Why does the central locking constantly block the driver's door? How to determine the cause of a central locking malfunction. Why doesn't the central locking work? Relay failure
On the VAZ-2114 it is an excellent device with which you can open or close all the doors of the vehicle with a single movement. Over time, a situation arises when the car stops locking using the central locking or the locking occurs only once. In this case, we can judge that the device has failed.
Causes of malfunction
There are many reasons why the central locking on a VAZ-2114 stops working stably. All existing causes of malfunction can be divided into two subgroups: climatic effects and technical breakdown. In the first case, the lock begins to work unstably due to the influence of climate, that is, due to very low temperatures, as a result of which not only the lock, but also other systems may freeze.
Or, as a result of heavy rains, water got into the central locking of the VAZ-2114. Among the technical reasons, we should note incorrect installation of the device on the car or incorrect configuration of its operation. But sometimes the device does not work due to prolonged use, which leads to natural wear and tear of some elements. The problem may also be the use of low-quality devices.
Principle of operation
How is the central locking system controlled on the VAZ-2114? The algorithm of the central locking operation is that a control pulse arrives at a certain point, as a result of which one relay with power contacts is activated. In one case the car is locked, in the other - vice versa. Central locking activators are connected to relay contact 30, and through closed contact 87, ground acts on both outputs of the activator. If one or another relay is triggered, then contact 30 will be connected to the positive, and as a result, temporary voltage will be supplied to the activator, which will set the rod in motion, which will either open or close the door.
Taking into account the fact that all activators are connected to the central locking system in parallel, one action will be the same for all doors. The locks installed on cars can be electric or pneumatic. The electric central locking system consists of mechanisms with a single motor, the second, in turn, includes a compressor, tubes and a control panel.
Experts' opinions
Many experts who have encountered the problem that the central locking on a VAZ-2114 does not work argue that all problems with the device should be divided into certain categories. Below we will look at each of them.
- Complete device failure.
- Partial lock failure.
- Operation malfunctions due to mechanical, electrical or other defects.
If a problem occurs with the central locking, the car owner must independently determine which of the above categories the breakdown falls into. Therefore, repairing a fault should not begin with disassembling a particular unit - it is enough to conduct a thorough diagnosis of the equipment. Thanks to the diagnostics carried out, the car owner will not only reduce the time spent searching and solving the problem, but will also reduce the monetary costs of repairs.
Firstly, the central door lock on the VAZ-2114 works regardless of the engine or ignition. The main thing for the central locker is the presence of a working on-board network. The serviceability of the BS lies in the correct connection of the vehicle's power terminals to the battery. Experts say that the simplest reason for the malfunction is that the walls of the door tongues are too thick, which cannot move freely through the trim. As a result, the activator is simply unable to close the doors, and at the same time reproduces clicks of completed work. You can check it in a simple way - just unscrew the locks from the doors and close the car. If all the doors close once, you will have to buy new clamps with a smaller outer diameter.
Diagnosis of alarm malfunction
The central locking control activator is installed in the driver's door. As soon as this drive is activated, a signal is sent through the channels of the circuit between the remaining activators, according to which the desired action occurs. If an alarm system is installed on the car, the performance check should begin with it. To do this, you need to check the closure both with the key and with the key fob. If the car closes completely from the first, but not from the second, then the problem lies in the electrical alarm circuit or in the control circuit. It happens that the simplest reason for the car not being locked with the key fob is the weak charge used in the battery.
It happens that even with the manual method the central locking does not work. If a vacuum central locking system is used, then during manual testing there will be no sound of the compressor running. With electric central locking, you will hear characteristic clicks produced by the relay. However, the buttons on all doors will remain in the same position. Most often, domestic cars use electrical central locking systems. In such cases, the VAZ-2114 central locking fuse has probably failed. Depending on the connection circuit used, more than one fuse may need to be replaced. This repair can quickly end.
Fuse burned out
It may happen that the replaced element quickly burns out. When using central locking, the fuse may burn out due to a short circuit or overload. The latter occurs when carrying out any actions on frozen locks using a key fob, and not by manually opening the doors.
If it’s warm outside and frozen locks or frozen grease are out of the question, then the problem lies in a short circuit. In case of a short circuit, you need to look for the cause; the reason may be a broken wire or a poor connection due to oxidized contacts. In this case, the fuse remains intact, but the signal is not transmitted due to the absence of a control circuit. The activator limit switch may also be broken.
