Removing the fuel tank. VAZ 21213, 21214 (Niva)

What is the essence of this system

Kalina's automatic fault diagnosis system includes several devices.
The display displays information that is processed by all devices. To prevent car owners from having to independently service their cars, manufacturers do not try to talk about the location of the devices and their decoding. It should also be borne in mind that the information received from the automatic diagnostic system is processed by the on-board computer, which simplifies the repair of the automotive unit, since the owners have the opportunity to visually find out where the defect is detected.

Since the Lada Kalina does not have an on-board computer, the owner will only be able to visually familiarize himself with the code number, and he will have to guess the location of the breakdown on his own. In order to avoid mistakes when repairing your car, experts recommend knowing each code by heart in order to promptly eliminate any type of malfunction.

Chevrolet Niva fuel pump fuse

The operation of a Chevrolet Niva car engine is impossible without a fuel pump. If one day the car simply does not start, then do not rush to get upset, perhaps the breakdown is minor and it takes five minutes to fix it. The main thing is to determine the cause and try to eliminate it. The reasons for the failure of the fuel pump will be discussed in this article.

If earlier Niva cars were produced with carburetor engines, then the modern Shniva is equipped with a fuel injection system. This means that fuel is supplied from the tank to the injector via a fuel pump, which operates on a 12V DC voltage. On carburetor engines, fuel pumps operate through mechanical action. But since the Chevrolet Niva is equipped only with an electrical device, then we will talk about it accordingly.

Location of the fuel pump in Shniva

So, the function of supplying fuel from the gas tank to the injection system is determined using an electric fuel pump. It sucks fuel from the tank and delivers it through a supply system consisting of tubes to the intake manifold of the injection system. If you imagine for a second that the download device is not working. In this case, the driver simply will not be able to start the engine, because the fuel pump initially starts and pumps fuel to the injector, and if it does not work, then it is impossible to start the engine.

The fuel pump is powered by electricity and therefore the electronic system of the car is responsible for its operation. When the ignition key is turned to the ignition on position, a signal in the form of electrical voltage is sent to the fuel pump, which is controlled by the on-board computer.

There is an electric motor inside the pump, which begins to rotate and create pressure in the system. After this, the ignition key is turned to the engine start position, after which it starts.

But if the driver does not turn the key to the “start” position, then after two seconds the gas pump stops pumping fuel so as not to create critical pressure in the system.

What is included in the fuel pump power system?

Two wires “+” and “ground” are connected to the device itself, which provide the actual 12V power supply. But before this power is supplied, the following parts are installed in front of the pump to ensure its correct functioning. These details include:

relay;
on-board computer consisting of a board with controllers;
fuse.

The relay itself is designed for switching large currents. That is, the fuel pump consumes a lot of current, especially during startup, and the wiring and electronics cannot withstand such currents and will instantly burn out. The relay is triggered by a pulse of small currents within itself and closes more powerful contacts. As a result, the device starts up. Judging from this, we can conclude that a malfunction of the relay will lead to disruption and inoperability of the fuel supply system in the Chevrolet Niva.

The pump power relay in the Chevrolet Niva is located inside the car under the glove compartment. There are four types of relays located there, responsible for different circuit closure nodes. The relay of our device is the third in a row. Nearby there are fuses, which will be discussed further. Replacing the relay is quite simple: unscrew the mount and pull out the relay, after which a new one is installed in its place.

The functionality of the relay is checked by operating the pump.

Fuse and its role in electrical circuits

Actually, we smoothly approached our main topic of the article - “fuel supply circuit fuse”. It is designed to protect the electrical circuit of the pump. The main function is protection, which consists of breaking the circuit when large currents, surges or thermal overloads occur.

All these phenomena can occur unpredictably, since a failed relay can supply a large current through the wiring or to the controller, which will disable them. And repairing an on-board computer is very expensive, so the only way out is to try to get rid of such unpredictable situations through constant monitoring.

The main parts and components that may be damaged if the fuse fails:

On-board computer;
Directly the electrical power supply circuit of the pump, consisting of wiring;
Fuel supply device;

As you can see, it plays a very important role in the car and is an important element responsible for the proper operation of the electric fuel pump.

