Connection diagram for heated rear window VAZ 2110 injector 8 valves

Rear window heating diagram for VAZ 2110, 2111 and 2112

1 – mounting block; 2 – ignition switch; 3 – rear window heating switch; 4 – control lamp for turning on the heating; 5 – rear window heating element; K6 – additional relay; K7 – relay for turning on the heated rear window; A – to power supplies

The rear window heating is activated using the auxiliary relay K7 (type 904.3747-10). When the heating is turned on, the orange lamp 4, which is located next to the button, lights up. The heated rear window only works when the ignition is on, since voltage is supplied to the button through an additional relay K6, which is activated when the ignition is turned on. Power is supplied to the heating threads through the contacts of relay K7 from fuse F7, which is directly connected to the power sources.

Shendys › Blog › Mounting block 2110

Diagram of the main mounting block of fuses and relays

Designations of fuses and relays of the mounting block

Open cover of the mounting block Location of the mounting block in the machine

Circuit breakers

Additional fuse diagram

Location of additional fuse in the mounting block

Troubleshooting procedure

1. We check fuses F8 (20A) and F8 (20A) (mounting block).
2. We check the serviceability of the rear window heating button. Is there a “plus” on pin No. 10 of the switch button and after turning on the button on pin No. 9 (a test lamp or multimeter will be useful).
3. We check +12V at the Ш5-2 output and at the connector near the rear window.
4. We check the wires and their connections.
5. We check the rear window heating relay - K7.
6. We check the integrity of the glass heating filaments.

The algorithm for determining the cause of a malfunction is similar for most cars, the only differences are in the names of fuses, relays and connectors.

By the way, did you know that to extend the service life of the heating elements, they use a Glass Heating Regulator (DOC), and you can also install a Fresnel lens on the rear window?

Diagram of the VAZ engine management system with BOSCH controller - ECM 21104 1.6 16V

1 – block of the ignition coil wiring harness to the ignition system harness; 2 – block of the ignition system harness to the ignition coil wiring harness; 3 – ignition coils; 4 – immobilizer warning sensor; 5 – immobilizer control unit; 6 – spark plugs; 7 – nozzles; 8 – diagnostic block; 9 – block of the ignition system harness to the ABS cabin group harness; 10 – controller; 11 – electric fuel pump; 12 – block of the ignition system harness to the fuel level sensor harness; 13 – fuel level sensor harness connector to the ignition system harness; 14 – block of the ignition system harness to the injector harness; 15 – injector harness block to the ignition system harness; 16 – block of the ignition system harness to the side door harness; 17 – speed sensor; 18 – idle speed regulator; 19 – throttle position sensor; 20 – coolant temperature sensor; 21 – mass air flow sensor; 22 – oil pressure warning lamp sensor; 23 – phase sensor; 24 – oxygen sensor; 25 – crankshaft position sensor; 26 — knock sensor; 27 – solenoid valve for purge of the adsorber; 28 – oil level sensor; 29 – coolant temperature indicator sensor; 30 – block of the ignition system harness to the instrument panel harness; 31 – instrument panel harness connector to the ignition system harness; 32 – ignition relay; 33 – ignition relay fuse; 34 – fuse for the electric fuel pump power supply circuit; 35 – electric fuel pump relay; 36 – electric fan relay; 37 – controller power supply fuse; 38 – ignition system harness block to the air conditioner connector; 39 – instrument cluster; 40 – ignition switch; 41 – electric fan of the cooling system; 42 – on-board control system unit; 43 – starter relay; 44 – contacts of the 8-terminal blocks of the instrument panel harness and the front harness; 45 – contacts of the 21-terminal blocks of the instrument panel harness and the rear harness; 46 – trip computer; 47 – diagnostic connector.

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I was faced with the heated rear window of my car not working, the problem was...

Source

Fuses and relays VAZ 2108, 2109, 21099

Most electrical circuits are protected by fuses. Electric motors of gear motors (windshield wipers, rear window wipers (VAZ-2108.2109), headlights - if installed) are protected by automatic reusable bimetallic fuses.

