Coolant temperature sensor VAZ 2110, 2114

The full operation of the engine depends on the set offactors, in particular from the healthy state 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 at work reaches criticaltemperatures that 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 warming up the motor 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 occurs 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 cooling liquid passes in the system 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 starts to go then,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 the radiator and the motor itself.

Why do we need all kinds of sensors?

Engine Coolant Temperature Sensor VAZ 2110- not the only car sensor. There is a huge number of all kinds of devices with which help the process of engine control is made.

All sensors perform the function of receptioninformation about the state 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 cabinIt 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, the air conditioner. Thus, in addition to providing a comfortable stay, frost protection is also prevented.

The speed sensor is required for controlthe car is idling. The throttle position sensor is 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 asemiconductor resistor with 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.

Signals from this device areelectric engine management 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 computer is not correcttemperature readings, as a result of which the engine starts to overheat and lose its functionality. Therefore, it is better not to tighten the device with a replacement.

Coolant temperature sensor VAZ 2110: signs of malfunctions

In order for the sensor reading to be correct, itsit is necessary to install correctly, namely - next to 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.
• The fault code or the "engine overheating" lamp flashes.
• 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 sensor diagnostics can also talkabout its non-operating condition - corrosion and various deposits make it unusable. 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 sensorThe temperature of the coolant 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 the key (on 19), it is necessary to unscrew the sensor and remove it together with the O-ring.
6. Installation is carried out in the reverse order.

Such a device is relatively inexpensiveauto part. 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 "flounder", 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 dependsfrom 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 sensor of the coolant temperature VAZ 2110 is one of the main instruments. Its malfunction can lead not only to an 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!