Where is the fuse for the fuel pump VAZ 2114

In this article, today we will look at the process of troubleshooting a VAZ-2114. Initially, the car did not start.

Let's get started:

I couldn't hear the fuel pump running, so I decided to check the voltage on it.
I found out that there is no voltage at the fuel pump. The next step I checked was the fuel pump relay. It turned out to be serviceable, but I heard some strange clicking sound from the upper relay. On a VAZ-2114, the top relay is the main relay, which switches not only the fuel pump, but also other systems, such as the fan relay, speed sensor, oxygen sensor and others.

Replaced the relay with a known good one. To check, I took the relay from the mounting block, in the engine compartment. After turning on the ignition, the click of the main relay turned on indicated that it was working properly and the car started up.

At this point, the inspection of the VAZ -2114 can be considered closed. Replaced the main relay and the car started.

When working with the car’s electrical wiring, do not forget to disconnect the negative terminal of the battery so as not to burn something working.

Fuel pump fuse and its functions

The fuel pump safety device, not only on the VAZ- 2114 , but also on other passenger cars, is just a small element in the vehicle’s fuel system. It has relatively small dimensions, but carries an important multifunctional load.

The main function of this element to protect the functions of the fuel pump is to open the conductive circuit of the auto fuel system. This need arises in case of overload of electronic circuits. When such an overload occurs, the safety element melts due to high temperature, and the electronic circuit becomes open.

The safety element is small in size, and its design is quite ordinary:

• the outer casing is made of plexiglass;
• inside the device there is a conductive element made of plates and fusible material;
• the body is marked in the form of the Latin letter “F” (this designation indicates that the safety device is intended for an electronic circuit with low power).

Thanks to the iron plates and the low-melting material between them, the fuel pump fuse perfectly conducts electronic current, but at a power that corresponds to the markings on the body of this part. If the power characteristics in the electronic circuit are higher than the required value, the low-melting material immediately begins to melt, and the current-carrying circuit opens.

This way, the fuel pump is saved from possible overloads.

Useful video

Additional information on this issue can be gleaned from the video below:

A frequent and unpleasant question: why does the fuel pump fuse blow out? Many, faced with this problem, begin to chaotically look for new fuses and insert the first one they come across. In such a situation, it is not always possible to find exactly the right fuse.

Having installed a new element, the car drives a couple of tens of meters and stops again. At the same time, during these meters traveled, the car manages to shake and shake quite a bit.

The very name “fuse” indicates that this small element protects a more expensive device from failure. If a fuse blows, the problem may lie in something more serious. Therefore, it is not advisable to insert another element instead of the desired one. The fuse consists of thin plates made of a certain material and they are of a fixed thickness.

A fusible element is soldered between the set of plates, which opens the circuit when overloaded. This entire structure is enclosed in a polymer mandrel.

Reasons for the blown fuel pump fuse on a VAZ-2114

fuse on a VAZ-2114 may fail

• Short circuit or other faults in the conductive circuit.
• Failure of components of the power circuit.
• The fuse itself is defective.
• The anti-theft alarm contacts were connected incorrectly.

These prerequisites are standard for most passenger cars.

Where is the fuel pump fuse on the VAZ-2114

In modern passenger cars, the manufacturer immediately installs several special safety blocks in the current-carrying circuit in case of unexpected situations that could damage the vehicle. This is designed to reduce the risk of fire. Such fuses localize the entire electronic circuit to the main areas where short circuits are more likely. Any vehicle has an annotation, which contains detailed diagrams of the location of all parts.

The VAZ-2114 also has a fuel pump safety device located under the hood. A clearer placement of this detail:

• open the hood;
• look towards the windshield;
• there is a plastic box on the ECU;
• This box contains the fuse we need.

On the VAZ-2114 the fuse is marked as follows - Fuel Pump 15A.

