The standard alarm on the Priora does not work

Every Lada Priora buyer is twice lucky. The first time is when he becomes the proud owner of a modern Russian-made car. The second time is when he realizes that along with the car he also got a very good and reliable alarm system. He learned about this already in the salon during a demonstration of the possibilities of purchasing upon receipt.

The local manager activated the immobilizer and gave a brief overview of the standard alarm system of the Lada Priora. In the eyes of a new car owner, delight and bewilderment are possible. He had already purchased a new alarm system in advance and was mentally considering options for its use. Here you can’t do without advice from setup experts.

Principle of operation

The principle of operation of the standard Priora alarm, like any other, with reliable dynamic coding, is quite simple and understandable. The activated signaling system accepts for execution exclusively the commands of the native, trained chip installed in the ignition key of the Lada Priora. This will be followed by a series of logically related actions:

the communication coil, having received a reliable encoded signal from the ignition key chip, forwards it to the standard immobilizer (IMMO) of the Lada;
he, in turn, checks the received reliable, encoded signal with the code recorded in his memory;
if they match, the immobilizer sends a command to the authorized engine start of the Priora ECU;
The Lada ECU, having received a signal from the IMMO alarm, unlocks its electrical circuits;
If there is an unauthorized attempt to start the Priora engine, the IMMO will not send a confirmation signal to the ECU and the control circuits will not be unlocked. In addition, a siren warning signal with light flashes will sound;
in addition, the car key fob, built into the chipped ignition key, controls the central locking of the Lada Priora and its window lifts;
By installing shock or volume sensors yourself, the alarm system receives an additional option to increase its reliability.

Important: be sure to require activation of the standard Priora alarm system when purchasing it. Otherwise, you will have to configure it yourself using a training key with a red insert. In this case, various nuances with its performance are possible.

Operating principle of the immobilizer

The principle of immo operation is that while the engine is turned off, the ignition system is blocked, and when the key is inserted into the lock, it begins its work. One of the main elements of the immobilizer device - the antenna - uses an adapter to recognize the signal from the chip inside the key fob. If there is no key fob with a chip, the immo antenna will not receive the signal and the system will not work. After recognizing the key installed in the ignition switch, a positive signal is sent from the ECU to unlock the ignition system. The anti-theft system is completed within seconds and the vehicle is ready to start.

Protection functions and operational reliability

The standard Priora alarm system is not overloaded with additional functions. It does not have access to service options related to auto start, opening the trunk, or searching for a car in a parking lot. It will not inform its owner based on the indication from the key fob about the loss of communication with him. And even more so, it will not send all kinds of SMS messages about various machine malfunctions. Let the owners of Bugatti Veyron and Porsche 918 use GSM communication and GPS navigation services.

It is absolutely not worth using a gas adjustable wrench No. 3 as a torque gauge. The standard Lada car alarms have a different task. They don’t need to amaze the Priora owner’s colleagues with the ergonomics of the control key fob or autostart from a neighboring village. Their advantage is reliability and ease of setup without additional hassle and the involvement of related specialists. In addition, during its operation, the standard alarm system ensures the safety of specific areas of the machine:

doors of a protected vehicle;
car hood or trunk door;
driver's door with lock cylinder;
voltage at the terminals of the standard battery.

Lada Priora will give a fairly reliable alarm signal and will accompany it with flashes of turn signals when attempting to violate any of the zones protected by the standard alarm system. Such unauthorized access attempts include:

desire to open any of the car doors, including the trunk or hood;
turning an untrained key in the ignition lock of the Lada;
any manipulations with the standard battery related to its connection or disconnection;
when an additionally configured volume or shock sensor is triggered.

Important: if cases of incorrect operation of the car’s standard alarm system occur, you should first of all check the serviceability of the control key fob.

Why are there false positives?

