Turning on the fan VAZ 2110 16 valves. How to turn on the cooling fan on the vaz. Video - connecting and checking VO

The delay in turning on the fan 2111 can be considered one of the many flaws in the design of this car. But, despite this, it is not difficult to solve this problem, however, like everyone else, it is important to have “straight hands” and to understand the device well.

Now about the problem of the late radiator. The optimum working temperature should not exceed 90°C. But on the VAZ 2111, additional cooling is turned on at a temperature of 100-105 ° C. Thus, we can say with certainty that the fan starts at the moment when it has already overheated. As you know, the operation of the engine at critical temperatures negatively affects its service life.

The solution to the existing problem can be the forced activation of the engine cooling radiator fan by installing a button in the mobile.

Before you start finalizing the VAZ, prepare the following components:

Power button

Instructions for finalizing the inclusion of a VAZ 2111 radiator fan

After forcibly turn on the cooling fan VAZ 2111 it is possible not only with the engine running, but also with the engine turned off at.

Many owners of the domestic "ten" complain that the VAZ 2110 cooling fan does not work for them. The problem is quite common, but to fix it it is not at all necessary to resort to the help of specialists, to pay a lot of money to car service masters for finding and eliminating the cause of the problem.

All this can be done by hand. Today we will tell you exactly how this is done.

Design

The cooling system consists of many components. Among the ones that interest us today, which can cause problems with the radiator fan, we note:

• Electric fan. This unit is put into operation when the temperature of the coolant reaches 100-105 degrees Celsius;
• Fan activation sensor. It is configured to work precisely in the range of specified temperatures. The sensor is located on the inlet pipe of the cylinder block (marking from the sensor factory - LS0112);
• Fuse marked F7. It is located in the mounting block;
• Relay fan. You will find this unit already in the cabin, under the right panel of the front console.

If the radiator fan does not work on your VAZ 2110, the cause of the malfunction should be sought precisely in the above elements of the system. Although there may be one situation in which the electrical circuit has nothing to do with the malfunction.

Safety valve

Knowing physics, you will agree that at normal atmospheric pressure, the water that is part of the antifreeze boils at a temperature of 100 degrees Celsius.

If the VAZ 2110 cooling fan fuse, that is, the valve located on the cover of the expansion tank, turns out to be faulty, and there is atmospheric pressure inside it, the cooling liquid will boil, but the fan will not be able to turn on even if the electrical circuit is working. This is because the fan switch on sensor on the injection VAZ 2110 has a switch-on temperature of more than 100 degrees Celsius.

To resolve this issue, you should replace expansion tank cap. The new element must maintain the pressure inside the system above atmospheric, which will allow the laws of physics to work, the boiling point to rise to 105 degrees Celsius and thereby turn on the blades of the unit.

Electrical circuit faults

If everything is fine with the tank cap, there are no pressure problems, then the causes of the radiator cooling malfunction should be sought in its electrical circuit.

1. The search begins with a check of the fuse marked F7.. To do this, you have to get to the mounting block. Check the quality of the contacts, the presence of traces of oxidation. If everything is good here, we move on. If the contacts are broken, just clean them, or just change the fuse. These are small financial costs.
2. The next place to check will be the VAZ 2110 fan switch-on sensor. You do not have to go to a specialized service station to check the efficiency of the sensor. This is done in garage conditions:
   1. Warm up the engine of your car to a mark above 100 degrees Celsius;
   2. Stop the engine, then start the engine again;
   3. Raise the hood and remove the terminal from the VAZ 2110 fan sensor;
   4. If, after removing the element, the fan starts spinning, then the unit is working properly, but there are problems with the sensor;
   5. When the cooling system fan does not turn on on the VAZ 2110 after the terminal is disconnected, the situation is the opposite - the fan does not work, and the sensor is in good condition.
3. Electric motor. It is possible that the radiator fan stopped working precisely because of a faulty electric motor. If all previous manipulations did not work, you will have to remove the electric motor. It can have several characteristic breakdowns:
   1. Collector brushes worn out;
   2. Collector brushes stuck;
   3. A short circuit has occurred on the armature winding (this can be determined by a characteristic unpleasant odor).
4. Relay. Maybe the button for turning on the cooling radiator fan on your VAZ 2110 simply failed. In this situation:
   1. The trim is removed on the right side of the console inside the cabin by unscrewing two self-tapping screws;
   2. There are three relays under the panel;
   3. The relay we are looking for is usually located at the end of the row in relation to the front of the machine;
   4. To play it safe, arm yourself with the instruction manual and check the wiring that goes to our enable relay;
   5. To fix the problem, install a new, functioning and good quality relay.

