Heater regulator VAZ 2110 pinout

Design of the heating system VAZ-2110

It includes three main nodes. This is a control unit for the VAZ-2110 stove, an air duct system, and a heating unit. The stove is controlled via an electronic unit. It consists of knobs with which the driver sets the required temperature and fan intensity.

The unit also includes a temperature sensor. As for the latter, it is necessary to automatically start the stove when the temperature inside the car drops more than two degrees below the set one. The sensor is equipped with a small fan. If you move the knob on the controller to position A, then a small electric motor is started in the heating unit, which controls the damper. The temperature sensor itself in the VAZ-2110 can be found on the ceiling, near the lighting lamp.

Another important component of the heating system is the air ducts. They pass directly from the stove itself, and each channel has its own separate function. Thus, the central channels are designed for interior ventilation.

The air distributor is responsible for supplying cool air to the cabin for ventilation or warm air for heating. The other two air ducts are designed to heat the interior in the back row. The rest are also intended for ventilation. Two side channels heat the mirrors and part of the interior. Separate nozzles are used to heat the driver's feet.

Design and diagram of the heater (stove) VAZ-2110, 2111 and 2112

Winter is coming, and no matter how popular the saying is ready to sleigh in the summer, we begin to put the heater in order only closer to winter. This small cutout from the Murzilka will help us with this, which will tell us how the stove in the tenth VAZ family works. We present to your attention a diagram of the heater air ducts and control parts for the VAZ-2110 heater

1 – rear heating air ducts 2 – floor tunnel lining 3 – foot heating ducts 4 – central cabin ventilation nozzles 5 – side cabin ventilation nozzles 6 – front door window heating nozzles

7 – control lever for the interior heating system 8 – air distributor housing 9 – foot heating flap 10 – windshield heating flap 11 – heater

And here is a diagram of the parts of the VAZ-2110 stove, the design of dampers, valves, etc.:

1 – electro-pneumatic valve 2 – front heater air intake housing 3 – air intake water deflector flap 4 – recirculation damper control valve 5 – air intake recirculation damper 6 – rear heater air intake housing 7 – heater duct damper 8 – heater control damper 9 – radiator 10 – heater radiator casing

11 – steam exhaust hose fitting 12 – supply hose fitting 13 – exhaust hose fitting 14 – heater electric motor with fan 15 – electric motor housing 16 – support platform for the heater control damper drive lever 17 – heater control damper drive lever 18 – damper drive micromotor 19 – resistor 20 – heater casing cover

Note that the VAZ-2110 heater has an air recirculation system, that is, the air is not taken from the street, but simply circulates inside the cabin. The advantages of recycling are that dust, odors from the street, etc. do not enter the cabin. Cons: the windows fog up, the air in the cabin is not updated. When the recirculation system is turned on, the air flow during movement does not flow by gravity into the cabin, so the heater motor must be turned on. The electric motor in the tenth stove is essentially not repairable; it is recommended to change it in case of any malfunctions. The heater is controlled by an electronic control unit. There is no faucet that shuts off the flow of coolant into the heater radiator in the VAZ-2110 and is not provided for by the design. That is, the radiator is always on.

Block responsible for temperature

The central unit in the stove system is the heating unit. Its main function is to directly heat the interior. This block is arranged as follows. An electric motor with fan blades pumps hot air, three dampers perform the function of recirculation and closing/opening the channels. There is also a heater core. On modern new generation systems, heat exchangers are not equipped with a tap.

Therefore, the radiator is always heated, regardless of the time of year. The manufacturer claims that this has solved the problem with constant faucet leaks. In addition, heating of the interior is significantly faster. In summer, supply ventilation occurs outside the radiator.

Modernization of the damper on the VAZ-2110

Malfunctions with the damper often result in the interior heating very poorly and slowly. The VAZ-2110 stove control unit is to blame. The controller is experiencing problems. The device does not send a command to extend the flap. In this case, it is recommended to check the temperature sensor. The controller handle is set to its extreme position and then twisted several times from the left to the right position. The temperature of the air flows must be checked by hand. In this way, the operating condition of the sensor is checked in one of the extreme positions of the handle. If the air flow changes the temperature when the knob is in the extreme position, then the sensor must be replaced. If the heating does not change, the cause is looked for in other places.

