Why car doors won't close with central locking - diagnostics and repair

Door handles on modern Lada cars are quite reliable. However, there are cases when, in severe frost or when excessive force is used, the handle mechanism breaks and fails. In this case, it needs to be replaced. The reason for the replacement may also be the desire of the car owner to switch to the handles from the Luxury package, which are painted in the color of the body and are more pleasant to use. Regardless of your motivation, the work will be almost identical.

Before starting the work process, prepare the following tools: an “8” socket or an open-end wrench of a similar size, an extension, a ratchet, a Phillips and slotted screwdriver, plastic spatulas for working with interior plastic, penetrating lubricant in aerosols. Before starting work, disconnect the negative terminal from the battery to avoid a short circuit.

To replace the outer handle of the Lada Granta door opening, we will need to remove the door card to gain access to the inner nut securing the handle. On the front doors, unscrew the screws in the indicated places with a Phillips screwdriver, unscrew the plastic cover of the door lock button and, using a plastic spatula, unclip the door card from the body element. On the rear door, the fastening screws are located under the plastic cover of the door handle; by snapping it off we will gain access to them.

We advise you to use specialized spatulas for working with plastic; such a tool will avoid damage to the plastic and worsen the appearance of the car interior.

After the door card is released, disconnect the power wiring for the power window buttons, if your vehicle has them.

To remove the external rear door opening handles, you will need to use a socket with an “8” extension or an open-end wrench of a similar size to unscrew the two attachment points of the external door opening handle. One nut is on the inside of the door, the second bolt is on the outside.

Further actions will depend on the year of manufacture of the car. If you have a Lada Granta Liftback, or a Lada Granta Sedan / Lada Kalina released later than the fall of 2014, then in your case a rod is used in the rear door opening drive. You will need to additionally release the metal rod retainer from the door lock. If you have a car manufactured earlier than the fall of 2014, then no additional actions will be required.

After releasing the fastening points, we move the handle in the direction of travel of the car and, simulating the opening of the outer door handle, rocking it, remove it from its seat.

Considering that since 2014 AvtoVAZ has changed the type of rear door lock drive from the external opening handle, it is possible that the mechanism on the handle does not correspond to the lock mechanism. If this happens in your case, you will need to move the door lock drive from the old handle to the new one. To do this, you will need to loosen the tension of the return spring and knock out the pin holding the drive. Use a slotted screwdriver to pry up the edge of the return spring and remove it from the seat.

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.

Repair of electric central locking

Over time, central locking solenoids do not tolerate low temperatures well due to high humidity, especially in spring and autumn. First they begin to jam, and then the door no longer closes or opens. The solenoids can be cleaned and lubricated, but it is better to replace them with motorized drives.

Electric central locking drive

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

1. Damage to the circuit or poor-quality contacts in the electrical wiring.
2. Relay is faulty.
3. If control is carried out from the board, then it is possible that the reason is its malfunction.
4. Poor contact at device terminals or damage to the drive electrical circuit.
5. Wear of activator components.
6. The winding has burned out.

Repairing a car's central locking system should begin by checking the non-working activators to see if they are receiving voltage. If the door lock function is activated, there should be voltage on one wire. If a signal to open is received, voltage leaves the 1st wire and appears on the 2nd. Based on the results obtained, further actions are performed: either the activator is checked and repaired in case of a malfunction, or the entire circuit is checked, correcting damaged areas. Broken wires most often occur in corrugated areas.

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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.

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.

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:

Ideas for rear door locks

There are new and old style locks.
In general, this is not news. The question is that they differ essentially in one lever. The idea is to bend that same lever (the metal is relatively soft and can be bent, and even turn up one corner and create some kind of reinforcement) and drill a hole closer to the edge for traction.

Since the length of the lever will be about 5 mm or more shorter, the rod can be bent within reasonable limits. But in the end, there are doubts about the force applied (on the handle) through the shortened (curved) rod and shorter lever (the approximate position of the hole of the new model lever is marked in red). I assume that it will be comparable to what it was initially. With the handle (offal 2123) everything is clear - repair kit or disassembly. Although, judging by the photo

(taken from Drive2 from friend damir4ik163rus), even factory locks have levers of different lengths (apparently, the manufacturers are different) and the length differs by 1-3 mm exactly. Let me make a reservation right away, the question is not that you are sorry for the money, but that this is just a thought - why buy this if in fact everything is there, but in fact the problem is only in one lever, because of which you have to change the lock assembly. Your opinions.

Source

Adjusting the front left (right) door lock on the Lada Granta

In the process of systematic use of the door, its frequent opening and closing, the lock and adjacent elements wear out. As a result, the door closes with a distinct knocking sound.

Often knocking occurs after an accident due to changes in body geometry. The functionality of the lock can be restored by partially repairing it, and in case of deformation, by completely replacing it with a new one.

