Connection Schemes for Central Locking to Alarm System

Author temass

Date
Jul 18, 2017
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The desire of drivers to protect their vehicle from break-ins and theft is quite logical. Central locking has become a popular means of security along with alarms, automatic door locks, and immobilizers.

• Purpose and design of central locking
• Operating principle of central locking
• Key fob and ignition key control
• Electrical circuits for central locking
• Ford car door diagram with external relay
• Audi central locking diagram
• Scheme for VAZ2110
• The connection diagram, as well as wires, 2 remote controls, a unit and actuators are included in the remote central locking kit.
• Installation and connection of the unit

• Where is the fuse located?

Purpose and design of central locking

Central locking in a car is the general name for the system for locking the locks on the car doors and the fuel tank lid. The function is not mandatory, so the driver himself decides whether he needs to install it. The central locking of the car door works both with the ignition on and off.

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Central locking with remote control consists of:

• incoming regulators - located in the lock design and in the door limit switches. Their main purpose is to record the current position of the doors, as well as transmit a signal to the control unit. Two more sensors are located in the cam mechanism, which is mounted on the front doors. Thanks to this, they are blocked/unblocked. Signals are sent to the control unit;
• central locking control unit – distributes received impulses to a similar central unit. Subsequently, the signal is sent to the door control units, trunk lock and fuel tank. The central locking unit is connected to all sensors and wires, therefore it is the main element of the security system;
• actuators are essentially a DC motor connected to a gearbox.

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Comments and reviews

Lock with a positive impulse mechanism Similar to the first type of central lock, this device is also controlled via two wires, only in this case a positive supply will be required to operate. The easiest way in this case is to connect an alarm with low-current negative outputs, since it is carried out directly through the connection to the control wires of the lock. The remaining wires are connected for light signaling, glass closers, etc. The specificity of this system is that the cables found control the door mechanism drive. K37 - central locking control unit.

Initially, the electronic part of the unit was contained in one housing with connectors. What difficulties may arise and how to overcome them The connection process is quite labor-intensive, so users may encounter some problems: The problem of choice with a wide variety of security systems.

The current consumption of a conventional electric central locking drive can reach 5A at its peak. It takes two people to determine the malfunction - one will send signals from the remote control to lock and unlock the central locking system. This wire is located either near the compressor in the trunk or under the rear seat, or comes from the central locking control button.

In some models of security systems, low-current signal channels are used as outputs rather than relay contact components. This leads to the unlocking of the locking devices. In auto stores you can choose wires of various diameters, colors and lengths. ✅How to connect central locking to any car?

Operating principle of central locking

The central locking system, as a rule, comes from the remote control. For this purpose, a special sensor was specially built into the lock handle, and a receiving antenna was built into the main block. You can drive the car from a distance of up to 10 m.

To activate, press a button on the remote control, the signal is transmitted to the antenna and the doors are locked. At the same time, the alarm immediately comes into readiness.

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In the event of an emergency, locked doors open automatically.

During locking, microswitches are activated via the remote control or by turning the key. What happens next is:

1. The central locking wiring diagram analyzes the received pulses.
2. The communicator sends signals to the main and other units.
3. The actuators receive a signal to block. All locks close automatically.

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Which is better: alarm or central locking?

The central lock has low anti-theft capabilities compared to the alarm system. An attacker can break the glass without much effort and relatively easily steal a car without a key by closing the ignition contacts.

Compared to a standard central locking system, a car alarm provides additional degrees of protection:

1. The fact that an alarm system is installed, as indicated by a flashing LED beacon in the cabin, reduces the risk of burglary.
2. Sound and light signals given when an unauthorized entry into the car is attempted attract attention and deter burglars.
3. Modern security systems have an engine blocking option (immobilizer). Even if someone breaks into the car and turns off the siren, it will be impossible to steal the car.
4. Many alarms provide the car owner with information about the condition of the car, which is displayed using a feedback system on the key fob display. When attempting to break in, an alarm and a danger message will be sent to the remote control.

Installing a modern car alarm also makes car operation more comfortable. For example, you can use it to configure remote engine start or turn on the preheater.

Key fob and ignition key control

Central locking with remote control is becoming increasingly popular. If control occurs from the key fob, then the alarm and central locking control occurs automatically. After pressing the button, the signal goes to the lock and the doors are locked.

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Starline does not open or close doors using the key fob: main problems and solutions

The Starline alarm system is a reliable system that protects the car from theft, but at the same time, problems may arise with opening the doors using the key fob. They may be due to a simple decrease in battery charge or incorrect signal recognition by the system. But in some cases the situation is more serious and there are several ways to solve the problem.

Problem with opening doors after autostart

After using the autostart function, the Starline alarm system can block the automatic opening of doors even if the system is disarmed. In this situation, you have to use the key and open the car manually.

