VAZ 2109 carburetor cooling fan does not work

go ahead and call the whole chain from Carlson to the wires under the steering wheel

The first thing you need to try is to unhook the sensor on the radiator. If it doesn’t work, then one wire goes to ground under the right headlight, the other goes to the mounting block on the Ш6-9contact connector general diagram www.lada72.tk/scheme/29-s…orudovaniya- vaz-2108.html diagram of the mounting block www.lada72.tk/scheme/30-s…08-novogo-obrazca-.html. And it comes to K9 - the relay for switching on the electric motor of the engine cooling system fan. From the diagrams you read, you have a closed the fan sensor to the housing, it is possible that the thermistor in the sensor itself is broken, which rarely happens, or the contacts on the K9 relay are stuck.

this trouble... the same situation. whatever he did. I changed the fuses, changed the sensor... in short, I changed everything except the fan)) in the end the block jammed and connected forced activation via a button. minus, plus and into the salon. I put the wires right under the fan terminals. so this bitch started turning on by itself at 95...)) the button is no longer needed... it turns out there was a bad contact on the fan itself...

Your problem is that the permanent minus of the Ш6-9 contact connector, the wire to the sensor, went to the relay of contact 86 - turning on the relay itself. Most likely, this wire was sitting on the case. The fan has nothing to do with it, since it itself sits minus on the case, but is a plus connection with heated rear window, steering switch, hazard warning button.

Everything was fine with the installer, he opened everything cleanly and dryly, it’s new, there’s still a whole gasket, and I cover it with a piece of rubber on top

And I didn’t even write to you that it’s not in order, you read again what’s written, this is the whole connection of your fan, I couldn’t explain it further to you. So that you don’t have to worry about uncoupling the Ш6 connector, the 9-pin fan will stop turning (disconnecting the relay), and this wire goes to the sensor itself, so then jump from pin 5 to the sensor, what’s not clear?

Why the fan does not work - VAZ 2109

Two fans are installed on the VAZ-2109 car . The first, more powerful, is installed in the engine cooling in order to increase air flow through the radiator core. The second fan is installed in front of the heater radiator (“stove”) , its task is to pump heated or unheated air inside the car. Both fans are driven by DC motors.

It is necessary to start looking for the cause of malfunctions from motor activation sensor . To do this, open the hood and disconnect the terminal from the sensor. To further check the sensor, you will need a piece of wire, with which you need to short-circuit the two wires suitable for the terminal. Wrap the jumper with electrical tape so that it does not touch the ground of the car. Turn on the ignition, and if everything else is correct, the fan will start working. Moreover, in this case it will work continuously as long as the ignition is on.

To do this, you will need two insulated wires to connect the fan motor terminals directly to the battery. If the fan starts working, make sure that the air flow goes under the hood of the car, and not vice versa. If the connection is incorrect, change the polarity of the wires connected to the battery. When troubleshooting, you can thus get to the repair site, and you can turn off the fan motor only by disconnecting the wires from the battery. In this case, the reason that the fan did not turn on would be either a faulty relay or a faulty wiring.

In order for the driver not to be left alone with such malfunctions, he needs to have in the trunk of his car a coil of car wires three meters long and a supply of fuses , which are located in the mounting block.

Causes of fan malfunction

In a VAZ 2109 car, the cooling system fan may make extraneous sounds during operation. There can be many reasons for this behavior:

It is possible that the bolt that secures the fan to the engine has simply become loose. Because it doesn't hold up well, it wobbles while riding. Actually, this leads to the formation of incomprehensible sounds.
The radiator is not installed correctly. That is, he is not in his place. Perhaps it lies on the cross member of the suspension, which is also not very good.
The fan may have broken on one side, causing an imbalance.

Note: it is not necessary to change it completely. It is enough just to replace the damaged part.

There is dirt on the impeller. This seems like a complete trifle, but it leads to an imbalance. The result is an incomprehensible tapping sound.

The cushions are not clamped well, so they do not hold the motor well. The cushions may be compressed (this happens after long-term use). As a result, the motor vibrates.

Note: this problem can be corrected by replacing the pillows or inserting rubber gaskets.

If the fan makes a loud noise, it means it lacks lubrication (you need to urgently lubricate the engine with oil).
The bearing broke. This problem occurs because the impeller has been damaged for a long time, so there is an imbalance in the system.