The power supply circuit of the injection system (engine 2111) is protected by a fuse-link made of wire with a conductor of reduced cross-section (1 mm2). The battery charging, ignition (carburetor engines), engine starting, and the “generator - ignition switch - mounting block” circuits are not protected.

Powerful consumers (starter, headlights, cooling system fan motor, electric fuel pump, etc.) are connected via a relay.

The relay and fuse box in the VAZ 2108-09-099 (carburetor, injector) is located under the hood, in the compartment in front of the windshield on the left side.

Fuse mounting block 2114-3722010-18

Relay/fuse number Explanation K1 Relay for turning on headlight cleaners K2 Relay for turning indicators and hazard lights K3 Relay for windshield wiper K4 Relay for monitoring the health of lamps K5 Relay for turning on power windows K6 Relay for turning on sound signals K7 Relay for turning on electric heating of the rear window K8 Relay for turning on high beams headlights K9 Relay for low beam headlights F1-F16 Fuses

Fuse mounting block 2114-3722010-60

READ How to replace brushes on a VAZ 2106 generator

Relay/fuse number Explanation K1 Relay for turning on the headlight cleaners K2 Relay for turning indicators and hazard lights K3 Relay for the windshield wiper K4 Relay for monitoring the health of brake light lamps and side lights K5 Relay for turning on the power windows K6 Relay for turning on the sound signals K7 Relay for turning on the electric heating rear window K8 Headlight high beam relay K9 Headlight low beam relay F1-F16 Fuses F1-F20 Spare fuses

Fuse mounting block 17.3722

Relay/fuse number Explanation 1 (K6) Headlight wiper relay 2 (K1) Rear window washer timing relay 3 (K2) Turn signal and hazard warning relay breaker 4 (K3) Windshield wiper relay 5 Contact jumpers in place of lamp health monitoring relay 6 (K10) Relay for turning on the heated rear window 7 Spare fuse 8 (K5) Relay for turning on the high beam headlights 9 (K11) Relay for turning on the low beam headlights 10 Fuse 11 (K9) Relay for turning on the electric motor of the engine cooling fan 12 (K8) Relay for turning on the sound signal

Decoding the fuses of the mounting block for VAZ 2109, 2108, 21099

F1-F16 - mounting block 2114-3722010-60, 2114-3722010-18.

Numbers from 1 to 16 - old-style mounting block 17.3722

Fuse N Description 1 (8 A), F9 (7.5 A) Right fog lamp 2 (8 A), F8 (7.5 A) Left fog lamp 3 (8 A), F1 (10 A) Headlight cleaners (in moment of switching on). Relay for switching on headlight cleaners (contacts). Headlight washer activation valve 4 (16 A), F7 (30 A) Headlight cleaners (in operating mode). Headlight wiper activation relay (winding). Heater fan motor - heater fuse. Window washer motor. Rear window wiper gearmotor. Rear window washer timing relay .Valves for turning on the windshield and rear window washer. Relay (coil) for turning on the electric fan of the engine cooling system. Relay (coil) for turning on the heated rear window. Rear window heating indicator lamp. Glove compartment lighting lamp 5 (8 A), F16 (15 A ) Direction indicators and relay-interrupter for direction indicators and hazard warning lights (in turn indication mode). Turn signal indicator lamp. Rear lights (reversing lamps). Gearbox and windshield wiper activation relay. Generator excitation winding (when starting the engine). Brake fluid level warning lamp. Oil pressure warning lamp. Carburetor air damper warning lamp. Parking brake warning lamp. STOP light display lamp. Coolant temperature indicator. Fuel level indicator with reserve warning lamp. Voltmeter 6 (8 A), F3 (10 A) Rear lights (brake lamps). Interior lighting 6 (8 A), F6 (30 A) Front door power windows. Power window relay 7 (8 A), F10 ( 7.5 A) License plate lights. Engine compartment lamp. Instrument lighting lamps. Exterior lighting control lamp. Heater lever illumination display. Cigarette lighter lamp 8 (16 A), F5 (20 A) Electric motor of the engine cooling system fan, and its activation relay (contacts). Sound signal and its activation relay 9 (8 A), F10 (7.5 A) Left headlight ( side light).Left rear light (side light) 10 (8 A), F11 (7.5 A) Right headlight (side light).Right rear light (side light) 11 (8 A), F2 (10 A) Turn indicators and Hazard warning relay-interrupter (in alarm mode). Hazard warning lamp 12 (16 A), F4 (20 A) Rear window heating element. Relay (contacts) for turning on the rear window heating. Plug socket for portable lamp. Cigarette lighter 13 (8 A), F15 (7.5 A) Right headlight (high beam) 14 (8 A), F14 (7.5) Left headlight (high beam). Indicator lamp for high beam headlights 15 (8 A), F13 (7.5 A) Left headlight (low beam) 16 (8 A), F12 (7.5 A) Right headlight (low beam)

