Fuel pump relay gazelle 406 injector where is it located?

Fuel pump gazelle 405 injector does not work

Gazelle fuel pump is a device for ensuring the transportation of gasoline or diesel fuel from the gas tank to the car engine. Let's look at two types of Gazelle gasoline pumps (fuel pumps): mechanical pumps and electric pumps. What these devices are, how they operate, what are their similarities and differences will be discussed in this article.

What is a fuel pump (Gas fuel pump) of a car?

The fuel pump is an element of the fuel system necessary for supplying fuel. To operate a car engine, you need to supply gasoline from the fuel tank, which is located at the other end of the car on the Gazelle frame, directly to the engine. Fuel is pumped from the gas tank to the engine, depending on the design of the Gazelle’s fuel system, using one of two types of pumps: mechanical or electric.

Carburetor engines use mechanical pumps. These motors do not require high pressure. Electric fuel pumps are used in modern vehicles with fuel injection equipment, where it is necessary to supply gasoline or diesel under high pressure.

Mechanical fuel pumps are not mounted in the Gazelle’s gas tank, but on the engine.

They are simple and reliable, they are driven mechanically, from the engine (hence the name “mechanical”). Modern cars do not use a carburetor, but an injection system or injector. This system already requires high pressure. To do this, an electric fuel pump is installed in the Gazelle’s fuel system, which provides such pressure. Sometimes two fuel pumps are used at once: one of them is low pressure and the other is high pressure.

The low pressure fuel pump is placed in the gas tank, and the high pressure pump is placed directly on the car engine.

For the normal functioning of the vehicle’s fuel system, it was necessary to increase the characteristics of the fuel pump and ensure its operation at a pressure of up to six atmospheres. At the same time, the pump increased slightly in size, became more powerful and noisier. To optimize its operation, the Gazelle pump was immersed in the fuel tank. At the same time, several problems were solved. Firstly, the noise of the electric pump is not audible during operation, since it is located inside the Gazelle’s gas tank.

Its operation can only be heard for a short time when the ignition is turned on. Secondly, with the pump immersed in the tank, gasoline began to perform two necessary functions: cooling the electric pump itself, as well as directly lubricating this pump with gasoline passing through it. Based on the design of the electric pump, non-returnable pumps are now gaining popularity, that is, pumps in which the bypass valve is installed directly on the pump.

The system where the fuel drain line came from the fuel rail is currently becoming obsolete.

Description of the operation of the electric fuel pump

The electric fuel pump is driven by its own electric motor. When you turn the key in the car's ignition switch, on-board voltage is supplied from the electronic unit through a relay to the fuel pump electric motor. The gas fuel pump comes into operation with a characteristic sound that is heard for two to three seconds immediately before the vehicle engine starts.

At the same time, the system creates the pressure necessary for gasoline to flow from the gas tank through the fuel supply line through the fuel filter installed to clean gasoline from debris contained in it, to the fuel rail, and then through the injectors to the engine pistons to start it. The car engine starts. A signal about the successful start and operation of the engine goes to the car computer. The vehicle's engine is running, and the fuel pump continues to function.

If the engine does not start for some reason, the car’s computer will also receive a signal about this, and the fuel pump will turn off.

For the smooth operation of an electric fuel pump, a number of rules must be followed. First, and most importantly, you need to keep the Gazelle fuel filter clean and do not forget to replace it during maintenance, especially if you are using fuel that is not of the best quality. In addition, on many modern cars the fine filter is built directly into the fuel pump.

Replacing such a filter is a rather labor-intensive operation (you have to remove the gas pump from the tank to replace the filter in it), but sometimes it is simply necessary to do this. And, secondly, you need to make sure that the gas tank is always more than one-third full. In this case, the pump is completely immersed in fuel. If you do not follow this simple rule, then there is a high probability that the electric pump may fail due to overheating.

Another type of fuel pump is a pump for pumping diesel fuel. Designed for pumping diesel from the tank of one car to the tank of another, or from a canister to a tank. There are restrictions on using the pump to transfer gasoline, as gasoline may ignite.

