The central lock does not work. The central locking of the vase does not work. Failure of the control unit

The system, which everyone calls the central lock, is not installed on all VAZ-2110 cars, but only on some of them. The purpose of this system is to simultaneously block the locks of four doors, when the driver, using the lock key, closes the left front door of his "tens". A similar picture occurs when the driver's door lock button is pressed from the passenger compartment.

There are several problems associated with the operation of the central lock on the "dozens". Firstly, the driver must be aware that in no case should a long or frequent impulse be given to control the opening or closing of the doors, as this can lead to failure of the activators that actuate the lock. They are located in each door of the VAZ-2110 car. With a long pulse, the activator motor collector heats up so much that the plastic brush holder melts and jams it. In this case, the activator will need to be replaced.

Second problem connected to the fuse that protects the electrical circuit of the central lock, because if it fails, troubleshooting usually begins with checking the integrity of this fuse. It is located in an inconvenient place, behind the fuse box in the passenger compartment. There it is very difficult to find it among the wiring harnesses, and it is tied to them with the help of electrical tape. It stands in a pink wire break and is enclosed in a plastic cup.

Another problem, on which the central lock refuses to work, is a plug connector, which is located under the carpet at the location of the driver's feet. Over time, moisture accumulates there and oxidation of the contacts occurs, due to which power is lost on the activator.

It is also possible failure of the module control unit a central lock, in which, using two relays, voltage is supplied to the activators to open or close the door locks. You can check its serviceability by applying voltage from the battery to the contacts of the module connector (white, eight pins), to which the red or yellow wire is connected. If the locks work, then the module is faulty.

The comfort of modern cars is impressive, and every year the quality of comfort options improves, and the list is replenished with more and more new "chips". However, along with additional amenities, car owners often get a lot of trouble from an overabundance of electronics and "too smart" systems.

Against the background of ultramodern and newfangled systems, the central lock looks somewhat archaic and primitive, since this assistant appeared quite a long time ago and today you will not surprise anyone with its presence. However, despite the simplicity of its design, which, against the background of today's electronics, seems just some kind of medieval one, the central lock (CL) often fails, which causes a lot of trouble to its owner.

Over the many years of its existence, the central lock has seriously evolved, as well as the central lock control system.

The central lock guards the safety of the car and protects the vehicle from unauthorized entry into the interior of outsiders. In addition, the central locking system is very convenient, because it allows you to close all the doors of the car at once, including the trunk, with one movement. Initially, closing was done by turning the key in the keyhole in one of the doors. However, over time, even this seemingly easy and simple movement was replaced by an even simpler one, now in order to activate the central locking, the driver does not need to insert the key at all, moreover, he does not need to approach the car. Closing and opening of all doors is carried out using a special key fob remote control, which activates and deactivates the central lock using a coded signal. This signal is encrypted and only the control unit and the key recognize it, the connection between the key and the unit is carried out "over the air".

Learn more about the central locking device

The central lock consists of:

• control unit;
• Input sensors (microswitches);
• executive devices.

The control unit is a brain center that manages signals, sends commands to executive devices and analyzes the operation of the system. The unit processes the encrypted signal, after which it decides whether it is possible to close or open the doors and other elements that are under the control of the central lock (glass, sunroof, trunk, hood, etc.).

Input sensors or microswitches, as they are also called, are paired with limit switches (limit switches) of door locks. After the control unit "permitted" to open or close the door, the microswitches fix the position of the locks.

Actuators are locking devices, in other words, door locks. The opening of the locks occurs by activating the microswitches, which in turn received a command from the "brains" of the central lock. Thus locks are the last link in this whole chain.

It should be noted that the central locking is not connected to the motor, unlike the car alarm, which will not allow the engine to start if the lock is not released. If a remote control is used in the central locking system, it is powered by a battery.

Malfunctions of the central lock

Failure of any system can occur suddenly, but often future breakdowns can be prevented by a number of small failures that are harbingers of serious problems.

