DIY immobilizer repair

In detail: do-it-yourself immobilizer repair from a real master for the site my.housecope.com.

The immobilizer is a standard vehicle security system or part of an installed alternative anti-theft complex. Despite its positive qualities, it is often necessary to bypass this security block. This can be done by installing the factory model, or by making an immobilizer crawler with your own hands.

The principle of operation of the anti-theft system is to block the possibility of starting the engine if certain conditions are not met. This may be necessary in the event of a key loss, incompatibility of the standard alarm and the optionally installed one for remote or automatic engine start. Factory immobilizer bypass devices not only serve their intended purpose, but also have a CAN bus to increase functionality.

But is it possible and how to cheat the immobilizer without buying a factory crawler? This task is accomplished in several ways. The main condition is to preserve the original functions of the car alarm. Installing additional components or upgrading the system should not affect its functionality and reliability.

To choose the optimal scheme for a homemade crawler, you need to know the types of immobilizers. They differ in the principle of operation, on the basis of which methods of temporary or permanent shutdown are developed:

RFID. Most often they are installed on cars of European and Asian production. Inside the ignition key is a transponder (transmitter) that, when activated, sends a signal to the system and activates it. The receiving part is located in the construction of the ignition lock;
VAT. Typical for American-made models. There is a resistor inside the ignition key that has a certain resistance value. To turn on the engine, you must insert the key into the lock. If the resistance value differs from the normalized value, the engine will not start.

For each of the systems, it is necessary to develop a universal model of the immobilizer crawler, which is not difficult to do with your own hands. It is important to know the principles of design and selection of components.

The presence of a standard immobilizer is the main reason for using additional means to bypass it. It cannot be deleted and therefore it is necessary to correctly think over the scheme of the future crawler.

Video (click to play).

During the drawing up of the scheme, the following conditions must be met:

Versatility of connection and no negative impact on the operation of car alarms;
Adaptation for a specific immobilizer model. Its device must be preliminarily studied;
Saving the action of the standard keys for starting the ignition.

Standard immobilizer models can be installed in the ignition switch or on the engine start keys. It is there that the modernization of the system is carried out.

The most common way to bypass an immobilizer with a DIY device is to install an additional circuit on the ignition switch. In this case, the remote functions of the immobilizer will be preserved. Its action will be disabled when the key is inserted into the ignition switch.

To make a loop on a coil, it is necessary to prepare a thin case, which will subsequently be mounted on a lock. Most often it is made from cardboard. Then you should follow these steps.

Check the inside diameter of the crawler. It should be slightly larger than the lock core.
Scotch tape or electrical tape is installed on the outer part of the mandrel. Its sticky part is outside.
Then one coil of the automotive relay should be disassembled. The wire from there is wound onto the winding. The number of turns is usually 20-30 pcs.
The resulting structure is installed on top of the ignition switch.

A similar design must be made for the spare key. He subsequently hides in the car. The components are connected in the system as follows:

In some cases, this method is not applicable due to the small space for mounting the immobilizer crawler. Then you need to use alternative methods.

To begin with, a relay is made, consisting of five contacts. It is necessary for the structure to work properly.

In the state shown, contact "30" is closed with "87A". When 12 V voltage is applied to the relay (contacts "86" and "85"), "30" will switch from "87A" to "87". Thus, the crawler will work according to the above technology.

But if it is impossible to install a loop on the ignition switch, the circuit should be upgraded.

In this case, there is no need to install the hinge on the lock body. The connection is made to the installed immobilizer. The assembly of such a structure is carried out according to the following scheme.

We cut one of the contacts of the standard antenna.
The voltage is supplied from the ignition switch "+", it is connected to the contact "86". The "-" connection is made from the car alarm to contact "85".
We install a diode between the received connections: the anode to "86" and the cathode to "85" contacts. This minimizes the likelihood of failure of the transistor in the signaling due to the effect of reverse voltage.
A wire from the antenna is soldered to the contact "87A". One of the ends of the crawler with a key is connected to the same place.
The second end of the crawler antenna is soldered to the "87" contact.
A wire from a standard antenna is attached to "30".

Thus, the supply of "-" to the car alarm occurs only during auto start.

When starting with a key, power is not supplied to the homemade relay. Therefore, the work of the standard immobilizer is not disturbed.