VAZ 2110 stove diagram and functional features

VAZ 2110 heater diagram

As you know, the main functional purpose of a car heater is to supply warm or cold air inside the cabin. In order to have a practical opportunity not only to identify a malfunction, but also to eliminate it, you need to know how the VAZ 2110 stove circuit is designed. After all, there are different types of possible malfunctions and there can be both problems in the electrical circuit and in one of the elements of the stove itself. For a VAZ 2110, the heater diagram and knowledge of it will make it easier for the motorist to find a break and repair the heater.

Fan problems

This will be indicated by noise or strong squealing while the car is moving. First you need to find out what is causing the fan failure. In some cases, the lower part on the heater housing falls off. Then the hooks are installed in place, which serve as fastenings.

However, it is more common to see broken tabs on the heater unit housing. Here the housing needs to be replaced. Another reason is uneven shaft expansion coefficients if the fan is heavily worn. In this case, experts recommend replacing the stove motor or its bushing. Sometimes the fan makes noise because of the washers, which are used to eliminate axial play. The element needs to be removed and cleaned. Replace the washer with a fluoroplastic one, then lubricate everything well.

If the stove does not work at first speed

Each fan speed (except the last) is connected through a separate heater resistor.

It is located not on the controller, but under the frill. One of the reasons for the inability to work at first speed is a faulty resistor. If the second speed does not work, then the reason is the same. But malfunctions can also be due to defects in the contacts on the board. Often, due to high temperatures, the board becomes very hot. As a result, contacts come loose. The entire board must be checked thoroughly. They look more carefully where food is served.

Replacing self-propelled guns

Control units cannot be repaired - they are simply replaced with new ones. But first you need to make sure that this mechanism is the reason. Instead of a broken one, install a working control unit. Its price is about 1500 rubles. The element is very easy to dismantle: just remove the buttons installed nearby. And then you can remove the device. The handles are set to zero positions and then removed.

Then the glass and front cover snap off. Before removing the heater control unit on a VAZ-2110, unscrew two screws in the front and one in the back. The board can then be pulled out of the case and carefully inspected to ensure its integrity. If there is damage to the board tracks, they must be repaired. Subsequent assembly is performed in reverse order. If the temperature on the control unit is not regulated, then the entire board should be inspected. There will definitely be defects. But before you pull out the heater control unit on the VAZ-2110, you need to check the fuse box. Perhaps there is a bad connection there.

VAZ 2110 stove, heater, fan, dampers, video of replacing the VAZ 2110 stove radiator

The VAZ 2110 stove is perhaps the most problematic and capricious mechanism in the entire car design. You cannot do without a stove or a faulty interior heater radiator on a VAZ 2110, given our cold climate. If in the summer a non-working stove may not bother you, then with the onset of the cold season it often turns out that the stove on the VAZ-2110 is blowing cold air. Today we will try to talk in great detail about the design, repair and replacement of the heater on the “ten”. For clarity, we will supplement the text with photographs and videos.

Let’s say right away that the design of the heating system on the “ten” is fundamentally different from what was on the old VAZ models. The most important feature and difference of the interior heater is that the VAZ 2110 heater radiator and its fan are located not in the cabin, but in the engine compartment. This design has its advantages, for example, to replace the heater radiator or stove fan, you do not need to completely disassemble the front panel (dashboard).

Another important difference is the electronic control of climate processes in the cabin. For this purpose, the VAZ 2110 is equipped with a so-called automatic heater control system (AHC). Photo of the SAUO block below.

By the way, the SAUO unit on “tens” of different years of production varies. Since 1996, 4 types of SAUO controller have been produced. It is worth taking this into account when purchasing a unit as a spare part. It is this device that controls the temperature in the cabin and the operation of the fan. You can set the temperature from 16 to 28 degrees.

