How to change the temperature sensor on the VAZ. Cooling fluid temperature sensor How to check on VAZ and foreign cars? What is the temperature sensor for what is needed

Is one of the measuring instruments modern car. Like any device, it can fail. The article discusses its functions, typical malfunctionsThis is given a replacement instruction.

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Features of the work of Dzhu on the fifteenth model of VAZ

The coolant temperature sensor (DPT) refers to the cooling system of the machine. Its appointment to control the temperature of the coolant. As long as the engine is cold, the computer installs the enriched TV, after the engine warms it, it becomes normal.

The device is a resistor called a thermistor placed in a metal housing.

The resistance of the thermistor with a decrease in temperature is growing, at the same time the voltage that enters it will increase.

Possible sensor malfunctions

When breakdown, EUBU believes that the engine temperature is zero, therefore enriches the combustible mixture. The breakdown device needs to be changed as quickly as possible. Most often, the fault of the meter is a disturbance of graduation. In this case, the resistance changes incorrectly, and since the control unit is based on the meter readings, then it works incorrectly.

It is possible to identify the malfunction of the DVT by turning on the fan. It should be turned on if valid values \u200b\u200bare exceeded. True, there is another fan switching sensor, which can also fail.

Thus, the fan may not be turned on if:

• contacts oxidized;
• damaged wiring;
• faulty sensors.

Incorrect operation of DPT leads to increased flow Fuel, detonation, high idling.The most dangerous - if the engine temperature sensor is broken. In this case, the fan does not start, there is no engine cooling, it overheats, and as a result, due to this, the cylinder head can be tested.

Ways to check the regulator for performance

Before checking the meter, you should first check the safety of the fuses, the integrity of the wiring and measure the incoming voltage, which must be 5V. If there is no wiring disorders and voltage normally, the counter to resistance is checked. To check it, it needs to be removed (by video author - device and repair of the car).

An electric kettle will need an electric kettle, the thermometer for measuring the outer medium temperature and the multimeter mounted to the resistance measurement mode.

Thermometer is desirable to take not for measurement outdoor temperature air, and electronic.

There are two ways to check:

1. When the thermometer is first, it is placed in an electric kettle. In this case, the device must be connected to the test. An electric kettle should be included in the network and monitor readings. With increasing temperature, resistance should grow. When it becomes +15 degrees, the resistance must be 4450 ohms, +40 - 1459 ohm. At 100 degrees, resistance reaches a minimum - 177 ohms. If the values \u200b\u200bare different, it speaks of a malfunction.
2. If there is no thermometer, the meter is checked after the water boils. When immersed in just boiling water at the multimeter should be displayed a slightly more than 177 ohms. Otherwise, the device is Paul.

Instructions for replacement

To replace, you need to buy a new cooling fluid sensor VAZ 2115. It should be checked for performance before installation.

Replacement - the procedure is simple and consists of a sequence of actions:

1. First you need to either drain all the coolant from the system, or only part.
2. Next from the counter you need to disconnect the wires.
3. Then use the key to unscrew the device.
4. Now a new one is installed in the place of the removed meter. Planting place It should be carefully cleansed from pollution.
5. Then join the wires. Next is poured antifreeze according to the level, which shows the coolant level sensor.

Everything is done on the cooled engine in order to avoid burns!After the replacement, it is necessary to check whether the liquid in the connection site does not proceed.

For proper operation of the engine and the economical fuel consumption, it is necessary to monitor the state of nodes and car meters. The ability to make a replacement of DPET with your own hands makes it possible to save on a service station and to eliminate the malfunction in the event of a device breakdown.

Any driver should know the temperature of the engine of its car. This also applies to the owners of the VAZ 2106. Noticeability of the critical engine temperature can end with overheating and jamming. Behind the motor temperature on the VAZ 2106 monitors a special sensor. He, like any other device, sometimes fails. Fortunately, the temperature sensor can be changed independently. Tell me how it is done.

What is the temperature sensor for what is needed

The main function of the seventh temperature sensor is to control the heating of antifreeze in the motor and display information on dashboard car. However, these functions of such sensors are not limited.

