Heating and ventilation of the interior remain an integral part of comfortable driving. The interior temperature sensor of the VAZ 2110 is one of the consumables that requires frequent replacement, since the heating system of the VAZ 2110 has a mileage of 20,000 km. starts working intermittently. How to check the part, repair and replace the controller.
Functions and tasks
Today, several modifications of interior temperature sensors are offered for VAZ cars. Therefore, you need to choose wisely, in accordance with what functioned for the benefit of your car previously.
The best option is to remove the old sensor and take it to an auto parts store. This way you will be able to find an analogue and not doubt the correctness of your choice.
Depending on the city and store, the price of a new sensor may vary. But on average the device costs 500 rubles.
How to check the serviceability of the SAUO controller
If you want to find out why the VAZ 2110 stove does not work , special attention should be paid to the ACS (automatic heater control system). This is where a multimeter comes in handy. Measure the voltage at the same time on the pink wire along with the brown contact, while at the same time turning on the ignition and turning the temperature knob. Also, do not forget about the controller model, since the voltage is reduced differently on different boards.
On controllers 1303.3854 (before the vehicle was produced in 2001), the voltage decreases after 13 seconds at the MIN mark, and at MAX it is constantly supplied and does not drop. At the slightest change in voltage, you can safely conclude that the controller is broken. On newer car models (2003 and higher), a more advanced block 1323.3854 is installed, and there is also a stove 2111-8101012. Although this solved some problems, these modules are not of high quality. The cause of failure of the 2110 is often the self-propelled gun system, so in case of the slightest problems it is worth paying attention to it.
Dismantling
Removal principle
To install a new interior temperature element, you will first have to remove the old one. It can be removed quite simply:
- Four clamps, presented in the form of springs, are used as clamps;
- Be sure to park the car on a level surface and turn on the handbrake;
- For your own safety and comfort, do not forget to remove the negative cable from the battery;
- Using a slotted screwdriver, move the box slightly from its seat;
- Dismantling begins from the top of the sensor, which makes work more convenient;
- After removing the device from its fasteners, do not jerk it sharply. The fact is that it is connected to two wire blocks. They are the ones that connect the sensor to the car’s electronic system. Carefully disconnect the wires, after which the dismantling can be considered complete.
Checking the dampers of the VAZ 2110 heater system
If the controller starts acting up, the dampers themselves may be faulty. It is better to carry out proper inspection in a timely manner to avoid damage. The stove itself has 2 dampers. The upper part is responsible for bringing cool air into the cabin directly from the street, while the lower part heats the flow directly from the heater. If one of the dampers or actuator breaks down, you will experience constant discomfort due to poor heating or excessive heat input.
The breakdowns themselves can be divided into several types. For example, often the damper simply “jams” or “jams.” The damper actuator, also known as a micro-gear motor, may be damaged. Some valves may jam due to rust formed on them. Most often this happens on new samples, since the material of the dampers is metal, while the old ones are plastic with special foam.
We recommend reading! What to do when you hear a knocking sound when turning the steering wheel in place.
If you do not hear the characteristic movement of the damper, remove the deflector in the main panel and simply move the damper by hand. If there is no movement, check the micro-gearbox, it is the drive mechanism of the damper. If the windshield is blown with warm air, and a hot stream enters the legs, it means that the damper itself has poorly blocked the air, which is constantly coming from outside the cabin.
Installation
The procedure for installing the interior temperature sensor in a VAZ 2110 car is practically no different from dismantling it. Therefore, the operation is performed in reverse order:
- Armed with a new device, connect the wire blocks to it in the same way as they were installed on the old device;
- Using a little pressure, insert it into its seat. There is no need to unscrew or screw anything additional;
- Put the negative terminal back on the battery;
- Remove the car from the handbrake;
- Be sure to test your device after installing it. You need to make sure that the cabin sensor really works.
How to replace
For VAZ 2110, the element is mounted to the ceiling trim using four latches. Dismantling process step by step.