Checking the fuel pump fuse on a VAZ-2114

Experts recommend regularly checking the fuel pump safety device on the VAZ-2114. The easiest way to get to this part is from under the hood, that is, from the outside of the vehicle. To do this, you must follow the following step-by-step instructions:

• Open the hood lid.
• Find the plastic box on the engine control unit.
• Open the small unit, which opens and closes with latches.
• Find the appropriately marked safety device (located at the top).
• Remove the safety element:
• for this you will need forceps, tweezers or a clamp;
• grab the safety device with a tool;
• pull the fuse towards you;
• remove from the nest.
• Perform a visual inspection of this device:
• cracks and chips on the body;
• burnt fusible materials inside;
• carbon deposits on the internal plates;
• contacts are damaged.

If the contacts of the safety device are intact, then it can still function. But in such cases it is not worth the risk; it is best to replace the damaged part with a new one.

If there are obvious signs of combustion on the fuel pump safety device, replacing it will not be enough. You will also need to check other details:

• the entire section of the current-carrying circuit for breaks in it;
• pump relay (may stick);
• fuel pump contacts (terminals may oxidize);
• the fuel pump itself.

Experts warn that if the breakdown problem lies not in a blown fuse, but in another part or in the wiring itself, replacing it will not be enough. It is necessary to determine the reason why this element failed. If this is not done, the new fuel pump fuse will burn out in the same way as the previous one.

Pressure check

If the pump is working properly, but the engine begins to operate intermittently, you should check the fuel pressure in the system. For this you will need:

• pressure gauge (can be a tire gauge with a measurement limit of 5–7 kPa);
• petrol-resistant hose with a diameter of 10–12 mm and a length of 50–80 cm;
• two clamps for a hose of the appropriate diameter;
• Phillips screwdriver;
• nipple cap;
• dry rag.

READ Replacing the Slip Rings of the VAZ 2114 Generator

In addition, the presence of an assistant is desirable.

• In the engine compartment on the engine fuel rail, locate the pressure measuring fitting (on the right side).
• Remove the plastic cap (plug) from the fitting.

Recommendations for care and maintenance

Buy original fuses

Domestic or foreign, it doesn’t matter; Install strictly in accordance with amperage ratings. Unacceptable with lower or higher current strength

In the first case, this will lead to damage to the module, in the second - to breakdown of the unit, which is attached to the fuse; Carefully check the quality of fixation of terminals and limit switches on the board. If loose, tighten and press with pliers. A spark can cause a fire and melting occurs; If moisture gets in or condensation forms inside the mounting block, remove the cover, dry it, and if necessary, blow it with a stream of compressed air.

Carry out preventive and diagnostic work in the fuse box with the battery terminals removed in order to prevent a short circuit in the circuit.

The average service life of fuses is 40 – 60 thousand km. The service life of foreign analogues is 10–15% longer. Before replacing, read the instructions and get advice from service station specialists.

We study the signs of a fuel pump failure if it does not pump fuel

The non-pump is one of the key components of the VAZ 2114 . The gasoline pump ensures that gasoline is supplied to the engine at the required level of pressure.

Fuel pump for VAZ 2114

The VAZ 2114 fuel pump does not work (one of the reasons).

Any guarantees from the manufacturer with the actual service life of the fuel pump have little in common, since its durability directly depends on the operating conditions - even the highest quality VAZ fuel pump can quickly fail due to bad gasoline.

Motor

Fuel pump motor VAZ 2114

We checked the pressure and wiring, everything works like clockwork, but the engine stalls. The fuel pump may not pump due to a breakdown of the motor - the main element that drives fuel. We check its functionality with the same light bulb: attach its wires to any terminal of the motor, turn the ignition. The lamp blinked - it was time to throw out the motor. And again, run to the store for a brand new motor.

The terminals may oxidize and not make contact, as a result of which the fuel pump will not pump. The motor in this case may be normal. And the terminals just need cleaning (possibly re-soldering). There is an opinion that the terminals are oxidized due to low-quality fuel (the octane number does not match the declared one).

Symptoms of a problem

A malfunction of the fuel pump of VAZ 2114/2115 cars can be diagnosed by the following symptoms:

• when the ignition is turned on, there is no sound of the pump running;
• the engine does not start or starts with difficulty;
• the power unit is unstable at idle, the speed “floats”;
• “dips” appeared during acceleration;
• the motor has lost power.