If the alarm goes off on its own, then this phenomenon is understandable. Some causes can even be eliminated on your own, but only if the security device is in perfect order and its components are not damaged. Causes of false alarms include an overly sensitive security system, a malfunctioning limit switch, and high humidity. These are the main reasons, but there are others. Thus, during the installation process, specialists or car owners themselves violate the technical installation requirements. Often the operating requirements simply do not correspond to the technical capabilities of the device.

Another popular reason is poor-quality or untimely car alarm repairs. The siren will turn on for no apparent reason if there are changes in the supply voltage. Wind is also often one of the culprits of false alarms.

How to set it up correctly

Control of the configured functions of the standard alarm is possible only after the process of its activation. The activation process itself is quite understandable and simple. It is described in detail in the technical documentation supplied with the car. However, it is much more reliable if this process is carried out directly in the salon by its employees.

If random failures occur due to a low battery, frost or other reasons, you can retrain the standard Priora alarm system yourself:

charge the standard battery and check the presence of fuel in the tank of the car. All doors, including the trunk and hood, must be closed;
insert the training key into the ignition lock cylinder;
turn on for 6 seconds. Priora ignition;
the standard immobilizer indicator lamp should blink at a frequency of 5 times/sec;
after 6 seconds. The Lada ignition must be turned off and the training key must be removed;
While the standard IMMO indication is on, insert the working key with the control key fob integrated into it;
Set the ignition key to the on position. Then the standard alarm will emit 3 confirming signals. After waiting for the next 2 signals, the key with the control key fob integrated into it can be pulled out by turning off the ignition;
if it is necessary to train a second standard key with a control key fob integrated into it, then the previous paragraph should be repeated for it;
in 6 seconds, when the indication is flashing, you need to insert the training key and restart the ignition of the Lada Priora;
The standard alarm will produce 3 clearly audible sounds. Then, within 6 seconds, it will make 2 more sounds;
turn off the car ignition and wait for the last single signal. The IMMO indicator lamp should flash 2 times faster;
at this time it is necessary to set the training key to the on position. for exactly 3 seconds. Wait for the buzzer to sound three times. The standard IMMO indicator lamp should stop flashing quickly;
Do not turn on the ignition for 10 seconds;
It is possible that the ECU will not allow the Lada Priora engine to start the first time. In this case, you should desynchronize it by turning on the ignition for 6 seconds.

Important: if an error occurs, the entire process of learning the standard alarm and working keys with control key fobs integrated into them will have to be repeated again.

Sensitivity of car security equipment

If the equipment on the car has not been installed for so long, then the sensitive shock sensor becomes the reason why the alarm on the car goes off for no reason. The culprit is its incorrect adjustment. The element is set to a sensitivity level that is too high. And if the area where the car owner lives and constantly parks his car is quite quiet, then excessive sensitivity is not a terrible problem. But if there is a highway near the parking lot, a place where young people like to gather, a construction site, an airport or some other similar object, then the shock sensor will respond to any loud sounds by turning on the siren.

This problem can be corrected by simply reducing the susceptibility or sensitivity of the shock sensor.

Key fob and its functions

The control key fob is an ergonomic, 3-button chip key without an display panel. It does not have the ability to provide interactive support for the basic alarm control functions. The main task of the key fob is to reliably transmit a control signal without monitoring its execution. Functionally it looks like this:

there are 3 control buttons on the key fob;

right, front control button of key fob No. 1 – unlocking the Lada Priora car alarm;
left, front control button of key fob No. 2 – unlocking the hood or trunk;
central, rear control button of key fob No. 3 – activation of the car security function;

Reliability level

Undoubtedly, the standard alarm system installed and configured on the Lada Priora is simple, reliable and fully adapted to difficult local weather conditions. Properly activated, it leaves no doubt about its functionality. Besides:

the quality of installation and configuration of factory alarms is guaranteed by experienced factory specialists and the control service of the enterprise;

The key fob is integrated into the regular ignition key. There is no need to wear them separately in a whole bunch;

there is no need to equip standardly installed equipment with anything;

The factory alarm system of the Lada Priora is covered by the factory warranty;

if the Lada owner wishes to install and configure an additional sensor, there is a spare port;

Unfortunately, if the factory, standard installation is a big plus of such an alarm, then at the same time it is also a significant minus. Thousands of analogues of such alarms drive Lada Prioras across the vast expanses of the country. No mystery for attackers. But they are not looking for cars with alarms, but without them at all. You also need to understand these immobilizers, and time is money. And unnecessary problems are not for the criminal business.