Why is a fuel pump needed?

The fuel pump or gasoline pump is designed, as we said above, to supply fuel from point “A” to point “B”. By point “A” we mean the reservoir, that is, the tank in which the fuel is located, by point “B” we mean the engine into which the fuel is supplied. After supply, the fuel was mixed, roughly speaking, prepared “for use.” The fuel supply is regulated by the pressure maintained by the fuel pump reducer; the correct pressure in the fuel pump is a very important point. Modern fuel pumps come in two types - mechanical and electric, they differ in the type of drive: the first operates due to the constant movement of the drive lever up and down, and the second is equipped with an electric motor and a mini-pump, this tandem is powered from the mains and produces an uninterrupted supply of fuel into the engine. The first, mechanical type of fuel pumps is quite difficult to find today, so we will not go into details of its operation and other details. Instead, we will talk about malfunctions of electric fuel pumps.

Signs of a faulty fuel pump

• Perhaps the most common symptom by which a malfunction of the fuel pump can be determined is jerking while the car is moving .
• The second most popular symptom indicating a faulty fuel pump is floating idle speed.
• Poor engine starting or no such possibility at all can often indicate that the fuel pump requires replacement.
• Deterioration in dynamics, that is, when you “push to the floor” and the car either jerks or does not react at all to the position of the pedal.

Note: It is important to note that all of the above-described signs of a fuel pump malfunction can be caused by other engine parts, so it is impossible to judge by just one symptom that the fuel pump needs to be replaced. For example, the speed may fluctuate due to problems with the mass air flow sensor or air metering sensor, because the fuel is of poor quality or the injectors need to be cleaned.

Fuel pump relay ZMZ 406 injector

Auto GAZ 31105, 406 engine, injector, 2001. Suddenly, after the trip, the next day the car wouldn’t start! You turn the ignition key, but the pump is silent. The car won't start!

It was checked:

1. Fuel pump - working 2. Fuel pump relay - OK 3. Fuel pump operation when the contacts of the fuel pump relay are closed - the fuel pump is working 4. Fuse - intact 5. Presence of gasoline in the tank - yes 6. No additional lights with errors light up 7. Checked 4- x contact relays in the passenger compartment in the driver’s feet are operational

that when the ignition is turned on, there is a plus on contact 85 of the fuel pump relay, but there is no minus on 86. Visually, all the wires from the fuel pump-driver-hood are intact. All that remains is to get to the block under the glove compartment. What is there? As I understand it, the wire (c/w) from the relay goes to some kind of large connector or directly to the brains under the dashboard. Is it so?

Help me please!

Has anyone encountered a similar problem?

This is my father-in-law's car and he lives far from the regional center. Due to the fact that this is the Kaliningrad region and there is a minimum of domestic cars, finding a specialist is a problem.

If I posted this in the wrong thread, I'm sorry. This is my first post! Please, dear admins, don’t kick too hard!

I read the topic on electrics, but so far I haven’t found anything similar!

Electrical diagrams of GAZ-3110 "Volga"

(clickable)

(clickable)

Protected vehicle circuits

Color coding of flat blade fuses:

Under the hood, on the left mudguard there is a block of two fuses for 30A and 60A.

30A - protection circuit of the electric cooling fan, 60A - all other circuits except the starter. But the starter relay contacts are protected. See diagram.

Cars considered are Gazelle 3302 (Gaz 3302), Gazelle 2705 (Gaz 2705) with old and new fuse blocks, equipped with ZMZ 402, ZMZ 405 and ZMZ 406 engines 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2 002 , 2003. 2004, 2005, 2006, 2007, 2008, 2009.

fuses gazelle injector, carburetor.

The old style fuse box is located on the left under the instrument panel.

Layout of fuses in the block Gazelle 3302 (Gazelle 3302) and Gazelle 2705 (Gazelle 2705) of the old model.

