Step-by-step instructions: how to open the back door in a Niva Chevrolet if the lock is broken

The production of the Chevrolet Niva all-wheel drive SUV began back in 2002. The car belongs to the middle price segment: affordable repair kits and unpretentiousness to fuel quality have made the vehicle in demand among buyers. Standard kits consist of a central lock complemented by an actuator for each door. The same part is responsible for blocking the mechanical pawls.

The article will tell you how to open the back door of a Niva Chevrolet if it is locked and what are the causes of the breakdown.

Design features

The back door, like the others, is connected to the central alarm unit . When the corresponding signal is received from the security system, the blocking from the structure is removed.

If it is not possible to open the door inside and out, the problem probably lies in the mechanical part . If you have problems with the trunk, it is recommended to take a closer look at the spring of the locking mechanism.

The winter season contributes to the accumulation of large amounts of liquid inside mechanisms , which freeze at subzero temperatures.

The following breakdowns appear in the mechanical part::

Deformation in the lock rod of Niva Chevrolet. The trunk door does not open in case of serious damage.
There is a malfunction in the pawl mechanism. The handle can turn, but the lock cannot be opened from the inside.

What causes the lock to stop working?

The problem practically bypasses Nivas operating in the city. But for those who often drive on country roads, the problem will be very familiar. In any case, they already know what to do, but this article was written for those who are encountering this for the first time.

First of all, this is dust that gets clogged under the door trim. During operation, dust accumulates and causes the lock mechanism to jam. As a result, the central locking does not work. But the larva will stop working first. Eventually, the lock stops locking with both the key and the key fob.

It is recommended to constantly check that the trunk door is closed before leaving the car. This malfunction occurs suddenly and many car owners have had their cars left open to thieves for years.

Broken lock rod

Incorrect assembly often causes the lock rod to bend . This also happens because dirt and water have gotten inside the door.

In some places, the protective polyethylene film peels off from the door frame . Which leads to dust getting inside. There are several places where it accumulates - at the bottom of the cavity, on the levers of the lock itself. Mixing with liquid makes the dust heavy and blocks the normal operation of the mechanisms. Any part can jam.

The rod bends due to the fact that the owner puts more and more effort into trying to open the door . After some time, the actuator simply does not have enough travel to make normal movements. In this case, even straightening the thrust no longer corrects the situation.

In this case, resort to the following solutions:

Removing the door card.
Repairing all rod damage.
Dismantling along with lubrication and cleaning of the lock from the inside.

The sooner this is done, the better , then serious damage will not appear.

Spring failure

If cracks and serious mechanical damage appear in the spring, there is a high probability that the lock will also fail . In such a situation, one of the levers that operates inside the machine is overloaded. The tendrils of the spring break off, after which the lever with which the clutch is organized becomes completely unpredictable.

Even complete blocking in this case does not protect the doors from opening while moving . Springs that were originally made from low quality material are more susceptible to defects. An incorrectly selected metal grade can also affect further operation. Even if it is only a passenger type of design.

Step-by-step repair of the mechanism is as follows:

The rear door trim is removed.
Study the settings.
Change or reinstall parts.

Replacing the larva

The rods are attached to hinges. If these elements fail, then purchasing them and installing them without the help of specialists will be quite problematic. In case of high wear of parts, the optimal solution is to replace the core. After removing the larva, the sequence of actions is as follows:

The internal cavity is treated with an anti-corrosion substance.
The new larva is lubricated with a special product.
The core is being installed.
The spring and washer are returned to their place.
The traction is being connected.
Electrical wires are connected. The nuts are screwed on.
The operation of the lock is checked.
The element is inserted into the handle. Fixed with fasteners.
The casing is put in place, the pistons are snapped into place.
Screws are used to connect the handle with the escutcheon.
The screws are closed with plugs.

Removing the lock on the rear door for repairs on a Chevrolet Niva

First, remove the outer panel, then move on to the internal contents . Before starting work, it is recommended to remove the negative terminal.

The master will need the following tools :

Clip cutter or wooden wedges. They are needed to unfasten the pistons.
Sets with clips.
Flat head screwdrivers with a wide tip.
Phillips screwdrivers. They have a standard handle.

First, flat screwdrivers are wrapped in rags. The tool is inserted under the door trim to free the pistons.