How to protect your car from theft? The simplest and most modern way to do this is to buy and install an alarm system. If you are still looking for a suitable “iron horse”, you can go another way - purchase a Lux modification of the Lada Priora car. Unlike other models, it is equipped with an anti-theft system straight from the factory. However, very protracted debates about its reliability continue today. Many car enthusiasts complain that it does not function normally and are looking for solutions to the problem. In this article we will look at the most common reasons why the standard alarm system on the Lada Priora does not work, and we will also offer a number of recommendations for troubleshooting.

For M-73 the process will look simpler:

Installing the OpenBox program and the HxD file editor on your computer. Connecting the immobilizer to the computer via an adapter, the standard EEPROM code is read. The code is saved. Open the saved code in a file editor and add the first line with the text: FFFFFFFFFF. Save changes. But such a file can be searched on the Internet. Load the edited code into the immo memory through the program. Disconnect the module and install it in the car. Disabling the immobilizer using a crawler

It is easier to disable the immobilizer on a Priora yourself using a device - an immobilizer crawler for a Priora (most often they are produced by Starline). To do this you need:

Find and disassemble the immobilizer unit in the Priora. Before disconnecting from the network, connect to the computer via an adapter. Resolder the resistor chip to modify the blocker control module. Run Eeprom and Flash diagnostics, save existing versions. Install the “untrained” program in place of the old one. Solder the resistor chip. Deactivate the anti-theft system. To do this, you can change the ignition switch in the Priora to “update” the immobilizer. It’s just that the immobilizer training key will not be used in the future. Disabling the immobilizer without using a crawler

These methods have already been described and they are more reliable because they completely change the firmware of the device and provide a guarantee that the immobilizer will no longer break and will not leave the car owner in the cold. Using a waste module may be an innovative way, but it only masks the problem, not eradicates it.

The standard alarm system on the Lada Priora consists of the following links:

Control unit – connected to the glass unit control system;
Communication coil – installed in the ignition switch;
Main and demonstrative keys, which are equipped with a buzzer and contact keys;
Central key on the dashboard;
The control unit is located on the right side of the brake pedal. It has several connection points.

Anti-theft system activation procedure

The main advantage of a standard alarm system is that your car is protected with it immediately after purchase.

But if we talk specifically about the Lada Priora, its lucky owners face some difficulties. The first, and most common one, is that the anti-theft system is not activated at the factory. And, of course, it won't work. To eliminate this problem, you must immediately perform the following steps after purchasing the car:

fill the car. This will help in the future not to confuse the anti-theft system signal with the audible indication of fuel shortage and will greatly facilitate the activation procedure;
insert the training key, which comes as standard equipment, into the lock and at the same time turn on the ignition;
remove the key and insert it back after a few minutes. Restart the ignition using the training key, not the working key;
After five beeps, turn off and start the engine again. After this, you will hear three more beeps, indicating that the anti-theft system is activated. All that remains is to synchronize the immobilizer and fully use the alarm system.

For M-74, the process of turning off the immobilizer will look like this:

Disconnect the battery, disconnect the immobilizer control unit from the network. A harness with cables and a double switch is connected to the immobilizer. The circuit is connected to the battery and computer using a VAG-COM adapter. The first button of the switch is activated, it “gives the go-ahead” to change the code. The code is changed in the WinFlash program. First of all, in the settings you select the module type and the information transfer speed parameter. The second switch button is activated; it is responsible for communication between the computer and the immo control unit. The standard lock code is retained, and the Eeprom cell data is overwritten. The whole process takes a long time, but you need to wait for contact. Upon completion of the recording process, the control unit is connected back to the vehicle network, and the battery is started.

