The sequence of connecting the central lock to the alarm depends on its type: pneumatic, with constant or variable polarity. However, in order to correctly connect the central locking system according to any of these schemes, you first need to prepare a tube probe. It is better to use a voltmeter to search for circuits on cars of the latest model years, so as not to damage the wiring.
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Central lock device
The central lock is a complex of assemblies with an electromechanical drive.
The central locking includes the following components:
- Control block;
- input sensors and buttons;
- executive devices (activators).
Central locking accessories
The boot lid and the fuel filler flap can also be equipped with locking devices connected to the central lock.
Control block
CU monitors the position of "limit switches", control buttons, as well as contact groups of door locks and other sensors, which are connected to the unit by wires.
Initially, the electronic part of the unit was contained in one housing with connectors. However, on new car models, CAN buses are also used, with the help of which it is possible to divide the central locking control system into individual elements... This allows them to be installed in different places on the body.
An example of a central locking control unit
Additionally, the BU may contain:
- Send a signal to the "turn signals", which flash briefly when locking / unlocking. With this option, the alarm can be connected to the appropriate wires, and the turning lights will be involved in its operation.
- Receiver of signals from the remote control. If this receiving device is outside the unit, then the connecting wires can also be used to control the car alarm.
If the central lock has a multifunctional complex control unit, then most of the wires of the installed security system are connected to its connectors. A separate connection will be required for a siren, alarm sensors, and, if available, an engine blocking device.
Input sensors and buttons
The central locking system includes several groups of input sensors used when installing the alarm:
These include:
- "Limit switches" - limit sensors car doors, defining their closed or open position. The supply of light to the corresponding lights in the passenger compartment depends on their signals.
- Door lock microswitches. They signal the closed / open state of the car door lock.
- Microswitches in the electric lock drive. They give signals about the state of door locking devices - locked / unlocked.
The control button in the cabin can be one on the driver's door or on the panel, or two on both front doors. The central lock is usually operated using a two-way button with three contacts - one common and two normally open. There are also two- or five-pin keys.
Executive devices
There are electromechanical drives and pneumatic drives of central locking devices (activators).
Pneumatics are no longer used in the design of central locks in modern cars; electric drives are used everywhere.
Electric drive
There are several types of electric drives differing in design with a pulling force of 2.5 - 6 kg. The most common types are square and T-shaped ("pistol").
The electric drive mechanism is housed in a plastic case. Structurally, it consists of an electric motor and a metal (or plastic) gearbox. When the polarity of the voltage supplied to the electric motor changes, the shaft rotates either clockwise or counterclockwise. The torque is transmitted to the gearbox, which converts rotary motion into translational motion. The direction of rotation determines whether the door lock is locked or unlocked.
The drives are controlled by means of a short-term impulse voltage - with a duration of 0.8 to 1.5 seconds. This is enough for the mechanism of locks to open or close. If the voltage supply time is made longer, the electric motors will be damaged.
Door lock electric drive circuit
Among the electric drives there are variants with two electric motors. One is used to close / open the lock, the second - blocks the mechanical drive of the locking device, not allowing it to be opened from the car using the handle or pull rod. These electric drives are controlled by three wires.
Electric motors differ in the presence or absence of a contact microswitch mechanically connected to a rising stem. Two motor leads are supplemented by three switch cables to form a five-wire actuator.
They are usually installed in the front doors of a car and a microswitch transmits signals to the two-wire motors found in the rear door locks. Corresponding commands (to close or open) are sent when the front doors are locked or unlocked with a key or when the control button is pressed.
Photo gallery: types of electric drives
Electric drive for opening / closing doors Trunk opening / closing electric drive
Pneumatic drive
The main structural element of the pneumatic actuator is a rubberized diaphragm with a stem, placed in a plastic case, in which a fitting for air supply is provided. Under pressure, the diaphragm rises, and when vacuum is lowered, moving the stem and locking or unlocking the lock.
Some pneumatic devices, like electric drives, are equipped with a contact microswitch. It is mechanically connected to the stem and works on the same principle as in electromechanics.
