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.
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
Factory setting of fan temperature
The switch-on temperature depends on which ECU is installed and what settings are used in it. In stock, the first fan should turn on at 97 degrees, the second at 104 degrees.
A little more and the fan should turn on. Depends on the settings in the ECU.
You can change the switching parameters using an on-board computer, for example, BC STATE. We don’t have a BC, but we connected it specifically from another machine, and set the response temperature to 95 degrees. By the way, our editorial office has one of the very first Prioras. Here the factory temperature for turning on two fans at once is 104 degrees.
Optimal temperature
After turning off the fan, the temperature should be at this level. If this is not the case, then look at the thermostat; most likely it circulates the liquid in a small circle.
The optimal temperature for turning on the cooling fan depends on the operating conditions of the vehicle. If the main mileage is on the highway, then the factory settings (universal) will be optimal. If you live in a “warm city” and often get stuck in traffic jams, then it is better to lower the switching temperature. It's calmer this way.
An internal combustion engine is a complex mechanism, in order to ensure smooth operation of which a number of conditions must be met. And the temperature regime is no exception. For example, if the temperature is insufficient, this will negatively affect the quality of the formation of the fuel mixture in the cylinders. If, on the contrary, the heating is too strong, then the cylinder-piston group may jam, which in turn leads to the need for lengthy and expensive repairs.
Thus, the normal temperature (operating) for the Lada Priora engine is 85-90 degrees. When the temperature rises to 97-100 degrees, the fan should automatically turn on. If this does not happen, then the problem may lie both in the fan itself and in the sensor for its activation. But first of all, you should check the wire connections.
Radiator Inspection
Photo from the inside. We inspect for fluid leaks and strong dents.
Severely clogged cooling radiator.
If you have any more questions, you can leave them in the comments!
Source
The main reasons for sensor malfunctions
So, for what reasons on Kalinas and Prioras, and on all VAZs in principle, the controller may not work:
- The first reason is the thermostat not working. This problem is one of the most difficult; when it occurs, the fan will not work correctly. To make sure that the thermostat is working, you will need to touch the lower hose - if it is cold, then the device has really failed. In general, for Kalina, thermostat failure is a fairly common occurrence.
- If the thermostat is working, then it is necessary to diagnose the safety elements. You should also check the condition of the circuits themselves; use a multimeter to do this. The fuse diagram should be indicated on the back of the unit cover. In the case of Kalina, the unit is located under the dashboard, you are interested in fuse element 3, its capacity is 50 amperes. If the fuse is working, then you need to diagnose the fan relay, it is marked with the number 1. If these elements are working, you will have to remove the fan control unit - to do this, move the air duct and, using a 10-mm wrench, unscrew its fastening. There should be two relays on the block, they should be checked.
- It would also be a good idea to climb into the engine compartment and ring the contacts of the fan itself. The problem may be a break, broken wiring, oxidation of contacts, or a burnt-out winding inside the device. Problems with wires and contacts are solved without problems - bad wiring is replaced, and contacts are cleaned. But if the problem lies in the winding, then the device will have to be completely changed.
- The problem may also lie directly in the sensor itself. To start the ventilating unit, you will need to reset the terminals from the device. Diagnosis of the controller is carried out by dismantling the thermostat and placing it in a container with hot water - the thermostat should open at this moment.
- Another reason, which happens quite rarely, is a break in the circuit. This problem can be diagnosed using a multimeter - broken wires must be replaced (the author of the video about diagnosing the regulator with your own hands is Dmitry Maznitsyn).
DIY fault repair
We will not talk about solving problems such as failure of fuses or the sensor itself. Everything is so simple here - failed elements are removed from their installation locations and replaced with new ones.
Separately, it is necessary to highlight the replacement of the ventilation unit - read about this below:
- So that during the repair process you do not have to dismantle the radiator, do everything carefully, since there is a possibility of damage to other elements.
- Open the hood and disconnect the battery. Remove the air filter.
- Having done this, you can dismantle the radiator grille.
- Next, you will need to unscrew the top mountings of the optics - the right and left lights.
- Using a 10mm wrench (it will be more convenient to take a socket wrench), you will need to remove the upper front panel.
- After these steps are completed, you will need to disconnect the plugs that are connected to the ventilation unit. Having done this, the wires can be twisted a little.
- Next, using a wrench, you will need to unscrew the four screws that secure the device to be replaced. The arrows in the photo indicate the screws that secure the assembly; they will need to be unscrewed.
- Only after the unit is freed will it be necessary to dismantle it and replace it with a new one. After removal, just in case, clean the connectors themselves so that in the future you will not be bothered by the problem of poor contact. Further assembly of the system and installation of all elements is carried out in the reverse order.
How to make a replacement yourself
Replacement of the Lada Priora DTOZH is carried out only after the preparatory work described above. For this purpose, disconnect the wires from the part along with the terminal and unscrew it. The most convenient way to do this is to use a 19 mm deep socket. As soon as the sensor begins to give in, it is unscrewed and removed manually.
Sequence of actions when replacing a temperature detector:
- Find the negative wire and remove it from the battery;
- A little antifreeze needs to be drained;
- Press out the plastic clips;
- Disconnect the wires;
- Loosen the tension a little and carefully unscrew it;
- Replace the sensor and perform all steps in reverse order.
- Add antifreeze back.
Change this spare part at least once, and it will become clear that the procedure does not present any particular difficulties.
Why does the fan switch sensor not work on Kalina and Priora and what to do about it?
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.