Common malfunctions of the standard anti-theft system of the Lada Priora

If the alarm does not work after activation, then it is necessary to carry out detailed diagnostics. It allows you to identify the following problems:

weak contact in the ignition key. You can easily detect this problem if the two-way alarm system works normally, but the standard one does not start. To eliminate it, you need to remove dust and dirt from the surface of the contacts, carefully clean them, or simply replace the key if all such actions have no effect;
The radio module does not make contact with the corresponding conductive track of the printed circuit board. The solution to the problem is to restore contact by soldering or replacing the key;
The board is damaged. In this case, only replacement will help. In the future, it is better not to drop the key on a hard surface, and also not to tighten the screw too tightly after disassembling and assembling the device;
Resynchronization of codes, due to which even a fully functional anti-theft system will not work. The solution is to use the training key to fix the problem;
moisture penetration into the sensor installed under the hood. This device can be dried, but if after that it does not work, it is better to replace it;
there is no contact on the trunk release button or on the front and rear door limit switches;
problems with the central locking of the Lada Priora.

As practice shows, the majority of problems are associated with the remote control of the anti-theft system, which is located on the ignition key. To extend its service life, you must handle the device very carefully, avoiding strong impacts or pressure. As a result of mechanical impact, contact on the button may be lost. The printed circuit board is also often damaged, which is expensive to replace.

Sensitively responding to market demands, automakers have created a special anti-theft system that is installed on the car directly on the assembly line. The Priora's security is asleep until it is activated by the owner. This is an immobilizer, or as it was called even more simply - an immobilizer, a standard alarm system of modern cars.

Signs of a faulty factory security system

the car does not start;
the electronic control unit does not respond in any way to pressing the key fob;
the system does not work when hitting the surface of the body;
constantly activated for no apparent reason;
the doors are locked after pressing the open button.

Malfunctions are often associated with the design of the standard security system. Owners of domestic vehicles note that after several years of operation, the starter does not activate when trying to start the engine, or turns off after a few revolutions.

If one of the problems occurs, turn off the device, then contact the installers to diagnose and determine the cause of the problem. Before contacting the service center, test the system yourself, following the sequence of measures.

Priora standard alarm or immobilizer

In order to prevent car buyers from tampering with the elements of the car system, they did not install anti-theft alarm systems from third-party manufacturers, and developed a standard alarm system - an immobilizer. This system differs from all other types of security alarms in that it interacts directly with the Electronic Engine Control Unit (ECM) of a modern car. When a car leaves the factory, this computer, the electronic control unit (ECU), contains a special EEPROM security file. Only a coded signal from the APS unit (automotive anti-theft system) can turn it on. She sends this signal only after the activation procedure. After this, when activated, it becomes a full-fledged automobile anti-theft system.

Causes of immobilizer malfunction

Sometimes the immobilizer of VAZ cars breaks down, and the driver cannot go anywhere in the car. Immo malfunction can occur for a number of reasons:

Battery completely discharged;
Technical difficulites;
Software problems.

The worst way to kill an immo is to completely discharge the battery or simply disconnect the battery from the car's power supply. De-energizing the network will result in a chaotic code being written to the EEPROM circuit in the ECU, all settings will be lost, and the immobilizer will block engine operation.

Technical problems are problems with the boards, immobilizer antenna, or its adapter. The most common failure is a “burnt” board. You can accurately determine which part has failed using the anti-theft device diagnostics. It is important to monitor the immobilizer fuse in the Priora, because it serves as a consumable element in the overall chain. Exactly also a breakdown of electrical equipment can adversely affect the operation of the immobilizer. The problem may occur after replacing the engine or electronic control unit. When replacing the engine, it is worth installing a new ECU and a new immo chip.

Software problems are failures of the code recorded by a specialist. They can occur in EEPROM cells or the alarm key fob chip. If the operation of the ECU chip can be corrected using a computer, adapter and equipment, then the key fob chip will have to be changed. There have been cases of blocking due to interference from smartphones and other mobile devices.