Constantly running fan

In some situations, the cooling fan may run continuously, regardless of whether the engine is cold or hot. In this case, there may be various causes, appropriate methods for checking the malfunction, as well as ways to solve the breakdown.

Alas, sometimes even after such thorough and detailed checks, the cooling system fan on the VAZ 2110 still does not turn on. In this case, the car owner has no choice but to contact the service station.

Proven and reliable car services will be able to conduct a full-fledged computer diagnostics of the cooling system, determine the causes of a non-working cooling fan. The problem can be much more global than a blown fuse.

Don't be afraid to turn to the experts, even if you consider yourself an experienced auto mechanic who has always solved the problems of his car on his own. Modern equipment, professional approach, computerization of car services - all this allows you to determine the causes of malfunctions in a short time, which, according to your old-fashioned method, would take several days. Auto services also have their advantages.

To ensure a safe and stable thermal regime of an internal combustion engine, a precise operation of the cooling system is required. The slightest failure will lead to overheating of the motor, which is fraught with burnout of the BC head gasket or failure of the elements of the piston group.

The radiator fan is one of the key components of the car's cooling system. Its role is to timely forced cooling of the liquid in the radiator. Problems with its inclusion are not uncommon for our machines.

In this article, we will talk about the possible reasons why the VAZ-2110 cooling fan does not work, and also consider options for eliminating them. But first, let's look at its design and how it works.

What is a radiator fan

Structurally, the radiator fan consists of:

• frame (frame);
• drive (electric motor);
• impellers.

An electric motor with an impeller on a shaft is mounted inside a rectangular metal frame, with which it is attached to the back of the radiator. When voltage (12 V) is applied to the drive contacts, it starts to work, rotating the blades and creating a directed air stream, which, in fact, cools the antifreeze or antifreeze.

Scheme of turning on the fan in carburetor and injection engines

The control of the forced airflow of the radiator in carburetor and injection engines VAZ-2110 is significantly different. First of all, the radiator located on the body is responsible for everything. It is set to a certain value. Usually it is 105-107 ° C. When the coolant is heated to this temperature, the sensor is triggered by sending a signal to the fan relay. It closes the electrical circuit, driving the motor.

Turning on the VAZ-2110 cooling fan with an injection motor is somewhat different. In engines equipped with an electronic control unit, there is no sensor on the radiator. Its place was taken by the thermostat located on the nozzle. When the coolant is heated to a temperature of 105-107 ° C, it sends a signal directly to the controller, which decides to turn on the fan. It transmits an electrical impulse to the relay, which turns on the electric drive.

Possible malfunctions

If the VAZ-2110 cooling fan does not work, do not rush to contact a car service. You can determine the cause of the malfunction yourself. Moreover, for this it is not at all necessary to have special skills.

The cooling fan may not turn on due to:

• malfunctions of the electric drive;
• faulty thermostat;
• a failed sensor for turning on the fan (temperature);
• faulty relay;
• breakage of electrical wiring;
• defective expansion tank cap.

Checking the fan drive

A common reason why the VAZ-2110 is a malfunction of its drive (electric motor). This may be brush wear, open or shorted windings, no contact in the connector, etc. It is not difficult to check the drive. To do this, just disconnect the fan from the car's electrical circuit, and connect it directly to the battery. If it does not turn on, the problem is definitely in it, but if the engine is running, the troubleshooting must be continued.

