps, mechanical fuel pumps are generally cheaper; the price largely depends on the manufacturer. The most famous companies producing gasoline pumps:

• BAKER;
• DAAZ.

The cost of the device ranges from 350 to 850 rubles; repair kits are also sold for used mechanical pumps; the kit contains a diaphragm, rod, and valves. The repair kit is quite cheap - from 70 to 200 rubles, but it does not always make sense to carry out repairs, since the pump assembly itself is inexpensive.

An interesting fact is that the fuel pump for carburetor engines for the VAZ “ten” is suitable for the VAZ 2108-09-099 models, as well as for the Zhiguli VAZ-classic 2101-07. The “Classic” BN differs only in a slightly different arrangement of fuel fittings, and in order to install the pump from the “Classic” on a car 2110, it is necessary to use longer fuel hoses.

Relay and fuse

If the engine suddenly stops starting, you should not immediately blame the fuel pump for everything. First of all, make sure that the switching relay is working properly. Also be sure to check the VAZ 2110 fuel pump fuse to see if it is receiving power from the battery. The relay, which turns on the tens fuel pump, is located in an additional compartment, which is located at the passenger's feet.

It happens that the contact disappears in the relay connection block itself. Therefore, it is enough to just pull out and install a new one of this relay. If the car is quite old, then it is quite possible that the circuit board has begun to deteriorate. Small cracks form at the soldering site, which prevent current from flowing normally. As a result of this, the VAZ 2110 fuel pump relay does not turn on.

Fuses and relays VAZ 2110

F1 – 5A – License plate lamps. Instrument lighting lamps. Side light indicator lamp. Trunk light. Left side side light lamps F2 – 7.5A – Left headlight (low beam) F3 – 10A – Left headlight (high beam) F4 – 10A – Right fog lamp F5 – 30A – Door window electric motors F6 – 15A – Portable lamp F7 – 20A – Electric motor of the engine cooling system fan. Sound signal F8 – 20A – Rear window heating element. Relay (contacts) for turning on the heated rear window F9 – 20A – Recirculation valve. Windshield and headlight cleaners and washers. Relay (winding) for turning on the rear window heating F10 – 20A – Reserve F11 – 5A – Side light bulbs on the right side F12 – 7.5A – Right headlight (low beam) F13 – 10A – Right headlight (high beam). Indicator lamp for turning on the high beam. F14 – 10A – Left fog lamp F15 – 20A – Electric seat heating. Trunk lock lock F16 – 10A – Relay-breaker for direction indicators and hazard warning lights (in hazard warning mode). Hazard warning lamp F17 – 7.5A – Interior lighting lamp. Individual backlight lamp. Ignition switch illumination lamp. Brake light bulbs. Clock (or trip computer) F18 – 25A – Glove box lighting lamp. Heater controller. Cigarette lighter F19 – 10A – Door locking. Relay for monitoring the health of brake light lamps and side lights. Direction indicators with warning lamps. Reversing lamps. Generator excitation winding. On-board control system display unit. Instrument cluster. Clock (or trip computer) F20 – 7.5A – Rear fog lamps

K1 – relay for monitoring the health of light bulbs; K2 – front wiper relay; K3 – repeater and alarm relay; K4 – low beam relay; K5 – high beam relay; K6 – additional relay; K7 – relay for turning on the heated rear window; K8 – backup relay

Diagnostics

If it is impossible to start the car, when the starter turns the flywheel perfectly and there is a spark, you should check the fuel supply. If the pump works and gasoline enters the ramp, then the cause should be looked for further. To initially check the operation of the pump, just open the tank lid and, turning on the ignition, listen, the characteristic pumping noise should sound.

You should not immediately change the unit; first you need to check the fuse responsible for the operation of the electric motor of the fuel pump. Even if it is working properly, you need to check the power supply with a multimeter or probe and examine the relay. If power is supplied, then replacing the pump cannot be avoided.