In addition, the sensor is connected to the automotive control unit. Data on the motor temperature is broadcast and there. And the block, in turn, depending on the temperature obtained, makes amendments when filing fuel mixes In the motor. For example, if the engine is cold, the control unit, based on the previously obtained data, will install the enriched fuel mixture. This will allow the driver easier to start the car. And when the engine warms, the control unit will make the mixture of the poorer so that the machine suddenly stalls. That is, not only the driver's awareness of the motor is depeted from the correct operation of the antifreeze sensor, but also fuel consumption.

How the temperature sensor works on the VAZ 2106

The main element of the sensor is the thermistor. Depending on the temperature, the resistance of the thermistor may vary. The thermistor is installed in a hermetically brass case. From the outside the contacts of the resistor are displayed. In addition, there is a thread on the housing, which allows you to screw the sensor into the regular socket. Contacts on the sensor two. The first is connected to the electronic unit of the car. The second is to the so-called mass.

To operate the thermistor in the sensor, it is required to submit a voltage of five volts on it. It is served from the electronic unit. And the stability stability is provided by a separate resistor in the electronic unit. This resistor has permanent resistance. As soon as the antifreeze temperature in the engine rises, the resistance of the thermistor begins to fall.

The voltage that is served on the thermistor, also drops sharply. Fixing the voltage reduction, the control unit calculates the motor temperature and displays the resulting digit to the dashboard.

Where is the temperature sensor

On VAZ 2106, temperature sensors are almost always installed in sockets on the cylinder blocks.

In later models "Sixok" there are sensors installed in thermostat enclosures, but it is a rarity.

This sensor is almost on all machines next to the nozzle along which the hot antifreeze goes into the radiator. This location allows you to shoot the most accurate temperature readings.

Signs of sensor breakdown

It is believed that the temperature sensor on the VAZ 2106 is a reliable device, since its design is very simple. Nevertheless, problems may arise. As a rule, all problems are associated with a change in the resistance of the thermistor. Due to the changed resistance, the operation of the electronic unit is disturbed, which receives erroneous data and cannot correctly affect the preparation of the fuel mixture. Understand that the sensor is faulty, it is possible by the following features:

With all the above problems, the driver will have to change the temperature sensor. It is not subject to repair, so the campaign in the auto parts store and replacing the device is the only rational option. The price of sensors on the VAZ 2106 begins from 200 rubles.

Temperature sensor test methods

If the driver wants probably to make sure that the antifreeze sensor is the cause of problems with the machine, it will have to carry out a simple test procedure. But before you begin to it, you need to make sure the integrity of the automotive wiring. As mentioned above, so that the sensor worked normally, it is necessary to continuously feed the voltage of 5 volts. To make sure that the supplied voltage does not deviate from this value, you should start the machine, and then remove the wire sensor and connect them to the multimeter. If the device clearly shows 5 volts, then there are no problems with the wiring and you can proceed to the survey of the sensor itself. There are two verification methods. We list them.

Hot water check

The sequence of actions in this embodiment is simple.

Table: Temperatures and corresponding resistance, characteristic of good sensors VAZ 2106

Check without an electronic thermometer

This method of checking the sensor is simpler than the previous one, however, less accurate. It is based on the fact that the temperature of boiling water reaches a hundred degrees and does not rise above. Therefore, this temperature can be used as a checkpoint and find out what the sensor resistance will be equal to one hundred degrees. The sensor is connected to a multimeter switched to resistance measurement mode, and then immersed in boiling water. However, one should not expect that the multimeter will show resistance in 177 ohms, which corresponds to a temperature of one hundred degrees. The fact is that the water temperature in the boiling process is constantly reduced and averages 94-96 ° C. Consequently, the resistance at the multimeter will vary from 195 to 210 ohms. And if the numbers issued by a multimeter differ from the above more than 10% - the sensor is faulty and it is time to change it.