Note: there is only one way to solve this problem - replace the bearing. However, before this, you need to correct the position of the impeller, since another bearing may soon be damaged due to it.

Checking the cooling system

Open the VAZ radiator tap, as well as the car air damper, which controls the air flow.
Turn on the electric motor that regulates the operation of the radiator at maximum power.
Inside the VAZ car, turn on the emergency button, then press the clutch pedal with your foot and very carefully drive off the road, stopping the car on the side of the road.
Leave the VAZ 21099 carburetor engine running for several minutes at normal idle speed with the radiator on.
After turning off the engine, the coolant system heats up precisely in those places where it comes into close contact with hot parts, resulting in the formation of so-called vapor locks.

Keep in mind that an overheated engine will not be able to shut down immediately. But such work is quite harmful to the VAZ engine, so it needs to be completed regardless of the resistance of the car.

Checking all wire connections

Step-by-step instructions for checking the cooling system.

First you need to open the hood of the car and inspect the entire space under it. Find a source of steam. Check whether there is enough coolant in the tank, whether all rubber hoses, the radiator and, of course, the thermostat are intact. Perhaps it is these parts and systems that need to be replaced.
Look under the foot mats to see if there is any liquid there. There must be a good reason why the car engine is not cooling.
If fluid is not found, you need to see if the sensors that start the radiator motor are working. To do this, you need to remove two wires from the sensor mounts located inside the radiator and connect them. After this, turn the ignition key on the car. If, after connecting these wires, the cooling fan begins to spin, it means that the fluid level in the cooling system must be brought to the desired level.
The cooling fan itself must be running constantly. You need to check the sensors in the radiator. At the first opportunity, it is worth replacing these parts with new ones, as well as replacing the pipes.
If the cooling system fan does not work when the wires are shorted, the cause may be a blown fuse or a broken fan relay. Another possibility is a burnt-out cooling system motor. In this case, it is necessary to replace all faulty parts.
After replacing failed elements, a control check should be carried out. To do this, you need to short-circuit a pair of wires that are connected to the car cooling fan switch and turn the ignition key. If the fan motor can turn on, the problem has been resolved.
If the cooling fan does not turn on, you need to check it by supplying power to the electric motor from the battery.
The engine of a VAZ 21099 carburetor can overheat even if the thermostat, which regulates the passage of liquid in the cooling system past the radiator or through it, has failed. In order to understand whether this is so, you should check the temperature of the hoses connecting the engine and radiator. If the bottom hose is cold, the thermostat is faulty.

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Examination

On VAZ 2109 engines, the operating temperature is 90 degrees.

If the indicator needle crosses the 100 degree mark, the car should be stopped immediately, the engine should be turned off and the power unit should cool down. Without doing this, you risk major, expensive engine repairs.

The motor can overheat for various reasons:

The thermostat has failed;
The radiator is clogged;
The radiator fan has failed;
The fan switch sensor is broken;
The coolant level in the system has dropped;
The pump has failed;
The integrity of the wiring in the fan circuit has been compromised.

All these reasons can and should be checked before purchasing new parts.

Here is an example of checking a fan and sensor.

Sensor

Causes of fan malfunction

There are times when the radiator cooling fan runs continuously. This is also wrong. What to do in this case? What is the cause of the malfunction?

There may be a broken circuit in the temperature sensor. This will be indicated by a constantly lit sensor light. In this case, you simply need to replace the temperature sensor or the injection system unit. The relay may need to be replaced. Also, the contacts on the radiator thermal switch that triggers the relay may not open. To fix the problem, you will need to replace the thermal switch.

To find out the cause of the fan malfunction, you will need to remove it.

Disconnect the fan block and harness by disconnecting the wires.
Disconnect the motor wire by unscrewing the left nut. If necessary, use suitable keys.
Under the hood, unscrew the two screws that secure the fan.
Take out the casing.
Remove the two fan mounting bolts.
Remove five more bolts and the air intake grille.
Lift the fan support and pull it towards you.
Rotate the fan itself 90 degrees and remove it.

Fan motor connection diagram

If there is any breakdown in the car, regardless of whether the fan has stopped working or something else, you should contact a specialized workshop. Experienced technicians will always find the cause of the problem, select suitable parts, sensors and carry out repairs. Of course, many car owners want to repair their vehicles themselves; this gives them a lot of pleasure and requires minimal costs.
But in this case there is a risk of making a mistake with the selection of parts and the correct diagnosis. A car enthusiast can spend a lot of effort and time, but in the end do not get the desired result. To prevent this from happening, it is better to contact a specialist.