The work procedure is described as follows::

The back door opens.
The upper fasteners are unscrewed from the base. To do this, use a cross-shaped screwdriver.
The lower decorative plugs near the glass frame are also removed.
There are screws under the plugs; these also need to be unscrewed.
The plug for the rear window washer reservoir is also removed.
The same applies to the neck lining located under the plug. It's easy to break, so be careful.
The sharp slotted end of the screwdriver is wrapped in a soft cloth. For protection, you can also use regular electrical tape. The tool is inserted between the casing and the metal frame.
The screwdriver is carefully pulled towards you, after which the first piston is snapped off. Then you can easily get rid of the remaining pistons along the perimeter; all that remains is to dismantle the casing.
The screws at the end are unscrewed.
Disconnect the rods.
Pull out and disconnect the connectors of the electrical wire.

To disassemble the lock, first remove the three screws securing the cover . Then the tail of the metal base is unbent. Two clamps are simultaneously removed from the right end.

Repair work requires thorough cleaning of dirt and lubrication .

Unlocking the lock

As already mentioned, actuators are responsible for locking and unlocking. This is a reliable system that breaks down extremely rarely. But it also has a number of features. One of the doors quickly jams if the other was slightly open when the system was first blocked .

At the first stage, the cladding is dismantled; this is the most difficult step. The door panel is removable. After this, they carefully examine the door latch and see what condition it is in. You can pull the plastic tab towards the driver. Or move the latch in any direction. After this, unlocking should occur. There shouldn't be any problems outside.

The traction is broken.

Basically, the rod can bend if it was assembled incorrectly. The problem can also appear if the car is often used in off-road conditions and dirt gets into the cavity. This can happen if the plastic film peels off from the door frame. In this case, dust may accumulate inside it.

During movement, dust settles not only at the bottom of the cavity, but also on all components, including the levers. After the car gets caught in the rain or washed, all the dust turns into dirt, firmly settling on the insides. As it accumulates, it leads to a decrease in the lock stroke, and at the moment when the passenger tries to open the door, great efforts have to be made. Because of this, the rod begins to bend over time. And at some point its progress is not enough to unlock it. Even after it is straightened, the integrity of the system will already be compromised and components will need to be replaced.

In this situation, complete replacement of the door lock components, or dismantling, lubricating all components and cleaning the lock can help. This must be done as early as possible, even if the slightest problem arises, so that the Niva Chevrolet door handle does not become completely blocked.

The rear door device is quite simple and does not contain complex mechanisms. The lock used is the same as on most AvtoVAZ models. The only difference is that its locking and unlocking is actuated by an actuator. Sometimes they fail and then it becomes necessary to open them manually.

In this case, it is necessary to know the nuances of this system. If you activate the system at the moment when one of the doors is open for at least one click, this can lead to the other one jamming.

The window is Niva’s weak point

On many automobile forums dedicated to the Niva car, you can read information that their owners are periodically bothered by rear windows that randomly drop down. Of course, they do not open completely, but only a couple of centimeters, but sometimes this is quite enough.

If you delve into the design of the car, you will learn that the front windows are opened using an electric drive, but the rear windows are just the opposite - using a manual drive. This is their main weakness. When the rear windows shake well during a trip, they will definitely open a little.

When the car is just standing, you should constantly rock them up and down. Using similar maneuvers, we open the glass for ten to twenty minutes. During this time, as a rule, you will be able to move the glass down about ten centimeters, and this will allow you to stick your hand into the interior and lift the flag yourself. At this stage, you can finish the review of ways to open a Niva without a key, but we bring to your attention a few more interesting options:

using a tennis ball;
wires;
using a loop of regular rope.

Also interesting: Niva generator transfer bracket drawing

Details about each of these methods

Obviously, you can watch videos on the Internet where professional car enthusiasts perform these procedures, showing everything by their own example. However, it is also worth paying attention to such a moment as what to do so that such situations do not occur at all. After all, it is better that you always have a backup option. Why solve problems if they can be eliminated altogether?

Details about each of these methods

Spring failure.

Basically, the problem of lock failure lies in the fact that the tendrils of the spring break off, which loads the rear door lock lever. This occurs due to the use of low-quality steel in the production of the part or violations of operating conditions. In any case, such a breakdown leads to the fact that one of the lock levers begins to move in a random direction and it is impossible to predict whether the lock will open at the moment or not. There are even situations when the rear door lock of a Niva Chevrolet can open while driving. Therefore, you should not wait for unpleasant situations to arise and carry out repairs immediately if any problems arise with the lock.