Upper block fuses

Electric motor of the heater, electric pump of the heating system (vehicles with two rows of seats)

Reserve for auxiliary heater motor (vehicles with two rows of seats)

Instrument cluster, parking brake warning lamp switch, EPH system, windshield wiper relay, reversing lamps in the rear lights, diagnostic warning lamp (engines of the ZMZ-406 family)

Buzzer and lamp for onboard platform lighting, brake lamps

Windshield wiper and washer motors

cigarette lighter, horn, portable lamp sockets

Lower block fuses

Cabin lamp, engine compartment lamp, cargo compartment lamp

instrument cluster illumination lamps

Rear fog lights

Lamps for the right front and left rear side lights, license plate lights, indicator light for turning on the side lights

Left front and right rear side lamps

low beam left headlight

Low beam of the right headlight, electric headlight corrector

high beam of the left headlight, indicator lamp for turning on the high beam of headlights

High beam right headlight

Fuse box of the new type Gas 3302 (Gazelle 3302) and Gazelle 2705 (Gaz 2705).

Located on the left under the instrument panel cover.

To access the fuses, press the latch and remove the block cover.

diagram of the location of fuses in the block of the new model.

Upper block fuses

engine control system (engines ZMZ-40522, ZMZ-40524)

Radio equipment, ground switch (GAZ-3221 cars and modifications)

Windshield wiper and washer motors

Low Beam Relay, Anti-Lock Brake System (ABS)

cigarette lighter, beeps

Horn relay, instrument cluster, clock

Electric motor for additional heater, electric heating pump (vehicles with two rows of seats)

Instrument cluster, reverse lights, speed sensor, wiper relay

oxygen concentration sensor (engines ZMZ-40522, ZMZ-40524)

Engine control system (engines ZMZ-40522, ZMZ-40524)

The fuel pump does not pump: causes and diagnostics

Let's start with the fact that if the gas tank is full, the battery is charged, the spark plugs are dry and there is a spark, the starter turns the engine normally, but the engine does not seize, then you should pay attention to the gas pump. A common problem is that there is no power to the fuel pump after the ignition is turned on. In a similar way, the malfunction manifests itself in motion, when the power to the fuel pump is lost and the engine suddenly stalls.

An equally important point is how much the fuel pump pumps. In other words, the pump may hum and buzz (power is being supplied), but not create the required pressure in the fuel line. The pressure in the fuel system with a working fuel pump must be more than 3 bar (which depends on the specific car model). The indicated pressure is accumulated in the fuel rail and has an indicator of 300 kPa and above.

To check, you need to measure the pressure in the fuel rail with a pressure gauge, taking into account the indicators that are the norm for a specific car model. Using the example of injection VAZs, the pressure when the ignition is turned on is 3 atmospheres, at idle the figure is 2.5 atmospheres, when you press the gas 2.5-3 atmospheres. This method will help you accurately determine:

• malfunction of the fuel pressure regulator in the rail;
• breakdown of the fuel pump or a noticeable decrease in its performance due to wear;
• severe contamination of filters (fuel filter and/or fuel pump mesh);

How to check the fuel pump?

• If the fuse is good, check the voltage at the pump. Before doing this, make sure the battery is in good condition. Check the voltage at the fuel pump terminals with a multimeter or tester; check in the operating manual what it should be.
• Check with a tester whether voltage is supplied to the fuse; often a break in the electrical circuit occurs in this place.
• Next, if the search does not yield results, check the voltage on the wires themselves. Make sure there are no losses and they are properly connected to ground. If the voltage drops by more than 1 V, the failure most likely lies in oxidized contacts or wiring. Make sure there is no short circuit in the wiring.
• If during this test you do not find any violations, you should look for the problem in the fuel pump itself; it may be faulty and requires replacement. But, as practice shows, replacement is a last resort; first you need to try to restore the fuel pump and conduct another test, in which it is worth measuring the pressure. Read how to check the pressure in the fuel rail here.
• If the engine stalls while driving, the reason may lie in the electrical part; to refute or confirm the assumption, you should check the fuel pump relay. To do this, we connect a control unit to the fuel pump connector, turn on the ignition, and observe the behavior of the light bulb; if it lights up for a couple of seconds, the reason is clearly different.
• Problems and malfunctions of the fuel pump can be eliminated with the help of special repair kits; they are purchased at a car dealership or from dealers. If necessary, change: diaphragm, valves, gaskets, and filter.

