Modern domestically produced cars are equipped with various controllers and sensors that ensure full operation of the car. If one of the devices fails, this can lead to incorrect operation of the nodes. From this material you can find out what the Priora and Kalina fan switch is and what malfunctions are typical for it.
If the Lada Kalina cooling fan fails, you should immediately find the cause and eliminate it. If the car “boils”, this can lead to fatal consequences. In the best case, a breakdown of the gasket, and in the worst case, a deflection of the cylinder head, which will lead to its forced replacement. So, this unit should be monitored and diagnosed regularly.
How to find the reason
Start checking with the electric motor. To do this, disconnect the electrical wires from it and connect it directly to the battery, observing the polarity. If the fan does not turn on, that is the problem. If it works, you need to look for another reason.
Check all contacts on the connectors, and then the relay and fuse. They are located in an additional mounting block, which is located to the right of the instrument panel near the lower heater air duct.
The fuse (50 A) can be checked with a tester; it is better to take a relay that is known to be working and install it in the appropriate socket. If the problem is not solved, move on.
Checking the temperature sensor. To do this, warm up the engine to operating temperature, turn it off and disconnect the sensor. It is located on top of the thermostat housing. When the sensor is disabled, the controller must independently start the fan to operate continuously.
Start the engine and wait for the fan to turn on. If the coolant temperature has reached a critical value and the fan does not turn on, you need to look for a break in the electrical wiring.
Do I need to change the fan?
If you have determined that the problem is in the fan itself, or rather in its electric motor, you can try to repair it. Most often, it stops working due to failure of the brushes, or due to problems with the rotor bearings. Less often the collector becomes unusable or a break occurs in the winding.
If the fan cannot be repaired, it must be replaced.
Under no circumstances should you drive a car with a non-functioning fan. Overheating of the engine will inevitably lead to the destruction of the rubber hoses of the cooling system, gaskets, and also threatens the failure of parts of the piston group.
Design and principle of operation of DVV
The coolant temperature meter on Kalina is a brass cylinder in the form of a nut skirt, at the bottom of which there is an installation thread with a sealing washer made of aluminum or copper. At the top of the device there is a plastic cup with two detachable terminals inside. One of them is connected to ground (minus). The second contact (plus) is connected by a wire to the ECU.
Inside the housing there is a bimetallic plate that fits tightly to the inside of the tip, which is washed by coolant. When a critical heating level (90-950C) is reached, the bent plate straightens and closes two contacts. Current begins to pass through the terminals and enter the electronic control unit (ECU). The unit gives commands to deplete the fuel mixture entering the injector and turns it on via the EV relay.
As soon as the temperature of the liquid in the thermostat begins to drop, the fan will turn off. Such a self-regulating system constantly maintains the optimal antifreeze temperature at an acceptable level, which means the engine itself will not overheat.
DVV connection diagram:
Is there a need to replace the fan?
Having discovered that the problem lies in the fan or electric motor, you can try to repair this element. Mostly, on Kalina 1.6 (8 valves) the cooling fan does not turn on when the brush breaks or the rotor bearings become unusable. Less often, the problem should be looked for in the collector or winding break.
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If the device cannot be repaired, the element must be replaced. Do not attempt to drive with a broken fan. Overheating of the engine will automatically lead to rupture of hoses, rubbing of gaskets and malfunction of the pistons.
The cooling fan on Kalina does not turn on, what should I do?
The situation when the cooling fan on Kalina does not turn on is quite common. Such a malfunction can create quite a lot of discomfort, because every 5-10 minutes you will have to brake the car so that the engine cools down. In winter, when the air temperature drops below 10 degrees below zero, this can still be dealt with, but on a hot day, such a problem will lead to serious problems, especially when you need to drive around the city. We’ll talk now about how to solve the problem of the fan not turning on on Kalina.
Looking for a reason
Start checking with the electric motor. To do this, disconnect the electrical wires from it and connect it directly to the battery, observing the polarity. If the fan does not turn on, that is the problem. If it works, you need to look for another reason.