Replacing antifreeze temperature sensor on VAZ 2106

Before changing the antifreeze sensor on the VAZ 2106, several important nuances should be taken into account:

• the car engine must be cold. After unscrewing the sensor, antifreeze begins to flow from its socket. And if the engine is hot, the antifreeze does not flow out of it, but is thrown out of a powerful jet, since the pressure in the hot engine is very high. As a result, you can get strongest burns;
• before you buy a new sensor in the store, you should carefully examine the labeling of the old one. Almost on the entire VAZ classics, the same sensor with TM-106 marking is used. It should be purchased by it, since the correct operation of other sensors is not guaranteed by the manufacturer;
• before replacing the sensor, remove both terminals from the battery. This will avoid a short circuit, which is possible when leakage of antifreeze and enter this fluid on the wires.

Now about the tools. We need only two things:

• horn key to 21;
• new antifreeze sensor on VAZ 2106.

Sequencing

The sensor replacement consists of two simple steps:

Instructions for use VAZ 2106 prescribes before replacing the sensor completely merge the cooling fluid from the machine. The vast majority of drivers do not do this, rightly believing that it is not worth changing the entire antifreeze due to such trifles as a sensor. It is easier to change the sensor without any plots. And if the antifreeze flowed a lot, it can always be addressed to the expansion tank.

Video: Change the antifreeze sensor on the "Classic"

So, the replacement of the antifreeze temperature sensor is a task that is quite forces even a vehicle motorist. The main thing is not to forget to cool the engine's engine well, and then act as more than you can. And everything will work out.

Modern cars are equipped with a large number of sensors whose task is to follow the state of all car nodes. One of the most important sensors is the coolant temperature sensor (DPET), which is located in the engine compartment.

Despite its importance - a relatively simple sensor, its task is to monitor the condition of the coolant (coolant) in the cylinder block shirt. The temperature sensor reports in a timely manner for changing the temperature of the coolant, after which it transmits this information to the electronic unitmanagement (ECU).

Duzh is not only a temperature sensor, since its testimony is capable of affecting many engine systems and to work the engine itself as a whole. Thus analyzing the signal from Dzhto, the computer monitors the engine systems, if necessary, adjust. For example, an electronic control unit can make an adjustment fuel system, Elements of power and other engine nodes. That is why it is necessary to constantly monitor the health of the cooling fluid sensor, in case of detection of interruptions in its operation, it is immediately replaced. A faulty sensor is able to distort the data entering the ECU, and this is fraught with large troubles.

Dot Frequently confused by S. Datuja (Cooling fluid temperature sensor). The difference is that the second displays information on the instrument panel, in order to keep the motorist asking about what is happening in the engine, in essence about the temperature of the coolant. While Dzop works with the ECU, which, after receiving information about high temperatures Co. - turns on the fan.

Today I will share with you how to check the temperature sensor of the cooling fluid VAZ 2114 with their own hands.

How to remove Dzh Vaz 2114?

1. The sensor is located on the inlet pipe of the cooling shirt, in order to remove it, it is necessary to remove the air filter.
2. Remove the "minus" wire from the battery.
3. Next, it is necessary to merge with the radiator.
4. Disconnect the wiring of the sensor.
5. Using the key NA "19" or "21" loosen the tighten, then unscrew it with your hand.

How to check the coolant temperature sensor?

1. The removed DRP must be put in the container of the coolant.

2. After it is necessary to gradually heat the container, while monitoring the temperature on the thermometer and the indications of the ohmmeter of the connected to Dzh.

Cooling fluid temperature sensor test

• 20 ° - 3520 OM
• 40 ° - 1459 OM
• 60 ° - 667 OM
• 80 ° - 332 OM
• 100 ° - 177 OM

If the readings of your sensor do not correspond to this table - the replacement of the temperature sensors of the coolant BAZ 2114 is needed. I draw your attention that the DTO repair itself is not subject to repair. If it turned out that your sensor is working, then the malfunction must be sought elsewhere, for example in

Drivers who regularly drive around the country tracks often see the following picture: there is a passenger car with a hood lifted, from motor compartment There is steam. The reason for this situation is most often the temperature sensor. In one case, the vehicle himself is to blame for the vehicle, he did not notice the temperature excess, and in the other - the electronic element was worn out. The cooling fluid sensor (DPT) is rarely breaking, but if it happened, the urgent replacement is required. After studying this material, the reader finds out what working temperature Motor, why the VAZ 2110 engine is heated, how to check the DPU and how to replace / install a new element in a car where an injector is worth it.