But how does this miracle device work? On the ceiling of the “tens” cabin there is a temperature sensor or a ceiling air sensor with a built-in (very small) fan for air circulation. It is this sensor that sends information about the actual temperature in the cabin, and the SAUO unit gives a command to the micro gearmotor (MMR), which in turn opens or closes the main damper, which is responsible for the access of hot air to the cabin. When the temperature in the cabin changes, the ceiling sensor gives a new signal, the micro-gear motor is activated, turning the damper, closing or opening the access of hot air to the cabin. This way the set temperature is automatically maintained. Next is a photo of the VAZ 2110 heater air duct diagram .

Setting the air temperature from the heater

You can set the desired temperature in the cabin using the adjustment knob. But for a more accurate result and adjustment, the block has a special screw. To check the accuracy of temperature control, close all doors and windows. Place a control thermometer in the sensor area.

Then the element is set to automatic mode, and heating is monitored using a thermometer. How long can the control unit of the SAUO VAZ-21102 stove be adjusted in time? The procedure takes no more than half an hour. If after 15 minutes the actual temperature does not correspond to the set one, then the block is removed. Turn the adjusting screw clockwise. If you rotate the screw clockwise, the temperature will increase, if counterclockwise, it will decrease. Then install the element in place and check that it is working correctly. As for the possibility of repairing faults, the control unit for the VAZ-2110 stove of the new model cannot be repaired (however, like the old one). In case of serious malfunctions, it is replaced entirely. Moreover, the cost is low.

So, we found out why the stove does not work and how to solve this problem.

Source

Heating device design

The heating of the VAZ-2110, through which a motorist can feel comfortable in his movable property at any time of the year, consists of several separate devices working in close conjunction. The central device of the unit is the radiator, with the help of which the air flows going into the cabin are heated. In order to be able to repair or replace the radiator, you will have to look for ways to it under the hood.

The second most important device is the air distributor, which has several pipes running throughout the cabin of the “tens”. Compared to the old-style models that preceded the release of the VAZ-2110, the new car has an evaporator, which has found a place in the air conditioning system.

The operation of the stove is controlled through a special control unit. In the VAZ-2110 operating manual, this device has a different name (controller). The unit operates together with a temperature sensor located in the cabin. The sensor transmits information regarding temperature to the unit, after which the data is compared (the information displayed on the handle is taken into account). As soon as the system detects a temperature difference of 2°, warm or cooled air immediately begins to flow into the cabin.

To understand how the heater works, you need to pay attention to the handle of the device; two extreme positions deserve special attention - MAX and MIN. The fact is that when the handle is set to one of these indicators, the system begins to supply heat, not taking into account the data from the temperature sensor.

The VAZ-2110 stove provides for the presence of such a device as a gearmotor. The task of this device is to open and close the damper. A small-sized electric motor is extremely important in the operation of the heater. Even with a minor breakdown of the gearmotor, the system will be able to provide the car owner with only cold or only hot air. If this device breaks while the damper is closed, then the entire system will cease to perform its function. The main components of the heating device:

radiator;
a device that distributes air flows;
SUAO block;
ceiling sensor;
lever;
flap;
gearmotor.

Purpose of the radiator

The VAZ-2110 stove of the new model has a radiator, through which the air flowing into the vehicle is heated. Quite often on the global network you can find diagrams in which the radiator is designated as a heat exchanger. The heating process in the device occurs due to the supply of warm antifreeze. The radiator is connected to the cooling system of the power unit through several pipes and hoses. Coolant circulates inside the heat exchanger all the time. The volume of incoming air and its direction depend on the location of the damper. When the heater damper is in an intermediate position, part of the air flows through the heat exchanger, and the remaining volume bypasses the radiator. In the diagram you can see that the radiator of the new model differs from other models in several useful modifications.

Operating principle of the control system and ceiling sensor

The operating principle of the VAZ-2110 stove can be understood by studying components such as the control system and the ceiling sensor.

The function of the ceiling sensor is to determine the temperature inside the vehicle. Then all the information will go to the SUAO block, where the incoming value will be equal to the temperature that is reflected on the handle of the VAZ-2110 heating device. As a result of the verification, the position of the damper will be changed or remain the same. Everything will depend on the difference between the values being compared. Through this simple manipulation, the temperature inside the car is controlled.

