Heat sensor: how to check it and symptoms of a defect

Heat sensor: how to check it and symptoms of a defect

Heat sensor: how to check it and symptoms of a defect

The temperature sensor is one of the vital sensors used by the car engine control unit, as this sensor tells the electronic control unit of the car about the engine temperature or the temperature of the cooling water in the car engine, and the sensor signals affect many vital functions in the car, It works to control the amount of fuel.

When the engine starts it is cold, and at this moment the sensor sends a signal to the control unit to adjust the amount of fuel and make the mixture rich until the fuel spell period increases, which facilitates the performance of the engine, as well as for the operation of the EGR valve, where the control unit turns off the valve when the engine is in Start of operation which is cold because running at the beginning of the operation affects the speed and efficiency of the engine, in addition to controlling the work of the cooling fans, correcting the ignition timing, as well as controlling the steam valve emitted from the fuel.

Where is the temperature sensor in the car

The location of the temperature sensor varies depending on the type and model of the car, but in most cars it is located in the right area next to the radiator, where it monitors the temperature of the coolant, which it gained by entering it inside the engine, which gives an indication of the engine temperature itself.

Method for checking the temperature sensor

The temperature sensor performance is checked by using a fault diagnostic device, and if no sensor malfunction appears in the fault list, and if it does not appear in the fault list, it is possible to confirm by using a thermometer.

Just bring the infrared thermometer and measure the temperature next to the sensor to make sure that the engine temperature is low, then start the car and make sure to read the device again while checking the temperature indicator in the car, if the meter reading ranges after three minutes of operation between 90 to 93 degrees and I saw the car temperature indicator indicate the right temperature, this means that the temperature sensor works efficiently.

It is also possible to partially submerge it in warm water, and then measure the potential difference, which is supposed to give a clear potential difference in all temperatures, so if you do not notice the difference in voltage this means that there is a defect in the temperature sensor.

How to connect a heat sensor

It is always preferable when connecting the sensor to deal with a specialist, as there are three sensors on the sensor that are a ground terminal, an electrical terminal (5 volts), a signal terminal, and in the event that any party replaces the other place, the car's electrical cycle will be damaged and possibly burned.

How do I know the temperature sensor Khirbane

When there are problems with the heat sensor, you will notice many distinct symptoms such as the consumption of large quantities of fuel, the appearance of black smoke from the exhaust due to the lack of fuel combustion properly, and the sudden rise in temperature.