Fuse check

If the VAZ-2110 radiator cooling fan is working, the next step is to check the fuse. It is located in the engine compartment of the car and has the designation F7 (20 A). The check is performed using a car tester (multimeter) switched on in probe mode. If the test confirms that the fuse is not working, it must be replaced.

How to check the thermostat

The function of a thermostat in an internal combustion engine is to regulate the flow of coolant, directing it either in a small or large circle. While the engine is cold, its valve blocks the flow of coolant to the cooling radiator. This allows the engine to warm up faster.

When the coolant heats up, the thermostat valve opens, directing it to the radiator for cooling. If the valve sticks, the coolant constantly moves in a small circle, not reaching either the fan switch on sensor or the temperature sensor. In this case, the liquid may even boil, but the sensors, being unused in such a circuit, will not work.

Check the thermostat by determining the temperature of its nozzles to the touch. When the engine is warm, they must all be hot. If the pipe going from the thermostat to the cooling radiator is cold, the locking device is faulty.

How to check the sensor

One of the most common reasons why the VAZ-2110 cooling fan does not turn on is a non-working sensor for turning it on (for carburetor engines) or a temperature sensor (for injection engines). Consider ways to check them for different engines.

In a car with a carburetor engine, it is necessary to turn on the ignition and close the two wires leading to the sensor. The fan should turn on. If this does not happen, the problem is definitely not in the sensor.

For injection cars, it is necessary to warm up the engine to operating temperature, and disconnect the sensor connector by disconnecting it from the vehicle's on-board network. In this case, the controller must start the fan in emergency mode. The electronic unit perceives this as a failure in the cooling system, and forces the fan drive to work continuously. If the drive starts, the sensor is faulty.

Checking the cooling fan relay

The most difficult step in troubleshooting a fan is to determine the performance of its relay. It is possible to establish its serviceability at home only relatively. But you also need to know where the cooling fan relay is located.

And it is located in the additional mounting block of the center console. On the lower left side of the front passenger there is a plastic cover that covers the console. To open it, you need to unscrew the four screws. There are three relays under the cover. The far left is responsible for turning on the cooling fan. You can check it only by installing a known-good device in its place. After the engine warms up to the sensor response temperature, we are waiting for a characteristic click. If the cooling fan relay has failed, check the wiring.

How to check wiring

It is not difficult to find a broken conductor in the electrical circuit of a car on your own. It is necessary to check (ring) all the wires in the indicated sections with a tester.

For carbureted engines:

• from the switch-on sensor to the fan;
• from the fan to the mounting block (fuse);
• from the mounting block to the relay.

For injection engines:

• from the main relay to the fan enable relay;
• from the relay of inclusion to the fan and the controller;
• from the temperature sensor to the controller;
• from the fan to the mounting block (fuse).

If a break in the wiring is detected, it must be restored, as well as the possible cause of the circuit break must be established and eliminated.

Expansion tank cap

The last reason why the VAZ-2110 cooling fan does not work may be a malfunction of the expansion tank cap. The fact is that when the engine is running, a pressure above atmospheric pressure is created in the cooling system, so that the water that is part of the coolant does not boil at 100 ° C. The expansion tank cap valve is called upon to maintain the desired pressure. If it fails, the pressure in the system will be equal to atmospheric. This will cause the coolant to begin to boil already at 100 degrees. A sensor designed to turn on at a higher temperature, of course, will not work.

It is unlikely that it will be possible to check the operation of the cover at home, so if during a visual inspection you have any doubts about its performance, it is better to replace it immediately.

Probably, many have noticed that the temperature of turning on the fan on the engines of the latest generation VAZ 2110-2112 (100-105 C) is too high for the normal operating temperature of the engine (85-90 C).