Refinement of the base and mechanisms

If after installation the mechanism does not work correctly, then it is further processed and adjusted. If difficulty is felt when entering the key, then:

Additional lubrication of the elements or adjustment of the internal teeth will be required.
Spacers are installed between the cylinder and the lock body.
The spring is tightened.
The front part of the Euro-lock is cleaned or polished.
The quality of tightening of fasteners is checked.

The ease of sliding of the closing parts and the ease of operation of the key will indicate that the repair work was carried out correctly.

Castle repair.

Before starting repairs, the door trim on the Niva Chevrolet must be removed. The door card can be removed even after the door is completely locked.

After this, the window lifter handle is removed. To do this, use a flat-head screwdriver to bend it and pull the latch up.
The decorative cover of the handle is removed. It is held on by latches; to disconnect it, you only need to pull it towards yourself with force, after prying it off with a flat-head screwdriver.
The door card itself is held on pistons in the center, top and bottom of the door. They can also be snapped off by prying them off with a screwdriver.

Unlocking the lock.

To open a locked door, you need to pull the plastic tongue of the actuator. You can also move the lock latch itself. After it is unlocked, you can remove the lock, but you must disconnect the battery terminals. The lock itself is held in place with screws at the end.

After they are unscrewed, you need to use a screwdriver to disconnect the rods and disconnect the terminals. Then you can pull the lock out of the case. Once it is pulled out, it is much easier to carry out an external inspection to determine the exact cause of the problem. If in doubt, it is better to immediately replace the part with a new one that will definitely be in working order.

The Chevrolet Niva all-wheel drive SUV has been produced by GM-AvtoVAZ since 2002. The car belongs to the middle price segment and is in constant demand among drivers due to its unpretentiousness to fuel quality and affordable repair kits.

The Niva comes standard with central locking; each door has an actuator, which is responsible for blocking the mechanical pawl. In addition, the model is equipped with a mechanical locking device.

The trunk door lock is jammed.

Hello Drayvovites. Lately, I rarely make blog entries, and I drive my Shniva a little, so there’s not much to write about. For about a week there was trouble with the car; the trunk door lock began to jam, and it jammed at the most inopportune moment. Yesterday I decided to defeat him. Of course, I initially looked through online sources, and after reading them carefully, I realized that there was nothing complicated there.

In the morning, listening to music but without beer, I started poking around. Well, according to the instructions, I disconnected the battery, removed the casing, unscrewed the lock, and then all the fun began. It’s not difficult to unhook the rods that are attached to the handle and the fastening there is hinged, but somehow I couldn’t get to them (the fastening location is indicated by a red arrow in the figure below).

I did it my way. I unscrewed the handle, in the open position, moved it to the right (if you look from the side of the handle - from the outside, then to the left) in order to pull it out of its place, only then was it possible to disconnect these rods. Naturally, all the mechanisms were covered in dust, the dust lay in a very large layer. The blue arrow indicates the place where the rods are attached, and there they are disconnected.

I dismantled the lock itself. it was simply clogged with dust, you could even use a shovel to scoop out the dust. I don’t understand how it worked in this state. And the lock closed very tightly, I had to slam the door with force. I cleaned everything, raked out the dirt and started collecting. When assembling, be careful, the whole problem arises with the spring indicated by the green arrow (1), there is a video on assembling this mechanism on the internet, I used it as a tutorial. Initially I thought that the mic was simply clogged with dust, but unfortunately it turned out to be not in working order, the contact was dangling chaotically.

Interestingly, the mics are sold separately from the lock (indicated by a green arrow 2). I wanted the mechanism to work fully. but it’s not very good without trunk lighting. Shnivovoders, maybe someone from my fellow countrymen can tell me where I can buy them from us.

Source

Design features

The Niva's back door, like the others, is connected to the central alarm unit. The door opening process is controlled by an actuator. The equipment removes the lock when receiving a corresponding signal from the car’s security system.

In 90% of cases, when the door does not open either from the outside or from the inside, this indicates a breakdown of the mechanical part. If the trunk does not open, the problem may be a broken spring in the locking mechanism.