Diagram of the mounting fuse block for VAZ 2109, 2108, 21099 (block 17.3722)

(the outer number in the designation of the wire tip is the number of the block, and the inner number is the conventional number of the plug)

Relay/fuse number Explanation K1 Rear window washer timing relay K2 Relay-breaker for turn signals and hazard lights K3 Windshield wiper relay K4 Relay for monitoring the health of lamps (contact jumpers are shown inside, which are installed instead of the relay) K5 Relay for turning on the high beam headlights K6 Relay for turning on the headlights wipers K7 Power window relay K8 Relay for turning on the sound signal K9 Relay for turning on the electric motor of the engine cooling system fan K10 Relay for turning on the heated rear window K11 Relay for turning on the low beam headlights

Diagram of the mounting fuse block for VAZ 2109, 2108, 21099 (2114-3722010-60)

Relay/fuse number Explanation K1 Relay for turning on headlight cleaners K2 Relay for turning indicators and hazard lights K3 Relay for windshield wiper K4 Relay for monitoring the health of lamps K5 Relay for turning on power windows K6 Relay for turning on sound signals K7 Relay for turning on heated rear window K8 Relay for turning on high beam headlights K9 Relay for low beam headlights F1-F20 Fuses

Conventional numbering of plugs in the blocks of the VAZ 2109-09-099 mounting block for connecting wires in the passenger compartment:

Ш9 - block connecting to the rear wiring harness;

Ш1-Ш4 - blocks connecting to the instrument panel wiring harness.

Conventional numbering of plugs in the blocks of the VAZ 2109-09-099 mounting block for connecting wires in the engine compartment:

Ш5 and Ш6 — blocks for connecting the front wiring harness;

Ш7 and Ш8 — blocks for connecting the wiring harness of the left mudguard;

Ш11 - block for connecting the wiring harness of the air supply box.

The question is often asked where the heater relay is located on the VAZ 2109 - the heater relay itself does not exist for the VAZ 2108, 2109, 21099. Older models have an ignition relay, through which the stove is also powered:

In more recent VAZ models, the stove is powered directly through the ignition switch.

SEE ALSO - fuses and relays for...:

#4 AnDmitrAl

• Car make: Hyundai CRETA LADA 21102
• From: Orsk, Orenburg region

View Garage

those. is the relay ok? this is at least something) where can I find the heating terminals? behind the glass seal? I have wires going into the seal. I looked in the trunk. But no wiring is visible from the glass. Yes, I’m not experienced yet, I know!)))

The heated rear window of the car does not work. Where to dig? Useful advice from an AUTO electrician.

Not my 99, too, somehow the heating stopped working , the problem was poor contact of the ground wire to the body (rust), from which the wires began to melt. There's nothing in the trunk, don't even look for it.

terminals on the glass on the sides. the wires go under the seal, the minus is screwed with a nut to the body under the plastic trim of the rear pillar (where the upper mounting point of the rear passenger seat belt is, this definitely needs to be removed in order to clean the mass.

First, turn on the heating and measure the voltage at the positive terminal next to the rear window, you can use a light bulb.