Checking with a pressure gauge

It is also possible to check the performance with a pressure gauge. This method is also quite accurate if you check the fuel pump correctly. We will need a special pressure gauge to measure the pressure in the fuel network of the GAZelle 405 injector. You can do all the operations yourself; you don’t need the help of specialists. The instructions for such a pressure gauge say that it must be connected to the injector rail and secured so that the pressure gauge readings can be seen from the passenger compartment. When the driver turns on the ignition, the pressure gauge starts working and takes readings of the pressure created by the fuel pump. The norm for pressure fluctuations in the fuel system of the GAZelle 405 injector is from 300 to 380 kPa (kilo Pascal). After this, you need to drive along such a section of the road that at least third gear is engaged and then measure again. If the pressure gauge readings have not changed, then there is no need to worry about anything yet, and something else needs to be repaired, not the fuel pump.

If there are significant changes in the readings, you will have to contact a GAZelle 405 injector repair specialist.

If the car starts to stall while driving, then the problem lies in the electrical component. You can check if this is why the fuel pump is not working correctly by performing a test of the fuel pump relay. To do this, we need a regular control lamp, and the test itself looks like this: when the lamp is connected to the yardarm and the ignition is turned on, the lamp should light up for a few seconds. If a leak was noticed at low pressure and it was determined that it was the culprit, then it needs to be eliminated. To do this, you need to establish where exactly the leak is, and then, depending on the situation, choose what will help - replacing some gaskets, valves, diaphragms and other things. In order to quickly understand what exactly is broken and how best to fix the breakdown, it is necessary to clearly understand the diagram of the fuel equipment of a particular machine, and what place the fuel pump occupies in it.

January 9, 2013, 15:48 #1 123

Good afternoon everyone. Evening is already approaching, and in the morning I can’t start the gas 3110 d406i yesterday, but today it’s silent when starting (the gas pump doesn’t work), the fuse is intact, the relay contacts were cleaned, they tried connecting directly to the relay socket. The gasoline pump connected to the battery works. What could be the problem?

• Posts: 95
• From: Moscow Region, Chekhov

January 10, 2013, 21:37 #2 123

is there an alarm?

• Posts: 95
• From: Moscow Region, Chekhov

How to check the fuel pump?

• If the fuse is good, check the voltage at the pump. Before doing this, make sure the battery is in good condition. Check the voltage at the fuel pump terminals with a multimeter or tester; check in the operating manual what it should be.
• Check with a tester whether voltage is supplied to the fuse; often a break in the electrical circuit occurs in this place.
• Next, if the search does not yield results, check the voltage on the wires themselves. Make sure there are no losses and they are properly connected to ground. If the voltage drops by more than 1 V, the failure most likely lies in oxidized contacts or wiring. Make sure there is no short circuit in the wiring.
• If during this test you do not find any violations, you should look for the problem in the fuel pump itself; it may be faulty and requires replacement. But, as practice shows, replacement is a last resort; first you need to try to restore the fuel pump and conduct another test, in which it is worth measuring the pressure. Read how to check the pressure in the fuel rail here.
• If the engine stalls while driving, the reason may lie in the electrical part; to refute or confirm the assumption, you should check the fuel pump relay. To do this, we connect a control unit to the fuel pump connector, turn on the ignition, and observe the behavior of the light bulb; if it lights up for a couple of seconds, the reason is clearly different.
• Problems and malfunctions of the fuel pump can be eliminated with the help of special repair kits; they are purchased at a car dealership or from dealers. If necessary, change: diaphragm, valves, gaskets, and filter.

For greater clarity, we recommend watching a video on how to check the fuel pump in a garage:

Source: Question Auto - car advice website .

The heart of a car is often called the engine, because it is very important for a car, just as the heart is for a person; you can often hear in conversation how the human heart is called an “engine”.
However, if we go a little deeper and draw some parallels, then it would be more correct to call a fuel pump a heart, since, like the heart, it pumps liquid, it also has its own line of “vessels and veins” through which fuel is supplied to the “vital organs” ICE. The fuel pump is the topic of our article today, in which we will try to tell you what a fuel pump is, how it works, its main faults, and also how to check the fuel pump at home, that is, with your own hands.