Operating temperature and reasons for engine overheating

Under normal conditions, the circulation of coolant provides a temperature of 86-90 ° C. In the hot period, the indicator may be retarded, then after turning on the fan, the temperature stops at 94-108 ° C. Frequent question of car enthusiasts: What is the temperature in winter in frost? The first 10-15 kilometers the indicator may be below 80 ° C, but after this turn it should rise to 85-90 ° C. These data are suitable for VAZ 2110 injector.

Also, the operating temperature depends on the type of firmware, the speed of turning on the fan and other features, so the normal indicator is 90-105 ° C.

Now you know what normal working temperature VAZ 2110, so it's time to study the reasons for its exceeding. If the "culprit" of the overestimated indicator is not deductible, then you should take the following actions:

• Check the outer part of the radiator for the presence of contaminants.
• Replace the thermostat in the VAZ 2110 injector.
• Check the coolant level in expansion tankIf it has become little - to add to the desired mark.
• Adjust adjustment of the installation point setting.
• Perform the fan turning on.

The purpose of Dzop and its location

Engine temperature sensor is an electronic device that performs the operation of the resistor. Its resistance varies depending on ambient. To work, you will need a standard set of tools. In the "dozen", the electronic device is installed on the head of the cylinder block.

In all cars, the temperature sensor performs temperature control power plant. Also, this element is responsible for emergency start of the fan. If the driver has the initial electrical appliance skills, then you should not go to the car service, it can be replaced by yourself.

Sensor check

For testing, you will need a multimeter. The coolant temperature sensor is checked as follows:

1. The element is dismantled from the car (the process is described in the removal and installation instructions in the next section). Next, you need to prepare a container fully filled with coolant;
2. Now it is necessary to heat the capacity and place the coolant sensor in advance is pre-connected to the multimeter. An important point - you need to know the temperature in the container to determine whether item works or not. It will help in this table. For example, if in the tank 40 ° C, then the resistance should be about 1459 ohms;
3. If the operating temperature does not correspond to the resistance (or vice versa), the item is faulty, the replacement is required, since it is not subject to repair. If the deviation is small, you should simply clean the surface of the sensor - it can solve the problem.

Dismantling and installing a new element

Before changing the fan power sensor, you must remove all liquid from a car radiator. After that, you can proceed to replace and install a new element of the VAZ 2110 Injector to turn on the fan:

1. FROM rechargeable battery It is necessary to disconnect the minus terminal - it will protect against a short circuit that can occur while dismantling the electronic element;
2. Next, you should disconnect the block of wires, as shown in the photo:
3. Now that the wires do not interfere, you can completely twist the temperature sensor VAZ 2110 injector. The process is performed by a wrench;
4. Before removing, it is necessary to check whether the element from the terminal and cylinder mounts is completely disconnected. Next, the element should be obtained from the opening of the exhaust pipe;
5. Installing a new cooling fluid sensor for turning on the fan passes internally by the same scheme. Differences must be considered separately. The new DRP must be placed in the opening of the exhaust valve on the head of the cylinder block. Using a wrench, it must be wrapped until it stops;
6. After that, you can connect the wires that were disconnected while dismantling the faulty DPT;
7. The coolant sensor for turning on the fan is installed. It remains only to pour the working fluid into the radiator. It is desirable that she was new. It is also not recommended to mix new working fluid with old. The completion step will be the connection of the minus terminal. Ready!

Important moment! A sealing gasket is present on the DRP housing. When removing the DRP, you need to follow so that it does not fall into the hood. The gasket may be needed when installing a new sensor, since the gasket may not enter the DPET set.

Conclusion

If the VAZ 2110 engine is heated due to Dzh, then the problem can be solved with their own hands, in other cases the repair process will be more difficult. What engine operating temperature should also know each owner of this model. If the experience of repair and replace electricity is missing, it is better to entrust the work of professionals from car workshops.

The coolant temperature sensor or, in a reduction, DPT, is a device that determines the temperature of antifreeze in the cooling system and the resulting signal to reduce it by triggering the fan.

His performance is an important aspect of the normal functioning of the cooling system and everything power aggregate In general, because in this material we will talk about what signs of malfunction of the DRP helps to identify problems in its work and effectively eliminate them.