Check all contacts on the connectors, and then the relay and fuse. They are located in an additional mounting block, which is located to the right of the instrument panel near the lower heater air duct.
The fuse (50 A) can be checked with a tester; it is better to take a relay that is known to be working and install it in the appropriate socket. If the problem is not solved, move on.
Checking the temperature sensor. To do this, warm up the engine to operating temperature, turn it off and disconnect the sensor. It is located on top of the thermostat housing. When the sensor is disabled, the controller must independently start the fan to operate continuously.
Start the engine and wait for the fan to turn on. If the coolant temperature has reached a critical value and the fan does not turn on, you need to look for a break in the electrical wiring.
Do I need to change the fan?
If you have determined that the problem is in the fan itself, or rather in its electric motor, you can try to repair it. Most often, it stops working due to failure of the brushes, or due to problems with the rotor bearings. Less often the collector becomes unusable or a break occurs in the winding.
If the fan cannot be repaired, it must be replaced.
Under no circumstances should you drive a car with a non-functioning fan. Overheating of the engine will inevitably lead to the destruction of the rubber hoses of the cooling system, gaskets, and also threatens the failure of parts of the piston group.
Replacing the fan switch sensor on a VAZ 2101-VAZ 2107
Welcome! The fan switch sensor is far from the last sensor in a car, because thanks to it, the radiator fan turns on when the engine temperature reaches a certain point, but not on all cars, for example, if we take the very first VAZ 2101, they did not have this sensor at all , later, of course, it appeared, but closer to the removal of this car from the assembly line, but these cars almost never warmed up, since their fan was spinning constantly, but if the cooling system of the car is fully operational, then the cars with a sensor thanks to which turn on the fan will also not heat up, and it will warm up much faster because the fan does not spin and allows the engine to heat up very quickly.
Note! To replace this sensor, take with you a set of tools: In this set you must have a wrench set to “30”, with its help you will turn out the sensor, in addition to it, stock up on a large container (a 10 liter basin will be perfect), but although if you do everything quickly, you won’t need any container, in general, a little later (As you read the article) we will explain to you why you need a basin and what to do if you don’t want to get it dirty!
Where is the fan switch located? Let's start with the fact that you need to look for it in the engine compartment of the car, opening the hood immediately look for the radiator (It is indicated by a blue arrow in the large photo), the sensor will be screwed into this radiator (the sensor is indicated by red arrows), but only as you see in the photo below, the wires from the sensor are disconnected, respectively, they will be connected and you will see a slightly different picture, besides this, as you can see, all the radiators have a completely different shape and some have holes for the sensor in the lower left part (see large photo), and for someone in the lower right part (see small photo), if you have it in the right, then the sensor will be located just above the lower pipe, which is indicated by a blue arrow, but on an aluminum radiator this sensor is generally located at the very bottom under the pipe and not above it , so look for it, in fact, it always has one shape, and you can see its shape perfectly in the photographs below.
When do you need to change the fan switch sensor? It is replaced when it fails, namely, if the radiator fan stops turning on, you will immediately understand this if your car heats up to a high temperature and the fan still does not turn on, although in this case the electric motor of the fan may also be to blame, but all this (the serviceability of the sensor also means the fan motor) is easy to check, just grab with your hands in this case both wires that are connected to the sensor (These are essentially terminals, see the photo below) and disconnect them, and when they come out, bridge them together and hold it, it’s better to do this with gloves on and we don’t advise you to handle the terminals, just grab the wires themselves and jumper the ends of the terminals, after that the cooling fan should start working immediately (In this case, the sensor needs to be changed), and if the fan doesn’t turn on, then either you have a problem with the electric motor or something with the wiring that is connected to the sensor, but basically the fan always turns on and this indicates that the sensor has stopped working, by the way, if this sensor breaks in your traffic jam, then you can safely disconnect these two wires from it and rewind them with insulating tape so that they fit together, after which your fan will work constantly, or rather until you open the terminals. (Ignore the arrows in the photo below)
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Note! When you connect the wires to each other, do not forget to turn on the ignition on the car and what else, if suddenly when you connect the wires your fan does not work, check the fuse that controls the electric motor, it may have burned out and needs to be replaced!