Power check

You can establish the presence of voltage at the TN connector using a simple test to check electrical circuits. To check the fuel pump, in the electrical diagrams for your car model, find the pinout of the electrical connector of the fuel module. For the pump motor to operate, “–” and “+” are required. If, after turning on the ignition and connecting the control contacts to the corresponding pins of the block, the light comes on, then everything is in order with the supply voltage. Using this method, you can check for the presence of +12V and ground in the fuel pump relay connector, and establish the presence of supply voltage from the ECM to the relay. If the fuel pump does not turn on, but there are no problems with the components of the electrical circuit, the reason is in the fuel pump itself.

The most convenient way to determine why there is no power to the fuel pump is to use a multimeter. Let's say that + 12V to the pump comes from the relay, but does not reach the fuel module connector. In this case, it is necessary to ring the wires from the relay to the fuel section. In ohmmeter mode, you will not only find an open, but you will also be able to see the parasitic resistance in the circuit. When considering possible reasons why the fuel pump does not pump, do not forget about the immobilizer failure. Often in such cases the engine starts, but stalls after a few seconds.

Tips for motorists

In the operation of the submersible electric fuel pump on a Gazelle car, the following take part: the main relay, the fuel pump relay, the electronic control unit, and fuses protect this electrical circuit. In addition, if the car has an anti-theft system installed, then another relay will be added to the circuit, which will cut off the voltage supply to the fuel pump terminals.

And those Gazelle cars that run on gas will still start on gasoline and in their electrical circuit of the fuel pump, an additional relay will also be installed that will turn off the operation of the fuel pump at the moment the engine switches to gas.

Therefore, when troubleshooting problems associated with a non-working gas pump on a Gazelle, you need to start by checking the integrity of the fuses . You also need to check the condition of the contacts for oxidation. Next, we check the operation of all relays that are used on this vehicle in the electrical circuit for supplying voltage to the fuel pump terminals. If this does not help, then you will have to check the wiring and connections from the electronic control unit to the main relay and the fuel pump relay.

Another common cause of fuel pump failure is oxidation or burning of the negative contact located on the fuel pump inside the tank. There is a white block there, but please do not confuse it with the block that is located on the surface of the gas tank. Typically, this malfunction initially manifests itself by periodically turning the fuel pump on and off. If this problem occurs, then these contacts will have to be periodically cleaned by removing the module or connected directly once and for all, bypassing the terminal.

Unfortunately, the driver is not always able to independently find faults associated with the failure of the submersible fuel pump on a Gazelle car and has to look for a competent auto electrician to solve this problem.

Author kras679, March 26, 2022 in Section on ZMZ-405.22

Pump diagnostics and repair

The importance of maintaining the fuel pump in a constant working condition is that if it does not work correctly, constant breakdowns of other components of the GAZelle 405 car will begin, and the injector may not work correctly or even fail.

You need to start repairing the fuel pump by determining what exactly the problem is, that is, diagnosing it. The first alarm bell that the fuel pump is not working properly is that the GAZelle 405 injector moves unevenly, as if in jerks. If this particular symptom appears, then do not be discouraged - repairs are possible on your own. Also, if the GAZelle 405 engine takes a long time to start, and the injector usually always starts with half a turn, this is another bad sign that the fuel pump is starting to fail, although it is still far from complete failure.

Although, if you do not repair the fuel pump for a long time and do not pay attention to such a breakdown, then at one point the car may simply not start. The cause of this problem is a drop in pressure in the fuel system, which is caused by a faulty fuel pump.

You can check the fuel pump using a special indicator, which can be bought at any spare parts store for the GAZelle 405 injector. This device is installed on the gas pump and you can do it yourself, the main thing is to strictly follow the instructions and not make mistakes. The check takes place with the engine turned off; the device itself will do everything. If a significant decrease in pressure in the fuel network was noticed in less than 10 minutes, this means that the fuel pump is working properly, and either the pressure regulator or the injectors of the GAZelle 405 injector are to blame.