What does the fuse consist of?

Each car model uses different types of fuses, but the Chevrolet Niva has the types shown in the photo.

Contact thread

Its design is very simple, consisting only of two aluminum contacts and a special plastic shell that does not catch fire or smoke when melted. If high temperatures act on the plastic of the fuse, it simply melts. There is a chamber inside it, and in it there is a connecting contact thread, which performs that very protective function. The contact thread is made of aluminum, and its thickness depends on the current for which the fuse is designed. It is marked “15A”, which means it can withstand currents of constant amplitude up to 15A.

Possible error codes for viburnum

What error codes exist for VAZ Kalina?

The highest voltage on-board network of the machine.
Fuel sensor error (for example, within 20 seconds it was detected that the circuit was broken).
Coolant temperature sensor error.
The motor is overheated.
Oil pressure is in poor condition.
The brake system has broken down.
Battery low.

What should I do to troubleshoot? You should hold down the key and turn on the ignition, but do not start the car. The arrows on the dashboard will move and the lights will turn on. After this, you need to press one of the keys on the switch, which is located under the steering wheel. Then the arrows will be at the initial position, and errors will be shown on the display.

Let's give advice to those who buy a used VAZ car - most drivers don't even think about the fact that there is an option for diagnosing and resetting Lada Kalina errors.

And therefore, before buying a VAZ, you should run this option to find out everything about the past of the car you are purchasing.

The modern automotive industry is a very developed industry; it is almost always an excellent assistant to any car owner.

This does not depend on the make of the car; the presence of BC is an excellent feature of almost any car produced over the last ten years. A similar system is no exception for VAZ. Many people know what an on-board computer is, but not everyone knows how to evaluate errors that have occurred and determine their significance. Let's look at the above errors.

It should be noted that many of the errors characteristic of VAZ are understandable. For example, a temperature sensor error, the BC can issue it when the motor is cooled. But it happens that the computer gives an error falsely.

Also interesting: LADA (VAZ) 2121 (4×4), buy Niva 2022 in Moscow, photos and prices - official dealer

For example, once the motor was overheated, the computer suddenly notifies about the error, even if there is none. That is, errors can occur if the BC remembers information about an overheated motor.

And therefore, when this problem has been fixed, it is better to reset all BC readings.

And to fix it, you should press the Reset key - it is located under the control buttons of the on-board computer. But if the faults are not identified, you need to ask a professional for help. You should also pay special attention to the errors of the machine's bookkeeping system if it has already been used and was purchased secondhand.

Fuel filter on Niva Chevrolet - where is it installed and which one to choose?

The fuel filter on a Chevrolet Niva differs in size depending on engine size. Also, its location depends on the year of manufacture. The supplier of original spare parts for the conveyor is General Motors. Like most modern cars, in addition to the main one, the Chevrolet Niva also has a fuel pump filter (mesh filter).

Filter location

Features of choice

Replacement frequency

Replacement procedure

Where is the fuel filter located in a Chevrolet Niva

The fuel filter on all Niva Chevrolet trim levels is located separately from the pump. On pre-restyling and restyling modifications, the installation method is different.

Until 2006, the fuel filter on a car was located under the hood, in the engine compartment, on the passenger side.

After 2006, the fuel filter on the car was moved under the bottom of the car. Located near the rear right wheel, covered with a plastic casing. To change it, it is better to use an inspection hole.

Fuel filter for Niva Chevrolet - features of choice

The fuel filter on all Niva Chevrolet trim levels is located separately from the pump, and is removed from the fuel tank. The car can be equipped with one of two gasoline engines, differing in displacement: 1.7 liters (VAZ-2123) and 1.8 liters (manufactured by Opel). Depending on this, the manufacturer installs different fuel filters.