The same signs also appear when other elements of the fuel system malfunction.

Before you begin diagnosing or replacing the fuel pump, you should make sure that:

• the fine fuel filter is not clogged (it is changed every 7 thousand kilometers);
• the injectors and fuel pressure regulator are operating normally;
• The sensors for mass air flow, throttle position, and oxygen quantity are working properly.

If the detected malfunction is accompanied by the lighting of the “CHECK” lamp on the dashboard, you should set the error code and decipher it.

Pressure system

The gasoline pump creates pressure in the fuel rail for normal gasoline supply functionality. Let's measure the pressure and we'll understand a lot right away.

Normal parameters of atmospheres in the system are as follows:

• Idle – 2.5
• Ignition – from 3
• Without pressure regulator tube – 3.3
• With pinched drain – 7
• We press on the gas - from 3 to 2.5.

We will measure in these five states with a pressure gauge with a small range of atmospheres (up to 7, to reduce the error to a minimum). Under the hood we found a pressure fitting (just unscrew the cap in advance), attached a pressure gauge (hose) to the fitting and off we went. The ignition is turned on, the pressure gauge is zero: the fuel pressure regulator is broken. We press on the gas, the pressure gauge goes to zero: the fuel pump itself is broken (now you can do some shopping at a spare parts store). There may still be a situation. When the pressure gauge needle lazily rises, look at the condition of the fuel filter.

By the way, if you don’t have a pressure gauge, it’s sad and sad, because it’s an expensive pleasure. Similar diagnostics in the service will cost half as much.

OPERATING PRINCIPLE AND DESIGN FEATURES

The VAZ 2114 fuel pump is located inside the car’s gas tank, which is why access to it can be problematic if you don’t know which side to approach. To free up access to the fuel pump, you need to remove the rear seat from the fourteenth, under which you will find a rectangular hatch hiding access to the fuel module.

Just recline the back seat and see for yourself

In addition to the pump itself, the VAZ 2114 fuel module includes:

• A float sensor that monitors the fuel level in the gas tank;
• Chamber for fuel intake;
• Mesh filter for coarse cleaning.

The gasoline pump has a built-in electric motor, which pumps up the pressure of the pumped fuel. The motor itself is powered from the vehicle's on-board network. gasoline pump is located so that even with a minimum level of fuel in the tank, it is constantly washed with gasoline, as this is necessary for normal cooling of the unit, which gets very hot during operation.

The main working element of a gasoline pump is a membrane, which during operation performs reciprocating movements. During normal operation, when the device is fully operational, the following pressure levels must be maintained in the fuel rail:

• For 1.5 l engine. – from 285 to 326 kPa;
• For 1.6 liter engine. – from 375 to 390 kPa.

Unlike domestically produced units, they cost almost 20-30% more, but at the same time they have an order of magnitude better build quality and reliability. Approximate. at 1.6 l. – 2.6 thousand

However, rational savings are possible here - in most cases it makes sense to purchase a fuel pump separately, rather than the entire module, since, as a rule, the pump itself “dies”, and the remaining parts of the module remain in working order. Its cost, if taken separately, is 1-1.5 tr.

Fuel pump relay price

The fuel pump switch for the VAZ 2114 cannot be repaired.
If it breaks, it can only be replaced. The part is sold at any auto store. The average cost is approximately 100 rubles. The manufacturer is absolutely unimportant. Since the element can fail at any time, it is advisable to buy it before a long journey. You can buy it in reserve and always keep it in your garage or car. It is worth noting that among these spare parts for the “fourteenth” there are many defects. Therefore, if after purchasing and replacing the pump does not work, you should not immediately blame it. Perhaps you just got a faulty relay. You should change it again or ask a friend to check a known good element. Most likely, everything will work as it should. Source

CHECKING THE FUSE

First, let's figure out where the VAZ 2114 fuel pump fuse is located: you can find it under the hood, on the windshield side. There is a drawer on the electronic control unit that needs to be opened. In the box we need a fuse that says Fuel Pump 15A above it. If the fuse for the VAZ 2114 is blown, you need to install a new one.