It is more difficult when the pump is running, that is, it buzzes when turned on. First you need to check the condition of the filter, clean it if it is clogged with foreign impurities. Interruptions in operation can also be caused by faulty spark plugs, injectors, sensors, or a decrease in pressure in the fuel line. The pressure in the ramp, in turn, depends on the tightness of the main pipeline connections and the serviceability of the bypass valve.

It would be a good idea to measure the pressure using a pressure gauge with the fuel pump on but the engine stopped. Absence or significant deviation from the norm will indicate a malfunction.

Replacing the fuel pump mesh for VAZ 2110 injector

Russian fuel does not always meet quality requirements, and over time, due to poor gasoline, dirt accumulates in the gas tank in the form of sediment. The debris also clogs the filter screen of the electric fuel pump; due to the accumulated dirt, the fuel does not fully enter the fuel line, causing interruptions in the operation of the internal combustion engine. To eliminate the malfunction, it is necessary to clean or replace the coarse filter, but to get to the mesh, you need to remove the BN.

Before starting disassembly, you should reduce the pressure in the fuel system, otherwise, when unscrewing the fuel line fittings, gasoline may escape in a stream and flood the entire interior of the car. To relieve the pressure, remove the fuse responsible for the operation of the BN, start the engine and wait until it stalls. We replace the VAZ 2110 injector fuel pump mesh as follows:

• turn off the ignition;
• in the back seat in the cabin we find hinges, and by pulling them, we fold the lower “seats” forward (right and left);
• there is a hatch on the bottom under the seat, it is secured with two self-tapping screws;

  

• unscrew the screws and dismantle the hatch;

  

• disconnect the plug from the wires that supply power to the electric fuel pump; to do this, bend the latch and forcefully pull the parts of the connector away from each other;

  

• unscrew the fittings of the fuel pipes - main supply and return (17 mm wrench);

  

• unscrew the nuts of the pressure plate of the used pump (there are 8 fasteners here, 7 mm wrench);

  

• The nuts are small, it is better to put them in some kind of jar so as not to lose them. Remove the plate and remove the pump assembly from the gas tank. You need to remove the fuel pump together with the rubber sealing ring and lift the pump carefully so as not to damage the fuel level sensor. When removing the BN housing, it is necessary to tilt it, otherwise it will not come out of the tank;
• remove the screen from the fuel pump and install a new part;
• We install the electric fuel pump in place. Here it is important to put the housing in the old places - if you move the used pump, it will be impossible to tighten the fuel line fittings.

Extraneous sounds

If suddenly there is an extraneous sound when the fuel pump operates, you will need to completely remove it. It is worth noting that the VAZ 2110 fuel pump consists of several parts; the base is an electric motor. It drives an impeller, which pumps gasoline from the tank into the fuel line.

As a rule, extraneous sounds appear when the engine itself wears out or when the mesh is excessively contaminated, as well as when a non-original one is installed. If you suddenly have such a symptom, it is necessary to either replace or repair this mechanism, since there is a very high risk that in the near future this unit will simply fail.

Signs of fuel pump wear

A faulty fuel pump either works intermittently, that is, incorrectly, or does not function at all. Problems may occur due to severe wear or failure of other system elements.

Signs of a fuel pump malfunction that require checking its functionality are:

• engine failure to start;
• uneven operation of the power unit, it stalls and loses power;
• extraneous noises in the operation of the fuel pump or their complete absence.

Without diagnostics, it will not be possible to determine the nature of the malfunction, and during the test you must always move from the simplest to the most complex.