The problem may be caused by incorrect connection to the central locking control circuits during installation. To solve, it is necessary to reconnect 2 alarm wires responsible for controlling the lock, provided that there are no problems with the circuits responsible for the operation of the seat belt.

If the seat belt cover in the driver's seat is closed, the doors will not open.

It is also necessary to take into account the indicators on the key fob - unlocked/closed lock. This indication indicates arming or disarming, but not unlocking or locking the door.

None of the alarm systems, including Starline, have the ability to control the process of opening and closing the central lock and simultaneously display the operation on the lock screen.

Problems with locking the car with the key fob

The Starline alarm system may have problems locking the car. At the same time, the warning system operates normally, but the doors remain open. The reason may be a simple disconnection of the plug under the driver's seat.

Therefore, the alarm system cannot recognize the signal from the limit switch about the door opening, which entails the automatic installation of the car in the security mode within 30 seconds. The fuses on the contacts in the alarm unit may also be damaged, preventing the signal from being sent.

Diagnosis and solution to this problem can be achieved in the following ways:

• Without removing the key from the ignition switch, you must open the driver's door and then remove the key. Then slam the door and put it in security mode.
• Disconnect and reconnect the negative terminal from the battery.
• Pull the handbrake, remove the key, open the driver's door, press the central locking button to close all other doors, close the driver's door and press the lock button on the key fob.

If after these manipulations the problem is not solved, then you need to contact the Starline service center for advice and a possible replacement of the system during warranty service.

What to do if the drive does not work?

In case of any breakdown, all equipment should be fully diagnosed in order to figure out where exactly the failure occurred.

The central locking drive will not work and transmit a signal to the doors if the contacts are oxidized and the conductive wires are broken due to this. There is simply nothing to transmit impulses with. In addition, the limit switch of the door activator could be broken, so the signal is not received.

Repairs should begin with checking the power supply and the integrity of the wires - most often the break occurs between the body and the door.

If the breakdown occurred in a VAZ car, then the search must begin with the fuse.

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Where is the fuse located?

The part can be located in two places: under the center console or in the mounting block. However, the fuse link is located behind the fuse block. In most cases, oxidation of the wiring occurs, so it is recommended to replace the conventional fuse with a flag fuse.

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FakeHeader

Comments 31

Hello. Can you please tell me how and where to connect the power window closers?

the green wire is responsible for the impulse for the power window module

Why is it necessary to install a relay on the trunk? Why can’t you put a plus from the battery and a minus from the block onto the activator?

because there is a low-current control on the block, it will just burn out, that’s all, so that it doesn’t burn out, they put a relay

Damn, I read the first comments and my brain exploded, but if you understand the essence like this, then neither the alarm nor the immo or anything else will save the car from real thieves. Why all this controversy? Central locking is a really convenient thing, it won’t affect safety in any way, an experienced thief will open your trough in a couple of minutes, but an inexperienced one will stupidly take out the glass and steal what he can, so now put bars on the windows? The original system can also glitch, but the signaling system was correctly noted, this is not so much protection as a way of attracting attention, not effective as practice shows, because everyone is sick of empty alarms and no one reacts anymore. By the way, a fun fact: for about 3 years now, if not more, I haven’t heard a single car screaming in the yard at night. The time has probably passed when it was fashionable and the car was screaming every leaf that fell on it.

what's the use of it? it doesn’t guard, it’s probably broken by a code grabber. a waste of money

How can you not understand that this is from the budget segment, for people who lock their car with a key and there has never been any security there and never will be, and they don’t give a damn about whether it is protected there or not, they are just tired of poking around with the key. that's what it's for

and it is not yet known when it will glitch or burn the locks, because only God and the Chinese know who wrote the software for it and how

No matter how crookedly it was written there, it will be more reliable than the electrician Vasya, who will write the software. The Chinese are leaders in this area. Tell me what is not China now?)

I beg you, you apparently haven’t worked with such equipment, I have, it would be better if our programmers wrote it. You don’t know how Chinese programmers work? Like bad doctors, they treat one thing and cripple another, they corrected 1 mistake, introduced 3 new ones. This applies even to large factories, everyone is guilty of this.

There is a good product. There is a cheap one in which everything speaks for itself, like here. for 500 rub. There are other blocks for 9 thousand. Can you feel the difference? The quality is also felt. I can’t say anything about the Chinese doctors, my father attended a couple of sessions, and it helped him a lot, he visited our doctors, and he was no longer alive.

They can ruin even a good product, it’s been verified. For 9 thousand there is already an alarm system with auto start, nothing like a simple central locking system. I was not talking about Chinese doctors, but about crappy doctors. At least read the text carefully. The fact that my father passed away after visiting our doctors does not necessarily mean that the doctors are to blame; the reason could be the incurability of the disease, such as CANCER, for example.