The fuse blows due to incorrectly connected alarm contacts or the anti-theft system.

Fuel pump fuse VAZ 2115

The fuel pump relay is located under the dashboard. On the passenger side, a side panel is opened that covers the beard on which the radio, on-board vehicle, and heater controls are mounted. We see a strip with three relays and fuses.

VAZ 2114 fuel pump does not work

The pump relay is the lowest. Its fuse is also at the very bottom. When you turn the key, the relay turns on for 5 seconds in order to pump up pressure in the system and turns off. After the engine starts, control of the pump passes to the computer.

The mass of the pump (and fuel level sensor) is attached to the stud securing the handbrake to the body under the carpet. To get to it you need to remove the vestibule between the passenger and driver seats. to the fuel pump : the first one. the second is negative, the third is the fuel level sensor.

CHECKING WIRING CONTACTS

If the fuel pump does not work, do not rush to change it - perhaps the problem is in poor-quality wiring. There are 3 wires connected to the pump: to the gasoline level sensor, and positive and negative to power the motor.

No special tools are required to check the wiring - a regular 12-volt light bulb is enough. We connect the light bulb to the negative and positive wires of the pump, and turn on the car’s ignition - if the light blinks, then everything is fine with the wiring.

Where is the fuse for the fuel pump VAZ 2114

Where is

If we describe them from top to bottom, we get the following:

The fuse that controls the fuel pump. Its current strength is 15 amperes.

Lit

A fuse is a small element whose task in the design of electrical circuits is to melt in the event of an overload. The device melts and the current-carrying circuit opens.

Using the example of a solution from the popular VAZ Priora model, we can superficially examine the design and principle of operation of the fuse. The device is small, the outer casing is made of plexiglass.

There is a conductive element inside. Such an element is based on several plates, which are made of different materials. Between these plates there is a special low-melting material. Electricity passes through this material, which allows the fuse to be an integral part of the electrical power circuit of the fuel pump. Fuses have a special marking in the form of the letter F. This designation indicates that the fuse element belongs to a circuit whose power is not large. To calculate the current that certain devices are designed for, you need to divide the power by 220. The result will be a figure in amperes.

READ Where is the VAZ 2115 generator relay located?

If the fuse is blown, then such a malfunction is often caused by the following reasons:

In other words, more often the fuel pump fuse blows due to faults in the electrical circuits or as a result of failure of the components of the pump power circuit. Note that situations also arise when fuse on its own, but this phenomenon occurs much less frequently with high-quality elements.

How to identify a malfunction

The fuel pump relay turns on the fuel pump and delivers fuel to the injectors. The safety relay is activated when the engine is not running and the ignition is on (the control unit does not receive speed signals). This relay is switched off in the control unit via a safety switch and interrupts the power supply to the pump. For example, in the event of an accident, gasoline cannot flow into the engine. Checking the fuel pump is a job most likely reserved for service centers. In this regard, to find errors, we will limit ourselves to the following points:

— disconnect the fuel supply line at the distributor, while preparing a rag for spilled gasoline;

— even when the engine is turned off, a certain amount of gasoline may come out, since the system is under pressure;

— turn on the ignition for a short time without turning on the starter;

— if the pump does not start working, check the fuse or safety relay again;

— if fuel does not flow, check the pump relay;

— if the relays are working properly, the fuel pump should start working;

- otherwise, remove the cover under the rear seat and carefully tap the pump housing with a small hammer - sometimes it helps;

— check the correct connection of the wires to the fuel pump;

- if the pump does not work, check the voltage using a diode bridge (a conventional test lamp can damage the control unit). Don't forget to turn on the ignition first;

- if the voltage is normal, it means the pump is damaged or there is an open circuit. The pump should be replaced with a new one.

Signs of a fuel pump failure

A faulty fuel pump is quite easy to identify, since it is characterized by characteristic signs of failure. For example: while driving, the car suddenly stalls - after turning it on again, the engine begins to make uncharacteristic sounds, while the starter does not stop turning. After the car starts up, the picture repeats itself - the fourteenth engine stalls again. It is also possible that the car starts every once in a while - problems usually arise after sitting at neutral speed.