• Car make: VAZ 21093
• From: Moscow region

Sources:

https://avtoladagood.ru/instrukcii-po-remontu-avtomobiley/1881-ne-rabotaet-obogrev-zadnego-stekla-vaz-2110-prichiny.html https://alians-avto96.ru/vaz/ne-rabotaet -obogrev-zadnego-stekla-vaz-2110.html https://sarterminal.ru/remont-avto/ne-rabotaet-podogrev-zadnego-stekla-vaz-21099.html

Reasons why the heating does not work on the rear window of the VAZ 2110

Almost all VAZ 2110 cars have a rear window heating system. But even if this system is not provided for in some models, it is usually “finished”, since here we are talking about basic comfort today. If the rear window heating does not work on a VAZ 2110, this creates many problems.

As a rule, heating is especially needed in cloudy, cold weather in autumn and early spring, when the glass becomes covered with condensation, blocking the driver’s visibility of what is behind the car.

Rear window with heating filaments

This lack of vision is especially dangerous when parking. The same can be said about winter use, when the frost literally draws patterns that you don’t want to admire at all.

Why do the heating, heater and wipers fail at the same time?

Separately, situations stand out when the stove, wipers, and heated rear window do not work. Sometimes, along with these systems, the washer also stops working.

A one-time failure of these devices causes a lot of problems; problems can occur periodically, but they affect the safety of the car. The peculiarity of this breakdown is that the operation of all components is tied to one fuse.

Ways to eliminate the defect:

• To quickly solve the problem, just replace the fuse;
• When examining a faulty unit, it is easy to notice burnt tracks, which can also be soldered.

How the system works

The operating principle of heating is very simple; it is used today in almost all cars, including foreign cars. Something simpler and better has not yet been invented. A conductive thread is applied to the rear window on the interior side, which heats up; accordingly, the glass is heated, which eliminates fogging from the inside, as well as snow and ice located on the outside.

Rear window heating operation diagram

This system is made up on a VAZ 2110:

• the thread itself, which provides heating;
• wiring going to it;
• heating relay;
• switch with signal light inside;
• fuse.

That is, nothing complicated for a craftsman. Considering that the size of the rear window of the VAZ 2110 is 121.3x67.6 cm, the heating size is usually only a couple of centimeters smaller, and essentially covers the entire surface, providing complete heating and good visibility of what is happening behind. There is no point in installing a much smaller heating system, because the driver should see the entire road behind, and not part of it.

General concepts

In order for the glass to heat evenly and to a strictly defined temperature (sufficient to evaporate moisture, but not exceeding safe limits), a special electrically conductive thread (thin flat wire) is used, which has a certain strictly standardized resistance.

When current flows through it, it heats up. just like the coils in electric stoves and kettles heat up, only at a much lower temperature. Thanks to this heating, and also because it occurs evenly over the entire plane of the glass (since the thread is applied to it at equal distances), the latter quickly dries and is cleared of moisture.

Causes of malfunctions and their identification

The heated rear window works as soon as the ignition is turned on, and the glass should clear within a couple of minutes. But sometimes it happens like this:

1. The power-on signal does not light up, although the button is pressed, the glass does not defrost (remains foggy);
2. The heating does not work, but the control light is on;
3. The glass thaws in stripes;
4. Heating is insufficient. This phenomenon occurs if the glass is heavily frozen. In this case, simply clear it of ice mechanically.

Rear window defogger time relay

The root cause of other phenomena should be sought:

• in relay control;
• check the condition of the fuse in the box;
• Check to see if the connectors on both sides of the rear window are secure. They may need to be cleaned;
• also check for breaks in the supply wires in the switch itself;
• if everything is in order here, you should check the conductive thread. With the engine running, you need to check the voltage approximately in the middle of each section (strip) of the thread. If the meter shows about 6 volts, everything is fine. If the readings are about ten, or, conversely, about zero, it means there is a break. A technique will help to determine exactly where the break is: the device has a pointed electrode, wrapped in a wide foil strip, and is led along a “suspicious” conductive strip. Where there is a voltage surge, there is a break;
• but often you can literally see the break - the thread has come apart in some area.