Among these reasons are:

• Lock malfunctions . When the locks open with difficulty or not the first time. Arbitrary closing and opening of locks. Blocking locks, refusal to react and any commands. In such cases, it is often necessary to break the glass if there are no additional keys or the car does not respond to the key. If you cannot open the door from the inside, you can try to disassemble the door card.
• Partial failure . Locks and working mechanisms periodically fail and stop working normally. There may be interruptions during signal reception.
• Complete failure of the central lock . Complete incapacity of the central locking system, in which the central lock does not respond to either the button or the key, the unit does not accept or does not understand the commands coming from the key. Often the reason is rather banal - a "dead" key fob battery, which does not allow you to send a signal or leads to the fact that this happens incorrectly.

The central lock does not work - we are looking for a reason!

CZ + alarm testing

Quite often, the central lock is supplemented with an alarm system, so at the first sign of incorrect operation, you should check the “signal”, often it is the cause of all the trouble. If the locks do not work "from the key fob" try to close them with a key, that is, by placing the key in the keyhole.

If the central lock does not work only "from the key fob", while everything opens with the key, you should check the battery, as well as other control circuits of the alarm.

The central lock does not close and does not open, it does not work completely

If during the test the central lock does not work correctly or is unstable both in manual and remote modes, it is necessary to clarify some nuances in order to make a "verdict". For example, where the failure occurred, whether any clicks are heard, whether the door lock buttons move when trying to lock the doors. You should check the central locking fuse, as well as other electrical circuits that may be involved in this.

Fuses are OK, but the central locking does not work

If the fuses are OK, but you still do not know why the central locking does not work, you should continue the diagnosis in order to understand what is the reason.

But the point may actually lie in the locking devices, which could simply fail due to the lack of voltage on the driver's door activators. This happens due to poor contact, oxidation of the terminals, and also in the event of a wire break. In this case, the driver's door actuator cannot send the incoming signal that goes from the remote control to the other doors of the vehicle. This phenomenon occurs when the driver's door activator limit switch is faulty. The control signal is not detected.

Repair of the central lock should begin with the diagnosis of the power supply, as well as the control signal. A visual inspection of the system wiring is required for poor contact or breaks. It is also mandatory to check the switch limit switch installed inside the drive.

Central locking malfunctions: spontaneous locking or unlocking of doors

A frequent occurrence when, after blocking the door locks of the central lock "from the button", after some time they spontaneously open. That is, the opening occurs even without a signal from the remote control. The reason for this phenomenon may be incorrect fixation of the fasteners of the rod, which is located between the drive and the driver's door lock mechanism. Thus, there is a violation of the opening and closing of doors.

Possible malfunctions of the vacuum central lock

During the period of intense precipitation, as well as when the air temperature drops, there are interruptions in the operation of the central locking pump. The reason, as a rule, lies in the appearance of condensate, which occurs during a sharp temperature drop. There is a malfunction of the driver's door actuator switch contact. The solution to this situation is as follows, the switch is dismantled, condensate is removed and the working surfaces are lubricated. In some cases, it is necessary to completely change the mechanism.

The door locks are activated asynchronously, that is, not simultaneously.

Sometimes, on some doors, the locking mechanisms do not work in the same way or do not work at all, this may happen with some delay or not at all, as a result, the doors continue to remain open, even after the remote control has given the command to block the doors. In this case, the compressor can continue its work until the protection system turns it off. In such cases, the tightness of the connections of the vacuum tubes of the line is checked, as well as the inspection of the door line, on which a similar phenomenon is observed. The search for damage is carried out by visual signs, as well as by ear, by the characteristic hiss of the bleed air. If damaged areas are found, repair or complete replacement should be carried out.

Damaged electrical wire in the door corrugation

Signals are sent to the pump control board, but it still continues to work, ignoring these commands. Such breakdowns require disassembly of the compressor unit, followed by cleaning of the oxidized terminals of the pneumatic sensor of the alarm system. If, after the measures taken, the situation has not changed, it can be assumed that the pump control board has failed.