When setting the device to any of the extreme values, the information from the ceiling sensor will not be taken into account. The SUAO block is a set of microcircuits on which the functioning of the heater directly depends. If malfunctions occur, both the sensor and the control system can be replaced without much labor.

The device of the damper and gear motor

Due to the gearmotor, the position of the damper that regulates the air supply changes. This component of the system is controlled by the control system block. If a functioning device fails, the damper stops moving. The device itself looks like a small electric motor. Most often, a broken device must be completely replaced, since repairs are quite problematic. The same principle applies to the operation of the damper.

What to do if the temperature of the heater in the cabin of a VAZ-2110 - 2112 is not regulated

When the cold season sets in, the car owner often discovers that the air temperature control system in the cabin of the VAZ 2110-12 does not function normally. The stove either blows cold air or operates at maximum heat output. Both options do not allow you to create a comfortable environment inside the car; in addition, at low air temperatures, the windows may fog up, which makes driving unsafe. You can solve the problem yourself if you know how to do it.

Stove design

This unit includes several devices. The radiator is the main element of the stove - it heats the air entering the cabin. It is located under the hood. The next component is the air distributor, equipped with special pipes that run through the cabin of the 2110.

Removing a faulty radiator, you can get to it through the hood

If we compare the “ten” with previous models, an important innovation has appeared in its heating system - an evaporator (the diagram includes it in the list). The device is installed in an air conditioning system. Not all owners know about its existence, since it rarely fails.

To control the operation of the heater, an SUAO unit is installed in the VAZ 2110 car, which is called a controller in the technical operating manual. The unit works in conjunction with a temperature sensor in the cabin; it is also called a ceiling sensor. The sensor reports the temperature to the unit, then this indicator is compared with the set temperature on the handle. If the indicators differ by more than 2°, warm or cooled air is supplied to the VAZ 2110 interior.

It’s worth taking a closer look at the handle, or more precisely at its extreme positions – MAX and MIN. If the heater knob is set to one of these indicators, heat is supplied without the operation of the temperature sensor in the cabin. The scheme includes all of the above elements.

The device of the “tens” heater includes another unit - a gearmotor, which is responsible for opening and closing the damper. The miniature electric motor performs an important task in the operation of the heating system, as evidenced by the diagram. If the gearmotor is faulty, the system will only produce cold or hot air. If the gearmotor fails when the damper is closed, the system will stop functioning. We have described the main components of the VAZ 2110 heater; the diagram contains a more detailed list.

Let us highlight the main components of the system:

Radiator.
Air distributor.
SUAO block.
Ceiling sensor.
Lever.
Damper.
Gearmotor.

Radiator

In the heating system, a radiator is installed for heating, which enters the VAZ 2110. It is also called a heat exchanger. Heating is carried out by the heat of the antifreeze. This component is connected to the engine cooling system by pipes and hoses. Antifreeze constantly circulates through the heat exchanger of the stove. The damper, based on the commands of the unit, directs the incoming air to the radiator or directly into the passenger compartment. If the heater damper is in an intermediate position, then one part passes through the heat exchanger, and the second bypasses the radiator. If we compare this part of the stove with previous generations of the VAZ, it has a number of useful improvements, as the diagram demonstrates.

The design of the heating system VAZ 2110-12

The VAZ 2110-12 is equipped with updated climate systems with automatic or manual adjustment of the air temperature in the cabin. They use three main components:

Temperature sensor.
A controller or electronic control unit that operates only in automatic mode.
A micromotor-gearbox, which is an executing device to which controller commands are sent, as a result of which the heater damper moves, forming the air flow.
Connecting wires and connectors.

When the temperature of the VAZ 2110 stove is not regulated, in most cases problems arise precisely in the heater control system. The sensor is located in the ceiling of the car interior; it sends a signal to the controller located in the cabin to the right of the driver, and the micromotor-gearbox is located in the engine compartment on the heater housing under the plastic windshield trim. It receives a command from the control unit and operates in the specified mode.