Fan

If the problem lies in the injector or carburetor cooling fan, then you will have to remove it. It is quite possible to repair the unit by replacing the electric motor or impeller.

Diagram with casing, radiator, fan and impeller

To remove the valve, perform the following operations:

Disconnect the negative terminal from the battery;
Disconnect the wire terminals. One of them is mounted on the fan casing;
Take a wrench and unscrew a couple of connecting bolts. They fix the vent casing on the left tank;
Next, unscrew another lower nut holding the device casing;
Now you will need a socket extension to unscrew the right nut on top that secures the vent housing to the radiator;
All that remains is to unscrew the fan pressure plate. To do this, remove the pair of left nuts;
Remove the pressure plate by hand;
Now remove the fan along with the casing.

You have removed the unit. Now you have a choice - change the entire unit, or try to repair it by replacing the electric motor or impeller if they are damaged.

Replacing the electric motor

Disconnect the fan motor wire that is held in place by a clamp on the casing.
The electric motor is held on the casing by three nuts. They all need to be unscrewed.
Remove the electric motor from the fan housing.
Be sure to check the condition of the rubber bushings of the electric motor, which will remain on the casing. If cracks or signs of deformation are detected, they must be replaced.
Check the electric motor for functionality. If it fails, you can purchase a new one and insert it into the old casing.

Electric motor

It is not uncommon that the performance of a radiator fan is impaired due to a deformed impeller. By replacing it, you can restore functionality to the device.

Replacing the impeller

To change the impeller, follow the instructions:

Pry up the lock washer using a flathead screwdriver. It is located directly in the center of the impeller;
Lift the washer and remove it;
In some cases, the impeller is secured to the fan motor with a nut. Therefore, if you have one, unscrew the mount;
Remove the impeller and assess its condition. If it is worn out or deformed, replace it with a new one;
Many people, instead of a standard 4-blade impeller, install a more advanced 8-blade impeller.

Changing the impeller

During reassembly, make sure that the motor pin fits into the longitudinal hole on the impeller, as shown in the figure below.

Direct the pin into the longitudinal hole

Cooling fan VAZ 2109

Piston of engine jammed due to overheating

Fan connection diagram for VAZ 2109

From the figure it is clear how the circuit works: when the ignition is on, +12 Volts are supplied through fuses to the fan relay. As soon as the fan switching sensor closes the minus relay to ground, the executive contacts of the relay itself will operate and turn on the fan motor.

Scheme 2 for turning on the VAZ 2109 fan

General characteristics of the model

The VAZ 21099, like other models of this family, has many advantages:

has excellent controllability when driving;

In 2004, this model of car was no longer produced in Russia, but its production continues in Ukraine.

In the VAZ 21099 injector, the supply of gasoline when you press the gas pedal is controlled by a computer. In a carburetor engine, such emissions are controlled by special damper plugs.

Quite often, the owners of this car are faced with one problem: the VAZ 21099 carburetor cooling fan does not work.

The cooling fan does not work, what is the reason for the VAZ 2109

the whole circuit needs to be checked
We start from the fan fuse. then the fan itself. then its connector. then the thermostat. if everything previously listed is alive, then there is a “hemorrhoid” called the engine compartment wiring. if the car was left not far from garbage containers, then there is a chance of the wiring being gnawed (I fell into this myself. Today I just installed it, and tomorrow I was freaked out by the fact that rats devoured it)