Duzh - what is it in the car?

The coolant temperature sensor in the car is a compact device located in the radiator housing or, often, in the outer part of the case of the power unit - the so-called "shirt" of the cooling system.

Purpose

The sensor is intended to determine the temperature of the coolant, which is displayed on the information indicator located in the auto instrument panel.

Also, the sensor function is to activate the cooling fan, which lowers the antifreeze temperature in the event that it exceeds the critical values \u200b\u200b(more than 80 degrees Celsius). This is done in order to avoid boiling antifreeze and, as a result, overheating of the motor.

Video - nuances associated with cooling fluid temperature sensors on Volkswagen Passat B3:

Similar sensor purpose was characteristic of carburetor engines. Today, with development injector systems Injection, the DHUT is a much larger number of functions. These include:

• increase engine speed at the warming stage to optimize the output of the motor to the operating mode;
• opening or closing the exhaust gas recycling valve;
• installing the ignition advance angle, etc.

Principle of operation

The functioning of the DVT is based on the physical properties of the sensor material to change its own electrical resistance depending on the degree of heating.

In essence, it consists of two electrically conductive contacts and a cone-shaped working element from a sensitive material. The change in the degree of electrical conductivity is fixed and, thus, the sensor "gives" information about the temperature and achieving its critical values.

On modern cars for reading such information "answers" the electronic control unit of the ECU, which gives control commands for the ignition system, and also analyzes the performance of the sensor itself.

Views

Conditionally, you can select two types of DH: mechanical and digital. What are their similarities and differences?

Mechanical

Mechanical DPE is a simple node, where the transmission of information about changing the resistance of the material is performed, so to speak, in the "analog" form - by means of an electrical signal. Such a sensor is directly connected to the coolant temperature pointer, which is essentially a simple ohmmeter with a scale, graduated in degrees Celsius.

The node is connected by a relay that closes when the critical temperature is reached and the cooling fan is triggered. Such sensors are found on cars with carburetor engines, including all domestic "Zhiguli".

Digital

Digital DPT on its design is not very different from mechanical, but the signal transmission occurs by the tire directly into the digital control unit of the ECU.

The built-in processor produces a primary analysis of information, output the temperature data on the dashboard, as well as giving commands to the ignition system. The inclusion of the fan in this case is also made by the command from the ECU.

What is influenced by

The main task of the cooling fluid temperature sensor is to turn on the cooling fan. As a result, in the case of its malfunction of the fan, it does not occur, and the result of this can be overheating the motor or, at least, boiling antifreeze in the system.

Video - How to check the DRP Multimeter:

Besides injector engines The malfunction of the DPE leads to the fact that the ECU exposes the wrong ignition advance angle, and the engine begins to work in adverse conditions.

The combination of these factors suggests that the timely definition of the damage to the sensor and its replacement is a key element that avoids a number of problems, and sometimes expensive engine repair.

The main causes and signs of the coolant temperature sensor fault

As a rule, in view of the simplicity of the design, the breakage of the coolant sensor itself is relatively rare. Nevertheless, "reasons" so that it began to give failures, quite a lot, and these are the following reasons:

1. Low quality antifreeze

In the case of using a bad frequent case when the surface of the sensor is extended or covered with a crystalline precipitate. In this connection, the temperature effect on the sensor changes and, as a result, its testimony is changed, as a rule, towards improving the temperature. This leads to the late inclusion of the cooling fan, as well as a change in the mode of operation of the power unit.

2. Poor quality of the measurement of the sensor itself

Unfortunately, there is a large number of counterfeit spare parts on the market, and the DRP from the NO-NAME manufacturer does not always meet the factory parameters. Also, the sensor may have minor damage, which during operation can contribute to its failure.

3. Antifreeze leaks through the threaded sensor connection

And, as a result, changing its indicators. Such a phenomenon is found in disruption of the integrity of the thread in cases where the sensor was installed with excessive force on the tighten or there is wear-liner wear.

4. Disruption of electricians

This factor is the main reason for the failure of the sensor and can be caused by a number of reasons - from a sharp voltage jump in the onboard electrical system of cars to normal corrosion of contacts. Actually, checking contacts for the presence of oxidation should always be done when removing or installing the DTP.