Heater valve VAZ 2110

Replacing the stove tap on a VAZ 2110

There is a possibility that most users of VAZ 2110 cars will not be able to find this tap in their car. It was installed on earlier and recently released modifications of the car, and therefore, if the model was purchased not so long ago, then this mechanism may not be in this place. Although, some craftsmen manage to install a similar mechanism on their car. The heating system is one of those that most often breaks down. This part of the car allows you to drive the vehicle in different weather conditions with increased comfort.

VAZ 2110 stove faucet

Adjustment of this stove tap. carried out remotely. In versions of VAZ 2101 - 2110 cars, this mechanism is one of the most frequently broken. After each trip, it is necessary to constantly monitor its valves. This is necessary to eliminate leaks. As soon as leaks are discovered, the equipment must be replaced immediately.

Note. It was this fact that forced the manufacturers of the VAZ 2110 to abandon the crane. But after modernizing the crane, they began to install it again.

Replacing the faucet

VAZ 2110 heater tap

To carry out work to replace this equipment, you must have a special tool on hand. You will need:

After each tool is ready, you must immediately begin replacing it. For this purpose, you must use the following methods:

The engine must be drained of coolant.
The heater has two hoses. They are secured with clamps. Liquid swells from one and flows into the other. These clamps need to be slightly loosened, but not completely unscrewed.

VAZ heater taps

They must be disconnected from their mounting points.

Note: if the valve is replaced due to insufficient sealing, then, most likely, all the coolant has already managed to drain into the car interior before the repair is carried out. This problem can be detected if there is a puddle of the same liquid under the passenger seat rug. Also, if there is no coolant in the system, a constantly cold air stream will flow from the stove.

An undoubted companion to a fluid leak is the presence of a specific odor in the cabin.

The two bolts are unscrewed with a key marked “7”.
The rubber insulation is removed.

Faucet for stove VAZ 2110

Note: the bolts must be unscrewed carefully, since the fastener itself is plastic and the slightest failure in the thread can lead to major complications.

The body is removed from the box.
The duct has a bracket nut that needs to be removed. A wrench with the number “10” is used.

Electric stove faucet

Using a screwdriver, you need to disconnect the clamps on the heater body.
The right air duct is disconnected first.

What you need to get the job done

To repair the stove temperature regulator you will need a few simple tools and devices common to most car enthusiasts:

control lamp (control);
two conductors with insulated contacts for a 13-pin block to which the control unit is connected;
small screwdriver;
a tool for removing the controller from the mounting socket;
A multimeter is a useful device that allows you to perform a wide range of measurements of parameters in the electrical system of a car.

Troubleshooting

Standard situation: the fan operates in all provided modes, but the heater only blows cold or hot air. In this case, you can conduct a fairly simple test. Turn on the ignition, turn off the heating fan and move the interior temperature control knob to the extreme left (minimum) or extreme right (maximum) position. In this case, you can determine by ear whether the micro-gearbox is working.

If it works, the heater fan is turned on at its fastest speed, and the temperature control is again moved to the far left and far right positions, allowing it to run in each of them for a few seconds. In this case, the sound of the air flow should change; if this is not the case, then this indicates a mechanical break in the connection between the electric motor and the damper or its jamming in one position. This will require further disassembly of the system and restoration of the functionality of the damper.

In a situation where during testing you cannot hear the operation of the micromotor-gearbox, you need to carry out other checks that will help you figure out why the stove temperature regulator is not working. Its handle must be set to the middle position. After this, remove it from its seat on the panel. Without disconnecting the pads, the controller should be turned towards you as much as possible.

We test the supply voltage to the control unit. To do this, you need to take a 12 V test lamp, connect one clamp contact in a small screwdriver, which is inserted into contact 3, with a black wire coming out of it. Insert the second contact into pin 6, which is located under pin 3 and the blue wire comes out of it. If the control lights up when the ignition is turned on, it means that power is supplied to the control unit, and the VAZ 2110 heater regulator stopped working for this reason. For diagnostics to proceed normally, the battery and on-board voltage must be at least 12.5 V.