Description
As you know, any Priora and Kalina have a cooling system that ensures normal engine operation and helps prevent overheating. One of the devices that allows you to cool the power unit is a fan sensor, upon the signal of which the ventilation device should turn on.
On Kalina, this controller is designed to activate the fan when the engine temperature reaches a certain point. Thanks to the fan, which must turn on based on a signal from the controller, the engine temperature will always be normal and will not exceed the permissible threshold. If the device does not work, the fan will not turn on, and the engine may overheat.
Sensor connection diagram in the cooling system
The main reasons why the radiator cooling fan does not work
Let's look at the main options and places to look for faults:
- Thermostat.
Thermostat removed from Lada Kalina
If it fails, this is the reason why the cooling fan does not work correctly . To diagnose this malfunction, you should touch the lower pipe. If it is cold, then the thermostat is dead. Many Kalina car owners are accustomed to this phenomenon, since it often breaks down, and they carry a spare one with them.
- If it's not the thermostat, then the next step is the fuses. You need to make sure that they are working and all controllers too. The easiest way is to test them using a tester or ohmmeter. The fuse diagram is here.
The relay box with the fan fuse is located under the instrument panel console, next to the controller. The fan fuse has a capacity of 50A, it is number 3 . Fan relay number 1 .
Relay and fuse box
If the fuse is alive, then you will have to remove the additional fan control unit. To do this, it is worth moving the warm air duct and using a 10 mm wrench to unscrew the fastenings of the unit. Now you can get it freely. It has two relays that are responsible for turning on the fan and for high speeds. Let's diagnose both.
- Now, we can move on to the darkest option - we climb under the hood and “ring” the contact wires of the fan itself. Of course, there may be a break or break in the wire, but there is nothing worse than a burnt winding inside the fan. Most likely the fan in this case will need to be replaced.
- Another reason for the fan not turning on may be a broken thermostat sensor . In order for the fan to start in emergency mode, you will have to remove the connectors from it. You can check the sensor by removing the thermostat and placing it in a pan of hot water; the thermostat should open.
- The last reason why the fan may not work is a break in the switching circuit itself.
Electrical circuit diagram of the cooling fan
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Replacing the cooling fan Lada Kalina
To replace the cooling fan, it is not necessary to go to a service station. You can do this without much difficulty on your own.
Required tools:
- head with ratchet or socket wrench 10;
- spanner or open-end wrench 8;
- screwdriver with Phillips bit;
- pliers.
Work order
- Place the car on a level surface.
- Raise the hood, disconnect the ground wire from the battery.
- Using a 10mm wrench, unscrew the two air filter mounting bolts.
- Disconnect the mass air flow sensor connector by pressing the latch.
- Disconnect the purge valve connector located on the air filter housing.
- Using a screwdriver, unscrew the bolt of the air duct fixation clamp and remove the corrugation.
- Unscrew the 4 screws securing the air filter cover.
- Remove the cover and remove the filter element.
- Using a size 8 wrench, unscrew the nut securing the air intake and remove it.
- Using a size 10 wrench, unscrew the two nuts securing the fan casing on the right in the direction of travel of the car, and then with a size 8 wrench, unscrew the two nuts on the left.
- Disconnect the fan power connector.
- Carefully, so as not to damage the radiator fins, remove the fan along with the housing.
- Using a 10mm wrench, unscrew the 3 bolts securing the electric motor and remove it from the housing.
- Install a new electric motor with impeller in its place.
- Screw the casing assembly with the fan to the radiator.
- Connect its connector.
- Carry out the rest of the installation work in reverse order.