Repairing broken wires
As a rule, most often the wires break off or break in the corrugation of the door. This is due to the fact that the door is constantly opening or closing, and the wire insulation is quite thin. To eliminate the problem of broken wires from the rubber corrugation of the door, you need to slowly pull out one wire at a time that approaches or departs from the central locking unit for power or control. A broken wire can easily be pulled out of the total mass. You can connect the break using a simple connection using male-female terminals. If the break occurs in another place, it is necessary to test all wiring with a multimeter. When checking, it is worth remembering that voltage will be present on one wire only at the moment of opening, and on the other - when closing the central lock.
The VAZ-2114 central locking unit burned out
One of the reasons for the breakdown may be a malfunction of the central locking unit. To carry out the necessary diagnostics, just use a multimeter and check the voltage of the contacts that connect the activators of the remaining doors.
When checking the remaining doors, the main drive (the one installed on the driver's door) must be unlocked or locked. Simply put, apply current to the contacts of the block. What to do if the central lock on a VAZ-2114 fails? In this case, it must be replaced with a new one. But it can be restored.
Repair of electric central locking
The central locking system on a VAZ-2114 of this type begins to work intermittently after a while. They will be associated with temperature fluctuations. Most often, unstable operation of an electric central locking system will be observed at low temperatures or high air humidity, that is, in the autumn-winter period. At first, the mechanisms will jam slightly, then opening or closing will not occur at all. Most often, this problem occurs on domestic cars with pre-installed central locking from the manufacturer. It is better to replace locks with solenoids installed at the factory with central locking systems with motors, which will be more reliable.
If the drive of one door does not work, you should check the circuit to that door. If there is no open circuit, then the problem may lie in a malfunction of the switching relay or a breakdown of the activator control board. Sometimes the solenoid or motor winding may burn out, or the drive gear may wear out. In this case, it may be necessary to replace the auxiliary drive of the central locking door.
Central locking drive failure
If all the wiring is in good condition, then it also happens that the main activator, which closes the central locking on the VAZ-2114, breaks down. To solve the problem, just purchase a new main door activator. Just remember that you should buy a lock drive that has 5 wires, not 2. Since the five-wire one is installed on the control door, and the two-wire one is installed only on the controlled part.
So, we have looked at the main malfunctions that occur with the central locking on domestic Samara-2 cars.
When leaving the conveyor, its comfort and ergonomics are increased. The cars are “stuffed” with electronic safety and comfort systems. They provide maximum driving pleasure.
Car central locking easy to use and useful invention. Used over the past few decades. Its creation allowed the driver to get rid of unnecessary manipulations associated with opening and closing the driver's and passenger doors.
Since its inception, the central car lock has undergone a number of significant changes. Controls the opening of not only the doors, but also the trunk. The car's central locking cannot operate indefinitely. Sooner or later, malfunctions occur in its operation requiring repair or complete replacement of the system.
A person who gets used to good things is sensitive to the failure of comfort systems. He feels uncomfortable wasting time on manipulations that previously required just a finger press. A central locking malfunction forces the driver to search for information, why the central locking doesn't work.
At the end of the article you can find a video on how to repair a car's central locking system. It will be an excellent addition to the text material. Enjoy watching.
The car's central locking is the “heart” of the security system. Responsible for control in the car. That is why it is called central. The signal sent from the key fob symbolizing the central control unit closes or opens the doors, windows, trunk and hatch.
Central locking is one of the car's auxiliary comfort systems. The development of the central locking system does not stand still. New car models are equipped with a system that ensures automatic closing of door locks when driving. Some car models combine central locking and alarm systems under a single control.
Central locking device
The central locking system is designed to ensure reliable operation under all conditions. It combines several basic elements, without which full use of the system is impossible. New cars have a complex central locking control system. Other components of the vehicle’s on-board system are involved.
The device of the central car lock:
1. Control unit.
The electronic control unit is used to transmit signals with commands to the mechanism switches and the central unit. After decoding the command, the central unit opens or closes the doors, windows, trunk and hatch.
2.Input sensors.
Input sensors are also called microswitches. Work together with door lock limit switches. Microswitches determine and fix the position of the locks after a command from the central control unit.
3.Executive devices.
Actuators are represented by door and trunk locks. They open and close based on microswitch commands. The last link in the chain.
The central locking system operates independently of. The electronic control unit on the key fob is powered autonomously. A coin-cell battery is used.
