Where is DTOZH located?
If the engine or coolant temperature sensor is working, if necessary, the driver will receive a signal to turn off the engine in time. If the motor can actually overheat, this will prevent possible consequences caused by boiling liquid in the system.
Depending on the specific machine, the temperature sensor can be installed:
- on the cylinder head;
- in the upper pipe of the radiator device;
- in the radiator housing itself.
Installation location of the controller on the Lada
It should be noted that this controller not only allows you to prevent overheating of the power unit, in the winter season it will also inform the driver about how warm the engine is. Of course, you should not start driving with a too cold engine, as this will significantly affect the wear of the elements of the power unit, and will also lead to an increase in fuel consumption. This greatly affects gas mileage.
How to check
The wiring can be checked using a multimeter; to do this, you need to get close to the sensor from the bottom of the bumper and disconnect it from the grooves. After this, we inspect the chip and look for the latches; they need to be bent so that the device can freely come out of the chip. We inspect the wires that are attached to the chip and call it with a multimeter, searching for a group that does not transmit contact.
If the contact group is working, then it is necessary to check whether the mass is supplied to the device. According to the VAZ-2114 diagram, the mass of the sensor is located where the headlight unit is, highlighted with a red line in the diagram.
Establish contact if necessary. Also, the sensor can be connected simultaneously to the on-board computer and the car’s dashboard and, because of this, display incorrect data. In this case, you need to leave the connection only with the dashboard.
During the winter season, the sensor may simply freeze and because of this display incorrect readings. In this case, it is necessary to check its condition; if it is covered with ice, then warm it and treat it with an alcohol solution. After it has been processed, it is worth drying the contacts and connecting the device to the car.
It happens that the degrees are displayed correctly only when the car is stationary, but as soon as it accelerates, it immediately displays that it is minus 40 outside the window. You will have to inspect the fuse box, sometimes condensation gets into it and because of this it starts to work incorrectly.
Types of DTOZH
We figured out where the controller is located and what functions it performs, now let’s talk about the varieties. Regardless of location, regulators are divided into magnetic and bimetallic. You can understand what type of installed element is based on how the device reacts to starting the motor. Magnetic devices react almost immediately and display the temperature profile immediately after the engine starts. As for the bimetallic one, it will be able to show accurate readings after a certain pause.
What is the operating principle of the devices:
- The bimetallic regulator is equipped with a control unit that changes the current strength based on the temperature of the consumable. Ultimately, this leads to heating of the coil on the steel strip, while the latter can change length depending on the temperature regime.
- In magnetic controllers, the operating principle is also not complicated. The design of such a device consists of an arrow mounted on it, and on the side parts there are coils that are connected to the car's electrical circuit. The resistance level of the coils will change in accordance with the passing current layer, which, in turn, is determined in accordance with the temperature conditions in which the motor operates.
DTOZH controller with dial
How to extend the life of the controller
The cost of this device is relatively small. If the sensor fails, it is better to replace it with a new one. Experienced mechanics advise doing this. You can try to extend its service life, but there is no guarantee that the DTNV will not fail at the most inopportune moment.
In any case, before replacing the controller, it is best to ensure the following:
- If the contacts are oxidized, they should be cleaned.
- Oxidized contacts on the chip should be wiped with alcohol and dried.
- Check wiring.
If the actions taken do not lead to the desired result, it is best to replace the DTNV. To carry out all the work, you do not need to have the skills of a mechanic; it is enough to arm yourself with a handy item.
When replacing an old sensor with a new one, there should not be any particular difficulties. DTNV must be installed in the same place. If the car was not equipped with such a device, then first of all it is worth deciding on a suitable location for the mechanism.
It is strictly not recommended to install the controller in the rear of the car. Since hot air is directed precisely to this part of the body while the car is moving. Experienced auto mechanics install the sensor mainly in the front of the car. Where is the air temperature sensor located on the VAZ-2114? The manufacturer has already provided space between the front bumper and the radiator.
