I think that many drivers have seen on the side of the car, from under the hood of whose pairs - Zakipeli! Heat, automotive traffic jams, then we are going, then standing and as a result, the engine overheats. To help the driver, so that he saw the coolant heating time, the coolant temperature sensor is installed. The sensor is small, but bears an important function. And if the sensor does not cope with his duty, it can lead to big problems.

Cooling fluid temperature sensor, more about sensor

The thermal sensor should show the temperature coolant The engine is to show real numbers, the thermal sensor must have direct contact with the coolant, so it is installed directly next to the thermostat housing.

If, with visual inspection, the cooling fluid sensor has corrosion and cracks, there are traces of coolant - it means the sensor is faulty.

But, not always the sensor malfunction is reflected in its appearance.

Externally, the sensor looks properly, and the machine works badly.

For what signs of the machine work can be suspected that the sensor is defective:

-Beed caused significantly increased fuel consumption;

-The dashboard is displayed for the problem of problems;

-The idle turnover, unstable engine operation;

-Control lamp shows engine overheating.

Coolant temperature sensor, how to detect sensor malfunction

If you have a suspicion of faulty operation of the sensor, it must be checked for this.

To test the cooling fluid temperature sensor, prepare the following instruments:

-Multimeter or Ommeter;

-Termometer with a measurement scale 100 * C and above;

-The accuracy to collect a hot liquid, with a capacity of at least 1 liter.

We are faced with the task of measuring the thermal sensor resistance at different temperatures.

We pour into heat-resistant water capacity with a volume of 500 ml, heating it and lower the sensor into the container, we remove the heating.

Water cools, every 20 * from the drop in temperature, we make measurement measurement.

If the sensor works properly, the data obtained must comply with regulatory values. Voltage and resistance are the main indicators by which you can check the sensor service.

If the sensor is faulty, it will transmit incorrect data to the electronic control unit, respectively, the ignition and engine will work incorrectly.

The sensor must pass on the control unit on the internal temperature of the engine: it is cold, it warms it, its operating temperature.

The higher the engine temperature, the less the electrical resistance of the thermal sensor and vice versa.

But, before checking the work state of the thermal sensor - check the filling of the cooling system: the coolant should be in the radiator, the cooling system.

It is necessary to check the correspondence of the coolant composition and its shelf life.

Water and antifreeze must be in a state 50x50.

Pay attention to the fan operation, its malfunction can affect engine overheating.

Coolant temperature sensor, how to replace it

If the coolant temperature sensor is defective, the work on its replace will occur as follows:

- It is necessary to drain the cooling fluid to the level below the thermal sensor;

- It is necessary to remove the air filter in order to exclude interference in work;

- Remove in what position is the marking of the sensor, and then remove the rubber cover from the sensor;

- Using the key to 21 (candle wrench), unscrew the coolant temperature sensor;

- on the released place set a new sensor, the sensor must be installed in the same position as the previous one, for this you should have remembered the location of the sensor marking position;

-tore the rubber case in place;

-The fix air filter;

- Pour cooling fluid to the desired volume;

- Check the cooling system for air. If the air is present, it must be "crap". The presence of air in the cooling system will lead to engine overheating.

And so, you replaced the temperature sensor, now the engine will work smoothly and reliably.