5. Malfunction of thermostat.

How to check the coolant temperature sensor

In the case of suspicion of malfunction, the Dzhu is necessary, first of all, to determine whether the breakdown of the sensor itself or the cause is the failures in electrical system Auto.

To do this, you need to unscrew the sensor and to diagnose it. This can be done using the usual household multimeter.

How to check the dot multimeter

To measure the resistance of DPET at different temperatures on the multimeter, the module mode should be enabled with the corresponding measurement limit.

The resistance value must be in a specific range at specific temperatures.

For each model of the power unit and the car brand, the sensor resistance at different temperatures of the liquid has its own values \u200b\u200b(!) And with them one should read in advance in Manul!

To check the sensor, it should be removed and immersed in water heated to a certain temperature, connecting the multimeter to the output contacts of Dzh. If the sensor resistance does not match the values \u200b\u200bspecified for the engine of your car, it should be replaced.

Video - How to check the coolant temperature sensor with a multimeter and electric kettle:

In addition, the measurement can be made directly on the car as the engine is warmed under idling.

In case the sensor is operational, search for the causes of the breakage should be in an electrician or thermostat. If it is malfunction, it should be replaced.

Replacement

The replacement procedure of the DRP is extremely simple and lies in the winding of the old sensor and installing a new one with the subsequent connection to the control terminals.

Nevertheless, there are some nuances. In particular, the replacement makes sense to combine with the replacement of the coolant in the car engine. In this case, the landing socket for the sensor is not bad to process graphite lubricantWhat will allow to protect the threads, to ensure easy winding and create an additional sealing layer.

Video - replacement of the cooling fluid temperature sensor on VAZ 2115:

Also during the replacement of the sensor, it is necessary to handle electrical contacts with small emery paper suitable for it. If DRP is correct, and you do not plan to change it - it makes sense for the prevention to clean it, including sanding its contacts to improve electrical conductivity.

Conclusion

As you can see, checking and replacing the DRP - the procedure is quite simple. It does not require specialized skills and knowledge, as well as special equipment (with the exception of the mentioned multimeter).

Remember that the timely replacement of a faulty coolant temperature sensor will avoid a number of problems, including possible overheating of your car power unit.

Video - How to check the coolant temperature pointer on Chevrolet Lacetti:

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Comments on the article:

Ivan.

To learn about whether Dood works quite easily, provided that you have a car with an injector. The car during the cold start will start to start and work well, but as soon as the engine warms up, the uneven operation of the engine will begin, and it will be almost impossible to run the car with a hot engine due to the re-entered mixture.

Anton

In my Passat 2 sensor. One for the pointer on the tidy - does not affect the operation of the engine, and the other gives a signal to the ECU - this is the main one.

Karina

Because I'm just a novice driver, I learned a lot, in fact it is very easy to check the coolant temperature sensor.

Maxim

In my Corolla Fielder there was a coolant temperature sensor malfunction, the computer began to adjust the engine operation under his testimony, problems began. The article is well described how to check it! Help!

Valery

I did not know that it was so easy to check the sensor, went to check, the benefit of the multimeter is available. Unscrew, measured, calmed down - FIRST.

Peter

If the coolant temperature sensor deterves to respond immediately. After all, roughly speaking, it is it that gives a signal to the launch of the cooling fan. And even if the sensor is defective increases the consumption of gasoline. In this case, I check the entire wiring of the car and if you make sure that the reason in the sensor replaces. Replace it with your own hands simpler simple, you only need to see or try it yourself.
You need to unsalted the old sensor, handle the nest with graphite lubricant and put on its place new, control terminals, too, do not forget to attach. The main thing is to be hermetically.

Andrew

The first thing you need to know is that in the car is not a single temperature sensor. There are at least two of them, but in some models and up to 4-5. The second is where they are located and specifically for what each of them responds. The classic scheme is two sensors, one goes to the panel arrow in the cabin (or in digital form), and the second on the fan (s) of cooling. Accordingly, the principles of work are different, they must be checked in different ways. The first changes its resistance in linear dependence with the temperature of the coolant (at the same time, we see the change in the panel arrow deviation), and the second works on the ON / OFF principle when a certain temperature is reached (accordingly turns the fans accordingly).