In addition to the above-described crawler design principle, more complex ones can be applied.

They almost completely eliminate the likelihood of spontaneous engine shutdown when switching from auto start of the car to the ignition key.

It is somewhat easier to make a do-it-yourself immobilizer crawler for VAT-type models. To do this, you need to accurately measure the resistance value of the resistor built into the key. If the key has been lost for some reason, it is imperative to restore it.

On average, the value of the resistance of the resistor can be from 400 to 11800 ohms. After determining the exact result, you should select a similar component with the same parameter.

The essence of the system modernization is that the key resistance function will be built into the immobilizer. Before installation, the scheme of the standard car alarm is studied. To determine the exact location of the resistance installation, you can use the general connection diagram.

After simple manipulations during autostart of the car or turning on with the key, the immobilizer functions will be inactive. However, it is worth remembering that such a technique can negatively affect the operation of the burglar alarm.

As an alternative, experts propose the installation of an additional immobilizer, which will make it possible to carry out a remote start. At the same time, the device will block this function while the car is moving.

The main requirement for the construction of the walker is to maintain the security functions of the alarm system. Therefore, the duplicate ignition key required to implement the RFID scheme should be carefully hidden in the vehicle interior. Improving the usability cannot adversely affect safety.

As an example, you can watch a video about making a crawler yourself:

It would seem that what is easier - to take and replace the battery in the alarm key fob. The owner himself will be able to perform this action without errors. Only now, after the replacement, the connection between the key fobs and the signaling is somehow lost. In fact, there is a loss of synchronization, and the consequences of this "loss" can be corrected according to the text of the manual supplied by the manufacturer. Here it is considered what actions should not be allowed when repairing car alarms, as well as immobilizers and key fobs.

A key fob with feedback, or the so-called pager, contains several elements in its design. The display is connected to the printed circuit board via a ribbon cable. But it is difficult to solder this part (loop) in practice. This is precisely why the replacement operation has an increased cost.

Nevertheless, you can do this replacement yourself. What is proven in the video.

Having disassembled and opened the plastic case, you will notice an important detail covered with a metal shell. The cylinder is a watch quartz, and you need something similar.

Let's say the pager display shows that there is no connection. In this case, the repair of the alarm key fob is done as follows:

Solder the junction with the antenna, perform assembly, check;
If the defect remains, change the main quartz.

In general, the repair of car alarm key fobs does not involve searching for defects using special equipment. More often they are guided by logic, changing "suspicious" nodes and details. They also strive to eliminate mechanical defects: they replace button modules, restore contacts. The main thing is to remove all power supply elements before soldering. And wait 20 seconds.

Do-it-yourself keychain repair is a painstaking and difficult job. Having removed any battery, it will be necessary to restore the synchronization. But the equipment working with the dialog code does not lose synchronization.

Any modern car has a module that automatically blocks the engine. Such modules are called "immobilizers", and their malfunctions are characterized as follows:

The starter cannot be started even with your own (standard) keys;
Commands from the remote control buttons (key) are not perceived in any way.

It happens that the malfunction lies in the electronics of the console. But hardly anyone will undertake to repair it.

Here, it is considered how to repair the immobilizer, more precisely, the antenna and the main unit. The unit itself, at least, can be disassembled by hand, without using special equipment.

The standard equipment of the MAZDA GF-626 car is an immobilizer, in which the main communication frequency is set by a ceramic resonator. The specified detail looks like this.

Over time, the parameters of the parts change. Therefore, the repair of the immobilizer will consist in the following: we solder the "bad" resonator, install a new quartz in its place. The frequency of the quartz resonator can be selected experimentally (here the numbers 2.4576 are indicated on the case).

Let us make a digression regarding the choice of resonators. Having bought a replacement quartz with the corresponding numbers, a good result can not always be obtained. The reason is the following:

Low thermal stability;
Frequency jitter.

In general, a new part is selected as one of several. What you need to know when repairing an immobilizer, key fob and even an alarm. Who said it would be easy?

The immobilizer reads the data from the key, establishing communication with the latter by radio. For standard car systems, the following is characteristic: an inductive antenna is wound around the ignition lock. For example, you cannot start the starter even with your own keys, stitched in the memory of the main unit. Then the immobilizer repair begins with checking the antenna, completely disconnecting it from the connector.

