How to repair the rear door of a Lada Granta

Sequence of actions when replacing the rear right (left) door handle

We carry out the work modularly, since initially it is necessary to dismantle the casing, the internal filling, and unscrew the handle latches.

Stage No. 1: dismantling the card.

1. We place the car on the site, provide priority safety measures, and activate the parking brake.
2. Open the rear left door and raise the glass to the top position.
3. We twist the blocker (soldier).
4. Use a screwdriver to pry up the fastening of the window lifter handle, remove it from the grooves, and remove the lock.

Stage No. 2: disconnect the door lock rod and remove it from the door cavity.

1. Using an “8” socket with an adapter, unscrew the bolt securing the handle.
2. Using a screwdriver, carefully pry and disconnect the lock bars from the inside.
3. We move the handle in the “forward” direction and remove it.

This completes the process of dismantling the unlocking element. Next, we carry out preventive maintenance, install new parts, and assemble the structure in the reverse order.

Control block

The block is responsible for the operation of the lock. The control circuit includes digital elements - they transmit a signal to the rest of the system components.

This device of the car central locking system interacts with the alarm system and can also be controlled by a remote control. You can install it yourself, but most modern cars already have central locking with remote control.

The remote control operates from a separate electronic unit, which is connected to the system and controls it.

Review of Manufacturer Prices

*prices are current as of November 28, 2018.

Recommendations for selection

Without a doubt, when choosing, give preference to parts with factory catalog numbers. Purchase consumables exclusively from official representative offices, service stations, and auto stores.

Before purchasing, check the catalog numbers of parts with the actual data specified in the operating instructions. If such a book is not available, seek advice from service center specialists, download recommendations from the Internet.

Connecting the lock to the alarm system

Connection to the alarm depends on the type of car central locking device:

• Controlled by negative impulse.
• Controlled by positive impulse.
• Controlled by a mixed impulse (almost never found).

The type of pulse determines what charge it is connected to the car alarm.

The difficulty lies in finding the necessary wires on which the pulse is determined using a probe. First you need to check the wires coming out of the door. If they are found, the door will open or close.

If the wires are not found, you need to check the central locking unit. You can find it by listening to the relay clicking. If you manage to disassemble the block and find the impulse points, the alarm is attached here.

Another possible location for the wires is at the driver's door of the car.

For the first two types of impulse, the search is the same, you just need to set the desired impulse.

Long gone are the days when drivers could safely leave their cars with the doors open, and car thefts were so rare that they were discussed for months afterwards.

Today it is difficult to imagine transport without a full-fledged security system, an integral part of which is the central lock. Using this device, you can simultaneously block not only the doors, but also the fuel tank, depriving thieves of the opportunity to drain all the gasoline. What is central locking?

What is central locking?

Central locking is one of the additional comfort systems and locks the doors when you press the remote control button. In addition to the doors and tank lid, it also closes other vehicle locking devices - the top hatch and luggage compartment.

Blocking can be done through centralized or decentralized control. In the first case, the machine is equipped with a single unit that automatically closes all the locks; in the second case, a separate electronic unit is mounted on each door.

How the central lock works

The central locking system operates both with the vehicle ignition on and off.

When you lock the entrance doors with a key and turn the key in the lock, a microswitch is activated, which is responsible for blocking. The signal from the switch is sent to the door control unit and then to the central control unit. The central unit generates control signals to all door control units and electric motors of the rear door and fuel tank lid actuators. The activation of all actuators ensures that the car doors are locked. A signal from a microswitch in the central locking device prevents the electric actuator from being activated again. Unlocking all doors is done in the same way.

Remote door locking is carried out by pressing the corresponding button on the ignition key. In this case, the signal arrives at the receiving antenna of the central control unit. After processing it, the control unit transmits signals to the door control units and actuators of the rear door and fuel tank lid. The activation of all actuators ensures that the car doors are locked. When remotely blocked, the car alarm is activated. Door locking can also be accompanied by automatic raising of the car windows.

In the event of a traffic accident, locked doors open automatically. The signal from the passive safety system control unit is transmitted to the central control unit, which in turn activates the actuators and opens the doors.

Adjusting the rear door lock

The doors are difficult to open, the lock is jammed, an extraneous squeak appears when unlocking - the first signs of the need to adjust the door lock. The problem is common among domestic transport.

The left side wears out prematurely due to frequent use.

Inexperienced owners practice eliminating damage by lubricating the mechanism. However, the effectiveness of such a solution is low. Service station technicians recommend the following adjustment:

1. Loosen the bracket using an impact screwdriver.
2. Move the bracket up (down) a few millimeters, while simultaneously trying to slam the door. We move the mechanism a few mm and check for functionality
3. As soon as we achieve the result, we firmly fix the bracket.
4. Lubricate the rod with a thin layer of Litol, graphite lubricant.

This completes the adjustment of the rear door locks.