Let's determine the most typical signs of a fuel pump malfunction:

• The engine refuses to start. Of course, there can be many reasons for this problem - the same spark plugs, or the ECU, but the possibility of a fuel pump malfunction is also worth taking into account;
• The pressure level in the fuel relay differs from normal values;
• The motor is tripping. As a rule, if the fuel pump does not pump as it should, the engine begins to twitch quite noticeably because gasoline is not burned properly in the working cylinders;
• The engine growls at low speeds. One of the most truthful signs, which indicates either an immediate breakdown of the pump, or that the low-purity filter is clogged and the mesh needs to be replaced.

There are quite a lot of possible breakdowns that could cause the fuel pump to fail. The following parts of the unit design can present an unexpected surprise: fuse, fuel pump relay, ground, electric motor, contact system. Let's look at each of them separately.

Pressure level

In order to get most of the picture of what is happening, it is enough to measure the pressure in the fuel rail. For this, it is necessary to use a pressure gauge that has a small measurement range (preferably up to 7 atmospheres), since devices with a large range can produce significant inaccuracies.

Rail pressure measurement

Under the hood of the fourteenth there is a pressure fitting; unscrew its cap and connect the pressure gauge to it.

Normal indicators should be as follows:

1. When the engine is idling – 2.5 kPa;
2. At the moment of ignition - 3 kPa;
3. With a pinched drain hose – 7 kPa;
4. When gaining speed - 2.5-3 kPa.

If the pressure gauge needle does not move when the ignition is turned on, then the gasoline pressure regulator is most likely broken. When there is no change as the speed increases, the fuel pump itself has failed, but if the needle moves very slowly, which indicates that the pump is pumping, but poorly, the fuel pump screen is clogged.

How to test wiring with a multimeter

If the fuel pump does not work, do not rush to change it - perhaps the problem is in poor-quality wiring. There are 3 wires connected to the pump: to the gasoline level sensor, and positive and negative to power the motor.

No special tools are required to check the wiring - a regular 12-volt light bulb is enough. We connect the light bulb to the negative and positive wires of the pump, and turn on the car’s ignition - if the light blinks, then everything is fine with the wiring.

Fuel pump motor

When you have determined that the external wiring of the fuel pump is normal, you need to move on to checking the motor. This is done with the same light bulb, the wires of which are connected to the external terminals of the motor. If the light comes on when you turn on the ignition, then you need to change the motor.

Fuel pump ground and relay

In the fourteenth, the mass of the fuel pump is fixed under the dashboard, next to the handbrake lever, during use of which the mass can be touched and shifted from its normal position. To fix this, remove the plastic around the handbrake, clean the ground contacts and reattach it.

Next to the ground there is a VAZ 2114 fuel pump relay. The relay is necessary so that during ignition the required pressure level is immediately created in the system.

A few words about where the fuel pump relay is located: after removing the plastic around the handbrake, you will immediately find 3 different relays - one of them is from the fuel pump.

It is better to immediately replace a broken relay with a new one; it is not expensive.

Where is the fuse for the fuel pump on the VAZ-2110

The fuel pump on a car is designed to supply fuel to the combustion chamber. Its operation is controlled using a relay. On the VAZ-2110, the fuel supply unit can be electrical or mechanical. It all depends on the fuel supply system. On a fuel-injected car, the fuel pump is located in the tank.

Access to the fuel pump is possible through the inspection hatch located under the rear seat.

The device of the node is simple. It consists of an electric motor that is supplied with power. A filter is installed at the outlet of the pump. There are also other filters in the fuel supply system. This helps prevent the fuel line from becoming clogged.

Principle of operation

Injection engine power supply system.

• When the ignition is turned on, voltage is supplied to the terminals of the unit.
• It starts pumping fuel.
• If the required pressure is created in the system, the relay automatically turns off the fuel pump.
• The car engine is ready to start.

What is a relay?

It is designed in the system to prevent accidental application of high voltage to the fuel pump winding. The relay is standard and consists of a plastic body and coils with contacts.

Where is it located?

Often, to fix a breakdown in the fuel system, you need to change the relay. It is located in the car interior near the console. To access it, you need to remove the protection cover.