How to replace the fuel pump on a VAZ 2110 with your own hands - step-by-step instructions

In order to replace the fuel pump on a VAZ 2110, you must perform the following procedure:

1. Disconnect the negative battery terminal;
2. Relieve the residual pressure in the fuel rail using a special fitting;

   

3. The “tens” fuel pump is located under the rear seat of the car. We recline the seat and unscrew the protective cover;

   

4. Disconnect the electrical terminal block of the pump, unscrew the fuel supply and drain lines.

   

5. The rubber gaskets for the tips of the lines should be replaced;

   

6. On a VAZ 2112, the fuel pump is held in place by eight bolts on an O-ring with a lining

   

7. All you have to do is remove the old fuel pump and install a new one according to the indicating arrow on the body of the product.

   

As you can see, removing and installing a fuel pump on a VAZ 2110 is a simple procedure that does not require any special skills from you.

Prevention and useful tips

For trouble-free operation and increasing the life of the fuel pump, professionals recommend:

• refuel only with high-quality fuel;
• maintain the maximum fuel level in the tank;
• do not use a car with a discharged battery;
• promptly replace the fuel filter;
• use sport driving mode less often.

Self-diagnosis and replacement of the fuel pump is quite simple. To do this, you just need to carefully follow the recommendations of professionals. The same applies to preventive measures. Refuel with high-quality gasoline and do not forget to replace the fuel filter on time. Then you will have problems with the fuel pump much less often.

Wiring to the fuel pump

On most cars, the wiring to the fuel pump consists of three wires: “plus”, “minus”, and also a wire for indicating the amount of fuel in the gas tank. If the fuel pump does not pump, then the cause may be a lack of power.

To check the power to the fuel pump, just take a 12-volt light bulb and supply it with power from the external connector of the fuel pump. After turning the ignition, the control lamp should light up. If this does not happen, then the problem is in the external circuits. If the lamp comes on, it will indicate the need to check the internal contacts of the fuel pump.

To check the external wiring, you should alternately connect the positive and negative contacts, which are removed from the fuel pump power connector, to the ground of the pump. The contacts must also be connected to the fuel pump relay. If you place the negative contact on ground, after which the ignition is turned on and the light comes on, then this means that this contact is faulty.

Checking the fuel pump relay yourself

At the beginning of the test, you need to get to the following elements: the pump fuse and its relay. Having decided which relay is responsible for the fuel pump, you should also inspect the fuse. Additionally, you need to check the fuse because the fuel pump relay heats up and then does not respond in a timely manner or does not operate at all due to a malfunction of the specified fuse.

Now let's look at another available way to check using the example of a VAZ 2110 car. The fuel pump relay itself in this model is located near the fuse.

1. To check, you will need a multimeter or a test light of no more than 0.25 A. Next, you should alternately measure the voltage at the control terminals of the device, simultaneously fixing the contact to ground. This method allows you to accurately determine whether the fuel pump relay needs to be replaced.
2. If the warning light does not light up, the pump fuse is working or replaced with a known working one, then attention should be paid to the wiring from the relay to the computer. At the same time, the possibility of malfunctions in the engine control unit should not be ruled out.

Finally, we add that the element may also refuse to work or stick after failures or unqualified installation of a car alarm/immobilizer. The fact is that security and anti-theft systems with an engine start blocking function are often based on interrupting the power supply to the fuel pump. In this case, these systems must be diagnosed separately.

How to determine why the fuel pump does not pump or works poorly. Fuel rail pressure, pump diagnostics. Wiring, relays, fuel pump fuses.

Purpose, design features, installation location of the fuel pressure regulator of an injection engine. Signs of RTD malfunctions, checking the device.

Why does the starter turn normally, but the engine does not catch and does not start? Main causes of malfunction, checking fuel supply and ignition systems. Adviсe.

How to remove the engine start lock. Checking for random activation of the immobilizer and how to disable it. Diagnosis of possible alarm malfunctions.

The causes of whistling and increased noise during operation of the fuel pump are overheating of the pump. How to diagnose and fix the problem yourself. Tips and tricks.

Mechanical and electric fuel pump, design and principle of operation of the device, types of pumps and main malfunctions, operating features

Source: krutimotor.ru