- Unclip the outer cover.
- Remove the wire block, disconnect the connector and check the integrity of the cables.
- Check the cleanliness of the board, remove dirt with a soft brush.
If the sensor is buzzing, it is not practical to repair the equipment; the controller is replaced with a new one. If after a visual inspection no breakdown is found, all contacts are clean, the wiring is normal, check the sensor with a multimeter. The tester is switched to resistance measurement mode and the signal from pins 1 and 2 is monitored.
Zero resistance indicates that the element is not working. If the device shows a resistance of 0.2 Ohm, the sensor must be placed in the freezer for 5 minutes. Repeated measurement of the resistance on the working sensor will be in the range of 2–3 ohms, that is, it will increase at least 10 times.
Replacement of consumables is carried out independently and requires 5 minutes. The only tool you need is a flat blade screwdriver. The cost of the controller is quite budgetary, from 300 rubles. The service life is from 1 year, so the element is not repaired.
Do-it-yourself replacement – there’s nothing better
VAZ 2110 interior temperature sensor
If the driver decides to entrust the work of replacing this sensor to a professional, he needs to have a certain amount of money in his pocket and, upon the first request of the service station workers, pay for the work done. After the replacement work and payment for the service are completed, the car can be used again. To carry out independent repairs, you need to perform several simple operations.
Dismantling the sensor
First of all, you need to know the location of the sensor in the car. It is located in an accessible location. It is necessary to pay attention to the lampshade in the car interior. Next to it there is a cabin air temperature sensor on the VAZ 2110. To disconnect this sensor, it is enough to dismantle it. It is attached to the car with four clamps that look like a spring:
- The first step is to prepare the car for repair. To do this, just use the wheel mounts and put the system on the handbrake.
- To make the work easier, it doesn’t hurt to remove the negative terminal from the battery.
- Using a slotted screwdriver, you need to slightly move the interior temperature sensor on the VAZ 2110 from its location.
Note: to make this step easier, you need to start removing from the top of the device.
- After removing the sensor, you need to disconnect the two wire blocks that connect it to the vehicle's electrical system.
Installing the sensor
- To install the sensor, it is necessary to install the wire blocks in the previous position.
- After installing the wires, the sensor is placed in its original place with light pressure.
- A terminal is placed on the battery.
- The car is removed from the handbrake, the chocks are removed from under the wheels.
Note. At the end of the VAZ 2110, it is mandatory to check the interior temperature sensor.
Why the stove does not work in a VAZ 2110 family car
The heating system of the VAZ 2110 has several varieties. The older version was produced until 2001 and had on board the then current controller 1303.3854, which was later replaced by the newer 1323.3854. The changes also affected the material of the dampers, which rather made life more difficult for drivers than brought anything useful.
Despite all the inconveniences, this version of the VAZ is very popular among a large number of drivers due to the low cost of parts and its adaptability to domestic roads. You can either repair the heating system yourself or take it to a service center, where it will be quickly repaired by professionals.
If your VAZ 2110 stove does not work, then this may be due to several factors:
- perhaps you have an antifreeze leak;
- the ACS controller is faulty;
- the temperature sensor is broken;
- the dampers refused to work;
- The temperature has ceased to be regulated.
Heating is one of the most problematic components of this car. It constantly goes into a state of malfunction and creates problems for both the driver and passengers in the cabin. In this article you will learn why the stove stopped working and how to quickly determine it.
Functions and main malfunctions of the interior temperature sensor
The heating system in cars of this brand is controlled by a signal method. The impulses come from the electrical control unit. Temperature is a factor affecting every system controlled by the unit. The essence of its work is to compare the indicators on the sensor (16-30°C) with the real heat intensity, which is measured by it.
When a temperature difference is detected, the motor turns on. Its function is to change the flow of warm air using dampers and fan speed. The cabin air temperature sensor is a thermistor or semiconductor resistor, which has a close relationship between thermal state and resistance. From the control electrical unit, voltage is supplied to this device through a resistor located inside.