If power is supplied to the controller, you need to turn off the ignition and disconnect the large X1 block with 13 connectors. Next, you need to take two conductors with contacts that can be connected to the controller plugs. One wire attaches to pin #2 in this connector, it will be the first one on the right in the top row when looking directly at the connector. The second end of the conductor is connected to the positive connector of the multimeter. The other wire connects to connector No. 8, which is located in the top row in 4th place, if you count from the right. The conductor is connected to the negative terminal of the multimeter.

VAZ 2110 heater blows cold, why?

Many owners of “ten” complain that at some point the stove constantly blows cold air and no amount of turning the handles of the automatic heater control system can save the situation. There can be a lot of problems and malfunctions. For example, the ACS controller itself is faulty, the ceiling sensor or micro-geared motor is faulty and simply does not open or close the damper. Another reason is the air (air lock) in the heater radiator, which is simply not capable of heating the air passing through it. Below is a schematic representation of the VAZ 2110 heater device .

Heater dampers VAZ 2110

Often the cause of poor performance of the “tens” heater is the damper of the VAZ 2110 heater . The damper may not close tightly or open poorly. The heater flap itself is made of plastic, which can become warped and perform poorly over time. Many car owners buy a metal damper and change it themselves. How to check the functionality and evaluate the condition of the heater damper? Everything is quite simple, remove the central air duct deflector and there you have it - a damper! Let's look at the photo.

Next, carefully inspect the damper, turn on the stove, turn the controls on the ACS unit and see if the damper works at all. How does it move, does it fit tightly. If she does not respond to commands, then the problem may not be her at all. For one thing, you can see if the lever for redirecting the air flow from the glass to the feet works.

Heater fan VAZ 2110

It is quite simple to determine the performance of a stove fan by looking at the noise. If the fan motor burns out, then it naturally will no longer work. However, before rushing to change the stove fan, you need to make sure that the fuse has not blown. As we already wrote above, the fan of the VAZ 2110 stove is located not in the cabin, but in the engine compartment. To get to it, you will need to remove a special apron that separates the engine compartment from the heater housing, vacuum brake booster and windshield wiper mechanism. The actual photo is below for clarity.

So we got to the stove fan, removing the apron and heater casing. By the way, next to you you will see the cabin filter, in the housing a little to the left. It needs to be pulled out and cleaned. If no one has changed the filter before you, over many years of operation it is seriously clogged with debris and interferes with the normal circulation of air, which is sucked into the cabin of the VAZ 2110.

Checking the automatic control system

Diagram of the automatic heater control system : 1 – fan electric motor;
2 – additional resistor; 3 – controller; 4 – mounting block; 5 – ignition switch; 6 – cabin air temperature sensor; 7 – recirculation switch; 8 – recirculation valve; 9 – micromotor gearbox for heater damper drive; A – to the instrument lighting switch; B – to power supplies

Electric sema VAZ 21102

— blocks for connecting the rear window washer motor.
B
- blocks for connecting the injection system harness.
C
- to the warning light harness block.
D
— block for connection to the on-board computer.
E
- to the headlight cleaner harness block.
F
— block for connection to the fuel level sensor in the electric fuel pump module.
G
- to the rear window heating element.
H
- block for connecting an additional brake signal.
J
- to the trunk lock motor.

The diagram does not conventionally show that in the instrument panel wiring harness, the second ends of all wires of white, black, orange, white with a red stripe and yellow with a blue stripe are connected to each other at the same points.

Connection diagram of the engine management system 2111 with distributed fuel injection of the VAZ-21102 car

1 – injectors 2 – spark plugs 3 – ignition module 4 – diagnostic block 5 – controller (since 2000, a modification of the system with M1.5.4N or “January-5.1” controllers has been produced) 6 – cooling system fan electric motor 7 – block attached to instrument panel wiring harness 8 – main relay 9 – fuse connected to the main relay 10 – electric fan relay 11 – fuse connected to the electric fan relay 12 – electric fuel pump relay 13 – fuse connected to the electric fuel pump relay 14 – mass air flow sensor
15 – throttle position sensor
16 – coolant temperature sensor
17 – CO potentiometer (not installed on vehicles with a modified control system, CO adjustment is carried out using the DST-2 device through the diagnostic block)
18 – idle speed regulator
19 – knock sensor
20 – crankshaft position sensor
21 – vehicle speed sensor
22 – immobilizer control unit
23 – immobilizer status indicator
24 – electric fuel pump with fuel level sensor
25 – oil pressure warning lamp sensor
26 – coolant temperature indicator sensor
27 – oil level sensor
28 – knock sensor (installed on vehicles with a modified control system)