First of all, this introduction is connected with the manufacturer's struggle for cleaner exhaust from the pipe of your car (requirements of modern Euro 3 and higher standards). At this temperature, more complete combustion of the fuel and its components occurs.

But it should be noted that, as always, a given positive side for one aspect brings something negative for another. So, with a slight, but still overheating of the engine and head, irreversible physical and chemical processes occur in the metal, which ultimately affects the overall final operation of the engine hours of the power unit. Apart from the fact that in the event of a failure of the electrical components that affect the switching on of the fan, the time to notice this at an overestimated temperature of the nominal switching on of 105 C to overheating of 125 C will be much less than from normal operation to overheating.

For more uniform and controlled operation of the engine, it is proposed to make a parallel circuit for switching on the fan. A positive contact is always connected to one of the fan contacts, and for the second negative contact, it is proposed to connect via a parallel wire with a switch according to Fig. 1.

Figure 1 Electrical circuit diagram for connecting a radiator fan VAZ 2110 2111 2112

Figure 2 Wire connection in the engine compartment to turn on the VAZ 21102 radiator fan

Figure 3 Alternative location for installing the radiator fan switch VAZ 2110 2111 2112

After the implementation of this solution, it remains only to mention the additional possibilities to control the operating temperature of the power unit with all the subsequent positive arguments given above.

PS Many, due to the prevailing conservative views, may have the idea that in the electrical circuit a relay is required to turn on the cooling fan. I am against excess and I can say that in order for the circuit to work, it is enough just to have a powerful switch rated for a current of at least 20 A for 12 Volts, that is, 240 watts (such switches are on sale - for example, 220 Volts 16 A, as in Figure 3, that is, at 3520 watts) This scheme has been successfully operating on a VAZ 21102 car, manufactured in 2001, for 3 years already. It should also be additionally noted that this method is not a replacement for the standard radiator fan operation circuit in a car and is intended only as an alternative solution for engine operation at lower temperatures controlled directly by the driver.

In any case, if the engine overheats, even if you have implemented the principle described above, still check the cooling system and ensure it is in full working order.

Emergency actions in case of overheating of the engine cooling system while driving.

At the first signs of overheating, if the arrow of the temperature gauge has gone into the red zone, but no clouds of steam escape from under the hood, turn on the maximum interior heating mode. This is necessary in order to reduce the temperature of the coolant in the engine cooling system.

Turn on the hazard warning lights, depress the clutch pedal and, using the momentum of the car, try to carefully move to the edge of the roadway and stop as far to the right as possible at the curb, and if possible, outside the roadway. Let the engine run for a couple of minutes at normal idle with the heater turned on at full power, do not immediately stop the engine. Open the hood and inspect the engine compartment.

After the overheated engine stops, local overheating of the coolant begins at the points of contact with the most heat-stressed engine parts and the formation of increased local overheating. In addition, it is better to start the car for 10 seconds after 2-3 minutes, so that the new volume of coolant begins to contact the engine parts.

Determine where the steam is coming from, if any. When inspecting the engine, pay attention to the presence of coolant in the expansion tank (be careful not to burn yourself), the integrity of the rubber hoses, radiator, thermostat.

Look under the dashboard on the passenger side of the passenger compartment and find out if there are any leaks or traces of coolant flowing from the heater radiator under it.

If coolant leaks are found, a burst hose can be temporarily repaired with adhesive tape or band-aids from the first aid kit.

A radiator, thermostat or heater leak is quite difficult to fix on the spot, so in such a situation it is necessary to add water to the cooling system and carefully monitor the temperature gauge while driving, periodically restoring the level in the cooling system.

The engine can overheat if the thermostat fails, which controls the flow of fluid in the cooling system through the radiator or in addition to it (to accelerate the warm-up of a cold engine). To check the thermostat, on a warm engine, check by touch the temperature of the hose connecting the thermostat housing to the radiator. If the hose is cold, the thermostat is faulty and there is no circulation through the radiator.