The reason may be in each component. By the way, is the VAZ-2109 with a carburetor or an injector? This ALSO matters.
try changing the fan switch sensor or maybe the connector has just come loose
VAZ 2109 - injector or carburetor? if INJECTOR: -open the hood and see if the antifreeze (antifreeze) is in the expansion tank? Is the connector on the cooling fan rotten (there is a two-pin connector)? does it heat up and does the thermostat work? The fan switch sensor may also be faulty (the two-pin sensor is located on the thermostat), it is also worth checking the fuse for the fan. BUT FIRST OF ALL - WHEN TURN OFF. IGNITION REMOVE THE CONNECTOR FROM THE TEMPERATURE SENSOR AND TURN ON THE IGNITION, IF THE FAN TURNES ON IN A FEW SECONDS, THEN CHANGE THE ON SENSOR. THERE IS NO FAN, THEN TURN OFF THE IGNITION, PUT THE CONNECTOR IN PLACE AND LOOK EVERYTHING IN ORDER AS WRITTEN ABOVE. -IF 2109 CARBURETOR, THEN WHEN OFF. IGNITION REMOVE THE CONNECTOR FROM THE SENSOR ON. FAN (LOCATED ON THE RADIATOR - TWO-CONTACT SENSOR), JUMPER THE CONNECTOR AND LOOK: IF ON. FAN, THEN THE PROBLEM IS IN THE SENSOR, IF WE LOOK AT THE FUSE, THE CONNECTOR TO THE FAN AND THE FAN ITSELF (THE IMPELLER COULD BE JAMMED).
In both cases, there must be antifreeze (antifreeze), a working fan (if it rotates easily by hand, then it’s normal), a connector on the fan that has not rotted, and a complete set of components. Good luck! If the carburetor, remove the wire ends from the switch on sensor on the radiator and bridge them with the ignition on, if the fan starts, change the sensor, if not, check the fuse, relay, electric motor, for injection engines only the fuse, relay and electric motor
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How to replace a fan

If replacing the impeller does not help, then you will have to take extreme measures - replace the cooling fan itself.

To do this you need to do the following:

Open the hood.
Remove the air filter housing.

Note: After this there will be enough space to carry out further work.

To easily remove the fan frame, unscrew 2 nuts and 2 bolts (with a 10mm wrench). The two nuts and the first bolt can be unscrewed without difficulty. However, you will have to tinker with the last bolt. The fact is that it is located in a not very convenient place. Access to it is hampered by the cross beam and the levers that are attached to it.

Protrude the impeller. Any convenient tool will do for this.

Note: the impeller itself is very fragile, so work with it should be carried out carefully.

Using a 13mm socket, unscrew the nut that secures the impeller.
Under no circumstances should you lose the key that is inserted into the motor shaft. Otherwise, you will have to make something similar to it yourself, and this is not so easy.
Replace impeller blades.

Insert it into place (if necessary, you can use a new impeller). The nut needs to be tightened as tightly as possible, because if the impeller dangles, it will soon break again.

Before you put the fan in place, you need to install two rubber washers. This will ensure that the vibration coming from the fan will be less noticeable on the body of the vases.
To easily put the mount back on the stud, you can make a small slot in the lower mount of the frame.

Insert the fan. Tighten all the nuts that secure it.

Double fan

In the summer, the “nines” especially overheat. Therefore, in order to ensure maximum engine cooling, you can install two instead of one fan. For this:

First of all, you need to make another mount for the fan.
In addition, you also need to make a small hole in the fan itself so that it can be easily installed in place.
Disassemble the motor and remove the magnets (it is better to use a screwdriver to prevent them from breaking).

Note: it is important not to confuse the order in which the magnets were placed, so they need to be marked.

Use a grinder to cut off the previous cylinder fasteners and weld new ones in their place.
Reassemble the motor in reverse order.
Screw the frame to the motor.
Install the blades.
Connect two fans to the blades.

Note: one fan will already be connected (since it is standard). The other can be turned on as needed by making a special button in the cabin.

The cost of repairing a cooling fan at a car dealership is not too high. However, if you do this work yourself, you will have to pay even less. We must not forget that before this it is worth reviewing various photos and videos on this topic. Perhaps the instructions we offered will also be useful.

The VAZ 21099 sedan is the final model of the Samara series. It was manufactured on the basis of the VAZ 2109; it was slightly different from other variants of this family by the front end of the body.

VAZ 2109 cooling fan does not turn on

The cooling fan on the VAZ 2109 does not turn on. At the same time, the thermostat, sensor and the fan itself were changed. However, the problem has not been resolved, what could it be?

To find the cause, you should follow a simple path - eliminate possible causes one by one. The fan and sensor have been changed, so the reason could be either the relay or the fuse.

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1. Check the fan relay and fuse F4 located under the hood

2. Make sure the sensor is working. Close its contacts, put it in boiling water and check the resistance.

3. Check the wiring going to the cooling fan, there may be a break somewhere

If after all the above procedures the fan still does not work, contact the diagnostic center