One of the most traditional defects of this device, which operates on the basis of a semiconductor thermistor, is the discrepancy between the temperature of the external part and the resistance. To correct this discrepancy, you need to know the main features of its work. Typically, this defect manifests itself in a rapid increase in resistivity with small fluctuations in the degree of heating of the outer part.
In addition, there may be a break in the electrical circuit of the sensitive element of the converter itself, which is why you will have to buy a new interior temperature . Periodically, a situation arises in which the thermal state of the device shell varies over a certain small range, and the resistance increases disproportionately with voltage. As a result, the heat calculated by the block turns out to be less than in reality.
Checking settings
Before replacing, you need to check the settings in the interior heating and ventilation system. In 20% of cases, incorrect set parameters are the reason that the air conditioner in the car does not work well in the summer, and the stove does not work well in the winter.
To do this, you need to close the doors and windows in the car and set a certain temperature in the cabin, for example 25 degrees. Place a thermometer near the sensor. After 15 minutes, check the thermometer reading. If the difference is more than 1 degree, adjust the sensor through the adjustment screw on the device. Scrolling clockwise will increase the range, counterclockwise will decrease the maximum temperature threshold.
Climate control operating modes
Before using the unit, you must calibrate the climate control by pressing the A/C button and, without releasing it, turn on the ignition. As soon as three horizontally oriented bars appear on the display, the button can be released. Calibration will be performed automatically, and its duration is about 5 – 10 seconds. If, during operation of the climate control, it is discovered that the position of the air damper does not correlate well with the entered value, it is necessary to recalibrate using the same algorithm. As already noted, climate control operates in three modes: automatic, manual and “Semi-automatic” mode.
When manual mode is selected (which will be indicated by a non-lit LED located above the AUTO button), the damper is controlled manually using the corresponding regulator. On the display, the left scale in the form of stripes is responsible for displaying the position of the damper. The rotation speed of the furnace fan is controlled by pressing the regulator handle and then rotating in the desired direction (clockwise - increase the speed, counterclockwise - decrease). After a five-second time interval has passed, the fan speed control mode is switched off, and the regulator returns to the damper climate system control mode.
To switch the QC operation to automatic mode, just press the AUTO button. At the same time, the corresponding LED lights up, and with the adjustment handle you can set the temperature required for a comfortable stay in the car. In the future, the VAZ-2110 climate control unit will independently control the operation of the air conditioner and heater to ensure the required temperature conditions. Semi-automatic mode is activated as soon as the user tries to change the fan speed using the appropriate control. In this case, the climate control damper will still be controlled automatically, unlike the furnace fan mode. To switch to automatic operating mode, press the AUTO button twice quickly.
The rightmost key with the inscription INJ is responsible for turning on the mode of monitoring and indicating the voltage of the vehicle's electrical network, the operating temperature of the power unit and displaying ECM error codes (if there are problems with the engine). The display of each of the listed parameters is selected by successively pressing the key. For the button to work, it is necessary to connect the VAZ-2110 diagnostic circuit to the climate control control unit.
The second button from the right is responsible for turning on the display on the air temperature measured by the internal sensor. The key located in the middle turns on the mode for displaying the air temperature outside the car. Both of these keys require the installation of appropriate sensors and their connection to the control unit. The leftmost A/C button is the air conditioning on/off switch (if equipped in the car). Maintaining the set temperature when the air conditioner is turned on is carried out in the same way - by controlling the damper that regulates the supply of warm and cooled air.
Why does the stove fan run at the same speed?
If you want to check the stove for functionality, you should not immediately start disassembling it. If the VAZ 2110 heater motor only works in the third or first two modes, then most likely the problem lies in the resistor. If the first two modes work through it, the third operates directly. If your resistor has burned out, there is no need to completely repair the heater . You can simply replace the faulty component. This will significantly save not only your money, but also time, since disassembly is not a simple process.