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 for sensor malfunctions
So, for what reasons on Kalinas and Prioras, and on all VAZs in principle, the controller may not work:
- The first reason is the thermostat not working. This problem is one of the most difficult; when it occurs, the fan will not work correctly. To make sure that the thermostat is working, you will need to touch the lower hose - if it is cold, then the device has really failed. In general, for Kalina, thermostat failure is a fairly common occurrence.
- If the thermostat is working, then it is necessary to diagnose the safety elements. You should also check the condition of the circuits themselves; use a multimeter to do this. The fuse diagram should be indicated on the back of the unit cover. In the case of Kalina, the unit is located under the dashboard, you are interested in fuse element 3, its capacity is 50 amperes. If the fuse is working, then you need to diagnose the fan relay, it is marked with the number 1. If these elements are working, you will have to remove the fan control unit - to do this, move the air duct and, using a 10-mm wrench, unscrew its fastening. There should be two relays on the block, they should be checked.
- It would also be a good idea to climb into the engine compartment and ring the contacts of the fan itself. The problem may be a break, broken wiring, oxidation of contacts, or a burnt-out winding inside the device. Problems with wires and contacts are solved without problems - bad wiring is replaced, and contacts are cleaned. But if the problem lies in the winding, then the device will have to be completely changed.
- The problem may also lie directly in the sensor itself. To start the ventilating unit, you will need to reset the terminals from the device. Diagnosis of the controller is carried out by dismantling the thermostat and placing it in a container with hot water - the thermostat should open at this moment.
- Another reason, which happens quite rarely, is a break in the circuit. This problem can be diagnosed using a multimeter - broken wires must be replaced (the author of the video about diagnosing the regulator with your own hands is Dmitry Maznitsyn).
Modernization
If you want to improve the operation of your radiator fan on the VAZ 2109, we offer the appropriate instructions.
To upgrade, you will need to install a second sensor and modify the system somewhat.
- The standard power sensor will be responsible for the operation of the fan at maximum speed.
- An additional sensor will include a reduced speed. It is installed at the top of the cooling system.
Now let’s talk more specifically about how to organize all this.
- Take a temperature sensor whose response temperature is similar to the standard regulator.
- Install it in the upper pipe fitting to the radiator.
- To mount the element, you will need a pair of washers and a nut. Be sure to lubricate the washer with sealant to prevent leakage from the installation hole.
- Buy a resistor to install on the stove fan. It has several outputs, so if desired, you can make several operating speeds.
- It is necessary to make an additional control circuit. Through it, less voltage will be supplied to the motor winding.
- The temperature sensor located in the upper part of the cooling system is responsible for turning it on.
- It is better to do control not by plus, but by weight.
- The system will work through a button in the cabin. To the left of the dashboard there is a grille with two plugs. Cut out one of them and set it to turn off on two modes. You can take the heater switch from a VAZ 2107.
- In the first position the low frequency will be switched on, and in the second – the maximum speed.
- One common wire is fed to the minus.
Such modernization is not provided for by the design of the VAZ 2109. These are modifications made by car enthusiasts. Therefore, installing a second sensor is entirely your personal responsibility.
The fan is an important component of the cooling system of VAZ 2109 injection and carburetor engines. If you wish and have time, you can easily replace or repair it yourself.
For owners of classic cars it becomes one of the important problems. In addition to various nuances that lead to overheating, a non-working radiator fan
almost always, on a hot day, it causes boiling. Why it may not turn on and how to find the reason, you can learn more about this in this publication.
Cooling fan does not turn on on Priora | Automobile magazine pol-z.ru
If it turns out that the cooling fan on the Priora does not turn on, then it is initially worth studying the main causes of this malfunction and taking a number of measures to eliminate them. So, I want to go through the sequence:
- The fan itself could have failed;
- Water got into the fan connection chip and, as a result, the contacts were damaged and should be replaced;
- The fuse supplying the fan has failed, as a result - replacing the fuse on the Priora;
- Failure of the thermostat (possible manufacturing defect);
- There could be a malfunction in the ignition control;
- The fan rotor could simply be jammed;
- The thermostat is not adjusted correctly.
VAZ 2170 | Checking the cooling fan | Priora
A faulty fan can cause the engine to overheat. If the fan breaks during a trip, you should stop, let the engine cool, and then drive at medium speed to the nearest car service center. During such a trip, be sure to monitor the coolant temperature and the engine overheat warning light. If necessary, stop for a while to allow the engine to cool.
If the fan does not turn on when the engine warms up at the right time, check the thermal switch located on the side of the radiator:
– turn on the engine and let it run until the fan turns on;
– slowly remove the expansion tank cap, gradually releasing steam;
– Place the thermometer in the expansion tank. The temperature should be between 92-97° C. At this temperature, the fan runs at first speed. At temperatures between 99 and 105° C, the fan operates at second speed. If the fan does not turn on, then unplug both wires from the thermal switch and connect them to each other. Turn on the ignition. The fan should turn on immediately. If this happens, replace the thermal switch and then test again.
The fan motor is protected by a fuse that may blow. If the fuse is OK, check the fan motor:
– disconnect the wire plugs and install a jumper between the red-black wire terminal and the positive pole of the battery;
– connect the terminal of the brown wire with the negative pole of the AB using a jumper.
If the fan does not work, replace it. The cause of the malfunction may be damaged wires.
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Lada Priora fuses: where are they located, replacement - AutoExpert
These include air conditioning, heated and controlled side mirrors, front airbags, a primitive ABS system, and if we compare the old “ten” modifications, then also electric power steering. Each of these electrical circuits is controlled by a relay and protected by appropriate fuses. All of them are distributed and located in separate blocks.
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