Fuel pump relay number 5 in the diagram:

Changing the fuel pump yourself

If the fuel pump in the VAZ does not pump, and all of the above system components are normal, it is necessary to clean the filters, and, if necessary, completely replace the unit.

Before starting work, you must completely drain the fuel from the gas tank. To do everything with our own hands, we need a screwdriver and a set of keys. Replacing the VAZ 2114 fuel pump is carried out according to the following algorithm:

1. We de-energize the car by removing the “-” terminal from the battery;
2. We take out the rear row of passenger seats;
3. Unscrew the plastic cap that covers the pump;
4. Remove the power wires from the device and disconnect the fuel supply hoses;
5. We dismantle the main fastenings of the fuel pump; for this we need the 7th key;
6. Now you can remove the fuel pump on the VAZ 2114 and remove the device.

It must be removed carefully, since the float sensor for determining the fuel level is a very delicate structure that is easy to damage . Inspect the fuel pump - if necessary, clean or replace the strainer, however, it may be necessary to completely replace the unit.

Which fuse is responsible for the fuel pump on the VAZ-2110

Car: VAZ-2110. Asked by: Alexander Khromtsov. The essence of the question: the fuel pump hums every now and then, where is its fuse ?

Now, I noticed that the fuel pump does not always turn on when the key is turned in the ignition. With what it can be connected? I blame the fuse, although if it had blown it would not have worked at all. I want to see if the contact is bad?

Electrical diagram

• Fuse.
• Gasoline pump.
• Postings.
• Relay.
• Control unit.

Problems related to the fuel pump

So, you need to analyze several symptoms of the main breakdowns of the dozen injection systems. If the VAZ 2110 fuel pump activation relay is faulty, then when you turn the ignition key you will not hear the characteristic hum that comes from the rear of the car. It is quite possible that there has been a break in the power supply circuit of the winding of the electromagnetic device. Check if there is voltage on it. It is possible that the fuse may fail. Please note that if fuses burn one after another, you should not spend money on buying new ones, but look for the reason for this behavior.

If fuses constantly fail, then there is a short to ground in the connectors or wiring. Moreover, you need to look in that part of the circuit that is located after the protection device. It is also possible that everything is fine with the wiring, the relay works, but the VAZ 2110 fuel pump does not pump. The reason is a lack of power or a breakdown of the engine itself. Among the latter, we can highlight breaks in the rotor and stator windings and wear of graphite brushes. And one more thing I would like to highlight: monitor the condition of the filter (diaper), which is located at the bottom of the fuel pump. If it is in poor condition, then the injectors may become clogged and the motor may fail.

Source

Common mistakes

You can use our instructions in one case: when the fuel pump , but other systems are working properly. Sometimes the engine does not start for several reasons at once. And then you need to reduce the pressure like this: wait 5-6 hours, and do not turn on the ignition. Be careful!

Actually, the ramp is under pressure

You can find out about the presence of pressure in the standard way:

• Open the hood;
• There is a fitting on the fuel rail, closed with a plastic cap. They turn him away;
• The nipple cap can be used to unscrew the fitting plug. This action is performed carefully: the residual pressure has not disappeared anywhere.

Even if gasoline starts to gush out, do not try to tighten the fitting right away. Let the pressure drop a little.

Diagnostic connection and plug

Trying to fix a fuel pump is commendable. It will be possible to change its mesh. But the cause of the problem may also be a clogged fine filter.

The replacement filter (“can” 2112-1117010) gradually fails. On all fuel-injected cars, including the VAZ-2112, the fuel pump will not stop working even if the filter is completely clogged. Fuel is not pumped, but the engine does not burn out.

Fuel pump relay? Diagnostics VAZ 2114

The fuse for the VAZ 2110 fuel pump burns out

If the fuel pump on a VAZ 2112 is not working, you need to start looking for a fault by checking the fuse and relay. They are located under the console on the passenger side. Unscrew the two screws and remove the cover. The fuel pump relay is the middle one, of the three that are there. To the left of the relay is a fuse that needs to be checked.