Heating system design, typical malfunctions

The glass heater in the car is quite simple. Typically, threads are applied to the glass surface, which can heat up when current passes. Other components that ensure startup, proper operation and power supply of the circuit are a button, wiring, relay, fuse, battery.

Frequent problems:

1. The heating is ineffective and streaks of fog appear. The defect indicates damage to the threads. To identify the problem, you need to inspect the stripes; the place of damage is easy to detect - it will be foggy.
2. Heating and sweating occur very slowly, which means poor contact and possible problems with voltage. It is necessary to check the indicators at the input and storage.
3. If the heating does not work at all, but the light on the button lights up, the fuse may have failed or the problem lies in the power connectors.
4. If the system does not work and the control light does not light up, you need to pay attention to the heating relay. The button, voltage and ground are checked.
5. With a working system, defrosting does not occur. This happens when winter comes and the ambient temperature drops significantly, the glass freezes up. The heater power is not enough to thaw the ice. It is recommended to clean the glass by hand so that the threads can work normally.

Complete failure of the heating system is rare. The integrity of the threads is often compromised. If problems occur with the device, you can carry out repairs yourself.

Device

First, let's get acquainted with the structure of this system.

It includes the following elements:

• The thread that provides heating.
• Wiring (positive and negative).
• System switch. Equipped with a warning light inside.
• Heating relay.
• Fuse.
• Control buttons.

This system works very simply. There is a conductive thread on the rear window. It warms up when power is applied. This way the glass is heated and condensation is removed from the inside.

Why does the rear window heating not work on a VAZ-2110 car? The reasons may be trivial. After all, the device has no mechanical parts. Therefore, all you need for diagnostics is a multimeter and a test lamp. This is the only way to find out why the heated rear window of the VAZ-2110 does not work. There is a photo of the diagram in our article.

Below we will look at the main elements to check.

Improved windshield

As you know, in VAZ 2107 cars the manufacturer did not provide such a function as heating

windshield. There is only its air flow, which allows you to remove the “foggy glass” effect. If you want to improve your car, you can become the owner of a heated windshield. This athermal glass is easily delivered on its own as all the necessary components are attached to it.

This type of glass is ideal for the VAZ 2107, so a snowy, frosty morning can no longer ruin your mood. Of course, heated glass is quite expensive compared to its simple counterpart. But you probably won't regret this windshield upgrade.

Source

The heated rear window of the VAZ 2110 does not work, what is the reason?

Almost all VAZ 2110 cars have a rear window heating system. But even if this system is not provided for in some models, it is usually “finished”, since here we are talking about basic comfort today. If the rear window heating does not work on a VAZ 2110, this creates many problems.

As a rule, heating is especially needed in cloudy, cold weather in autumn and early spring, when the glass becomes covered with condensation, blocking the driver’s visibility of what is behind the car.

Rear window with heating filaments

This lack of vision is especially dangerous when parking. The same can be said about winter use, when the frost literally draws patterns that you don’t want to admire at all.

How the system works

The operating principle of heating is very simple; it is used today in almost all cars, including foreign cars. Something simpler and better has not yet been invented. A conductive thread is applied to the rear window on the interior side, which heats up; accordingly, the glass is heated, which eliminates fogging from the inside, as well as snow and ice located on the outside.

Rear window heating operation diagram

This system is made up on a VAZ 2110:

1. the thread itself, which provides heating;
2. wiring going to it;
3. heating relay;
4. switch with signal light inside;
5. fuse.

What does the button look like?

Surprisingly, this button is so inconspicuous that you may not notice it even after many years of using your iron horse. This is explained quite simply, because this element does not have a stationary location, “walking” throughout the entire dashboard depending on the car model.

In addition, the symbol of the key itself can change, although most often it is presented in two configurations, looking like arrows forming a circle or a car body with an internal recirculation icon located inside.

But it is this magic button that helps to heat the interior in a matter of minutes, coping with the task better than any other methods combined, unless, of course, we are talking about heating the windshield and side mirrors, for which there are special control keys.