Determining malfunctions of the central locking
Failure of the central locking system cannot occur spontaneously. There are harbingers indicating that the system is not working correctly or malfunctioning. They cannot be ignored. It is necessary to determine the cause of the malfunction as quickly as possible.
Reasons for failure of the car's central locking system:
1. Complete refusal.
Does not respond to pressing buttons on the key fob sending commands to the central control unit. Often the cause of the malfunction is trivial. A discharged key fob battery prevents sending a command to open or close locking devices.
2. Partial refusal.
It is characterized by alternating periods of normal operation in normal mode and a complete refusal to respond to remote control commands.
3. Malfunction of locks.
The malfunction manifests itself as chaotic operation of the locks. They can randomly close, open or be completely blocked without responding to incoming commands. The malfunction is dangerous because the doors can be completely blocked without the possibility of mechanical opening. You have to remove the door trim and open it manually.
Before you start central locking system repair it is necessary to establish the cause of the malfunction.
The procedure for localizing failures and disturbances in the system:
1. Alarm testing.
If the central locking is combined with an alarm system, it is necessary to inspect it first. The door locking devices do not respond to signals from the control panel; they must be checked mechanically using the ignition key.
If the central locking operates in manual mode, you need to check the electrical and control circuits of the alarm. One of the common options is that the battery in the key fob may have run out.
2. The central locking does not work completely or partially.
When testing the central locking system, it refuses to work or operates irregularly in manual mechanical mode using the ignition key. It is necessary to clarify the nature of the manifestation of the malfunction.
If there is a complete system failure on the vacuum central locking system, the compressor operation cannot be heard. The electric central locking responds with weak, barely audible clicks of the operating relay. The locking device buttons remain stationary.
It is necessary to locate the central locking circuit fuse. If it is burnt out, replacing it will solve the problem of mechanism failure. Depending on the car model, there may be more than one fuse.
3. The system fuses are intact and undamaged.
If it is determined that the fuses are safe and sound, you must continue to persistently examine the system to determine the cause of the malfunction.
The cause of malfunctions in the operation of locking devices may be the lack of voltage supply to the input elements of the driver's door actuators. The malfunction occurs after wire breaks or terminal oxidation and breaks contact.
The driver's door drive cannot transmit the signal received by it from the control panel to the other doors. Similar symptoms appear when the driver's door actuator limit switch is faulty. The control signal is not detected.
Repair work on the central system must begin with checking the power supply and control signal. It is necessary to visually check the system wires for damage. The limit switch must be checked. It is installed inside the drive.
4. Arbitrary opening or closing of door locks.
Often, after pressing the key fob button, they close and after a few seconds open randomly. The opposite sign of a malfunction also appears when the locks close without giving a signal.
The cause of the malfunction is a violation of the fixation of the rod fasteners. Located between the drive and the driver's door lock mechanism. There is a violation of the process of unlocking and locking doors.
Repair of vacuum central locking
Common malfunctions of vacuum central locking:
1.Opening and closing of door locks continues until the pump stops working.
The cause of the malfunction is condensation formed during temperature changes. The driver's door actuator switch contact malfunctions. The switch is dismantled and the condensate is removed. It may need to be replaced.
2. Uneven operation of car door locks.
On some doors, the locks close late or continue to remain open after receiving a command from the control panel. The compressor continues to operate until it is switched off by the protection system.
The vacuum line tubes are checked for leaks. The door line where the fault was found is inspected. Damage can be detected by hearing by the characteristic hiss of escaping air. Damaged tubes require replacement.
The pump control board does not receive a signal to close the door locks. He continues to circulate air. Damage to the electrical wire occurs in the door corrugation.
The signals reach the pump board, but it continues to work ignoring them. To repair the fault, the compressor unit is disassembled. The oxidized terminals of the alarm pneumatic sensor are being cleaned. If these steps do not help, then the pump control board has failed.
Repair of electric central locking
Electric central locks on cars are sensitive to temperature changes and high air humidity. At first they start to freeze and after a short time they refuse to work.
Causes of malfunction of the electrical central locking system:
1.Breakage of electrical circuit wires.
Careless actions when dismantling doors or repairing them lead to a break in the electrical wire in the corrugations. It is necessary to “ring” the electrical circuit to find damage.
2. Relay failure.
The damaged relay is replaced and the system operates as before.
3. Malfunctions of the control board.
It is being repaired or replaced.
4. Wear of motor gears.
Active use of the central locking system leads to wear and tear on the working elements of the motor. Plastic gears suffer. They wear out as a result of work. They are being replaced.