Car central lock repair

From the foregoing, we can conclude that electric central locking is very sensitive to temperature changes and wet weather, as well as to interruptions in the car's electrical circuit. At first, this manifests itself in "braking", untimely operation, as well as periodic failures. Daily operation of the central lock one way or another leads to wear of working parts and gears, as well as the drive itself. Plastic mechanisms wear out due to stress, as well as the lack of proper lubrication. Prevention of the operation of the central lock allows you to prevent serious breakdowns, as well as extend the life of the entire system as a whole. In addition, a serviceable central lock and alarm eliminate the likelihood of unpleasant situations when you find yourself face to face in the middle of a deserted highway with your unauthorized blocked.

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Central locking is a simple and reliable means of enabling the automatic locking of car doors. It also helps control windows, trunk or sunroof. One of its popular functions is to lock the doors when the car is moving, which eliminates the possibility of accidental opening at high speed. As a rule, the central lock is installed already at the factory, although there are many cars where it is installed independently.

The main elements of this system are quite simple and do not require special maintenance. However, problems with the lock are not so rare. A complaint that the central lock does not always work can be heard from every second car owner. This situation is not a pleasant one, because if the central lock does not open from the key fob, it becomes extremely difficult to get into the car interior. If there are problems with locking, the car becomes defenseless against thieves.

Central lock and frost

If the central lock stops working, there can be many reasons, but in most cases only one or two drives fail or there are temporary difficulties with closing / opening doors. One of the common problems is the operation of a car with a central lock in the winter. . If the problem is noted only in frost, this means that there is no lubrication in the electric lock, and the water that gets into it freezes, preventing normal movement. To fix this problem, you will need to dismantle the door trim, clean and re-lubricate the lock. As a rule, with such a violation, the central lock on one door does not work.

Another reason why the central lock does not work may be the very design of the activators placed in the doors. If solenoids act in their role, then a year of operation is enough for them to seize during operation. This problem is especially pronounced in the cold season. At the same time, such central locks are installed on domestic cars at the factory, and in order to avoid problems, solenoids can be independently replaced with activators with electric motors.

If the CC does not work

There are plenty of situations when the central lock does not work when it is controlled remotely or with a key. Quite often, car owners are faced with the fact that the central locking from the alarm does not work. If the central lock works in a “complex” with an alarm, it can be difficult to deal with such a difficulty, especially if the alarm itself is working properly and responds adequately to signals from the key fob. In this case, the cause is often a faulty relay or a wiring problem. By the way, the relay itself can be located not only next to the control unit - if the central lock was installed by the previous owner, then you will have to look for it.

When the central lock does not work from the key fob, but works fine from the key or from the button, it is almost guaranteed that the key fob itself is to blame- the battery can simply sit down in it. Problems with the transmitter or receiver of the radio signal are rare. If the central locking from the key fob does not work, you can try using the second key fob from the kit, or replace the battery.

If the central lock does not work from the key, then the reason may be the activator located in the driver's door - it is the main one and distributes the control signal throughout the rest of the system. You should check the power wires leading to it - often they are the cause. But before that, it makes sense to check the condition of the fuses of the entire system. To check the power supply of the activator, you will need to remove the trim from the door.

Other problems with the central lock and self-checking the system

In the case when the lock was installed at the factory, for the time being it worked flawlessly, but suddenly a failure occurred, you will have to check the entire system. You can do this yourself, for which you will have to check almost all possible options - from fuses to the operability of the final actuators.

Checking the fuses

For any problems, the check should begin with the fuse box - often one of them becomes the culprit. If a fuse systematically blows on one circuit, it must be checked especially carefully, especially the condition of the activator - perhaps it is he who causes the short circuit. How to look for fuses can be seen in the video:

Wiring check

Attention! When the central lock does not work, checking the wiring is, although time-consuming, but necessary.

It should start from the door entry points, because it is in these places that the wires often break off or short out due to insulation wear. The supply of electricity should also be checked. To do this, the wires are disconnected from the activator, and the “closed” mode is activated by the remote control. Voltage should appear on the power wire. When you press the button that opens the lock, power should be supplied to another wire. In this way, each activator is tested.

Checking actuators

When the central lock does not open one door or there are periodic failures in operation, the cause may be the activator itself. If it works on the basis of an electric motor, under certain conditions, its winding may burn out or the gear that provides the translational movement of the rod may wear out. Repair of this part is impractical, it is easier and faster to install a new activator.