Diagram of elements of the glass heating system

A detailed diagram of the heated rear window system of the VAZ 2110 is shown in the figure below, according to it:

• The glass heating element is activated using an auxiliary relay designated K7 of type 904.3747-10, which is installed in the mounting block
• When the heated rear window is turned on, control light 4, located next to the switch, immediately lights up, it illuminates the switch key in red or orange.
• In VAZ 2110 cars, the heated rear window can only be turned on if the ignition is turned on, because the voltage to switch 3 goes through another relay designated K6, which is activated when the ignition is turned on.
• The power supply to the glass heater is supplied from relay contacts K7 through fuse F7, connected directly to the power source
• If you turn on the heating, but the rear window is not heated, then you need to check the condition of fuse F8, as well as the wires connecting them, and also relay K7 and switch

Complete heating connection diagram

Checking and replacing the heating relay

Typical VAZ glass heating relay

Problems that arise over time with heating the rear window are often associated with circuit problems, a blown fuse, as well as a heating relay:

• In VAZ model cars, the rear window heating relay is used to turn on the heating for a certain time within fifteen minutes
• This system operates thanks to a built-in timer.
• For vehicles in which a relay was installed, such a system can be located in the standard relay block or in the fuse box
• And in place of the standard relay, a new one is simply inserted and the heating is turned on with a standard button
• It is very important here that the winding of this relay is constantly connected to ground.
• The purpose of the relay is to turn off the heating when the motor is not running. The most important thing is that heating does not drain the battery

Fuse

If your rear window heating does not work, your VAZ-2110 should be checked for a blown fuse. In the mounting block, check the elements in connector F8 (usually they are rated at 20 amperes). If the fuse looks like the one in the photo below, it needs to be replaced.

For the future, experienced car owners advise carrying a spare set in the glove compartment. After all, if the fuse for the fuel pump burns out (especially while on the road), then the car will not be able to start at all.

What is the reason for this phenomenon? Most often this happens due to a short circuit. At one point, the voltage on the on-board network increased above normal. To prevent the contacts from melting, the system is simply turned off by breaking the connecting elements. In this case, this is +12 V power and conductive elements on the rear window.

How does a wiring diagram benefit you?

Although domestic cars will be simpler than foreign cars, they all consist of a huge variety of different components, power and fuel units and, of course, sophisticated electrical equipment. The dear VAZ-2112 could not do without a modern electrical part. The right turn has stopped working, there is no low beam headlights, the horn is silent and does not buzz, a light bulb in the trunk has burned out or the radiator fan has stopped turning on. What to do, where to run and who to ask?

Every car owner should at least get to know the electrical part of his car in general terms. Where to begin? Rummage through the glove compartment, and if your wife has not yet put things in order, you can find there the “Operating Manual for the VAZ-2112.” Among other things, this necessary book contains a lot of important information on the electrical part. Having at least a little insight, in the future you will not only save on repairs at a service station, but also avoid ordering a tow truck when suddenly your “beloved” becomes rooted to the spot in the middle of a field.

Troubleshooting and Troubleshooting

Common manifestations of heating malfunctions, which should start working simultaneously with the ignition being turned on, may include the following symptoms:

1. If there is a light signal for the system operation, the glass is not heated.
2. The same thing happens when the button is pressed, but without a light signal.
3. Not all glass thaws (this usually shows up as strips of thawed and frozen water).
4. The surface does not thaw completely - due to severe freezing or attempts to mechanically remove ice.

The search for the causes of the malfunction should begin by replacing the corresponding fuse, which is responsible for the operation of this device in the VAZ-2110. In our case, this is a fuse marked F8 in the corresponding block, which protects the heated rear window. This block is located to the left and slightly lower from the steering wheel. For correct diagnosis, the fuse, even if it looks intact, needs to be replaced with a new one and the heating operation checked.