Some types of pneumatic actuators have moving-core electromagnets (solenoids). They provide additional protection and prevent unauthorized attempts to open the lock. If an effort is made to lift the stem without an enable command from the control unit, the microswitch is triggered and voltage is applied to the solenoid. The core of the electromagnet blocks the rod, at the same time the command is sent to the compressor to create a closing vacuum of air.
The principle of the central locking system
Locking and unlocking car doors and other body elements is carried out by turning a key in one of the door locks or by pressing a button installed in the cabin. Control signals are sent to the electronic unit, which gives commands to the drives to lock or unlock the locks of the doors, trunk and gas tank hatch.
Signals are transmitted by wire or in a non-contact manner - when a pulse comes from the remote control to the antenna and then to the control unit.
The central locking system also provides for the function of automatically unlocking all locks when the car gets into an accident.
How to connect the alarm to the central locking system yourself?
To independently connect the central lock to the alarm system, you need:
- experience in working with an auto electrician;
- set of tools;
- connection diagram ( detailed instructions) taking into account the type of central lock installed on the car.
Instrument preparation
The necessary set of tools for self installation car alarm should consist of:
- a set of Phillips and flat-blade screwdrivers;
- wire cutters or scissors for cutting the cable;
- set of wrenches;
- pliers or a tool for crimping terminals;
- knife or wire stripper;
- drill or screwdriver with a set of drills;
- soldering iron;
- network voltage meter;
- insulating tape.
Connection diagrams
The circuits under consideration are intended for car alarms equipped with built-in relays for controlling locks - they have three wires each for locking and unlocking.
The universal connection option is as follows.
Wiring diagram of the alarm system to the central lock
Central lock is controlled by constant polarity
Alarm wires connected to the central lock can be power or signal wires. For power outputs, use the following circuit:
The white cable connected to the alarm connector gives the signal for unlocking (UNLOCK), and the green cable for the locking (LOCK). The relay indicated in the diagram above is responsible for locking. Normally open contacts must be connected to "minus", common contacts must be connected to the signal wires of the central lock.
During installation, you should pay attention that the wiring from the connectors of the central locking electronic unit is not cut off - both alarm cables (white and green) are simply connected to it. It is not necessary to connect the wires of the security system to the relay connectors; you can hook them up to the low-current signal outputs.
If the central locking system uses not negative, but combined polarity, then when connecting, you should install diodes (the arrow on them should be directed to the signaling connector).
To connect to a central locking system with constant positive polarity, the same circuit is used, but with slight differences.
Normally open contacts in this type of central locking are connected to the positive pole, but not to ground. In the diagram, the upper relay gives a command to close, the lower relay to open. In this version, instead of relay contacts, you can also consider the use of signal outputs, but when installing diodes, the arrow should be directed to reverse side- to the central locking connectors.
Central lock is controlled by alternating polarity
When the central locking system is controlled by alternating polarity, the signaling is connected directly to the power wires.
Determine the required cables with a probe:
- One contact is placed to the positive pole, and the other is looking for a wire, upon contact with which the lamp of the device lights up. When the central locking is commanded to open or close, the probe lamp goes out.
- Then the first probe of the probe is moved from "plus" to "minus" and the signal is again sent to the central lock. The lamp of the device should light up when opening or closing.
When two power wires that control the door lock drives are found - you need to cut them to connect the alarm.
If the "signaling" has low-current positive / negative outputs, when connecting, two additional relays are used
After that, you need to connect according to the following scheme:
- HP contacts are connected to a wire with a positive pole;
- NC contacts - to the cables going to the electronic unit or to the central locking control button;
- O-contacts are closed on the control wires going to the door lock drives;
- the signaling output cables are connected to the relay coils from either side.
The second side of the relay is connected depending on the polarity of the car alarm output:
- positive output - to "minus";
- negative - by "plus".
Central lock with pneumatics
In pneumatic (vacuum) versions of central locking, instead of two wires, signals are transmitted one at a time. You can find the control cable in the luggage compartment near the compressor or under the rear seat. At the moment the locks are unlocked, it will have a positive charge, when locked, it will be negative.
Alarm connection diagram:
The required cable is determined by the probe - one probe of the device is set to "minus", the other is checked the wiring, closing and opening the central lock. When unlocked, a positive charge is recorded on the control wire, and the device lamp will light up. Then the probe probe moves to "plus", and the other is held on the same wire and when locked, a "minus" should appear.