How to replace a fan
Having understood exactly why the cooling fan of the Lada Kalina does not work, you should replace the faulty element. With the proper skills and dexterity, you can perform the repair yourself. The tools you need to prepare are pliers, a screwdriver, wrenches 8 and 10.
First, we place the vehicle on a level surface. Then we lift the hood and disconnect the system from the battery. Using a wrench, disconnect the air filter mounts. Next, you need to disable the mass air flow sensor (just press the latch) and the purge valve, which is located on the air filter housing. Unscrew the clamp bolt and remove the corrugation.
Remove the air filter cover, remove the filter element, and dismantle the air intake. Then we proceed to attach the fan casing and disconnect the power supply to the fan. Having done everything correctly, you can dismantle the fan. We remove the electric motor and then replace it with a new element. Then we put everything back together.
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Finally, it is worth checking the functionality of the device. We start the engine and then warm it up for 3-5 minutes. The fan should turn on during this time. There is no need to turn off the car as soon as the fan starts spinning - you should wait until the device turns off automatically.
What if the fan completely stopped working?
To determine the cause of such a malfunction, you first need to check the condition of the fuse in the electrical circuit. It can be found on the side console, near the passenger seat. It is hidden under the deflector cover. By unscrewing the screw, the cover can be easily removed and the fuse will be available for examination.
To remove the entire safety block and connected relays, the mount must be released. You can't do this without wrenches. You need to remove the unit carefully without haste, as you can damage the wires that are connected to it. Only the single fuse of the unit is responsible for the operation of the fan.
If the fuse is intact, it is necessary to check the operation of the relay that powers the fan motor. There are two such relays installed. The left one turns on low fan speed. And the one located on the right is responsible for the high speed of its operation.
Another problem that relates to the cooling fan relay is that the cooling fan continues to operate when the ignition is turned off. This may drain the battery. “Kalina” then simply won’t start. The main reason is sticking contacts. The block is exposed to antifreeze leaking from the radiator installed above the stove.
When the relays and fuses are working properly, you need to check the operation of the temperature sensor. It is he who orders the fan to start working. This sensor is located on the right side of the radiator tank.
To check its functionality, you need to remove the plug connector, take a jumper, and use it to short-circuit the connector terminals. The fan turning on indicates that the sensor is in good condition. If the fan does not react at all, then before changing the sensor, you need to check the functionality of the fan motor. To do this, the electric motor terminals must be connected to the battery contacts. The engine should start working. In case of failure, you will have to install a new electric motor.
Diagnostics of the cooling system in your own garage
EV failure can be caused by several reasons. They need to be identified and eliminated one by one. Before working on the sensor, you need to check the following points.
Integrity of wires leading to the sensor
Visually and tactilely check the condition of the insulating coating of each of the two wires. If there is no damage to the polymer sheath of the wires, they are “ringed”. That is, use a multimeter in ohmmeter mode to check the presence of resistance at the ends of the conductors.
Electrical fan operation:
Cleanliness of the contact group
The cable with the chip is disconnected from the contact cup of the fan sensor. Visually check the condition of the terminals. If oxidation of the contacts is detected, they are cleaned with fine sandpaper. The connection of the connectors is restored.
Voltage
On the removed chip from the DVV, check the voltage with a multimeter. One of the contacts should show “0” V, and on the other terminal the device on the screen should display a reading of 5 V. During the test, the engine should be running in idle mode.
Fuse
If it is determined that there is no voltage at the positive terminal, then it is necessary to check the integrity of the fuse installed in the break in the supply wire of the sensor. A bad fuse is characterized by a burnt-out metal track. Then you need to install a new part and test its operation.
Relay
From the fuse panel, remove the relay from its sockets. Remove the plastic box by pressing the side clips. If burnt contacts are detected, the device is replaced with a new relay.
Electric fan relay:
Electric fan
Check the condition of the fan contact group. The EV is connected with additional wiring to the battery. If the fan does not turn on directly, then the problem is in its electric motor or bearing.
If all diagnostic stages do not reveal any malfunctions, then you need to check the fan switch itself.