If both of these devices are intact, then you need to check whether the fuel pump itself can work. To do this, you need to connect it directly to the battery. This can be done easier by using the diagnostic block, but if you haven’t figured out which contacts you need to connect the wires to in the diagnostic block, then use long wires to connect the battery to the contacts in the block of the fuel pump itself. If the pump is working, then the fault will need to be looked for either in the crankshaft rotation sensor or in the ECU itself.

READ Where is the Oil Filter on a Ford Transit

If your car has an anti-theft alarm, then it is possible that another relay is installed in the electrical circuit of the fuel pump. It can also fail. You will have to find the place to install it yourself.

If the fuel pump on a VAZ-2112 car fails, its further movement becomes problematic, but if the fuel pump itself is intact, then by connecting it directly you can get to the place where you can find this fault.

LADA cars of the 2112 family were equipped with injection engines. The fuel pump 21102-1139009 is responsible for supplying fuel to these cars. We are talking about a plastic module containing a pump and a level sensor. Similar modules were produced by several companies, and the products varied in quality. If there is a suspicion that the fuel pump is not working, you need to turn on the ignition on the VAZ-2112 - the pump should pump fuel for the first 1.5 seconds. But the sound of a running motor may not be heard. It would be better to measure the voltage at the terminals.

The following video shows how the assembled module is dismantled.

Tips for motorists

The electric fuel pump on a VAZ-2114 passenger car is located in the fuel tank, and after the ignition is turned on, voltage is supplied to its terminals through a 15 amp fuse F3 and relay R2, located under the panel on the passenger side in the car interior.

The first thing the driver of the “fourteenth” does after the fuel pump fails is to unscrew the two screws that secure the cover on the right side of the console under the panel, covering three relays and three fuses, and check the integrity of fuse F3, which is located next to two relays located one behind the other and the state of the contacts where the fuse is inserted. If it is intact, you need to check the fuel pump relay (you can replace it), which is located next to the fuse (it is the middle one among the relays available there).

If everything is in order with the fuse and relay, then the driver’s next action will be to get to the fuel pump terminals. To do this, you will have to lift the rear seat cushion and remove the cover at the bottom of the car body by unscrewing the screws that secure it. In the opened hatch you will see three terminals, one of them is negative, and two are positive (gray and black wires), which supply voltage to the fuel pump and fuel level indicator. You have to check whether voltage is supplied to the positive terminal of the fuel pump motor. This can be done using a control lamp. When you turn on the ignition, it should light up for 3-5 seconds (this is the time it takes to pump gasoline from the tank into the fuel rail before turning on the starter).

If the light comes on and the fuel pump does not work, this means that voltage is supplied and you need to check its value using a tester, since if the voltage is below 10 volts, the electric motor of the fuel pump will not start. The voltage drop occurs due to oxidation of the contacts, so you will have to check the condition of the contacts of both the negative and positive wires. You can also check the serviceability of the fuel pump by applying voltage to its terminals directly from the battery using two long wires. If the above actions do not help, then the fuel pump will have to be removed from the fuel tank and either replaced with a new one, or disassembled and looked for a fault inside it (for example, the brushes are stuck or worn out).

If everything has been checked, but the fuel pump does not work - article numbers

In general, the pump article number for VAZ-2112 engines looks like this: 21102-1139009-XX. Instead of the letters XX there are numbers, for example 02 or 03. They indicate the manufacturer. So, modules from different factories are not interchangeable! The resistance of the FLS resistor is different in them. However, when replacing the FLS sensor, you can borrow it from the “old” module. That's what they usually do.

Until April 2002, article numbers of the type 2112-1139009 were used.

Almost every module available for purchase contains a built-in pressure regulator. There are also exceptions - KSZC-A243, for example. The meaning is as follows:

• VAZ 2114 fuel pump relay is one of the reasons for fuel system failure
• All internal combustion engines with a volume of 1.5 liters are equipped with a ramp with an “external” regulator (2112-1160010);
• The 21124 or 21114 motor requires a built-in regulator.

In conjunction with 1.5 liter engines, you can use any module – both with and without a built-in regulator.