The external view of the antenna module is shown in the figure above. It may turn out that the resistance between the black and white wire is equal to infinity (open circuit).

No one will be able to wind a similar coil with their hands. But you can do the following:

A soldering iron without solder is installed between the turns, and each turn goes through this way until the ohmmeter shows 5-10 ohms;
The gap is eliminated, even with the appearance of short-circuited turns.

When carrying out alarm repairs, you will not encounter the problem discussed here. The antennas are located there in a separate module, and their appearance inspires respect.

Consider the diagram of the main module of a homemade alarm.

The value of all resistors sometimes has to be selected so that the operation is stable. This must be remembered when repairing an immobilizer or signaling that does not have electromagnetic relays in its circuit.

Alarm repair is a difficult task, and special training is needed to solve it. But the block design provides for the replacement of blocks. This property should not be neglected in practice. The choice between the speed of repair and the cost due to the price of a block or module will be made by the owner.

There are many publications on how to fix a car's electrical equipment with your own hands. These publications provide advice: you need to disconnect the negative terminal of the battery. Probably, no one should neglect this recommendation. We wish you success.

Before thinking about how to repair an immobilizer, you need to understand what it is and why you need it. There is a widespread belief that it is simply not needed, because, like any electronic device, it requires attention. And most importantly, attention, the lack of which will lead to unpredictable consequences. At one sad moment, the electronic unit (ECU) of the car will deny its owner the legal capacity.

In other words, he will refuse to obey him. And the culprit will be IMMO, which did not recognize the owner. The proof of ownership presented to him in the form of chip keys, personal tags, coded cards and dialed codes was inconclusive. Whether this wine belongs to the owner himself or the immobilizer needs to be repaired is another matter. It is important that drivers do not like this - nothing should influence the actions of the owner of the car.

As in any serious enterprise, the machine has its own structural hierarchy. The owner of the car, of course, has been entrusted with the position of chairman of the entire board of directors. But at the same time, the executive director is the ECU. He manages the production process through the heads of numerous workshops - numerous functional sensors:

fuel injection adjustment:
regulation by the optimal setting of the throttle valve (its position at idle);
setting of ignition modes;
regulation of the composition of exhaust gases;
management of the gasoline vapor condensation unit;
optimization of exhaust gas circulation - reduction of nitrogen oxide content;
timing management;
maintaining an acceptable engine (coolant) temperature;
coordination of their work with all working systems of the car. This applies, first of all, to anti-lock systems, air conditioning, automatic transmission (gearbox) operation and various security systems.

The immobilizer unit, in this entire production process, plays the role of a security service and is entrusted with monitoring compliance with the access control (execution of the prescribed program).

Important: the exchange of data and the transmission of control commands is carried out via the CAN (-Controller Area Network) bus, which, by combining individual nodes (workshops), creates an integral production complex of the machine.

The immobilizer function consists of several functional structures. Each of them strictly performs its own tasks and itself transfers information to the next structure.

1. Access function or personal pass of the owner It may look like:

standard car ignition key;
cards with a chip embedded in it.It looks like a bank card with a slightly thicker thickness;
an electronic tag in the form of a small key fob;
an electronic code that is typed on the keyboard in the car;
a fingerprint belonging to the owner of the car;
it is possible to combine these options (ignition key with a chip and a personal label);

2. Data transfer function. Its tasks include transferring the data of the access code (pass) to the immobilizer unit for analysis and decision-making. This structure is:

a transmitting antenna located next to the ignition key socket;
radio-electronic data transmission system without wire commutation;

3. The electronic unit itself for analyzing and transmitting data to the main ECU of the car.

The car owner, inserting a chip key into the ignition lock, thus transmits the access code to the immobilizer electronic unit. IMMO, comparing the provided code with the code written into the memory, issues the corresponding command to the car ECU.

1. If the access codes match, the machine's ECU:

issues commands to unlock sensors corresponding to the program. The engine of the car starts up normally and you can start moving;

the car engine does not start;
the engine of the car starts up and immediately stalls;
the engine starts. The car moves for some time, but suddenly stalls, demonstrating a malfunction and the need for repair;

Important: if an immobilizer with an access key chip is located near the car's ECU, then the immobilizer itself with an electronic control system can be located anywhere in the car's interior.