The central locking system in a car is a useful and convenient feature for the driver. To repair it, you need to understand the structure and principle of operation.
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The central locking VAZ 2114 (hereinafter referred to as CZ) is a mechanism that ensures the simultaneous closing or opening of all four doors in the car. This option is very convenient; it eliminates the need to reach out and lock the doors manually every time. Such centralized control comes in handy when installing car alarm systems, which significantly expands the possibilities and variations of the use of the locking mechanism.
The operation of the lock itself does not depend on whether the car engine is running or the fact that the ignition is turned on. Power is supplied directly from the battery.
It is quite common for the system to malfunction. For example, when the locks of some doors close, but the rest do not. Or the closing process occurs with great difficulty, jamming, or partial failure of the latches. A situation familiar to many car enthusiasts, isn’t it? There are several reasons for the node to not work correctly; we will look at them in more detail.
7 common faults
Why does the central locking of the VAZ 2114 not work, you ask?
Most often, interruptions occur due to temperature changes and humid weather. The first signs are unclear operation of the lock, jamming or incomplete operation.
Below we list the top major breakdowns:
Central locking diagram for VAZ 2114
The system consists of the following components:
- mounting block;
- 8 amp fuse;
- 4 gearmotors (one in each door, and the one in the driver's door has a contact group);
- central locking control unit;
- wires (red, black, blue, yellow) and plugs;
- rods that are located in each door;
- limit switches that signal the current state of the door (open or closed).
Where is the central locking of the VAZ 2114
The central locking system is located in the driver's door, just like the electric drive. If we talk about the system as a whole, it is distributed over 4 doors (in some cases it also extends to the trunk), and the central panel (control unit).
Testing and diagnostics
If your car is equipped with one of the alarm systems, then it is better to start diagnostic activities with it.
You should check the operation of the central locking when using the key fob, and when opening and locking with a key. If, during a manual check, the central locking system works correctly, then the reason is the alarm.
Additionally, it would be a good idea to check the battery charge level, since if it is insufficient, interruptions in the operation of many electrical consumers occur.
In general, it is best to check, as they say, along the path of least resistance. That is, diagnose something that does not require significant effort. And if the fault cannot be identified, resort to disassembling the driver's door and examining the mechanisms along with the electronics.
conclusions
In this article, we touched upon only some of the most common problems associated with the operation, repair and maintenance of a centralized lock. Despite the fact that the node has plenty of problems, restoring its functionality is not a difficult, much less an impossible task. Usually, to achieve smooth, efficient operation of the system, only practical skills are missing. After receiving them, you will be able to repair any complexity! If you want to install the central locking on a VAZ 2114 yourself, then here is a video instruction:
Perhaps this information will be useful. By the way, this problem is familiar not only to Toyota car owners. So.Everything is fine with the rods, but the door does not respond to the central locking. It feels like the electric drive doesn't have enough power. In my case it was exactly like that.
The electric door lock motor is to blame. This motor is located in the plastic housing of the electric drive mechanism. The body is collapsible. Opens with a wide flat screwdriver. Now we take out the motor itself and disassemble it. Now you can see that one contact is connected directly, and the second through a small plate. This plate is a self-resetting fuse. The fact is that a fairly strong spring is installed in the electric drive mechanism, which returns the lock tongue to its original position. And the motor must be powerful enough to compress it. In order, apparently, to prevent the motor from burning out, this fuse is installed. It works as follows: when current passes through it, it heats up and increases resistance. As it cools down, the resistance is restored. Heating and cooling occurs in less than a second. Therefore, if you test the motor by simply connecting 12V to it, you will see how it spins with a noticeable slowdown. Over time, this fuse (maybe from overheating, maybe from something else) loses its recovery properties and greatly increases the resistance. Therefore, when passing the test described above, you can see how sluggishly the motor with the damaged fuse rotates and after one and a half seconds it stops altogether. Naturally, this force is not enough to overcome the force of the spring to open/close the door lock. So, the direct culprit has been discovered.
However, replacing this fuse is not a very easy task (I never succeeded). The variety of such fuses, depending on the characteristics, is very large, and their presence in radio and electrical goods is extremely negligible. I also couldn’t replace the entire motor - it’s a different shape and doesn’t fit into the body (I really didn’t want to cut the body), it dangles and falls off, it’s not powerful enough, etc. and so on. It is not difficult to change the entire mechanism. The question price on the existential is 1500 rubles. But this method has been postponed as the most extreme and expensive.