What does the standard Priora alarm system consist of?

Any standard anti-theft system consists of several elements, it includes:

training key;
key fob;
signal receiver antenna;
APS block;
lock activators;
sound signal;
EEPROM section in the ECU.

Training key (transponder)

The key set includes two ignition keys. One of them is the so-called educational one. It has a built-in special semiconductor chip with characteristic magnetic radiation. It is inserted into a special recess in the end part of the key, closed with a red decorative cover. Because of this, such a key is sometimes called a red key. This element is necessary to activate the standard anti-theft system. And for using the car if the anti-theft is not activated.

Activation of standard alarm

When leaving the factory, the car anti-theft system installed by the manufacturer can be said to be asleep. In order to “wake up” it, or more correctly, activate it, you need to go through a special procedure for activating the standard alarm. This can best be done, of course, by a specialist at a service center. But in principle, this procedure is available to the owner of the Priora himself. You just need to write down the action algorithm on a piece of paper, prepare two keys, a training key and a key fob, get behind the wheel with all the doors tightly closed, and carry out the operation strictly step by step.

Use the red learning key to turn on the ignition for 6 seconds and then turn it off.
The warning lamp in the form of a key on the instrument panel begins to blink rapidly, about 5 times per second. It will flash all the time during the learning process. If the lamp stops flashing before the end of the process, it means an error has occurred and you need to start again.
Before 6 seconds have passed, with the ignition off, remove the red key and insert the immobilizer key fob.
Turn them on the ignition. If everything is in order, the panel buzzer will give 3 signals at once.
Wait another 6 seconds with the ignition on. The buzzer should croak 2 more times in a row, and you can turn off the ignition. Wait until the light on the panel goes out without removing the key from the lock.

You can get out of the car, close the door and press the close button on the key fob. The sound signal should sound, the car's headlights will flash several times, and the central locking will click. That's it, the car is under guard. You must remember that if the light goes out before activation is completed or there are no sound signals, you need to start over or contact a service center.

High humidity

During the rainy season, most cars are kept awake for this reason. Sometimes the alarm goes off on its own even after visiting a car wash. Water gets into the engine compartment and the alarm system croaks or howls. There is nothing better than simply turning off the security equipment until all electronics are dry. If the system operates autonomously, then a special key is required to turn it off. If the alarm siren is dependent, then to turn off the alarm, simply disconnect the wires from it. Some modern devices have a cabin volume sensor. If the owner left something large in size inside the car, this item may be one of the reasons for a false alarm.

It's not just humidity that can cause false alarms. Often in winter, old alarms go off on their own at night. Here the problem should be looked for in the device itself. There may be a problem with the wiring somewhere or the device needs repair.

How to turn off the standard alarm

It is very important to know that if the factory anti-theft is activated, it is simply impossible to disable it yourself. The file, having revived, will no longer fall asleep. The only civilized way to deactivate an armed and trained alarm is to remove the ECU from the car and either replace it with a new one that is not trained, which is very expensive, or give it to specialists for reprogramming. It is many times cheaper and more reliable. There is also a popular way to “deceive” a trained unit - when the chip is removed from the training key and taped with tape at the base of the ignition switch. However, it is worth remembering that this is a rather clumsy and risky method. The risk of failure of the Priora standard alarm program increases and, accordingly, there is a danger of its unauthorized activation at the most inopportune moment. Therefore, if it is activated, then it is better to use it, especially since user reviews about it are very good.

In the video you can watch the training process of APS “Priors”, “Kalina” or “Grants”, with two working keys:

Summary

These are the most common reasons - all car owners face them.

These problems have been discussed more than once in numerous automotive forums. To prevent this from happening, experts recommend not purchasing cheap products from China. It is better to purchase a reliable device from trusted manufacturers. Then you won’t have to rack your brains about why the car alarm goes off for no reason.