If the previous manipulation did not bring results, you need to check the car wiring from the rear window heating button. Burnt wires or breaks along their route will clearly indicate the cause of the malfunction. It is worth noting that a completely non-functional system is quite rare - much more often only some part of it fails. In this case, all heater filaments are usually checked for breaks, since it is obvious that they do not heat up due to the fact that current has stopped passing through them.

The most common cause of this phenomenon is mechanical damage to the conductors. Despite a fully functional system that will help melt the ice on the rear window of a car in a short time, many impatient drivers are in a hurry to free this surface from the “ice captivity” outside or from fogging from the inside using various improvised means, while harming the performance of the profile device due to vibration or physical contact.

If the system does not work correctly, the car owner checks which heating threads have stopped working. To do this, you just need to turn on the device and visually observe in which areas the glass does not heat up. Next, those places where the system does not work are carefully cleaned and inspected with a magnifying glass - this is how the place where the conductor breaks is located. In this case, it makes sense to check all conductive threads. Firstly, a break even on one strip can occur more than once, and secondly, you can accidentally discover places of future breaks, which can be expressed in the form of burrs, sagging, tears and scratches.

After identifying all emergency and unreliable places, it is necessary to treat them with a special paste (lubricant, spray), which, when dried, forms a conductive substance and completely restores the functionality of the rear window heating system.

Operating principle

The main essence of the action of this element is to use the air inside the car interior and block its entry from the outside, thereby ensuring the recirculation process and, as a result, the fastest possible warm-up. Simply put, this simple technique allows you to close the entire air flow inside the vehicle, after which the stove comes into use.

Upon deeper study of the issue, it turns out that the button operates in accordance with the following algorithm:

1. When it is turned on, the electro-pneumatic valve automatically opens.
2. After this, the intake manifold flap closes, blocking the flow of air from outside.
3. The recirculation mode will be supported as long as the fan is running, driving air through the heating system.

That is, the operation of this heating mode becomes possible only when the engine is running and nothing else. You can check this by looking at the interior chips, which will maintain voltage when the ignition and the recirculation button are turned on.

It is also important to remember that the absence of new oxygen supplies from outside is fraught with the formation of strong condensation on the glass, which can be eliminated by one of two methods: ventilation after 15 minutes of heating or turning on the external air supply to the cabin.

In addition, this problem can be solved in a simplified way by using on-board air conditioning, which, as is known, dries the air and maintains an optimal temperature regime inside the car.

Damage to the heating filament

For what other reasons does the rear window heating not work? VAZ-2110 is equipped with special threads. A break can happen here too. The threads are a small layer of conductive substance.

It is easily damaged by the slightest mechanical impact (even with such harmless actions as removing tint). You can determine the location of the damage using a magnifying glass. It is advisable to carry out diagnostics during daylight hours. Damage to the threads is one of the obvious reasons why the rear window heating partially does not work on the VAZ-2110.

What causes interior glass to sweat?

Why do the windows on a VAZ 2110 fog up? This is a question that baffles half of car owners. I’ll say right away that this most likely happens in cold weather due to increased humidity in the car interior, from which I’ll now explain:

• The most common reason is if the driver has a hangover, the windows sweat from fumes
• The second most common reason is that the interior heating radiator is leaking quietly, the liquid collects under the rugs, while the leak is small, it is almost unnoticeable, so it is worth checking the condition of this radiator
• Another reason for glass fogging may be the wrong direction of the stream of warm air from the stove; if the glass is blown, it dries, when it is not blown, it may begin to “sweat”, this, by the way, is the main reason why the windshield on a VAZ 2110 sweats

How to repair the conductive layer? Method No. 1

You can do this yourself. To do this, you do not need to dismantle the glass. All you need is to purchase a special conductive paste (available in auto stores or on the market) and apply it to the damaged area. It is important to prepare it carefully. To do this, carefully clean the varnish from the surface and degrease the area with alcohol (use a piece of soft rag). Next, we clean the ends of the damaged threads. We apply adhesive tape or electrical tape to its upper and lower parts so that there is a small gap (no wider than the thread itself). We apply a special adhesive into it. After a day, the composition will completely dry out. Next, you can remove the remaining tape and check the system for functionality. If the heating works only partially, it means that the break occurred in several places. Find the second place where the thread is damaged and treat it with a conductive compound using a similar principle. That's all. We will also consider the old-fashioned method of repairing threads.

