The gauge of temperature of a cooling liquid VAZ 2110, 2114

The full operation of the engine depends on many factors, in particular, on the working condition of the parts adjacent to it. So that the motor does not overheat, it is necessary to constantly monitor the cooling system. The main function in it is performed by the engine coolant temperature sensor .

The main functions of the engine cooling system

The engine during operation reaches critical temperatures, which can disable more than one mechanism in the car. To avoid such incidents, it is necessary to remove excess heat from its details. This function is provided by the cooling system, which also:

• Accelerates engine warm-up to operating temperature.
• Heats the air in the cabin.
• Cools the exhaust fumes.
• Cools the lubrication system.

The cooling system can be of three types:

• Liquid - cooling occurs due to liquids (antifreeze, antifreeze, water).
• Air - cooling takes place by blowing air.
• Combined - mixed type.

Most cars, including the VAZ, are equipped with a liquid cooling system with the use of antifreeze. It includes:

• Radiator with fan.
• Radiator of the stove.
• Cooling shirts.
• Water pump.
• Expansion tank.
• Connecting pipes.
• The gauge of temperature of a cooling liquid VAZ 2110.

The coolant passes through the system in two circles:

• Small circle. This is the initial movement of the fluid, which does not yet involve the radiator. Passing a small circle, water or antifreeze provide engine warm-up.
• On a large circle, the liquid begins to go when the temperature of the engine reaches one hundred degrees. The thermostat opens and the antifreeze begins to enter the radiator, where it cools. If it does not manage to cool down with further heating, a fan enters into operation, which additionally cools both the radiator and the motor itself.

Why do we need all kinds of sensors?

The engine coolant temperature sensor VAZ 2110 is not the only car sensor. There is a huge number of all kinds of devices, with the help of which the process of controlling the engine is made.

All sensors perform the function of receiving information about the status of the control object. Then this information is transferred to the controller. He, in turn, plans or adjusts the operation of all systems in the machine.

For example, an air temperature sensor in the cabin is needed to control the climate inside the car. When it's cold, the stove turns on when it's on, and when it's hot it's the air conditioner. Thus, in addition to providing a comfortable stay, frost protection is also prevented.

A speed sensor is required for driving at idle speed. The throttle position sensor is used for correct calculation of the fuel / air mixture. And thanks to the fuel level sensor, the driver always knows how much gasoline he has left in the tank, and can not worry that he will not reach the refueling.

The cost of such devices is very different - from 150 rubles to several thousand. One of the most expensive is a mass air flow sensor. The price of some of its models reaches 7,000 rubles.

The gauge of temperature of a cooling liquid (VAZ)

This device is a semiconductor resistor with a negative temperature coefficient. It is installed in the engine cooling system on the thermostat housing. Resistance depends on temperature. At low temperatures, the resistance is high, and vice versa.

The signals of this device are fed to the electric engine control unit. The ECU, on the basis of the readings, corrects the flow of the fuel mixture. If the engine has not warmed up yet, an enriched mixture is fed.

When the sensor is faulty, the ECU receives incorrect temperature readings, causing the engine to overheat and lose its functionality. Therefore, with the replacement of the device it is better not to tighten.

Engine coolant temperature sensor VAZ 2110: signs of malfunctions

In order for the sensor readings to be correct, it must be correctly installed, namely - near the thermostat housing, and its tips should touch the coolant. If the device's indicators are inaccurate, the first and significant reason may be its incorrect installation. False readings will be also when the coolant is at a critically low level.

Anyway, the sensor's problems can be judged by the following signs:

• Low quality of exhaust gases.
• Increased fuel consumption.
• Deteriorated composition of exhaust gases.
• Low engine controllability.
• Error code or flashing of the engine overheating lamp.
• Fetching start.

Before "sin" on the sensor, you should check the condition of the wiring and connectors. Often breakdowns are only related to wires.

External diagnostics of the sensor can also talk about its inoperative state - corrosion and various deposits make it unsuitable. The resistance of the device is checked with a special device - a voltmeter or a multimeter. The thermistor sensor in the cold state shows a voltage of 2 V, while in a hot one it indicates 0.5 V. Other indications indicate that it is not suitable.

We change the sensor by our own hands

Despite its size and simplicity, the coolant temperature sensor plays an important role in cooling the engine. It so happens that his testimony is inaccurate. In this case, the device should be changed.

The coolant temperature sensor must be replaced in the following order:

1. Drain fluid, it's better all.
2. Disconnect the battery.
3. For practicality, remove the air filter.
4. Disconnect the ignition and disconnect the sensor connector.
5. Using a key (at 19), unscrew the sensor and remove it together with the O-ring.
6. Installation is carried out in the reverse order.

A similar device is a relatively inexpensive part of a car. A new coolant temperature sensor (2114, 2110, 2109, as well as other VAZ models) can be purchased on average for 200 rubles. The failure of this device is a widespread breakdown. Absolutely any driver can cope with the replacement process. A sensor is a small, but very important detail. If he starts to "junk", it is better not to delay repair - it's more expensive!

A few words at a time

Whatever one may say, the functionality of the engine depends on the adjusted operation of all sensors of the system. After all, with their help you can learn about the state of a certain detail and adjust its work. The temperature sensor of the coolant VAZ 2110 is one of the main instruments. Its malfunction can lead not only to increased fuel consumption, but also to engine overheating, which in the future is fraught with damage. And the new motor, in comparison with the sensor, is a whole financial condition!