Causes and symptoms of DTOZh malfunction
If the controller fails, the cooling fan will not be able to start. Ultimately, this can lead to overheating of the power unit. At the same time, the driver who is currently driving may not even be able to find out about the presence of a problem, which will result in expensive repairs of the internal combustion engine.
The problem can be solved only by periodically checking the temperature sensor, which can be done at home using a tester - a multimeter - as well as a digital thermometer. The dismantled regulator must be lowered into a container of water heated to 100 degrees, after which the resistance must be measured, this parameter should be 177 Ohms. When the liquid cools to 50 degrees, this figure will already be 973 Ohms or higher, and when cooled to 20 degrees it will increase to 3520 Ohms. If the indications are different, this indicates the need to replace the DTOZH.
How to connect an air temperature sensor yourself
The mechanism itself has two contacts, one of which must be connected to the vehicle ground, and the second to the ECU. But, before starting all work, you need to make sure that the on-board computer supports collaboration with a specific type of sensor. Information can be found in the documentation.
As for the installation itself, there are no difficulties here. You just need to follow the instructions for connecting the DTNV. After connecting the sensor, make sure that the instrument panel display shows the correct temperature.
If the incorrect outside air temperature is still displayed, you should “restart” the on-board computer. You just need to remove the positive terminal for 5-10 minutes, and then reconnect it. After the operation has been completed, the DTNV should begin to display the actual ambient temperature.
Purpose of the incoming air temperature sensor
DTVV for BMW
The intake air temperature sensor or DTVV is another controller that is equipped in almost all cars. It may seem that the outside temperature sensor does not play a special role in the operation of the engine, but this is not so, since it is this controller that determines the smooth operation of the engine. As a rule, the outdoor air temperature sensor has a simple design based on a thermistor, as a result of which it rarely fails (video author - Vladimir Pastukh).
However, there may also be glitches in its operation. When the intake air temperature sensor operates for a long time, it may cause resistance and temperature mismatch. Ultimately, this contributes to fewer errors in the calculation of indicators.
If the external intake air temperature sensor transmits incorrect readings, the on-board computer will incorrectly calculate the volume of the combustible mixture. Temperature and air humidity parameters will help reduce the supply of air itself and increase the volume of gasoline required to form the air-fuel mixture. If the air is too humid, the controller automatically makes adjustments in accordance with the parameters contained in it.
As a result, the mixture that will enter the cylinders will be inappropriate, resulting in incomplete combustion. A malfunctioning intake air temperature sensor can cause unstable operation of the power unit. Moreover, an over-enriched mixture will cause the spark plugs to flood, and this, in turn, will make it impossible to start the engine. The inlet air temperature sensor must be installed in the intake manifold. As for the service life, it depends on the device itself and the car model.
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Purpose of the ambient temperature sensor
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It is intended primarily for drivers who travel long distances or for long periods of time:
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- truck drivers;
- couriers:
- postal services;
- passenger carriers;
- travelers, etc.
During a long trip, the outside air temperature can change significantly. If the driver or passengers intend to get out of the car, even for a short time, information about the air temperature will not be superfluous in order to dress accordingly. As an example, you can cite information on airliners like “the temperature outside is minus 45 degrees Celsius,” although no one is going to take a walk there.
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Video - installing an outside air temperature sensor on a Renault MEGAN 2:
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Information about the outside air temperature helps set the optimal operating mode for the vehicle's climate control system. If the temperature outside is, for example, minus 20 degrees Celsius, there is no need to set the temperature in the cabin to plus 25. Firstly, this will lead to increased fuel consumption. Secondly, if you leave the car while refueling too hot, there is a possibility of catching a cold.
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Finally, information about the outside temperature helps make decisions about whether or not to stop along the way. The appearance of the surrounding space is deceiving. Many drivers know that in the morning, when the sun rises, it seems that it is already warm outside. In fact, the air temperature may be low. It is enough to wait half an hour to make a comfortable stop for breakfast.