Of course, anything can be broken. But further repair of the malfunction of this "anything" can cost a pretty penny. The situation is similar with the car immobilizer.

The key with the chip fell out of his hands and was crushed in a puddle of water by a passing car. In this case, the owner himself can make repairs - the key itself can be straightened, and the crushed chip can be ordered from dealers or a specialized service. In this case, the driver himself must have a spare key.

The immobilizer antenna sees the chip key unstably. DIY repair can be done by replacing the built-in battery. For DIY repair, it is enough to open the plastic part of the key or key fob with a sharp object (knife) and replace the battery.

In case of unstable operation of the chip key, DIY repair is possible by soldering the contacts, both the key itself and the terminals of the transmitting antenna located next to the car's ignition switch.

The immobilizer does not recognize the native chip and displays a red car with a crossed-out key on the interior panel. You can try to do the repair yourself with a systematic check of all available contacts, both the key and the antenna, and the IMMO itself.

Due to force majeure circumstances, the preinstalled ECU program has flown. Do-it-yourself reprogramming and repair is problematic. Such repairs are carried out only in stationary conditions of a specialized service.

Since there are no moving parts in the electronic blocks of the immobilizer and the ECU, cases of their failure and cases of repair with their own hands are rare. Much more often, specialists with insufficient qualifications write off, under their malfunction, their own inability to eliminate errors in the operation of executive mechanisms.

Important: Important: if the spare key chip is used in the immobilizer bypass to start the car remotely, immediately order a duplicate.

An immobilizer is a seemingly inconspicuous device that, at the same time, has serious capabilities. The respectful and diligent attitude of the owner of the car towards him is a guarantee of reliable operation of the car systems associated with IMMO. The implementation of not very difficult recommendations will be the key to this:

the constant presence of 2 keys with chips should be an unbreakable rule of owners of cars with IMMO;
in the absence of one of the keys, you should definitely order a flashing of the entire system in a specialized service;
the personal tag must be kept as secret as possible from the rest of the keys and documents of the car. This will reduce the risk of vandal seizure of the vehicle;
the greatest range of the chip key will be in the case of its orientation parallel (along) along the plane of the antenna;
thorough knowledge of the material part of the installed immobilizer, its capabilities and operating principles;
it should be borne in mind that for non-digital immobilizers, a blinking LED is the main sign for detecting the main immobilizer unit;
when installing the immobilizer in a specialized service, you should agree on a non-standard place for installing the equipment yourself;
installation of microimmobilizers on most of the functional units of the car will maximize the protection of the car from theft. Such microimmobilizers are connected to the main unit through high frequency communication and their detection is associated with great problems and wasted time.

Installed on a car, IMMO is a reliable assistant to the owner of the car in his protection. It makes no sense to compare the importance of the anti-theft system and the immobilizer. Each of them is significant in its own way. But if the driver himself can do without the service functions of the car alarm, then without the protection of the immobilizer, everything is much more complicated. Moreover, the latest models of this useful device also contain service functions.

Lack of proper experience in the installation and repair of the immobilizer, as well as the likelihood of possible system and installation errors, can disrupt the entire synchronous operation of the vehicle ECU. There is no point in risking the life of the machine, performing repairs for the sake of self-approval principles and fixing immobilizer malfunctions with your own hands. The specialists of professional installation centers will carry out all repairs without errors and with a long-term warranty. But as the wisdom of the ancient Slavs says - if you really want to, then you can.If there are signs of a malfunction of the immobilizer, it is recommended to diagnose not only the device itself, the key, but also the generator, as well as the car battery. If the line voltage is too low, you will need to fix this problem first.Malfunctions in the operation of the vehicle immobilizer unit can be divided into two classes - software and hardware. In the first case, the problems may lie in the destruction of the software written in the control module of the engine system. The standard immobilizer can fail as a result of desynchronization between the unit and the key.Errors and failures of a hardware nature usually include a breakdown of a microcircuit or a system control key. If the circuit is intact, then the reason may be a break in the communication buses, which are responsible for the exchange of information between the elements of the blocker. Regardless of the breakdown class, detailed diagnostics and repair of the device or key will be required.Before repairing damage to the blocker, you must perform the following steps:

Charge the battery. With a discharged battery, the immobilizer may not work correctly. If the battery has run out, it must be dismantled and recharged using a charger.