Alexey Z.

In general, it is difficult to imagine how bad toosol or antifreeze can damage the temperature sensor, for twenty years I have not seen anything like that. The sensor housing is typically made of a copper or brass alloy, which practically does not react with the coolant. But the exit from standing due to poor-quality manufacture - the phenomenon is not rare. If those sensors that go on the machine from the plant serves several decades, then those that come in spare parts very often do not work out and three. Paradox, but those and these are released at one factory. Therefore, the buyer often prefers to take a sensor with disassembly than buy new.

Artyom

The fluid cooling sensor at the desired moment includes a fan and therefore if it is faulty it is fraught with serious failures and breakdown. Reasons for breakdown may be a few and non-quality antifreeze and cheap sensor. Sometimes the sensor can be both in charge, in some cases you need to check the wiring and contacts. It is necessary to unscrew the sensor and check it, immersing it into the water and takes the multimeter. Not so difficult, it is enough to replace it once in the presence of a knowledgeable person or find information on the Internet and will do it yourself. If the sensor is faulty, you need to replace it, just do not forget to clean the contacts and terminals.

San Sanych

In fact, multimeters of type D830 / DT830 (thousands of them) allow you to determine the temperature with an acceptable error. As testing points for checking, you can only use the water led to be used (something about 0 degrees is guaranteed) and the ethyl alcohol (~ 78.37 degrees) is guaranteed. The boiled alcohol is also convenient because it is the most critical point_, at which the coolant temperature sensor must steadily to work, in order not to turn out the antifreeze. And as already correctly noted in the comments, if the sensor at the specified temperatures shows the resistance in permissible limits (it is described in detail in the second video), then the fault lies either in poor-quality wiring or in poor quality antifreeze.

Maxim

I adepened to change faulty sensors without merging the coolant. To do this, it is necessary to pre-"break", sometimes, for a dozen years, the carving is exactly like that it is better to use the head or at a thin end of the cape. Then neat three fingers twisted, following the amount of fluid flowing. After dramatically remove the sensor and plug the hole with your finger. Translate the Spirit, take a free hand of a pre-cooked new Duh, bring to the hole that you keep your finger and vigorously (sharply) to shut them the hole to remove the finger. Next, screw in the thread. Luxury losses - 200 - 300 grams, and time saving is a few hours! Sometimes it does not even attach, the level does not go to a minimum.

Sergey

When checking, DPT is still taken into account specifications Cars according to the relevant tables to different resistance drops, but no normalized readings. With small deviations from the indicators, the sensor should not be changed, it is necessary to find another cause of failures in the engine. Sensors of various manufacturers always give different readings at the same fluid temperatures. Before troubleshooting with the sensor replacement, you need to pick up suitable option For your car. If you buy on the market, then be sure to check the certificate. To eliminate fakes, take a picture of this document for further presentation to the relevant authorities. Basically, with such actions, the seller will not sell you a fake.

Macarium

When the last models of the Volga car became equipped with fans of cooling fluid fans using such cars, the problem of rapid engine overheating occurs when the car in the rhythm of the urban movement. Whether the sensor was unreasonably tuned at the factory, or because the engines have become higher, and their work was allowed not at 80 degrees of heat as before, and already at 90. Drivers came up with manual forced fan inclusion, which was carried out directly from the driver's cabin . Drive the sensor command to turn on, and thus improved the stability of the car in traffic jams.

Nikolai

Native served 7 years. Last year I had to replace. We are talking about the sensor, which includes an additional fan (Niva Chevrolet). The first time I did not understand what happened. Summer, hot, the temperature rises quickly and the fan turns on frequently, especially when driving in the city. One day, noticed that the fans in a pair work too smart. In the morning, on a cold engine, the second turned on literally in a couple of minutes. Suffers on the relay, changed, but I did not solve the problem. He dug in the book, found this sensor near the pump, replaced and forgot about the problem.