The above algorithm is effective provided the lock is in good condition. What to do if there is a curvature or deformation on the door frame? In this case, the experts advise making improvements:

1. We open the back door.
2. We insert a plastic stopper into the lock so that it does not close.
3. Using a triangular file, carefully file off the sharp ends of the lock teeth. We do this carefully so as not to break the mechanism. The place to be filed with a file
4. We remove the plastic stopper and check that the mechanism is working properly.

Along with adjusting the lock, you have to adjust the door. The reason is the increase in the radius of curvature of the frame. The defect is common and can be corrected by straightening the curvature.

No special tool is needed, the strength of the hands of the master (repairman) is enough.

Since 2015, AvtoVAZ has launched mass production of rear door locks of a new type on the Lada Grant. This is a modernized version of the previous locking mechanism.

The main difference is not only in cost, but also in the change in design and the use of durable polymer. This made it possible to significantly reduce the knocking sound when hitting a metal loop.

How it works

The car central locking system includes:

• Input sensor: limit switches and microswitches.
• Block – central locking control.
• Actuators.

Input sensors include:

• Door limit switches – are responsible for the location of car doors, transmitting a signal to the power supply.
• Microswitches are responsible for the structural elements of the locking device.

• Two microswitches fix the cam mechanism of the front doors: one is responsible for the “lock” signal, and the other is “unlock”.
• Two more are responsible for the central locking.
• Microswitch for the lever mechanism of the lock drive.

Such a device involves transmitting a signal from microswitches first to the control unit, then to the power circuit, through which the signal goes to the doors (actuators), trunk lid and fuel tank flap. Result: the locks open.

An actuator is an actuator that causes the lock to operate.

The system operates remotely (remote control): There is a special remote control button on the ignition key, the signal is transmitted to the antenna, and from it to the unit. The range of the remote control is 10 meters. You can connect to an alarm system.

Reviews

Conclusion The door lock is replaced only if it is damaged, deformed, or defective. The design of the mechanism is not complicated, and the operating principle is intuitive.

How to care for your central locking

Central locking in a car is a set of systems that provide additional convenience and safety, but it requires additional care. Problems with car locks usually arise in winter: after washing, if the locks are not properly ventilated, moisture freezes in them and grabs the rods.

To prevent this from happening, the car must be kept with the engine running, periodically forcing the locks to work, for about an hour. Or just drive around the city until the car dries out.

More information about the device and connecting the central locking in the video:

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Central locking functions

The advantage of a central locking device with remote control in a car:

• Save time. Instead of closing each door in turn, you need to close one - the rest are locked automatically.
• Versatility. The device is standard. There is no need to select a model.

A standard car lock kit consists of:

• Electric drive (five-wire).
• Central locking.
• Two-wire electric drives.
• Control controller.

The system is operated by a key or remote control.

• The system works with any type of alarm system.
• The remote control start button is placed on the key fob for convenience.
• If your car has an alarm system and a remote control, there is no point in ordering another one - it’s better to save money.
• In addition to the doors and hatch, you can also connect the trunk of the car. It can also be controlled by remote control.
• An important feature is the recoding of safety capabilities. For example, if the speed is exceeded, the doors are automatically locked. Or set the opening sequence: first the driver's side door, and when pressed again, the rest.

INSTALLATION

Installation of the structure begins with removing the trim from each door. But before that you need to disconnect all the terminals from the batteries. This will allow you to install the system without risk of electric shock. The following steps follow:

1. Remove the panels.
2. Select a location for installation. The best place is considered to be the lower left corner. Otherwise, there is a risk that the glass will interfere with the operation of the locks.
3. Install activators for the central locking.
4. Connect the rods and activators and secure the clamps. It is very important to check the wiring when connecting each device.
5. Pull the wires. Use plastic clamps to secure them.
6. Remove the dashboard. The same needs to be done with the old wires responsible for the operation of the power windows. Route new cables and connect them.
7. Connect the drives and insulate them.
8. Push the wires into the dashboard and glove compartment.
9. Install the through pipe.
10. Attach a fuse to the connector. This element must be connected to a common power supply. The resulting structure is mounted under the torpedo.
11. Connect the central locking system to the car. The minus goes to the body, and the plus is connected to the fuse.

After this, the installation of the central lock can be considered complete, as you can see, there is nothing complicated about it. It is not surprising that most drivers decide to do it themselves.

IMPORTANT NUANCES

When installing a central lock with your own hands, there are certain nuances that will help you do the job at the highest level. Here are the main ones:

• It is best to use a corrugated tube for pulling wires.
• Do not run wires along the bottom of the doors. This may cause a short circuit.
• To achieve better accuracy, the rod can be bent.

Just three recommendations will allow you to avoid common mistakes when installing a central lock with your own hands.

HOW TO INSTALL CENTRAL LOCKING WITH YOUR OWN HANDS

If you have long decided to upgrade your car by making closing and opening doors a fully automatic process, you will benefit from instructions on how to install central locking yourself.

PREPARATION

It all starts with preparation. To install the device, you will need at least four meters of two-core copper wire. Of course, you won’t be able to do without a tool chest either. In it you should have:

Only having this entire set will you be able to efficiently install the entire structure. Also, during the preparation process, do not forget to check that all the necessary components are included in the purchased kit.