Article number Engine capacity Tube diameter, mm Height, mm Housing diameter, mm

GM 90353562	1.7	8	163	56
GM 25121074	1.8	8	160	55

Since both filters differ little in size, and are attached to all shnivy using a clamp, they can be interchangeable. Similar filters can be found under other article numbers - Lada 21230111701082, Opel 0818568 (for Corsa B, Omega B, Vectra B), Peugeot 156788 (for BOXER), VAG 6X0201511B (for BA3, Golf, Polo).

When replacing a fuel filter on a VAZ 21236, substitutes are most often chosen. The following are the most popular models. All engines have common analogues.

ManufacturerArticlePrice, rub.

MAHLE	KL 83	540
MANN	WK 512	420
SCT	ST 342	150
BOSCH	0450905969	350

BOSCH 0450905969

MAHLE KL 83

MANN WK 512

The fuel pump filter (coarse fuel mesh) differs in shape depending on the year of installation. Before 2006, it had the article number 21121139200 or 21101139200, after 2006 - 21101113920000 or 11181139200. According to driver reviews, they can be freely interchanged. A more convenient form is the filter mesh installed after 2006. Regardless of the year of manufacture of the car, it is installed on the fuel pump, which is located in the tank.

Which fuel filter is best for Niva Chevrolet

According to reviews from Chevrolet Niva owners, the best fuel filter is MANN (WK 512). It is not cheap, but it is capable of operating for more than 20 thousand km without any complaints. The most important thing is to replace it on time.

Also a worthy option is the MAHLE filter (KL 83), it has a larger filter element, which is why it often sells for more, but at the same time the resource is slightly shorter, more than 15 thousand km.

When to change the fuel filter on a Chevrolet Niva

The manufacturer recommends replacing the fuel filter on the Chevrolet Niva every 30 thousand km. According to the experience of many drivers, this should be done 2 times more often - every 15 thousand km. The fuel pump filter at each service station can simply be washed with carburetor cleaner.

You can tell when it’s time to replace the filter by the following signs:

Engine thrust decreases when climbing a mountain.
Fuel consumption increases significantly.
The engine begins to operate unstably (intermittently) at high speeds.
The engine does not start on the first try.

Connection features

The first thing you should arm yourself with is a high-quality wiring diagram for the Niva 21213. It is shown in the photo below. Firstly, such a diagram is useful for maintenance, and secondly, with its help it is easy to determine the location for connecting the wiring harness.

Factory color scheme of electrical equipment VAZ 21213

The second important point is the frequency of use of the chandelier:

Constantly, including traffic in urban environments;
Only when driving outside urban and suburban highways (off-road). And here a proven diagram is absolutely necessary for an off-road vehicle.

The chandelier control output can be connected to a standard switch

The most preferable is the removable option, which provides for quick installation and dismantling of the chandelier, as well as its safe connection to the standard electrical wiring. The video in the article clearly demonstrates this process. Connection instructions are presented above.

But what you should pay attention to is the adjustment of the light flux. The fact is that when driving off-road, the hood of a car is often covered with dirt, which in the dark glares in the headlights, blinding the driver.

Therefore, there are 2 options:

Install a special sun visor above the windshield;
Move the chandelier back so that the edge of the light stream does not fall on the hood of the car.

Proper installation of the chandelier prevents glare

Replacing the Chevrolet Niva fuel filter

Thanks to the general knowledge of the design, replacing the Chevrolet Niva fuel filter with your own hands can be done even by a novice car enthusiast. Let's consider both the procedure for replacing the fine fuel filter on 1.7 and 1.8 liter engines, and installing a new fuel pump mesh.

Choosing a fuel filter for a Chevrolet Niva

The fine fuel filter on the Chevrolet Niva is unified with many other GM models (Lacetti, Matiz, Nubira). Among the manufacturers with the best reputation are:

Bosch,
Knecht (KL83),
Mahle Original,
Mann-Filter (WK512).

How often should I replace it?

It is recommended to change the fine filter every 45 thousand km (in some sources - 30,000 km) or once every 3 years. Replacing the fuel pump mesh is not regulated, so it is done in case of clogging or for preventive purposes every 100 thousand km.