Sequencing

1. We inspect the gaps around the entire perimeter of the door. We mark areas with deviations. The factory standard is 2–3 mm, anything higher or lower is a defect.
2. Using a screwdriver, unscrew the screws securing the hinge to the body. If necessary, use an impact screwdriver.
3. Move the hinge a few millimeters up and down and check the tight fit of the door to the body. If you hear a rumble when closing, lower the hinge; if you hear a dull knock, raise it.
4. We carry out a control measurement and tighten the bolts.

By analogy, we adjust the lock on the opposite side.

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.

Let's open the passenger door - no damage

None of the car owners are immune from the problem when the passenger door of the car does not open. In such a situation, it is not recommended to try to open it yourself. Any unqualified actions can lead to permanent breakdown and blocking of the locking mechanism, as well as to serious damage to the door and paintwork of the car. If the rear right door or front left door does not open, it is recommended to call a technician.

Why won't the back or front door open?

How to open the back door in a car or the front door?

In situations where the back door does not open from the inside or the front door from the outside, and there is no time to wait for a specialist, you can try the following steps:

If none of these methods help, it is recommended to contact a specialist. He will arrive within 15 minutes and, using a set of professional tools, will open it without damage. The doors and locks of the car will remain intact and in working order. The master has more than 5 years of experience, so all work is done carefully.

Has the back or front door stopped opening? Call us or leave a request on the website!

dbosch

New member

The passenger front door on the right side does not open from the outside or inside the cabin.

Question! How to remove trim on a closed door? Or is it possible to open the door in any way?

Brutus

Eugene_

dbosch

Installation instructions

Installation of the device is carried out as follows:

1. First, the plastic door trim is removed and a location for installing the unit is selected. When choosing a location, it is necessary to take into account the location of the window lifter elements. According to many experts, it is better to install the system in the lower left corner of the door.

• The next step is to install the lock activators, each of which is mounted separately on each door. It is necessary to drill the corresponding holes in the structure in advance and secure them with self-tapping screws. After this, the activator must be connected to the rod. Next, the activators need to install clamps on the manual control elements of the central locking.
• The wiring is being laid - All wires must be securely fixed; plastic clamps can be used for this. They should not be placed at the bottom of the door, since moisture usually collects in this place, so it is better to choose a place between the door and the body, installing a rubber tube here in advance. Thanks to it, the wiring can be protected from damage.
• The next step will be to dismantle the control panel. Having done this, the old wiring from the window regulators can be removed and a new one can be laid, which is subsequently connected to the drive.
• After this, the activator drives are connected. When all these steps are completed, the wiring must be pushed under the control panel on one side, and into the glove box on the other side. A pass-through pipe is mounted into the rack; a screwdriver may be required to install it.
• Now a fuse is connected to the connector and this circuit is connected to the central locking power supply, the entire structure is installed under the center console. The cable from the central locking system must be connected to the on-board network, plus to the fuse, minus to the body. Assembly is carried out in reverse order.

Sequence of actions when replacing the front door handle on a Lada Grant

1. We place the car within the perimeter of the repair area and provide priority safety measures.
2. Open the front driver's door and raise the window to the top position.

1. Unscrew the three screws that secure the upholstery at the bottom.

1. We carry out dismantling on the right side by analogy.

1. We unscrew the little soldier - the door lock lever.

1. Use a screwdriver to pry off the plastic plug.

1. Additionally, we unscrew the screw that secures the upholstery in the middle part of the door card.

1. We unscrew the screws in the armrest niche.

1. Unscrew the handle fastening (two self-tapping screws).
2. We insert a flat-head screwdriver between the metal body and the plastic upholstery.
3. Squeeze out the plastic.
4. We remove the card from the seat.

1. Disconnect the block with wires from the locking lever.

1. By analogy, we disconnect the contacts from the electric window drive.

1. We remove the upholstery.

1. Use a screwdriver to pry up the power window control unit and remove the switches.

Let's proceed to the second stage: dismantling the side view mirror

1. Using a screwdriver, unscrew the three screws that secure the mirror frame to the body.

1. Using pliers, remove the locking bracket.

1. We remove the mirror and remove the hinges through the diagnostic hole.

1. Using an “8” socket, unscrew the bolt that secures the outer handle to the end of the door.
2. In the inner tunnel, unscrew the second bolt holding the handle.
3. Using a screwdriver, carefully pry up and remove the rods from the lock.
4. We remove the handle from its seat, turning it slightly from side to side.

Front door lock device of Lada Granta

In conclusion, we carry out troubleshooting, inspect adjacent parts and mechanisms, and replace them with new ones as necessary. Replacing the front door handle on the Lada Grant is completed.

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.

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.