How to check temperature sensor: description, step by step instructions and recommendations

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2018-04-02 09:19:14

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Every car owner knows that systems controlled by special sensors. They are located in different places on the mechanisms. If such items fail, increasing the likelihood of failures of system elements. In this case, the repair will be costly. To eliminate the possibility of occurrence of such trouble, conduct periodic inspections of system sensors.

Controlling the device are responsible for the operation of many components and mechanisms. They need to be able to properly control. How to check the sensor of temperature, pressure, air and other varieties, will be discussed in the article.

Sensors

Before you learn the technique of how to test the idle sensor, oil pressure, temperature, and other varieties of control devices, it is necessary to consider features of their work.How to check the sensor

The Basic devices of the type represented by the monitored operation of the engine and related systems. It is the engine needs to have precise control of its elements and systems. His failure entails the need for a major overhaul. To avoid large financial costs, it is recommended to check the performance of sensors.

The Control device is responsible for testing the heat level of the system coolant. They provide a measurement of the status of the different nodes in the process of idling in the normal mode, etc. How to check temperature sensor, air, oil pressure and other such devices, you should know each owner of the car.

Temperature Sensor

There are a number of recommendations on how to check the sensors on the Vase, "Chevrolet", «Mercedes» and other brands of cars. One of the main detectors is a device that measures the heating of the coolant. Data collected on the condition of the antifreeze, this device transmits to the control unit of the motor. He, in turn, based on the data produces the adjustment of their work. In this case, setting the correct level of fuel and ignition angle.How to check temperature sensor

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On many cars (including vases, «Kalina», «prior”, “giant”, etc.) the sensor temperature control switches the system on electrofiltration type of cooling. His testimony is often displayed on a dashboard. This allows the driver to monitor the status of the engine and its coolant. In modern vehicles sensors are installed for monitoring of temperature, which have a negative coefficient of heating. This means that when the increase in heat decreases the resistance of this element.

Working Principle of temperature sensor

Considering how to check the sensors the engine work, you need to study the basic principle of their functioning. One of the most important in the system is the temperature control device antifreeze. The control unit sends to the sensor electrical signal. It has a voltage of 9 V. When this happens, a reader takes measurements of the resistance at the contacts of the sensor. These data the system sends back to the control unit. However, she will be able to calculate for a given logarithm, as they should in these circumstances to operate the motor.

how to check pressure sensor

If the temperature is increased, the resistance should decrease. In this case, the system through its special mechanisms and electronic devices carries out the level adjustment of fuel consumed during operation of the motor. This allows the right time to reduce the heating temperature. The antifreeze in this case will be able to properly cool the system. If a strong lowering of the temperature the mechanism will help to adjust the operation of the engine in the opposite direction.

How to dismantle the sensor?

Considering how to test the coolant sensor, you need to know how to dismantle this element of the system. Drivers often confuse this element with the device, controlling activation of the fan. It does not need to look on the back of the fan. The temperature sensor is almost always set to one of two possible plots. In the first case, the control device heating the antifreeze may be installed near the thermostat. Moreover, it can be directly to his body. In the second case, the sensor is mounted in the head of the cylinder block. It needs to be in the vicinity of one of the pipes of the cooling system.

how to check the sensors VAZ

To dismantle, you will need to drain the antifreeze from the radiator. Next, remove the air filter if the vehicle refers to the injection type. Remove the sensor using a wrench. The dismantling of the cars can be more complicated. Often the sensor is in the rear of the cylinder head. In this case, when the dismantling will have to disconnect several hoses.

Test function

The Methodology of how to test the temperature sensor, is described in detail by the manufacturer of the vehicle. For carrying out such work will need tools, tester, water tank, heater, thermometer with divisions to 120 ºC and basin for antifreeze. First you need to disconnect the radiator to drain outit antifreeze. After that, the sensor is dismantled. A container of water you need to put on a gas or electric stove. In the liquid necessary to lower the sensor. His brass part needs to be completely immersed in water. Plastic must be on top.

how to check the idle sensor

To the ports on the device you want to connect your tester. It include the mode of measurement of resistance. Next you need to heat the water and record the readings on the multimeter. You need to study the manufacturer's manual, which shows the operating parameters of the sensor. Most often at a temperature of 100 ºresistance is 150-200 Ohms. When the temperature drops to 20 ºWith this figure expected to grow to 3-4 ohms. This suggests that the sensor is OK. Otherwise you need to replace it.