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DTNV Installation Guide
How to install or replace an outdoor temperature sensor at home?
If your machine is not equipped with this regulator, the installation procedure is as follows:
- First you need to purchase an ambient temperature sensor and select a location for its installation. It must be taken into account that the controller should not be exposed to high temperatures from the power unit. The most suitable location for installation is next to the radiator unit.
- The device needs to be fixed, after which the cable with ground needs to be routed into the car interior.
- The dashboard is being dismantled. Depending on the vehicle model, you need to find a contact for connecting the regulator; at this stage you should use the service manual.
- If errors occur in the operation of the controller, you need to disconnect the battery for some time (usually 10-15 minutes is enough), then turn it on again and check the functionality of the device.
Why does the VAZ 2114 air temperature sensor break down?
The main difficulty for novice drivers is the search for a device. The manufacturer has hidden the mechanism in such a way that sometimes experienced drivers are not immediately able to detect the DTNV. The controller itself is reliable, but breakdowns often occur.
The most common reasons for its breakdown:
- from being hit by crushed stone while driving;
- critical temperature level (often breaks down during severe frosts);
- damage to wires;
- oxidation of contacts.
The driver may not notice for a long time that the ambient temperature sensor of the VAZ-2114 has failed. The system will not generate any signals if there is a small difference between the actual air temperature and the air temperature displayed by the sensor. However, with large deviations, when in the summer the display shows sub-zero temperatures, serious troubles will arise.
The resistance in the circuit will increase, and the control unit will perceive this information as an urgent need to increase the amount of fuel supplied to the cylinders. Ultimately, your gas mileage will increase.
Ambient temperature sensor: location, device, circuit and specific features
General information
As noted above, various sensors are installed on cars for a reason. They are necessary for the efficient operation of the system as a whole.
As for the outside air temperature controller, it is mostly informational in nature and shows the temperature outside. But this does not apply to all systems.
Sometimes the coolant temperature sensor is connected to the engine electronic systems. This is necessary to start the engine in the cold season and is a very convenient addition to the “autostart” function.
Where is the ambient temperature sensor located?
On different brands of cars, the controller has a different location. This is due in most cases to the design differences of the machines. For example, on a BMW you can install a temperature sensor directly behind the bumper, but not on a VAZ.
"Lada Granta": sensor installation
This car is equipped with a controller only in the maximum configuration. In other cases, there is preparation, that is, there are all the necessary connectors and wires for connection. This is done so that the driver has the opportunity to carry out the installation himself.
Direct installation
How to install an ambient temperature sensor on a Priora
The standard configuration includes this controller. But there are times when for one reason or another it is absent. For example, you bought a used car, but there is no sensor or there is one, but it doesn’t work.
However, this is not a big problem. True, for installation or replacement you will need to remove the bumper, since it is not always possible to get under it. It is located directly behind the front bumper and mounted on the front of the body.
If there is an air conditioner, then there will be two such sensors. First of all, you need to check the functionality of the old one. The best option is to take a household thermometer and compare the readings.
Deviations may be caused by excessive voltage on the contacts.
About installing the controller on Kalina
Let's figure out how to install an ambient temperature sensor on this car. "Kalina", unfortunately, often does not even have the necessary wires, so you will have to pull them into the cabin yourself.
Finally
As you can see, there is nothing complicated about the connection. The most labor-intensive process is removing and installing the bumper. After this, you can be sure that you will not have to make any effort.
Often a sensor is provided, but does not work. The reason may be not only in the controller, but also in the wiring, as well as bad contacts.
Fortunately, all these nuances can be eliminated with the help of a multimeter and VD-40 liquid.
So we figured out where the ambient temperature sensor is, how it works and is installed. Everything is extremely simple. The main thing is to have the desire and some free time.