The cable found is carefully cut and connected to the alarm contacts. To avoid confusion and damage to the electronics, you can apply a positive first, then a negative charge through the probe to the end leading to the compressor. If everything is correct, the door locks will open, then close.
If the alarm system to be installed has built-in power relays, then the connection is carried out as follows:
- at the unlocking relay, the NO contact is connected to the "plus";
- NC contact - into a break in the wire directed to the central lock control button;
- O-contact - to the NC-contact of the locking relay;
- at the locking relay, the HP contact is connected to the "minus";
- O-contact - in a break in the wire directed to the compressor.
Connecting the central lock to the alarm system by yourself has the following difficulties:
- In the absence of the skills to work with the electrical circuits of the car, it is easy to make a mistake in the installation, which can lead to a short circuit, failure of the central locking and alarm elements.
- Some parts of the central locking system and additional equipment may be difficult to access.
- Simple security systems with a minimum set of sensors are more suitable for self-installation.
- To connect complex car alarms (with GSM module, starting turbocharged engines, auto-heater, etc.), it is better to contact a specialist.
- When installing the alarm, it is advisable to avoid interference with the central locking control units. Soldering should be done in them only in last resort, dispensing, if possible, by installing relays, diodes and other elements. You can use special modules that allow you to connect and configure the security system via CAN buses.
Checking the installation
To check the correctness of the installation, perform the following actions:
- Connect the battery and give a command from the remote control to block the central locking. To be on the safe side, you need to leave one of the door windows open. This will allow you to open the car manually if, for some reason, the unlock command does not work.
- After blocking the central lock, a command is sent from the remote control to unlock.
- After correct execution of the commands, the wire connections are insulated with heat shrink tubing or electrical tape.
If at some stage of the test the system does not receive a signal and is triggered, you should check the correct connection of the wires again. If they are connected correctly, there may be damage somewhere.
Two people identify the malfunction - one will send signals from the remote control to block and unblock the central locking system. At this time, another, with the help of a tester, will check the voltage at the power outputs of the security system and at the fuse contacts. You also need to check the voltage at the contacts of the central lock button.
Video rules for checking alarm connection
Photographed by AUTOSECURITY channel - Anti-theft studio.
Which is better: alarm or central locking?
The anti-theft capabilities of the central locking system are low compared to the alarm system. An intruder can easily break glass and steal a car without a key relatively easily by closing the ignition contacts.
Compared to the standard central locking system, the car alarm provides additional degrees of protection:
- The fact that the alarm is installed, as indicated by the flashing LED beacon in the passenger compartment, reduces the risk of burglary.
- Sound and light signals given when an unauthorized entry into the car is attempted attract attention and scare away burglars.
- Modern security systems have an option (immobilizer). Even in case of penetration into the passenger compartment and turning off the siren, it will be impossible to steal the car.
- Many alarms inform the car owner about the state of the car, which is displayed using a feedback system on the key fob display. For hacking attempts, an alarm and a danger message will be sent to the remote control.
Installation of modern car alarms also makes the operation of the car more comfortable. For example, it can be used to set or turn on the pre-heater.
Any car owner is familiar with the advantages of a central locking system (CL). But not all vehicles are equipped with this. convenient device... Especially it concerns domestic cars... In the basic configuration, the VAZ 2109 did not provide for central locking. Blocking of all doors is solved by installing a car alarm. But a good security system costs a lot of money, and you have to pay for the installation. An excellent alternative for the "nine" will be the central lock, which will be installed by every car enthusiast.
Central locking structure and circuit
Central locking allows you to close and open four doors by turning the key in the driver's side lock using an electronic key fob or a button in the passenger compartment. The universal mounting kit is available from automotive electronics retailers.
We recommend paying attention to the remote control kit. This function will allow you to block all the doors of the car by pressing one button on the remote control. The second usefulness of the kit is the presence of a blank for the ignition key. By contacting a special workshop, you will receive a set of spare keys for your car.
The mounting kit contains everything you need to successfully install the central locking system in any car
The universal set of central locking includes:
- Control block;
- four electric motors with worm gears;
- metal rods;
- wiring;
- fuse;
- auxiliary mounting plates made of metal;
- self-tapping screws.