The procedure for repairing a faulty OZS system

Having determined the reason why the rear window heating does not work, you can begin to repair this system.

1. If the fuses or relays of the OSZ system are faulty, then the faulty parts must be removed. Replacing them with new, functional ones is not difficult. The main thing is that they are installed as indicated by the on-board electrical system diagram.
2. In the case where the culprit of the damage in the OZS system is the terminal connection, restoring the heated rear window is also not difficult. It is enough to clean the contacts in the terminals. The terminal box may need to be replaced, but this will not take much time either.
3. If the glue that was used to attach the contact on the rear window turned out to be of poor quality and peeling occurred, then in this case you need to buy a new high-quality conductive glue. Remove the layer of old glue from the peeled contact using a napkin with an alcohol solution. Then apply a layer of new connector and glue the contact in place.

1. If a wire is torn off on one of the buses, it is necessary to solder this wire to the old place using the connection diagram. The procedure is as follows:

• remove the remnants of old solder from the wire, stripping the end; in addition, you need to clean the connection point on the bus;
• Using a brush, apply rosin paste as a flux to the cleaned surfaces of the bus and wire;
• Apply solder containing three percent silver to the cleaned and rosin-coated wire core;
• solder the wire to the bus, while avoiding overheating of the surfaces.

1. The greatest care when repairing the heated rear window with your own hands is required if a break is detected in the conductive threads of the heating element of the OZS. To make this work easier, special repair kits for this system are available. To correct the damage, perform the following steps:

• in the area of ​​the rupture, clean an area six millimeters long in each direction from the damage site;
• wipe the cleaned area with a napkin or cloth soaked in alcohol or an alcohol solution;
• On both sides of the damaged thread, stick thin strips of repair adhesive tape or ordinary construction tape, if there is no repair kit. Avoid sticking adhesive tape onto nearby threads to avoid damaging them;

• if you have a repair kit, mix the hardener with a silver-colored composition, which, after application, will act as a conductive thread. After mixing, apply this composition with a stick or brush to the damaged area, closing the circuit.

• if there is no repair kit, then the role of a special mixture will be played by glue, which conducts electricity well; it can be applied with a brush, being careful;
• after repairing the damage, you need to give time for the glue or special mixture to harden; you can use a hairdryer to speed up this process;

• after the conductive strip has dried, you must carefully remove the self-adhesive tape; to do this, it is best to cut it with a knife at the junction of the thread being repaired, so as not to damage it when removing the tape;

• After the work has been completed, you need to check the functionality of the OZS by starting the car engine and pressing the OZS power button.

See also video on the topic:

Method number 2

This method involves the use of non-ferrous metal shavings as a conductive element. Also, to repair the thread, we will need a transparent varnish (it is advisable to use a thick one, like for nails).

Mix the shavings with a brush and apply to a strip previously sealed with tape, as in the previous case. After an hour, the varnish will completely dry. The method is quite old. It is not always possible to connect damaged contacts as needed. Therefore, if it is possible to buy conductive glue, it is better to use the first method. It will be much faster, easier and more reliable. The cost of a 10-gram tube with this composition is 78 rubles. This volume is more than enough to repair several damaged heating threads.

Source

Repair work

The filament can literally be “painted” using conductive varnish or a special repair kit.

If this does not help, you may need to install a new relay.

It is located either in the standard relay box or in the passenger compartment fuse box. Installation is simple: take out the old one, put in the new one. But before this procedure, you must disconnect the battery!

The collection contains all the necessary documentation for the electrical equipment of the VAZ-2110, the circuit itself, the seat heating system, headlight cleaner, electronic engine control module and fuse box. Diagrams for other models can be viewed here. Below is a high-quality color diagram of the electrical equipment of the domestic VAZ-2110 passenger car.