Don't be funny ok? My neighbor died because the doctors made an incorrect diagnosis. Afterwards, treatment with various medications was prescribed, which in turn brought him to the next world.

Checking for correct installation

To check the installation is correct, perform the following steps:

1. They connect the battery and give a command from the remote control to lock the central locking. To be on the safe side, 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.
2. After locking the central locking system, a command is given from the remote control to unlock it.
3. After correct execution of the commands, the wire connections are insulated with heat-shrinkable tubing or electrical tape.

If at any stage of the test the system does not receive a signal and operate, you should once again check that the wires are connected correctly. If they are connected correctly, there may be damage somewhere.

It takes two people to determine the malfunction - one will send signals from the remote control to lock and unlock the central locking system. At this time, another, using 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 locking button.

Connection in practice

Let's see how to connect an alarm system to the central locking in practice. To install it you will need a set of screwdrivers, a set of wrenches, a soldering iron and soldering supplies. You will also need multi-colored single-core wire, a multimeter, insulation and fasteners.

The first step is to find the unit that controls the central locking. On a VAZ car you will have to tinker with the search for a long time. The central locking unit is located near the heater in the area of ​​the front passenger seat behind a plastic plug. It must be said that its location is extremely inconvenient. To make the work as convenient as possible, you need to disassemble the interior of the car.

When connecting, it is better to select a wire of the same colors as the wires from the central locking control unit. Whether additional relays are needed depends on the alarm model. In some cases, fuses and power switches may not be able to handle the load.

The simplest way to connect an alarm system to the central lock of a VAZ-2114 and other similar models is to solder the control wires into the gap. In most models, you should look for white and brown wire. You will need a four-wire cable that is laid from the relay in the alarm unit to the door actuator control connector.

To avoid problems when using the central locking system in a car, you need to carry out work with the battery disconnected. Any wiring should be connected only by soldering or using terminals (insulation is required). The cable or wire is taken with a reserve. Then the cords are laid in bundles and secured to the body elements. Keeping the color of the cable will help when you need to quickly find the right cord.

Step-by-step preparation for installation of the central locking system

The work begins with purchasing the necessary kit and preparing the tools. There are two options: either you will control the locks from the key fob, or the system will be triggered when you turn the key in the driver's door lock. If we talk about convenience and practicality, of course, we should give preference to the remote control method. Therefore, we buy a standard universal central locking kit, which should include:

• Instructions;
• Keyrings;
• Central control relay;
• Four motors;
• Planks, wires, screws.

If necessary, we buy an additional set of wires. We will also need black electrical tape; it should be made of a special material that can withstand different temperatures.

Tools for work

We immediately draw your attention to the fact that it is not the installation of the central locking itself, but rather the connection of the central locking to the alarm system that can cause a number of difficulties and problems. To perform the task accurately and correctly, we need a special device - a probe.

With its help we will find the necessary wires to connect these two systems. Again, there are two options here and it all depends on how exactly the central locking works. When considering locks triggered by a negative impulse, we prepare not a diode probe, but its analogue with a light bulb.

All that remains is to collect the tools:

• Corrugated tubes;
• Drill;
• Drill;
• Screwdriver;
• Screwdrivers;
• And some other little things.

By the way, keep in mind that you will have to remove the door trim. In this regard, purchase the buttons on which it is held in advance; they are disposable. What you dismantle cannot be reused.

Self-installation

We carry out installation in stages. We leave the connection with the anti-theft agent for later, we will deal with it last. We start the work itself by installing the necessary elements and only then move on to the electrics.

First, remove the door trim. We also get rid of the panels between them and the thresholds below. The first to use is the control unit, which, in the old fashioned way, is recommended to be mounted in the lower left corner of the driver's door. In fact, you can choose the location yourself, the main thing is to remember that it should not interfere with the operation of other mechanisms, for example, window regulators.

Alternative installation location for the control unit

The next stage is the installation of engines. In the kit you will find four motors, one of them with four wires. We attach it to the driver's door, the remaining activators are also installed on the car door. If your vehicle does not have the required mounting holes, you will need to drill them with a drill.

Activator installation process

Now we are ready to start working with the wires. Scatter them around the cabin, as if outlining what will go where. Remember, we lay the wires in protective tubes, which will protect them from contact with moisture, dirt, and with each other. To perform this work, you can use the space under the front seats, the free space between the doors. If necessary, you can also drill a few holes. But do not forget that their diameter must be increased to match the size of the corrugation. Further connections are made according to the diagram. Everything here is purely individual and depends on the type of electric locks. Our main task is to bring them all to the control unit.

Electrical connection diagram

After this, you can return the battery to its previous state and perform the test. If connected correctly, there should be no problems. Remember that as soon as you return the negative terminal to its place, the locks will work automatically, so either do not close the doors or leave someone inside the car.