Advice! Often there is such a situation when, after removing the battery, the central lock does not work. It should be understood that this system does not work without a battery, and it is highly undesirable to de-energize it. This can lead to a malfunction of the control unit and the need for its subsequent repair or replacement.

If the central lock (CL) does not work, then the driver cannot get inside the car. The article discusses the main types of malfunctions, how to open the doors in case of malfunctions, and also provides recommendations for the repair of vacuum and electric central locking.

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Fault types

The central lock installed on cars has the same principle of operation and a similar connection scheme. Before starting repairs, you should find out how to turn off the central lock and diagnose the equipment.

If an alarm is installed on the car, then the central lock is controlled using a remote control - a key fob. When the keys are pressed, a signal is sent to the control unit and the functions are adjusted. A triggered central lock opens the door.

The central locking system includes switches, connecting wires and electric or vacuum type drives as common elements. Drives are activators. A central drive is installed in the front doors, when activated, electrical signals are sent to close or open the remaining doors.

Causes of malfunctions

If the central locking stops working, you must first check the fuse box. Short circuits and various violations often occur in the central locking system, which leads to blown fuses.

The central lock does not work when the battery is completely discharged. To check, you need to open the central lock with the key and try to start the car. If it does not start, then the reason is the discharge of the battery.

The reason why the central lock does not work may be in the breakdown of the electronics. You can open the car without a key from the key fob. If the central locking does not open from the key fob, check the batteries and the key fob buttons. They can stick and not work at the right time.

At the next stage, using the instructions, you should check the alarm control unit. It is possible that due to a malfunction in it, the central lock works, but does not close all the doors. Lastly, the microboard is checked, which is located on the activator motor, at the same time the drive itself should be checked. Defective parts must be replaced.

Electric circuit for connecting the central lock

If the central lock does not work, this may be due to mechanical problems: the larva drive hose is faulty. The signal from the key fob received by the control unit is transmitted to the motor on the doors, which should work and act on the hose fixed in the larva. If one end of the hose falls out of the cylinder, the drive is disabled. In this case, the door will not be able to open or close. Thus, the reasons why the lock does not work or the operation malfunctions can be both electrical and mechanical.

Repair of partial failures of the vacuum central lock

In many cases, malfunctions of the central lock are accompanied by prolonged operation of the pump. It does not stop working until it is disabled by protection.

In this case:

1. The central lock opens and closes the doors until the compressor turns off. In such a situation, the cause is a malfunction of the drive switch. Voltage is supplied to the pump board from the activator, when the positive is received, the doors open or close. The switch needs to be repaired or replaced with a new one.
2. The doors close and open, the central lock does not open only some of them, while the compressor continues to work until the protection works.

There can be several reasons for failures:

• the tightness of the vacuum line hoses is broken;
• signals to the compressor control board are received, but it does not respond to them;
• no signal is received from the limit switch for one of the doors to the pump control board, therefore, despite the fact that the doors are opened or closed, the compressor continues to work.

If the hoses are not tight, the entire line should be checked. Torn hoses are replaced whole. If the tubes are intact, the actuator may be leaking or the diaphragm may be cracked. Faulty parts are replaced with new ones or a new lock assembly is bought (the author of the video is AvtoMalyarka from Scratch).

In the second case, they check the entire electrical network from the activator to the control board, as well as the voltage on each wire. If an open circuit is found, it must be repaired.

The reason may be a malfunction of the compressor control unit. In this case, you need to disassemble it and carefully clean the terminal contacts. If this does not give positive results, then you need to check and repair the control board circuit.

Repair of electric central lock

CZ solenoids do not tolerate low temperatures over time due to high humidity, especially in spring and autumn. First they start to wedged, and then the door no longer closes and does not open. Solenoids can be cleaned and lubricated, but it is better to replace them with motorized actuators.