Clogged filter elements lead to a decrease in filter capacity, which can cause you to experience the following problems:

“sluggish” engine responses to pressing the accelerator pedal;
difficult starting the engine;
dips when pressing the gas pedal hard at low speeds. In particularly advanced cases, the engine begins to slow down and may even stall.

Power system design

Until 2006, a fine filter was installed in the engine compartment near the engine shield.

But on most Chevrolet Niva the TF is located near the tank under the bottom. In the absence of an inspection hole, from which it is most convenient to carry out work, the rear part must be fixed on stops in a raised state. The coarse fuel filtration mesh is an integral part of the fuel module and is located in the tank.

When purchasing, be careful, as there are 2 types of design: “rectangle with a cut side” and “sector of a circle” (installed on cars until 2006). For TF of this shape, there is a special molding at the bottom of the glass, so installing a rectangular filter element is undesirable.

The check valve in the fuel module prevents gasoline from draining into the tank after the engine is stopped, so a certain gasoline pressure is always maintained in the system. Before starting replacement, the pressure must be relieved. To do this, you need to start the engine, and then remove the fuel pump fuse. After working for some more time at the residual pressure, the engine will stall.

Using a 10mm socket, unscrew the plastic TF protection.

Disconnect the fuel inlet and outlet hoses (there will be 2 clips on the sides of the snap connections that need to be pressed into the connector when removed). Despite the lack of pressure in the line, some gasoline will flow out of the hoses.

Loosen the nut of the metal clamp tightening the bolt (if the nut is stuck, the bolt will most likely turn while turning, so in addition to a 10mm socket, you will also need a 10mm spanner).

Remove the old fuel pump from the clamp and pour the remaining gasoline in it into a container prepared in advance.

Install a new filter. Remember that the arrow on the filter housing indicates the direction of fuel flow. All that remains is to install the hoses until the connectors click and assemble the remaining elements in the reverse order of removal.

After replacing the fuel filter on your Chevrolet Niva yourself, turn on the ignition several times for 5-8 seconds so that the fuel pump fills the system with fuel before starting the engine for the first time.

Replacing the fuel pump mesh

Let's look at how to change the coarse filter yourself.

Raise the right rear seat cushion.
Unscrew the two screws securing the service hole plug.
Disconnect the power connector.
Clean the top cover and the contact areas of the thrust plate as thoroughly as possible from dirt and dust.
Disconnect the clamps and remove the fuel hoses.
Unscrew the 8 x 10 bolts and remove the metal plate holding the fuel module housing.
When removing the module, try not only to drain the gasoline from the glass as carefully as possible, but also not to damage the FLS float.
Assess the condition of the rubber gasket. A seal in satisfactory condition can be turned over during installation. If necessary, replace the gasket with a new one so that there is no depressurization of the tank in this place.
To begin disassembling the fuel module, disconnect the power supply chips.
Pull the fuel return pipe out of the groove.
Unclip the 4 plastic latches around the perimeter of the glass, then detach the glass from the top lid.

The fuel pump mesh sits tightly on the mounting fitting. There is another type of fuel module on the Chevrolet Niva. To replace the TF, just unfasten the glass. When installing a new filter element, the fuel pump must be held by hand.

Deciphering codes, checking devices

https://www.youtube.com/watch?v=3C757Ur_C8k

Mistake No. 2. Overvoltage.

Error No. 3. An error has been detected in the fuel sensor level; it occurs if the circuit is broken.

Error No. 4. Coolant temperature sensor error.

Error No. 5. The outside temperature sensor has failed.

Error No. 6. The motor has overheated. This happens if the engine overheating alarm is triggered.

Mistake No. 7. Oil pressure is in poor condition. Happens if the alert bell is triggered.

Mistake No. 8. Problems with the brakes. Happens if the alert bell is triggered.

Mistake #9: The battery is dead. Happens when the alert bell is triggered.

To reset all types of errors, press and hold the reset button until all data on the display is cleared.

Testing of devices and their combinations is carried out in accordance with technical specifications using special equipment (pulse generator, from a stable power source, etc.).

If a short circuit suddenly occurs in existing devices (less than 40-50 Ohms), the maximum temperature indication must prevail.