Why is a fuel pump needed?

The fuel pump or gasoline pump is designed, as we said above, to supply fuel from point “A” to point “B”. By point “A” we mean the reservoir, that is, the tank in which the fuel is located, by point “B” we mean the engine into which the fuel is supplied. After supply, the fuel was mixed, roughly speaking, prepared “for use.” The fuel supply is regulated by the pressure maintained by the fuel pump reducer; the correct pressure in the fuel pump is a very important point. Modern fuel pumps come in two types - mechanical and electric, they differ in the type of drive: the first operates due to the constant movement of the drive lever up and down, and the second is equipped with an electric motor and a mini-pump, this tandem is powered from the mains and produces an uninterrupted supply of fuel into the engine. The first, mechanical type of fuel pumps is quite difficult to find today, so we will not go into details of its operation and other details. Instead, we will talk about malfunctions of electric fuel pumps.

Signs of a faulty fuel pump

• Perhaps the most common symptom by which a malfunction of the fuel pump can be determined is jerking while the car is moving .
• The second most popular symptom indicating a faulty fuel pump is floating idle speed.
• Poor engine starting or no such possibility at all can often indicate that the fuel pump requires replacement.
• Deterioration in dynamics, that is, when you “push to the floor” and the car either jerks or does not react at all to the position of the pedal.

Note: It is important to note that all of the above-described signs of a fuel pump malfunction can be caused by other engine parts, so it is impossible to judge by just one symptom that the fuel pump needs to be replaced. For example, the speed may fluctuate due to problems with the mass air flow sensor or air metering sensor, because the fuel is of poor quality or the injectors need to be cleaned.

Pump diagnostics and repair

The importance of maintaining the fuel pump in a constant working condition is that if it does not work correctly, constant breakdowns of other components of the GAZelle 405 car will begin, and the injector may not work correctly or even fail.

You need to start repairing the fuel pump by determining what exactly the problem is, that is, diagnosing it. The first alarm bell that the fuel pump is not working properly is that the GAZelle 405 injector moves unevenly, as if in jerks. If this particular symptom appears, then do not be discouraged - repairs are possible on your own. Also, if the GAZelle 405 engine takes a long time to start, and the injector usually always starts with half a turn, this is another bad sign that the fuel pump is starting to fail, although it is still far from complete failure.

Although, if you do not repair the fuel pump for a long time and do not pay attention to such a breakdown, then at one point the car may simply not start. The cause of this problem is a drop in pressure in the fuel system, which is caused by a faulty fuel pump.

You can check the fuel pump using a special indicator, which can be bought at any spare parts store for the GAZelle 405 injector. This device is installed on the gas pump and you can do it yourself, the main thing is to strictly follow the instructions and not make mistakes. The check takes place with the engine turned off; the device itself will do everything. If a significant decrease in pressure in the fuel network was noticed in less than 10 minutes, this means that the fuel pump is working properly, and either the pressure regulator or the injectors of the GAZelle 405 injector are to blame.

Checking the fuel pump of a carburetor car (mechanical)

Mechanical fuel pump - diagram

To check the operation of the fuel pump, you should:

1. Remove the fuel hose from the carburetor inlet fitting.
2. Immerse the hose in a specially prepared transparent bottle. By actively using the pumping lever manually, we notice how strong and dense the fuel is supplied. Air impurities should not be visually noticeable.

Delayed jet output is not a sign of a breakdown, especially if the car has been parked for a long time. As a rule, diaphragms eight and nine are the main cause of malfunction.

Be that as it may, you need to inspect both the strainer and the inlet/outlet valve.

Even if the gaskets are replaced, fuel may leak. In this case, the problem lies in the tightness of the fuel pump housing due to deformation during repairs.