The central locking control unit is connected to electrical network car. When receiving a signal from the remote control or after turning the key in the driver's door lock, the electric motors start to work. Through the gearbox and rods, the force is transmitted to the lock mechanism. As a result, the doors are locked or unlocked.
1 - standard connector for VAZ 2109, 2 - 10 A fuse, 3 - central locking control unit, 4, 5, 6 - electric drives for passenger doors, 7 - electric drive for driver's door
Installation instructions
For self-integration of the central lock into a VAZ 2109 car, you will need:
- installation kit;
- insulating tape;
- s-shaped corrugations for wiring;
- nippers;
- screwdriver or drill;
- screwdriver;
- plastic clamps.
Tools and materials in the photo
Central lock set 
Screwdriver 
Rubber bellows 
Insulating tape 
Clamps
Some important points
- Before starting the installation of the central lock, be sure to remove the terminals from the storage battery. This will help to avoid accidental short circuits during installation and protect the electronic devices of the vehicle.
- The central locking control unit is located under the front panel. This will make it easier to connect to the electrical network.
- An electric drive with four terminals is installed in the driver's door.
- Before installation, consider how the wiring will go to the rear right door. Most often it is placed under the carpet and secured with plastic clamps.
Step by step guide
Video on the installation of a central locking system for a nine
Below is a video. It will help you avoid difficult moments when installing yourself:
After watching the video and reading the instructions, each motorist can easily install the central lock on the VAZ 2109. The whole process will take about two hours. The ready-made kit will facilitate installation and save time.
Central lock in the car can work independently or in conjunction with the security system. In the first case, it will be necessary to close only the driver's door with a key, the rest will be closed mechanically. When working in conjunction with the alarm, the door locks will close when the car is armed.
You will need
- Central locking kit
- Wires
- Drill
- Side cutters
- Door caps
- Insulating tape
Instructions
1. If the car is not equipped with a central lock, it is allowed to install it additionally.
2. Remove the trim from all doors.
3. Install electric drives in them. The central locking kit comes with a rod with a boom, which is connected to the standard door rod of the car. The drive itself is carefully drilled to the protruding metal part of the door.
4. The wires from the locks are routed to the central locking unit. The unit itself is better placed under the dashboard in an unattainable place.
5. Put the door trims in place using the standard caps.
6. The wires from the unit are connected to the car's wiring. Black wire (minus) is connected to ground, scarlet (plus) to + 12V.
7. Central lock allowed to connect to the alarm. Then, when arming or disarming the car with the alarm panel, the door locks will be mechanically closed or opened. To do this, you need to connect the wires coming from the central locking unit to the fuse box located in the hood.
8. In some cars, the central lock factory installed, it is powered by a key fob. In this case, it is allowed to connect lock to the alarm and make a step-by-step disarming / arming of the car. First, it will be necessary to remove / arm the car with the remote control from the alarm, then open / close the door locks with the remote control from the central lock.
Related Videos
Installing a central locking system guarantees additional protection from intruders and increases the level of comfort of the car owner in the process of using the car. What functions does the central locking system perform and what needs to be taken into account before it self-assembly? What tools and equipment are required to perform this type of work? What algorithm should be used during the installation of the central lock and its connection to the alarm? Our article answers these and a number of other questions.
Central locking is a device that provides automatic closing and opening of car doors from one drive. The advantage of such a system is to control the door locks remotely, that is, by pressing the button on the key fob.
Many modern cars are already equipped with a central lock, which allows the car owner to use such a convenient option without additional work. But on older machines there is no central lock. In such a situation, the car owner is forced to personally solve the problem of finding a suitable device and connecting it. The second option is also possible - contacting a car service, but in this case you will have to spend a lot of money.
Appointment of central lock
Before installing the system, understand its tasks and needs just for you. So, the central locking is an additional device that provides comfort and quick opening / closing of doors by remote control(via the remote control button). In addition, modern devices control not only the door locks, but also open the luggage compartment locks, the gas tank lid and even the sunroof built into the car roof. If the car has power windows, they are often controlled by remote control as well.