The devices operate from an electronic module, which receives signals from various sensors. The tachometer and speedometer are powered by stepper electric motors. The electrical instrument cluster cannot be repaired. The daily mileage of the car can be set on the 0 key, which is located on the right. The meter and its readings are saved when the battery is disconnected. That's all. Good luck!

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Replacing (removing) the fuel pump and fuel level sensor

(Replacing the fuel pump of a carburetor engine)

The submersible electric fuel pump module is installed in the fuel tank. It includes a turbine-type electric fuel pump, a fuel pressure regulator, a coarse filter and a fuel level sensor.

The tank should be no more than half full of fuel.

We carry out the work to clean the strainer, replace the fuel level indicator sensor, fuel pump and fuel module assembly.

Relieve the fuel pressure (see here).

Disconnect the negative cable from the battery.

The hatch in the fuel tank compartment lid does not allow removing the electric fuel pump...

...therefore it is necessary to remove the fuel tank cover. Remove the rear seat (see here). Bend the trunk trim forward.

Using the “7” head, we unscrew two self-tapping screws securing the fuel tank cover on the right and left (they simultaneously press the side panel trims),…

...five self-tapping screws along the front edge of the cover...

...and three in the back.

Slide forward and remove the fuel tank cover.

Disconnect the electric fuel pump connector by releasing the clamps

We mark the electric fuel pump tubes and fuel drain hoses with paint.

Holding the hose fitting with a 17mm wrench, unscrew the nut of the electric fuel pump drain pipe using a wrench of the same size.

Or (with a different design) ...

Press the hose tip lock...

...and remove the drain line hose from the fuel module cover tube. In this case, you must be prepared for the fact that a small amount of fuel will leak out of the hose.

First unscrew the nut at a small angle, releasing the fuel pressure.

We remove the hose.

The connection is sealed with a rubber ring, which we replace with a new one during assembly.

Similarly, disconnect the hose from the fuel supply tube of the electric fuel pump.

Using the “7” socket, unscrew the eight nuts securing the electric fuel pump to the fuel tank.

Raise the electric fuel pump and turn it clockwise...

...remove it from the tank, being careful not to damage the fuel level indicator float.

When removing and installing the module, be careful not to damage the fuel level sensor arm, which will lead to erroneous fuel level readings.

The connection is sealed with a rubber gasket.

We take out the centering plastic ring.

To prevent dirt or foreign objects from getting into the tank, cover it with polyethylene.

Fuel module assembly

We install the electric fuel pump (module) in the reverse order. We connect the tubes and hoses according to the marks.

To replace the pump itself, the pump strainer or the fuel sensor, we disassemble the fuel module

Signs of malfunction.

First of all, you need to try turning the ignition key and listen to whether the pump starts pumping fuel. If it is working properly, then when you turn the key you should hear a characteristic buzzing sound from the trunk. If there is a malfunction, the motor is silent and does not create the pressure in the system necessary for operation.

You can try to revive a faulty fuel pump. First of all, you need to remove the terminal from the battery. In some cases, the problem may be caused by a fault in the electronic control unit and a system reset will help get it working.

But such a development of events is quite rare. In most cases, resetting a terminal does not produce the desired results. And then you need to look for a fault. First you need to check the pump terminals. To do this, you will need a tester or test lamp. To check the fuel pump, you need to connect one probe of the tester to the car body - ground, and attach it to the terminals of the fuel pump. If the tester shows voltage, the pump is faulty and needs to be replaced. If there is no voltage, you need to look for a problem in the car's electrical wiring.

If the electric motor of the fuel pump is working properly, you need to check the relay responsible for its operation and the fuse. They are located under the glove compartment on the front panel. To check, you can use an adjacent relay on the board that has similar parameters. The fuse is used with a rating of 15 Amps. It is not recommended to use a part with a lower rating for testing, otherwise it will most likely burn out. Sometimes the contacts can simply become loose, so you can try rocking it and bending the legs.

In some cases, a faulty alarm relay can turn off the pump. It blocks the circuit, preventing thieves from stealing the car, but if it malfunctions, it can cause a shutdown.