Let's summarize:

The causes of fuel pump problems, both electrical and mechanical, are varied, and the need to find/fix a breakdown may take you by surprise along the way. By following the above recommendations, you will be able to independently carry out the entire necessary set of measures to diagnose this device. And you should start with the power supply (if it is an electric fuel pump) and the operation of the diaphragm when checking a mechanical fuel pump. Very often, the unstable operation of a fuel pump is not due to its breakdown, but to related parts - a filter, check valve or injectors.

Zavolzhsky Motor Plant (ZMZ) is one of the first domestic manufacturers of automobile engines to begin producing engines with an injection power system. One such high-quality engine can be called the ZMZ 405 - an engine from a family of four-cylinder engines that have been produced for almost 15 years. For the first time, this particular engine hit the market back in 2000, installed on the GAZ-3111 car. The plant itself positions the engine as an engine for small trucks and minibuses. It is installed on them - various cars of the GAZelle and Sobol injector line have this engine.

Over the past time, the ZMZ 405 has established itself as an excellent, unpretentious engine, ready for even the greatest difficulties on the road. The 405 motor is capable of withstanding heavy loads and this will not affect its service life. Also, the design of the motor is based on the unprecedented simplicity of the device - this engine, installed on any car, can be repaired and maintained by anyone in an ordinary garage with minimal knowledge, everything is done according to the included book and does not raise any questions. The same applies to fuel system repairs. In particular, the engine fuel pump injector is very easy to repair yourself.

Repair

Mechanical fuel pump repair

Repairing a mechanical fuel pump consists of installing a new repair kit (diaphragm and valves) and, if necessary, a worn pusher with a spring. A deeper repair of this device is impractical, since the costs of purchasing and repairing worn parts are close to the cost of a new product. If the pump housing is deformed or damaged, it must be completely replaced.

Electric fuel pump repair

The electric fuel pump is equipped with a non-separable housing, and if it breaks down, the product is replaced with a new one. Without special skills, equipment and spare parts, opening and repairing it is impossible. But some workshops undertake similar work, the price of which is lower than buying a new pump. The main failures of the device are as follows:

1. Damage to brushes and motor commutator. Repair involves replacing them with new ones.
2. Breakage of the plastic coupling connecting the rotor and the motor armature shaft. The clutch is replaced with a new one.
3. Anchor failure. The repair involves rewinding this part.

The described actions allow us to eliminate the gas pump malfunction on all models of the VAZ: 2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2109, 21099, 2110, 2111, 2112, 2113, 2114, Niva, Priora, Kalina, Grant, Vesta and most foreign cars.

Causes of failure

If you are the owner of a Gazelle car, then the electrical circuit diagram will be useful to you in any case. At a minimum, so that, if necessary, it is possible to detect certain breakdowns caused by the use of low-quality fuel.

The reason for the inoperability of electrical appliances can be extreme climatic conditions:

1. Difficult climatic conditions include severe cold. When frost sets in, the load on the electrical circuit of the vehicle increases, and the type of engine - carburetor or injector - does not matter here. The load on electrical equipment is especially noticeable during the morning start of the engine.
2. Regardless of the time of year and type of internal combustion engine, every driver may encounter interruptions in the functioning of the injection system. When using low-quality gasoline or diesel, malfunctions in the ignition system of the combustible mixture may occur. To prevent such problems, it is necessary to use high-quality fuel.
3. A Gazelle car owner may encounter other types of breakdowns and malfunctions. This may include short circuits, detachment of contacts on devices, or corrosion. All these shortcomings are caused by poor build quality or improper car repairs.

The fuel pump relay does not turn on.

If the fuel pump does not work, then first of all you need to check the attraction of the main relay and the fuel pump relay. If the main relay does not click, then it is necessary to check its switching circuit and its serviceability. How to do this is described in the article the main relay does not turn on,

In the case when the main relay turns on, but the fuel pump relay does not, it is necessary to check the power at pins 85 and 86. When using a test lamp, its current consumption should not exceed 0.25A, otherwise damage to the controller may occur. If the control lamp does not light up on any terminal, then the relay is not receiving power. This may be caused by a blown fuse or a broken power cord.