In winter, it sometimes happens that after washing the car, water remains in the rubber seals of the doorway, it quickly freezes and prevents it from opening. Car mechanics identify two main failures in the mechanical part of the lock:

deformation of the lock rod;
a malfunction of the latching pawl mechanism, when the handle turns, but the lock does not open from the inside.

Sim-sim, open up! Defeating the trunk door lock

Hi all!
For a very long time I drove with the trunk door not opening. But finally I got tired of loading through the cabin, and having found time, my friend and I decided to defeat the treacherous door after all. They removed the door trim from the inside and groped around to pick the lock. We didn’t know its structure (but now I’ll disassemble and assemble it with my eyes closed)))), everything was done using the scientific method. In general, it will be clearer in the photo. About the washer reservoir - a different story - www.drive2.ru/l/9053608/

It turned out that the problem was not in the reel, the tank was intact, but the slurry was leaking out because...

We put the hose up, now we need to buy a good “writer” and install it. I have some lying around, but it doesn't fit. They stuck it in temporarily, but now I can water the windshield behind a moving car))) (Have you ever seen on TV how tigers mark their territory - that’s how it splashes behind me)))))

In the process, the old pen was completely ruined, I drove it to the store and bought a new one (about 450 rubles). By the way, if anyone doesn’t know, the tailgate handle is identical to the driver’s door handle.

Source

Broken rod

The door lock drive rod on the Niva is a rigid rod made of stainless steel, or less commonly aluminum. The price of the part starts from 700 rubles. The rod is curved in a certain way and serves as an adapter between the door handle and the locking mechanism. The lock may not open for the following reasons:

incorrect assembly after repair or manufacturing defect;
dirt getting into the door cavity.

Incorrect assembly is a rare case, but it still happens sometimes. Dirt in the door cavity can form as a result of the protective polyethylene film peeling off from the frame. First, dust gets inside, and then, mixed with water during car washing or rain, it turns into dirt.

Gradually, dirt accumulates and begins to limit the movement of the levers. To open the door, you have to apply more and more force to the handle. This leads to the fact that the rod gradually begins to bend, which transmits this force to the lock levers. And it bends until the actuator has enough movement to unlock the door. In order to troubleshoot the problem, you must:

Remove the rear door trim.
Remove and straighten the rods.
Clean off dirt and lubricate the lock.

It is recommended to straighten the rod based on the car's operating instructions. During self-repair, the driver cannot determine the degree of deflection down to a millimeter, but by consulting the diagram, you can clearly calculate at what angle to bend the rod.

Principle of operation

The door lock device on the Chevrolet Niva is equipped with pins around the perimeter. The back and front teeth close the door when they come together and open when they diverge. If the right or left pin jams or breaks, the mechanism will lock. Without falling into the grooves, the internal fragments cannot complete their path, so a disconnective displacement occurs. The malfunction is caused by prolonged use and wear. The situation is aggravated by moisture ingress, burglary, and metal corrosion.

The first signs of a breakdown are a squeaking sound when turning the key. Only disassembly and inspection of the mechanism will reveal the cause of the malfunction. After diagnostics, it will be determined what exactly is required: repair or replacement. Sometimes it is enough to carry out lubrication work or replace the core of the part. In other situations, it is necessary to install the entire device. The average price of a Euro-lock is from 1,500 rubles, depending on the place of purchase.

Spring failure

The lock can jam from the inside if the spring of the traction mechanism, which is responsible for part of the work when opening, is cracked or significantly deformed.

In 30% of breakdowns, the cause of the malfunction is a spring that loads one of its levers. The spring tendrils break off and the lever to which they cling begins to behave completely unpredictably. It is possible that a locked door can unlock and open while moving. The cause of the spring defect: poor, low-quality steel or an incorrectly selected grade of metal. Repairing the mechanism step by step:

Remove the rear door trim.
Check the setting.
Replace the broken spring or reinstall the part if a broken spring is found.

Castle repair

Before you begin the repair, you must remove the outer panel that hides this lock. For any work, it is recommended to remove the negative terminal from the battery. For repairs you will need the following tools:

crosshead screwdriver;
flat-head screwdriver with wide tip;
set of clips;
a clip holder or wooden wedge for unfastening the pins.

Experienced locksmiths wrap a flat-head screwdriver in a rag when they unfasten the door pins and push the tool under the door trim. During work, half of the plastic caps on Niva fail. Before installing the casing, you must remove them from the panel and replace them with new ones.