Fuse and relay box

The fuse and relay box is located on the left, lower part of the instrument panel. It is accessible by pressing the button and folding the lid down. To remove fuses, there are special non-conductive pliers in the upper left part of the mounting block.

1 - K5 - high beam relay. If the high beams in two headlights do not work, check this relay. If one of the high beam headlights does not work, check fuses F3 and F13, as well as the lamps and the high beam switch.

2 - K4 - low beam relay. If the low beam in both headlights does not work, check this relay. If only one low beam headlight does not work, check fuses F2 and F12, as well as the lamps themselves and the light switch.

3 - K1 - lamp health control relay.

Designations of analogues

• 21102-062213.0XX – instead of the letters XX there will be a plant designation (07, 13, etc.);
• KSZC-A233 or A243 – KSZC brand. There is no pressure regulator.

Main unit

The main fuse and relay box is located in the rear part of the engine compartment, in the installation department, under a protective cover.

The current diagram for your vehicle can be printed on the back of the protective cover. Check your appointment!

Option 1

Scheme: 2114/ 2115 — 3722010, -3722020, -3722010-30, -3722010-38, -3722010-40, -3722010-48, -3722010-60, -3722010-68

Description of fuses

p, blockquote 10,0,0,0,0 —>

Causes: fuse, relay, connector

The pump power circuit includes many elements: closed contacts of relay 5, fuse 3 (15 A), wire "", wire "pump-ground". The most difficult defect is a short circuit of the wire to ground. By the way, the cord itself is laid on metal, so such a defect cannot be ruled out.

Mounting block for dashboard

Both the relay and the fuse are located in a block located under the dashboard on the right. A fuse can blow in two cases:

• Why the fuel pump on the VAZ-2114 does not pump, and what to do
• The cord "" contacts the ground;
• The motor resistance decreases due to overheating.

The first defect may be “floating”, and then it will be difficult to identify. But before calling an electrician, try checking everything else:

• Relay 5 should click twice: when the ignition is turned on and after 1.5 s. If this does not happen, replace the relay;
• Check fuse 3. If it is blown, you need to look for the cause.

Consider the situation: the relay is working, but the fuse is blown. Then we do this: disconnect the pump connector, install a new fuse and measure the voltage at the terminals. Details are below.

Safety precautions

Before unscrewing the nuts, you need to disconnect the two hoses. But first try starting the engine. The power supply to the fuel pump is not connected.

Please note - the power is turned off here!

Everything is ready for dismantling if:

• External connector is disabled;
• It is impossible to start the engine, although the on-board network is not de-energized;
• It is better if the tank is filled less than 50%.

You need to unscrew two fittings from the module cover (top photo). Then use a socket wrench to unscrew the nuts from the studs and remove the retaining ring.

There is very little left to the internal connector

Having gained access to the internal connector, you need to clean its contacts. Assembly is carried out in reverse order. Good luck!

Oxidation of the terminals of the internal connector is a typical disease of the VAZ-2112 fuel pump, and only one of the contacts does not work. The “” terminal is more often oxidized.

Sources:

https://vikupavtovspb.ru/vaz-2114/gde-nahoditsya-predohranitel-benzonasosa-vaz-2114.html https://vz15-up.ru/lkt/predohranitel-benzonasosa-vaz-2115.html https:// carfrance.ru/kakoj-predoxranitel-otvechaet-za-benzonasos-na-vaz-2110/ https://l2rv.ru/info/gde-nahoditsja-predohranitel-na-benzonasos-vaz/

How to change the pump

If it turns out that the relay for the VAZ 2114 fuel pump, the motor, the ground contact, and all other electrical elements of the circuit are working, all that remains is to replace the damaged pump with a new one.

You can do it like this:

1. Disconnect the battery ground terminal.
2. Drain the fuel from the tank.
3. Remove the rear passenger seats.
4. Remove the plastic cover covering the pump.
5. Disconnect the wires and hoses going to the pump.
6. Unscrew the fuel pump fasteners using a size 7 wrench.
7. Remove the pump from the tank.

Installing a new fuel pump is done in exactly the same order, but in reverse order.