Fuse box VAZ-2110, VAZ-2111, VAZ-2112

F1 - 5A - License plate lamps. Instrument lighting lamps. Side light indicator lamp. Trunk light. Left side marker lamps. F2 - 7.5A - Left headlight (low beam). F3 - 10A - Left headlight (high beam). F4 - 10A - Right fog lamp. F5 - 30A - Electric door window motors. F6 - 15A - Portable lamp. F7 - 20A - Electric motor of the engine cooling system fan. Sound signal. F8 - 20A - Rear window heating element. Relay (contacts) for turning on the heated rear window. F9 - 20A - Recirculation valve. Windshield and headlight cleaners and washers. Relay (coil) for turning on the heated rear window. F10 - 20A - Reserve. F11 - 5A - Starboard side marker lamps. F12 - 7.5A - Right headlight (low beam). F13 - 10A - Right headlight (high beam). Indicator lamp for turning on the high beam. F14 - 10A - Left fog lamp. F15 - 20A - Electric seat heating. Locking the trunk lock. F16 - 10A - Relay-breaker for direction indicators and hazard warning lights (in emergency mode). Hazard warning lamp. F17 - 7.5A - Interior lighting lamp. Individual backlight lamp. Ignition switch illumination lamp. Brake light bulbs. Clock (trip computer). F18 - 25A - Glove box lighting lamp. Heater controller. Cigarette lighter. F19 - 10A - Door locking. Relay for monitoring the health of brake light lamps and side lights. Direction indicators with warning lamps. Reversing lamps. Generator excitation winding. On-board control system display unit. Instrument cluster. Clock (or trip computer). F20 - 7.5A - Rear fog lamps.

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SAUO pinout:

The SAUO receives information from:

– cabin air temperature sensor (No. 6), which has a built-in small-sized fan.
– MMR (micromotor reducer) (No. 9), information about the position of the heater damper.

Adjusting the automatic control system

Place a regular mercury thermometer near the temperature sensor on the ceiling. Turn on the heater controller and set the fan control knob to position “A”, and set the temperature dial to 2C higher than the air temperature in the cabin. If, with the doors and windows closed, after 15 minutes the temperature in the cabin does not correspond to the set temperature, then the heater control unit should be adjusted.

To adjust, pull out the SAUO block from the socket and rotate the regulator on the left side of the controller:

turn clockwise to increase temperature.
turn counterclockwise to decrease.

Check the operation of the heating system again by repeating the above steps.

Stove design

If we compare the “ten” with previous models, an important innovation has appeared in its heating system - an evaporator (the diagram includes it in the list). The device is installed in an air conditioning system. Not all owners know about its existence, since it rarely fails.

Let us highlight the main components of the system:

Radiator.
Air distributor.
SUAO block.
Ceiling sensor.
Lever.
Damper.
Gearmotor.

Radiator

SAUO repair

Before repairing the SAUO VAZ 2110 unit, you should make sure that the problems with the stove are associated with it. To do this, you should connect a known working heater control unit (borrow from a friend or from a store). If there are no problems with the stove with the working unit of the automatic control system, then we try to find out what the reason is. If the obviously working unit of the automatic control system did not help, then the problem with the stove is somewhere else.

Remove the buttons next to the SAUO block. We take out the stove control unit. Set the controls to position 0 and remove, and then remove the front cover and glass from the latches. Unscrew 2 screws in front and 1 in back.

We remove the board from the plastic case and check the integrity of all tracks, jumpers and resistors.
In this example, a broken jumper was found. We solder it on one side and the other. Reassemble in reverse order. Now all speeds of the SAUO block work .