Having once again tested the pulse during which current is supplied to the electric drive of the lock when the central lock is activated, and it also lasts less than a second, it was decided that nothing would happen to this motor in a split second (the main thing is to open and close the locks without fanaticism). After consulting with electronics engineers, the answer was received that nothing bad would happen with the electronic control of the central locking in such a short period of time. So, as you understand, it was decided to short-circuit the second contact. Those. the plate (self-resetting fuse) was removed, wrapped in foil and inserted into place. The tests showed not bad results. Not bad - because when the motor was running, a little smoke came out of it, but the motor did not heat up, and the cranking force was enough to compress the spring.
Then we carefully assemble everything, and preferably in such a way that there are no unnecessary parts left ;). It is not enough just to snap the plastic body of the mechanism into place; it needs to be glued. Otherwise, the case will crumble in the closed door, and it will be very, very difficult to open it.
Now we very carefully install the mechanism in the door, carefully monitoring all the details and rods of the mechanism (don’t forget to connect everything, tuck it in, slide it in, tighten it, etc.) That’s it! Your car is ready for full use.
Good luck on the roads of our vast homeland and thanks to the Internet for everything!
Attention: Using the tips I have posted here, you do so at your own peril and risk! I confirm that everything has been working for me for a month now, and I hope it will continue to work, ugh x 3.
Central locking makes life easier for the driver by locking and unlocking all the car doors at once. That is why failures in its operation are perceived so painfully by the owner.
Operating principle and design of central locking
When you turn the key in the driver's door lock, a microswitch is activated, sending a signal first to the door control unit, and then to the central unit, from where control signals are sent to the control units of the remaining doors (trunk lid and fuel hatch).
The door lock actuator (actuator), having received a signal from the door control unit, turns on the electric motor with the gearbox. The rotational movement of the electric motor is converted into a reciprocating movement of the lock rod.
Thus, when you open the driver's door with the key, the locks of all other doors of the car are unlocked. When you lock the driver's door with the key, everything happens exactly the opposite.
If there is a special button on the ignition key, unlocking and locking the car doors can be done remotely.
The undeniable convenience of central locking is that simultaneously with remote locking/unlocking of door locks, the car alarm is activated/deactivated.
By the way, the central lock is perfectly compatible with.
Failure of the control panel
If the central locking does not respond to pressing the button on the alarm control key fob, try closing the driver's side door with the key.
If the central locking works, the cause of the malfunction is the portable remote control.
The battery in it may simply run out, but the electronic module of the device may also fail.
Fuse blown
Start troubleshooting the central locking by checking the functionality of the fuse through which the device is connected to the power circuit.
There are only two reasons for burnout: short circuit and circuit overload. In the first case, look for the cause of the short circuit in the electrical wiring.
In the second case, the cause of overloads is usually increased current consumption by the motor of one of the actuators.
The “appetite” of the actuator motor increases if, due to or incorrect adjustment of the thrust, the force required to lock or unlock the lock increases.
To find the culprit of the overloads, disconnect each of the actuators from the connectors one by one.
Circuit break
If the integrity of the wires is violated, the central lock either shows no signs of life at all, or works unstably, intermittently.
Most often, wires break in places where they are constantly bent. Such a place is the transition of the wire from the body pillar to the door.
To find a broken wire, remove one end of the corrugation from the mount, along which the wires are connected to the door, and then pull each of the wires towards you one by one.
A broken wire will quite easily succumb to the pulling force and come out.
Failure of the control unit
Both the control unit located in the driver's door and the central control unit may be faulty.
For diagnostics you will need a tester. Check for voltage first on the control line conductors, and then on the power line.
Apply current in two ways: by turning the key in the driver's door lock and pressing the button on the portable control panel.
It will be extremely difficult to determine the necessary contacts for testing without an electrical diagram of the central locking system.
Actuator malfunction
There are quite a few reasons for the inoperability of actuators: oxidation or damage to the contacts, engine failure, wear and misalignment of the gears of the gearbox, failure to secure the fastening of the rods.
Much less frequently, but the cause of interruptions in the operation of the central locking may be contamination of the locking mechanisms or the ingress of foreign objects into them. Condensation accumulated inside the door can create many problems.
Before putting your car into the caring hands of a car service center or deciding to replace the central locking system with a new device, try to determine the cause of its malfunction yourself.
Good luck to you! No nail, no rod!