Idle Sensor

Drivers may wonder how to check the idle sensor the car. This device is also responsible for ensuring the stable operation of the engine. It only controls this process at idle. This sensor controls the amount of air that is supplied to the motor in this mode.

In this case, measurement is made not just anti-freeze fluid. The air supply system at idle has certain constituent elements. It has a valve in the form of a conical needle. This element prevents the flow of inside air system. Driven by a needle through a small motor which is powered by electricity. The damper is actuated when switching on the motor. The needle can open or close the gaps through which air enters the engine. The diameter of this hole is also adjustable due to the special configuration of the valve.

Symptoms

Before you learn how to check the air gauge, you should consider the circumstances in which you need to suspect the failure of this element of the system. If the control device breaks down, the car will stall at stops at traffic lights. In this case, the driver will have to hold while waiting for the green light the gas pedal.

how to check the idle sensor

A faulty idle sensor also indicate unstable turns of the engine. It is audible even without the use of special equipment. Also the engine takes long to warm up. Even in warm weather, the start of the vehicle becomes problematic. Even after warming up for a long time have to go “broke”. Also, the driver may notice that when you want to transfer transmission lever on neutral position, the motor starts to become unstable. He may even die. In this case, you need to check is the idle sensor.

Check idle sensor

If there are failures listed, you need to consider how to check the idle sensor. It is on the throttle. Next to him, fastened her rope. Over the idle sensor is a device control throttle position. Turn ignition off and disassemble the represented device. The sensor can be attached with adhesive or bolts. In the first case you have to disassemble the whole throttle unit. Bolted connection will allow you to unplug just the sensor.how to check the coolant sensor

Next to the sensor you need to connect the wires on the electrical system. Tapered needle should put your finger. Next, turn on the ignition. If you then felt slight tremors needle, then the sensor is OK. Otherwise, this subassembly is stationary. The sensor will need to be replaced.

Check oil pressure switch

Malfunction of oil pressure switch may cause malfunction of the motor. So it must be periodically tested for proper operation. How to check the oil pressure sensor? For this there is a certain technology. It involves disassembly of the test device. Next you need to connect the contacts of the multimeter to the sensor. It shows zero resistance. Then with a pump you gotta tap the oil. The chain has to break. The device, in this case representing infinity. This shows the complete sensor error. Knowing how to check the sensors, you can ensure the normal operation of the engine and all systems for a long time.


Article in other languages:

AR: https://www.tostpost.com/ar/cars/12419-how-to-check-temperature-sensor-description-step-by-step-instructions-.html

BE: https://www.tostpost.com/be/a-tamab-l/22252-yak-praveryc-datchyk-temperatury-ap-sanne-pakrokavaya-nstrukcyya-rekam.html

DE: https://www.tostpost.com/de/autos/22257-als-temperaturf-hler-berpr-fen-beschreibung-schrittweise-anleitungen-u.html

ES: https://www.tostpost.com/es/coches/22276-c-mo-probar-el-sensor-de-la-temperatura-descripci-n-paso-a-paso-las-in.html

HI: https://www.tostpost.com/hi/cars/12432-how-to-check-temperature-sensor-description-step-by-step-instructions-.html

JA: https://www.tostpost.com/ja/cars/12434-how-to-check-temperature-sensor-description-step-by-step-instructions-.html

KK: https://www.tostpost.com/kk/avtomobil-der/22243-alay-tekseruge-temperatura-datchig-sipattamasy-adamdy-n-s-auly-zh-ne-s.html

PL: https://www.tostpost.com/pl/samochody/22198-jak-sprawdzi-czujnik-temperatury-opis-krok-po-kroku-instrukcje-i-zalec.html

PT: https://www.tostpost.com/pt/carros/22200-como-testar-sensor-de-temperatura-descri-o-passo-a-passo-e-recomenda-e.html

TR: https://www.tostpost.com/tr/arabalar/22252-nas-l-kontrol-s-cakl-k-sens-r-a-klama-ad-m-ad-m-talimatlar-ve-neriler.html

UK: https://www.tostpost.com/uk/avtomob-l/22234-yak-perev-riti-datchik-temperaturi-opis-pokrokova-nstrukc-ya-ta-rekome.html

ZH: https://www.tostpost.com/zh/cars/13177-how-to-check-temperature-sensor-description-step-by-step-instructions-.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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