In the case when the lamp burns brightly on one terminal, and at half-glow on the second, and the relay may be activated, you should remove the relay from the socket and connect terminals 85 and 86 with a test lamp. When the ignition is turned on, the control lamp should light up and go out after approximately 20 - 30 seconds. If the lamp lights up and there is poor contact in the connection between the block and the fuel pump relay. If the lamp does not light up, there may be a break in the wire connecting the relay to the controller or the controller itself may be faulty.

Malfunctions and their elimination

Like any technical product, the Gazelle-Business motor is susceptible to breakdowns. Sometimes it needs repairs for various reasons. The most common problems that arise are:

1. The motor does not start. Most likely there is no fuel supply to the injectors. It is necessary to use the appropriate fuel, rinse and clean the fuel intake.
2. The tightness of the pipeline between the tank and the electric pump is broken. The connection points should be checked and the tightness restored.
3. There are problems with the control electronics. It is necessary to replace faulty parts of the unit.
4. Poor power delivery indicates problems in the electronic control system. After testing, it is necessary to replace the unusable element.
5. The fine filter is clogged. In this case, the filter element must be replaced.
6. Air appears in the fuel block. It is necessary to check and ensure the tightness of the system.
7. If problems are detected in the fuel pump, the faulty injectors should be replaced.

Fuel pressure measuring device

As mentioned above, the operation of the fuel pump is checked with a special device - a pressure gauge. The most common MP is 100 produced by NTS LLC. We have been using it in our service since 2008, the accuracy of the readings has remained at the factory level. The kit includes adapters and a pressure relief valve.

Pressure gauge MP - 100

Allows you to measure fuel pressure both in the rail if there is a fitting, and anywhere in the fuel line. The set with the pressure gauge includes adapters:

UP-2 adapter extension allows you to take measurements on rear-wheel drive classics.

TPB-2 adapter for quick-release connectors.

Allows you to easily measure pressure on most modern cars.

There are many similar testers for checking fuel pressure. The differences are in price, size, dial. Structurally, all meters are similar. You can make a pressure gauge with your own hands, but the price is not worth it. It is much easier and more effective to contact diagnosticians or any service. They will draw a conclusion and fix the problem.

Types of power units

The manufacturer of Gazelles business diesel, 402, 405, 406, 2705, 3302 and other models is the Gorky Automobile Plant.

Initially, two types of engines were used in the production and assembly of vehicles:

• carburetor engines produced at UMP;
• injection and carburetor engines supplied by ZMZ (Zavolzhsk enterprise).

The essence of this approach was to modernize and unify power units for business diesel models, 402, 405, 406, 2705, 3302 and others with UAZ and Volga vehicles. Of course, in the case of trucks, the electrical circuit diagram was redone.

For certain types of motors, different schemes were used:

1. In vehicles with an internal combustion engine injector, the operation of the fuel mixture ignition system was initially more demanding in terms of operation. Such units were equipped with electronic ignition elements and injection control units. Of course, in such units the quality of the fuel plays an important role.
2. As for carburetors, such options are considered more traditional today, but they also have certain features. Of course, the wiring diagram in carburetor engines is different from injectors.

In addition to the main models 402, 405, 406, 2705, 3302 and others, since 2001 the manufacturer began to produce a version called “business diesel”. In the case of a diesel engine, the wiring diagram has also undergone certain changes. In particular, such vehicles began to be equipped with a more powerful starter, battery, and generator (video author - MR. BORODA).

General information

The electrical wiring diagram in a GAZ car with a carburetor or injector engine consists of many components.

And it doesn’t matter whether it’s Gazelle 402, 405, 406, 3302, 2705, Business or Euro, the electrical circuit will include the following subsystems:

1. Ignition system. This unit consists of different components, the main ones being the switchgear, spark plugs, and those that transmit the charge. The functionality of the engine and its operation in principle depend on the performance of this system.
2. Optical system. It includes all external headlights, from headlights to brake lights and fog lights.
3. Lighting in the car interior, including on the dashboard.
4. Electronic (depending on the car model).
5. Windshield cleaning system, which includes an electric motor and.
6. A fuel system, one of the main components of which is the pump.
7. and a generator unit.
8. Audio system, if available, etc.