Use the original key. The main control should be used the one recommended by the manufacturer.

Remove the ignition key from the switch and try to find the problem with it.

Move all electronic devices and gadgets away from the control unit. The interlock is an electronic device, therefore, the presence of the same devices nearby can lead to interference. If, after the devices have been removed, the immo operation has stabilized, then the device is serviceable.

"Symptoms" by which you can determine that the immobilizer is broken:

non-rotation of the starter when trying to start the engine;

the starter rotates the crankshaft, but the power unit does not start;

an immo breakdown indicator on the dashboard in the car's interior lit up, a Check Engine light may appear on the control panel;

when you try to lock or open the car door locks with a key fob, the system does not respond to the actions of the car owner.

Channel "100 Video Inc" told about one of the malfunctions in the operation of the engine blocker.Causes of malfunctions in the work of immo:The process of disabling the blocker depends on the make and model of the car, but in general, the following methods are used:

Deactivating immo using a password. If there is a special code, values are typed on the dashboard of the car, as a result of which the device recognizes and turns off.

Shutdown using a spare key. The immo antenna is connected to the chip from the spare key. Before that, the chip itself must be carefully removed from the key and fastened with electrical tape to the antenna.

Deactivation of the device using a computer and special software.

It is possible to make and install a device that will bypass the work of the blocker so that the latter does not interfere with the operation of the car.Elements that are required to manufacture the bypass module:

chip installed in the spare key;

a piece of wire;

scotch tape and electrical tape;

relay.

The procedure for making a crawler is as follows:

A piece of 15 cm is cut from a skein of electrical tape.

Then the electrical tape is wound on tape.

At the next stage, a piece of wire or wires must be wound around the resulting coil. Approximately about ten turns should come out.

Then the tape is slightly cut with a knife and wrapped on top.

The electrical tape is removed and its excess parts are cut.

The wiring is being soldered to a piece of wire. The place of the adhesion is necessarily insulated.

You can fix the device yourself. If the car owner has no experience with security systems or electronics, it is recommended to entrust this procedure to professionals.With frequent breakdowns of the immobilizer, it makes no sense to repair the faulty blocker, it will be more expedient to replace it.To fix the problem, you need to do the following:

Find the immobilizer control unit in the car. If it is hidden behind the decorative trim of the passenger compartment, then it will need to be dismantled.

Disconnect the main connector with contacts from the module.

Using an iron brush or a special tool with a cotton swab, clean the contact elements on the block. If the contacts are bent, they must be carefully aligned with pliers.

Connect the connector to the microprocessor module and check the correctness of the work performed.

Poor contact of the antenna adapter with the immo receiver is usually caused by the rapid wear of the contact elements on the connector. The problem may lie in their oxidation and appear gradually - at first this is a single case of blocking the internal combustion engine, and then it happens sequentially.User Mikhail2115 told about the transfer of the antenna adapter of the engine blocker for better contact with the receiver.In case of this malfunction, it is necessary to disconnect all conductors connected to the immobilizer unit. After that, they are diagnosed for integrity. It is necessary with a multimeter to ring out all the wires on the control unit and power lines. If one of the cables comes off, it must be soldered to the header.If the battery is not discharged critically, you can try to disconnect it from the power supply for 20-30 minutes, during which time the battery can replenish its charge a little. If this does not happen, it will need to be charged.User Evgeny Shevnin spoke about self-diagnosis of the generating unit using a tester.Initially, it is necessary to unlock the immobilizer, for this you will need to turn off the power.To complete the task you will need:

laptop or computer;

PAK loader;

a roll of electrical tape;

key for 10.

Repair steps are performed as follows:

The microprocessor module is being removed, for this it is necessary to unscrew or disconnect the fastening elements of the case.

The connector with wires is disconnected from the device.

The control unit is being disassembled. This usually requires unscrewing the bolts securing the immo parts.

The immobilizer unit is connected to a computer with a PAK loader, after which all information must be deleted from the module's memory.

