- The main purpose of DTNV
- Why does the VAZ 2114 air temperature sensor break down?
- How to extend the life of the controller
- How to connect an air temperature sensor yourself
- Conclusion
There is an opinion among novice drivers that the outside air temperature sensor is not one of the key elements in the overall vehicle system. After all, this device is not included in the design of many VAZ cars. Where is the air temperature sensor VAZ 2114
This mostly applies to early models. Today, almost all modern cars are equipped with DTNV. If desired, the driver can independently connect a mechanism to control the air temperature outside the car.
Where is the outside air temperature sensor of the VAZ-2114 located and how to connect the sensor if the need arises?
The main purpose of DTNV
Today, the VDO panel has become widespread, which allows you to display the ambient temperature directly on the dashboard display. At first glance, it may seem that information about the state of affairs outside the car is not so significant for the driver. But, in fact, the outside air temperature sensor is a useful mechanism. This information is especially relevant during periods of unstable weather.
You can leave the garage in the morning, when the temperature is above zero, and in the evening it will be frosty. Thanks to DTNV, the driver will always be aware of possible problems with the road.
Among other things, in more expensive trim levels the outside air temperature sensor allows the car owner to start the engine to warm up automatically. This function significantly saves time and promotes “easy” engine starting.
According to the principle of operation, this mechanism is a conventional thermistor, since its resistance depends on temperature. The VAZ-2114 air temperature sensor is connected in its operation to the control unit. Any deviations in the functioning of the device will result in the manifestation of various symptoms of serious damage.
Methods for checking the regulator for operability
Before checking the meter, you should first check the serviceability of the fuses, the integrity of the wiring and measure the incoming voltage, which should be 5V. If there are no wiring faults and the voltage is normal, then the meter is checked for resistance. To check it, you need to remove it (the author of the video is Car Design and Repair).
To check, you will need an electric kettle, a thermometer to measure the outside temperature, and a multimeter set to resistance measurement mode.
It is advisable to take an electronic thermometer not to measure the outside air temperature.
There are two ways to check:
- In the first case, the coolant temperature sensor with a thermometer is placed in an electric kettle. In this case, the device must be connected to the tester. The electric kettle should be plugged in and monitor the readings. As the temperature increases, the resistance should increase. When it becomes +15 degrees, the resistance should be 4450 Ohms, +40 - 1459 Ohms. At 100 degrees, the resistance reaches a minimum of 177 Ohms. If the values are different, this indicates a malfunction.
- If there is no thermometer, then the meter is checked after the water boils. When immersed in freshly boiled water, the multimeter should display a resistance of slightly more than 177 ohms. Otherwise the device is broken.
Checking with a multimeter
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.
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.
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.
Installation of external air t* sensor (ADTV)
Installing an outside air temperature sensor. The automotive world is improving and developing rapidly every year, bringing unique innovations to the characteristics of the car, providing comfort and convenience to its owner.
So the AvtoVAZ company equipped its latest models of VAZ-2110 cars with additional on-board computers - DTVV. But the next model of the VAZ-2115 car was equipped with a VDO dashboard, which already came with 2 windows, which made it possible to display the temperature regime directly on the instrument panel itself.
Today, the following options for installing DTVV on the VAZ-2110 car model are known and quite successfully used:
- • First of all, you need to figure out which air temperature sensor is the most optimal in this case. Among the popular devices is DTVV, catalog number 2115-3828210-03 (price range 200-250 rubles).
- • To make sure that it is working properly, you can use a simple technique (test): by heating or cooling the sensor itself, its resistance values will also change in accordance with the instructions supplied with it.
So, the primary question that arises when installing the sensor is:
Where should the DTVV be located?
In accordance with the instructions, the DTVV must be isolated from dampness and direct exposure to sunlight must be minimized. Also, the accuracy of the sensor readings is negatively affected by heat from the engine compartment. As an exception, it is allowed that the flow of oncoming air directly impacts the sensor itself.
Having compared all the conditions, a suitable location for the sensor is the front of the car (behind the front bumper in the center), as well as near the towing eye (in the bumper or slightly above the bumper on the left in the direction of travel).
You should know that if you install the DTVV in the rear of the car, the temperature readings will differ significantly from the actual temperature. Because the warm air coming from the engine is directed towards the rear of the engine.
The sensor is equipped with 2 contacts: one goes to ground, and the second signals temperature changes. It is advisable to make such information contact into the car interior through the corresponding hole near the fuse box.
Having carried out the above steps, you can proceed to connecting the DTVV to the VAZ-2110 trip computer.
Having selected the desired model of on-board computer, it is recommended to carefully study all the documentation related to its connection.
The manufacturer equips VAZ-2110 cars with an on-board computer of the MK-2112 brand or AMK-211001 brand.
Based on the instructions in the instructions, the second contact of the DTVV should be connected to contact C4 on the MK block. As for the wire extending from contact C4, it must be removed and reliably insulated.
If there is no DTVV or if the circuit is broken, the following symbol “- -” will appear on the on-board computer display.
When connecting the sensor to on-board computers such as State, Multitronics and Gamma, it is recommended to adhere to the attached diagram included in the kit. To eliminate errors in temperature readings, a temperature calibration function was provided, but, unfortunately, not all models of on-board computers have it.
Second option: connecting DTVV to a VDO panel with 2 displays.
Mostly luxury VAZ-2115 models have a VDO instrument panel with 2 displays. The connection process is as follows: the wire coming from the sensor must be connected to the red block X2, which is located on the instrument panel in socket No. 1.
If this socket already contains another wire, then these wires must be combined. If the display of the VDO panel shows -40, then you need to pay attention to the integrity of the circuit between the sensor and the panel (if there are any breaks).