Composition and principle of action
Generally speaking, the central locking system combines a group of devices, including:
- Input sensors.Limit switches built into the doors of a car are used as these devices. Alternatively, microswitches (installed in the lock) can be used;
- Control block- "brain" of the system, which receives commands from the remote control and gives the task of opening / closing locks;
- Executive elements(they are also called activators). Their task is to execute the command, which is given from the central unit.
The central locking principle is extremely simple. The data from the switch are sent to the car's ECU, after which they are transmitted to the central locking control unit. After that, the signal is redirected to door blocks, where it is transformed into a command aimed at the operation of actuators of locks in the doors. After receiving the command, the control units built into the doors give a command to the activators (they look like motors or drives powered by a voltage of 12 Volts).
Types and options
Before installing the central locking system, it is necessary to prepare all the equipment and tools. The most important thing is to choose the central alarm itself. Here, give preference to mechanisms that are installed directly by the manufacturer of the machine. The disadvantage of this option is the high price. In some cases, it is better to choose more affordable modifications that are not inferior in functionality to their counterparts.
Today, the most in demand are universal sets that are sold in specialty stores. Typically, these kits consist of a group of wires, cables, controllers and fixtures. In more advanced devices, a control panel is included in the package.
Pay attention to the fact that central locking can be of two types:
- Mechanical.In this case, mechanical action is required to open / close the locks, that is, the physical turn of the key by the owner;
Many car owners are trying to save money and refuse useful options, for example, glass finishing. Should not be doing that. If the function is really important (including for general security), it's better to spend a little more money and the time to install it. For example, the same glass closer helps out if you left the car, but forgot to close the windows. At the moment of pressing the central locking button, the closer performs this work independently. Another useful option is the automatic blocking of all doors when a certain speed is reached, which is extremely important when children are sitting in the car.
What to prepare for work?
Please note that connecting a central locking system requires a certain set of tools and material:
- Door locking system, namely the control unit and the executive unit (activator);
- Two-core wire. Use a copper conductor. Moreover, its length should be 3-4 meters, not less;
- From the tool - screwdrivers with a Phillips and straight "sting", spanners, pliers;
- Additional equipment - vise, cable cutting pliers, insulating tape and drill with drills.
Subtleties of installation: general provisions
Once preparatory work completed, the installation of the central locking begins. First, remove the trim and dust curtains. Buy latches in advance from the store, which will have to be changed. Now remove the connected terminals from the battery to avoid short circuits during operation. And in general, the process of installing the central locking system is associated with a large amount of work in the electrical part.
Decide on the point where the central lock will be mounted. When choosing a place, make a decision on the current position of the internal components of the power windows, as well as the glasses themselves. Please note that installed mechanism should not create additional obstacles to work. In some cases, it may be necessary to install additional brackets to fix the lock.
Once the location is selected, secure the lock using simple self-tapping screws, and then combine the device with a rod that pulls and raises the button to close the car doors. Pay attention that the device moves smoothly without additional friction.
Now customize your work electrical circuit the whole castle. First rate appearance activators and wiring that fits them. Typically, there are four wires to control and power the device. Half of them are directed towards the body and are responsible for opening / closing the lock, and the other two are connected directly to the activator.
Remember that all system wiring must be protected from external influences and accidental chafing. To do this, be sure to hide it in a special corrugation. It is not worth putting additional protection - it is already in the car. It is easy to find it between the door and the pillars of the body part.
Run all wires in corrugated tube, and direct it under the deck of the car to the drive, which controls the central locking system. To eliminate errors with the connection, use the information from the instructions for the device. Please note that the requirements are different for each model. At the same time, do not rush to close the trim on the doors. Perform this work after a comprehensive check of the system, which requires connecting the terminals to the battery.
Immediately make sure that the clamps are correctly adjusted, which are directed from the central locking rod. If everything is normal, this stage of work has been successfully completed. More detailed connection instructions are given below.
How to switch central locking with signaling?
Central locking is only half the battle. The device itself does not provide adequate protection against intruders, and it is not difficult to hack into it. For this reason, it is important to combine the central lock and the already installed alarm system. You can also do it yourself here. All that is required is to be attentive.