Very often, the cause of overheating of the engine, the cooling system of which is equipped with an electric fan, is the failure of the fan. Start the engine, monitor the temperature and note if the cooling fan turns on when the engine overheats.

If the fan does not turn on, the fuse may have blown, the turn-on relay may be faulty, the motor may have burned out, or the wiring may be faulty.

Check the integrity of the wiring, the reliability of the connection of electrical connectors.

If the wiring is OK, check the fuse and replace it if it is defective.

If the fuse is good, try replacing the fan relay.

If the fan still does not turn on, check the motor. To do this, take two additional wires and power it directly from the battery. Wires must be securely fastened and insulated.

If the electric motor started to work, the wiring is faulty; if not, the wiring or the motor itself is also faulty. The relay and motor are not repairable, replace them as an assembly.

If the fan itself on your car does not work, then carefully check all of the above components of the cooling system. However, there are times when one situation will not be relevant to the breakdown in question.

Fuse

Electrical problems

If checking the reservoir cap did not reveal any malfunctions, then perhaps the problem lies in the circuit.

The search must begin by checking the health of the fuse F7. To do this, you need to gain access to the mounting block and check the contacts for the presence of oxidative traces. If nothing like this was noted, then proceed to the next step. Otherwise, clean the contact connections or simply replace the fuse with a new element. The part is cheap.

The next step is to check the fan on sensor:

1. Initially, warm up the car to 100 degrees.
2. Shut off the engine and start the engine immediately.
3. Open the hood and disconnect the terminal from the fan sensor.
4. If, after disconnecting the contact, the fan starts to work, then the unit is working, and the sensor needs to be replaced.
5. When, after disconnecting the terminal, the fan does not turn on, then the situation is reversed - the sensor is working, but the fan is not.

Motor failures are often the reason that the fan does not turn on. If all the previous measures did not help you find the problem, then you will need to dismantle the electric motor. The following issues can be identified at this node:

1. The commutator brushes have worn out.
2. The brushes are stuck.
3. There was a short circuit on the armature winding - the problem is determined by the characteristic smell.

Relay problems. Sometimes a situation arises when the fan start button of the cooling system simply fails. In this case, you will need to carry out the following work:

1. Remove the trim on the right side of the torpedo inside the cabin. To do this, unscrew the two screws.
2. There are three relays under this panel.
3. The desired relay is usually located on the side of the front of the car.
4. To be sure to act correctly, find the car's instruction manual and check the wires that go to the relay we need.
5. To solve the problem with the relay, you just need to install a new element. Don't skimp on this component. Cheap models break very quickly.

What to do when the fan is constantly running

There are situations when the cooling radiator works without interruption, both on a hot and a cold engine. The reasons may be very different. Now we will look at the main problems and how to solve them.

1. An open in the sensor that monitors the temperature of the antifreeze or its circuits. In this case, the check engine light comes on. The circuits and the sensor are checked with an ohmmeter. The problem is solved by replacing the element with a new one.
2. The fan relay contacts open. First, the component is checked with a multimeter and, if necessary, replaced with a new one.
3. Faults in the ECU. Check this node on the profile service. In the event of a malfunction, the firmware or the unit is completely changed.
4. In VAZ carburetor models, the thermal switch contacts do not open. To test the performance, disconnect the terminals from the terminals of this node - and the fan will stop. In this case, the defective part must be replaced.

If the checks carried out have not determined why the fan is constantly running, then the only possible way out of the situation is to contact the service center.

Full-fledged service stations, as a rule, conduct a complete computer check of the cooling system, which is able to identify the most difficult-to-find faults. The breakdown can be much more global than the usual fuse failure.

If the usual verification actions did not give any results, then do not be afraid to contact the service, and even in those cases when you consider yourself an experienced craftsman. Often, modern equipment and a professional approach significantly reduce the time for troubleshooting. Whereas conventional methods would take weeks to identify the problem. Therefore, car services have their own advantages.