Oleg

The failure of the coolant temperature sensor can lead to engine breakdown and very large financial losses, comparing with its value. Therefore, if there are doubts about it, it is better to protect yourself. I checked my sensor without removing it with a car. Just launched a cold engine and connected a multimeter to its terminals. Changed, pre-draining the cooling fluid (then replaced it). And about using the multimeter as a temperature meter does not agree: no accuracy, it all depends on the purity of the liquid. And yet, not to be with a superheated engine when the temperature sensor fails, the fan switch to the Salon is installed.

Dmitriy

In the auto sensor always next to the thermostat for the greatest measurement accuracy. When the sensor fails, and the instruments in the machine are sometime broken, the following problems may occur: the fuel consumption will increase, CO2 emission increases, can stumble the engine, there will be a slow warming of the car, can overheat the engine.
The work of the sensor can affect the old wiring, corrosion, and the sensor can be corrected. Therefore, it is better not to go, but buy a new sensor and immediately discard doubts about the causes of problems.
But it is best not to skit and acquire a new sensor that will ensure safe and pleasant driving without any problems.
If there are signs of the coolant temperature sensor fault, you can immediately make it replace. If there is a desire, you can conduct it to be diagnosed, but at the beginning, make sure that the wiring is managed. 5 volts must be fed to the sensor, which can be checked with the engine running. If 5 volts are, then check the sensor.
If desired, it is possible to draw it to the diagnosis to make sure that the sensor is the source of emerging problems. You can check with an electric kettle. Measure the temperature + 10, + 15, + 20. and write the resistance of the sensor.
If the readings differ from the data for the sensor (can be found in the internet), it means that the coolant temperature sensor is defective, and it is required to replace. Less accurately, but it is simpler without a thermometer, and boiling water - it boils at 100 degrees. It will be a checkpoint. Boiling resistance - about 210-190 ohms.

Oleg

The cooling fluid temperature sensor generates a number of problems, the main and most dangerous of them are as follows:
The output of the engine temperature beyond the permissible modes;
Violation of engine work stability;
Increased fuel consumption;
Falling turns and spontaneous engine stop.
In case of suspicion unstable work Temperature sensor, firstly, it is necessary to check the presence of coolant and its level.
Next, check the quality of contacts, for oxidation.
If all of the above is fine, then you need to check the sensor itself, for which it must be removed.
We take the sensor and lower it into a glass of boiling water and measuring its resistance, specific data can be found on the Internet for each sensor. If the data corresponds, then the sensor is normal. Otherwise, change the sensor.

Nikolai

Cooling fluid temperature sensor changed a week ago. I stand in a traffic jam in Moscow and purely looked at the instrument panel (I have Shevi Niva) and Oboml. The device shows about 110 degrees and silence - fans do not work. Included the accidents and on the road. At first I thought the fan engine, filed a voltage directly on the engine - it works. Connected the fan engine to the battery and while I drove in Moscow, he was constantly thought. I drove on M2 and disconnected the fan. Further to home. In the garage removed without checking the temperature sensor and set a new one. I launched the engine and waited for the warm-up - everything works.

Ivanovich

Cooling fluid heating sensor The device is very important for normal engine operation. It protects the engine from overheating, turn on and off the cooling fan. In his practice, I had to deal with the problem of his malfunction several times. In our domestic carsWith a mechanical ignition system, analog sensors were used. And now, if such a sensor suddenly refused to work, it did not include the fan and the water in the radiator boil on the right moment. It is impossible to go in such a situation and to understand the cause of the breakdown. We, first of all, checked the serviceability of the fan electric motor, connected its terminals to the power source bypassing the sensor. If the engine worked, the reason for it was not inclusion could be only a breakdown of the sensor. The sensor had to be changed, and to reach the car service or garage, practiced the inclusion of the fan directly and drove with a constantly working fan. In modern injector cars The principle of operation of the sensor itself is the same, only the control of the operation of the fan goes through the electronic ignition control unit.

uA9ukh.

Temperature sensor when checking a multimeter resistance will be normal and when heated in hot water will be fine in the thermostat, the temperature failures will be able to float on one or two degrees not constantly and the engine will tick it onto the cold when the temperatures will be 10 or on 20 degrees swim with the fan turn on and there will be an error P1336 ignition skip in all cylinders