First, figure out the type of alarm that is mounted on the car. In particular, you are interested in the control pulse of the device. Two options are possible here - positive, negative or pulse with alternating polarity. To simplify the solution of the problem, let us highlight the main difference between each of the indicated types.
So, if the lock control produces a "minus" impulse, the doors are unlocked if a corresponding signal is given. If a "positive" impulse is used for control, then the command must be the same. There is also a mixed type of central lock, when control is carried out using a pair of power conductors. For example, "plus" is given to open doors, and "minus" to close. But the latter arrangement is rare - most often on US-made machines. Connection must be made depending on the type of impulse.
To find a suitable wire, use the simplest device - a probe. Check the outgoing wires and find the one that is needed in your particular case. For example, if you need wires to open / close doors, be guided by their signals. One of them will show "minus" (when opening), and the second - when closing. This principle works for the "minus" circuit. If a positive impulse is used, then it is necessary to look for "positive" wires.
When performing work, be extremely careful and discard the power terminals from the battery. When making connections, insulate all wires to prevent moisture from entering the contacts or their accidental shorting during operation. Otherwise, the system will not work for a long time.
Algorithm of actions: step by step
To simplify the installation process central alarm, select step by step instructions to action. The connection algorithm is as follows:
- Remove the terminals from the battery and dismantle the door trim. To dismantle the panels, first unscrew the fastening bolts and remove the handle. Be aware of the latches that are located on the edge of the lock. If a plastic screw is provided, unscrew it;
- Choose a place for installation (this was already mentioned above). If an additional bracket is required, install it;
27.01.2017
The absence of a central locking in the car is not a problem, it turns out that you can easily mount and install it yourself.
This enterprise will not require significant costs, but a certain manual dexterity and skill must be possessed.
Central locking functions
The main characteristics of a car central locking system are convenience and comfort, since it is enough to press a button on the control panel to unlock all the doors of the car.
Along with this, the central locking system opens and closes the tailgate, the fuel tank cap and the upper hatch. If the car is equipped with power windows, they can also be activated by pressing a button on the central lock control panel.
Principle of operation
The central locking (CL) consists of incoming sensors, a central locking control unit and an actuator (activator).
The central locking works according to the following principle:
From the switch, the message is sent to the electrical control unit, which forwards these messages to the central locking control unit.
- The door adjustment units then activate the actuators.
Preliminary work
To install the central lock without the help of specialists, you need to purchase a mechanism and attend to the availability of the necessary tools.
There are two types of central locks: mechanical, is put into operation by turning the key and electronic activated by pressing the remote control button. If you connect the central locking system to the alarm, you can also enhance the safety of the car.
To start work on installing the central lock, you need to have, in addition to the car, a centralized locking system of locks consisting of a central locking control unit and an activator. You will also need two-core wires and other auxiliary tools.
If the financial issue is not acute, then you can purchase a universal kit in a specialized store, consisting of wires, controllers, cables, fasteners and other things.
The first stage of the central lock installation
- Remove the door panels, but first disconnect the battery terminals.
- Consider a suitable location for installing the central locking, paying attention to the location of the power windows. In some cases, it is necessary to make special brackets for fastening.
- Install central locking activators on each door, for which you need to make holes and fix them with self-tapping screws.
- Attach each activator to the door with clamps and combine the stroke of the activator pull and the lock pull. Install the fasteners on the rods from the first hand block castle.
- Attach the cables from each actuator with plastic clips.
The second stage of the central lock
- Remove the dashboard and poke points near the front panel attachment points to simplify the cable management task. Since they will be laid through the wiring of the electrical cords under the torpedo and in the glove compartment.
- Remove the previous cables of the electric window lifters, bring in new ones and connect them to the drive.
- Lead the wires of the actuator, wrap them with electrical tape and push them inside the door.
- In order to lead the wires under the dashboard and into the glove compartment, you need a certain skill.
- Carefully, using a screwdriver, install the pass-through pipe into the rack.
- Then the wires are connected to the connector and connected to the power supply unit of the central locking system.
- The “minus” wire of the central lock is connected to the car body, and the “plus” wire is connected to fuse # 1 on the battery.
- Test the mechanical and electrical parts of the central lock in operation. As a result, the move should come out smooth and easy.
- Return initial appearance torpedo and side door trim.