Activators may not work or work partially on one of several doors for the following reasons:

1. Damage to the circuit or poor quality contacts in the electrical wiring.
2. Relay defective.
3. If the control is carried out from the board, then it is possible that the reason is its malfunction.
4. Poor contact at the terminals of the devices or damage in the wiring diagram of the drive.
5. Depreciation of the components of the activator.
6. Winding burnt out.

Repair of the central lock of the car should begin with checking the non-working activators: whether voltage is applied to them. If the door closing function is activated, there should be voltage on one wire. If a signal is received to open, the voltage leaves the 1st wire and appears on the 2nd. Based on the results obtained, further actions are performed: either the activator is checked and repaired in case of a malfunction, or the entire circuit is checked, correcting the damaged sections. Breakage of wires is most often found in the corrugation.

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Video "Repair of central lock"

This video shows how to get rid of problems with the central locking of a car (the author of the video is Ksyu and Den. Live blog).

The central lock, or as it is briefly called “CL” is a necessary and necessary thing for any car, allowing the owner to open and close any door in the car with just one movement of the hand. However, it happens that this system ceases to function completely, or some of its parts do not work properly.

There are reasons why one or another part of the central lock may fail, and we will describe each in detail below.

The central lock does not work: symptoms and causes of their occurrence

It happens that during the closing of the central lock located on the driver's door, no action occurs on the other doors. However, it is worth moving it a little, as the doors immediately closed. It is immediately clear that the point here is the presence of malfunctions in the central lock and some reasons contribute to this.

Among all the possible causes of malfunctions, all the most basic ones can be distinguished.

No contact in drive

With such a fault, the contacts inside the control actuator do not close the necessary contacts in time. This happens for several reasons:

When such problems occur in the operation of the central lock, first of all, you need to make sure that the button is lowered to the very end. If for some reason this does not happen, first inspect the skin for scoring, and then, inspect the rod for its even and accurate position.

Blown fuse

If manipulations with the central lock rod do not bring any results, and they do not react in any way to either opening or locking, then first of all it is necessary to check its electrical circuit, and specifically the fuse. Because on the central lock it can fail not only if a short circuit occurs in the circuit, but also from the slightest overload.

The fuse of the central lock is indicated by a marker.

Overload occurs most often from insufficient position of the rods, as well as lubrication in them during the winter operation of the car.

Broken central locking wires

A wire break is not the main, but one of the reasons for the failure of the central lock. The main reason for this is the break in the wires in those places where they have the greatest load. Such a place is certainly the passage of the corrugations from the side of the rack and the driver's door. And since it is the driver's door that is most often opened in any car, it is she who gets most of the load.

• It is quite easy to identify such a malfunction, you just need to release one of the ends of the corrugation, in which the wires pass into the door and pull one of the five wires of the central lock. As a rule, they are connected in one bundle, or go next to each other.
• After carrying out such manipulations, a wire that is torn or broken will easily give in among the general pile.
• If you are sure that a particular circuit is malfunctioning, it will not be difficult to replace it by inserting the desired wire and further insulating it with electrical tape.
• When the wires are broken or torn in other places, a malfunction can only be found by ringing the circuit with a multimeter.

Block burned out

Another reason for the possible failure of the central lock is the burnout of the central lock block. And in order to diagnose it, you need to use the above-mentioned multimeter and determine the presence of voltage at the contacts of the unit.

This is how the immobilizer and the central locking unit look behind the instrument panel.

Please note that during diagnostics, it is necessary to act on the lock in the driver's door so that impulses are sent from it to the main unit.

Central locking actuator defective

And the last reason why the central lock refuses to work will be the failure of the activator on the central drive. It can fail both for mechanical reasons, due to the wear of rubbing parts, and due to the influence of external factors of moisture and corrosion on it.

In the event of a breakdown of the activator itself, it is required to replace the electric drive with a new one and replace it. Pay attention to the fact that the drive must have five wires of different colors.

The principle of operation of the central lock on the VAZ-2112

The central lock, which is powered by the driver's door drive VAZ-2112, works as follows:

When the lock is closed, the rod on the driver's door goes down, thereby closing certain contacts on the electric drive. From these actions, the central locking unit receives signals, and transmits commands to the drives of all other door locks. The same is true of their discovery.