Work order:

Open the back door.
Unscrew the top screws securing the decorative glass frame using a cross-head screwdriver.
Remove the lower decorative plugs of the glass frame.
Remove the cover by unscrewing the screws located under the plugs.
Unscrew and remove the cap of the rear window washer reservoir.
Remove the neck trim, which is located under the plug.
Wrap the sharp slotted end of the screwdriver with a rag or electrical tape and push it between the trim and the metal frame of the door.
Carefully pull the screwdriver towards you and unclip the first piston that secures the casing to the frame. Unclip the remaining pistons around the perimeter and remove the trim.
Unscrew the screws at the end of the lock block.
Disconnect the rods.
Pull out and disconnect the electrical wire connectors.

The procedure for disassembling the lock:

Unscrew the three screws that secure the cover.
Unbend the “tail” of the metal base of the lock, which holds the lid.
Pull two latches simultaneously from the right end of the case and remove the cover.

All repairs consist of cleaning from dirt, lubricating and replacing the spring.

Procedure for dismantling door trim

Instructions for removing the upholstery:

Use a knife to remove the plugs.
Unscrew the screws with a flat screwdriver.
Remove the cover.
Disable the latches.
Remove the side mirror adjustment lever.
Unfasten the top row of clips. Pull out the panel.
Disconnect the electrical wiring wires: speakers, power windows.
Remove the fasteners from the closing device body.
Remove the bottom row of pistons, after which you will have access to the rod.

Now you can diagnose, repair or replace parts. Reassembly is performed in a similar manner.

Screwdriver Set;
awl;
key to 8;
rags;
knife.

Use a knife to remove the plugs.
Unscrew the screws with a flat screwdriver.
Remove the cover.
Disable the latches.
Remove the side mirror adjustment lever.
Unfasten the top row of clips. Pull out the panel.
Disconnect the electrical wiring wires: speakers, power windows.
Remove the fasteners from the closing device body.
Remove the bottom row of pistons, after which you will have access to the rod.

At first glance, it may seem that dismantling the door trim is a rather complicated task, but having sufficient information, it becomes clear that this is not the case, you just need to be quite careful and be careful when carrying out such work.

In order to dismantle the casing, the following procedure must be followed:

In total, there are eight fixation bolts on one Niva Chevrolet door, and some of them are hidden behind decorative plugs.
The presence of all bolts is indicated by arrows.
First of all, it is necessary to dismantle the two plugs that are located at the door handle. It is most convenient to remove them using sharp and thin metal.
When the bolts underneath are unscrewed, remove the two open bolts located directly in the direction of the rack.
We unscrew three more fasteners from the bottom of the doors, they are also not closed by anything.
Lastly, we remove the bolt, which is located under the door handle. To do this, we pull it towards ourselves and unscrew it.
When nothing holds the upholstery, all that remains is to remove it from the “bugs”. To do this, we run a thick screwdriver around the perimeter of the door, pressing the edges a few centimeters, after which the door itself will easily move out of place.

Full size uncoupled Next, use a thin screwdriver to unhook the rod on the door soldier and take it out. We also pay attention to the lock actuator rod (red arrow) - it doesn’t interfere with disassembling, but during reassembly it will need to be put back as it was)

None To disassemble the lock, unscrew 3 self-tapping screws (the red arrow is a pin that comes out a bit tightly during disassembly).

Full size Remove the cover to the side Now you can pull out the microphone - here it is, the brat) By the way, the microphone is normally closed, when the doors are closed - the microphone bracket is pressed and the contacts open) We disassemble it with a thin screwdriver, but CAREFULLY - there are small parts inside!

Full size Giblets of the mikrik Using tweezers, carefully remove the “spring” and remove the “contact”

Full size Carbon deposits on the contact pad

Cleaned it out with a thin file.

Full size We put the tabs in place when assembling

3) The pull rods on the lock cylinder and on the outer handle are put on quite tightly. Smooth roads and working mikriks to everyone).

At the start of production, the Chevrolet Niva was very different from its predecessors. A modern interior, convenient arrangement of instruments on the panel and many other innovations greatly distinguished it and made it more comfortable. But the most important difference was the transformation of the body from a three-door to a five-door.

But any equipment is prone to breakdowns, so sometimes the Chevrolet Niva Niva door handle or another part responsible for the normal functioning of the door may fail. This creates many problems and reduces the usability of the car.