The diagnostic line is being restored. Then jumpers are installed between the microprocessor module and the test output to establish communication. In some models of blockers, it is necessary to overwrite the Flash memory to perform the action.

In order to preserve all the functions of the immobilizer, the incoming wires are cut and connected to each other. The connection point is wrapped with electrical tape or soldered, the use of heat shrink tubes is allowed.

The control unit housing is assembled, it is connected to the on-board network and its operation is checked.

Electromagnetic waves appear around:

transformer substations;

welding machines;

microwave ovens;

industrial enterprises, etc.

This problem can break the chip, but usually it appears in the form of malfunctions that block the operation of the car engine.In the event of a mechanical breakdown of the control element and the failure of the tag itself, the help of the service center specialists will be required. You can try to repair the chip if the damage is minor. In case of complete destruction, you will have to contact an authorized dealer to order a duplicate key.Often the problem of a non-working immobilizer key is associated with a discharge of the power supply installed inside.In this case, the symptoms of malfunction will be identical, as with poor contact with the antenna module. The transmission of pulses will not work properly. To solve the problem, you will need to replace the battery.User Andrey Kuvshinov spoke in detail about the self-repair of the ICE blocker.In order not to encounter immobilizer malfunctions, you must take into account the recommendations for use:

The car owner must always have a duplicate key. If a control element malfunctions, it is easier to test the system with a spare key. In the absence of it, it is recommended to do it.

The increased range of the key is provided as a result of its placement along the plane of the transceiver.

The owner of the vehicle must be aware of the exact model of the bollard installed in the vehicle. It is also recommended to understand the principle of its operation in order to eliminate the malfunction at the first signs of breakdown.

If a non-digital immobilizer is installed in the car, then the diode lamp will be the main sign when the microprocessor unit is detected. If the blocker breaks down, this will allow you to quickly find the module and repair it.

The price of restoring the device depends on its model, as well as on the nature of the damage. Image - DIY immobilizer repair

Consider how to repair an immobilizer with your own hands if it is out of order and does not provide its function.

ATTENTION! Found a completely simple way to reduce fuel consumption! Don't believe me? An auto mechanic with 15 years of experience also did not believe until he tried it. And now he saves 35,000 rubles a year on gasoline! Read more"

Today it has become dangerous to leave your own car unattended, in particular if it is constantly on the open

air. Over the past few years, car thefts in Russia have increased a couple of times at once, that is, who else, if not a car owner, needs to think about how to additionally secure their vehicle. An excellent solution to this problem is the anti-theft systems, which are known as immobilizers.Most of the cars produced today are equipped with such equipment in standard modes, but in addition, you can install it as an additional option.

Although, as in any other technique, there are sometimes malfunctions in the work of immobilizers, and there is nothing you can do about it - you will need to contact service centers for help. But, if the breakdown is not difficult, then you can fix it yourself. Now let's look at the most permanent causes of the indicated devices, types of breakdowns and consider how you can turn off the device on your own.

As mentioned above, an immobilizer is an anti-theft system that is designed to block the engine from starting when a vehicle is burglarized. To turn on the motor, the car owner will need a special chip key that reads the equipment and can be compared

with registered information. If there is no chip key, or someone wants to turn on the engine with someone else's key, then the immobilizer is only able to block such an attempt.

Basically, the above system can perfectly cope with its own task, moreover, in rare cases it fails. However, if the equipment nevertheless went out of order or began to emit incomprehensible sounds, then it is impossible to rely on the assistance of various "advisors".

Firstly, in order to carry out a complete and accurate diagnosis, a special technique is needed, which could hardly be lying around in someone's garage.
Secondly, to eliminate the breakdown, you will need not only the appropriate skills, but also huge experience, together with any tools. Also, consider the need to rewrite software.

It's actually pretty easy. If it does not rotate when the starter key is turned, or the engine does not rotate during its rotation, this is a sure sign that the system is buggy. In addition, this is evidenced by the "blinking" of the immobilizer lamps, which is located on the instrument panel, and there is no reaction to pressing the remote key buttons and a quick stop of the power equipment for about a few seconds after the effective start.

Everything mentioned before is the most common manifestation of existing problems and if you have encountered one of them, then most likely you will need to restore the immobilizer or reflash the software. Quite often, all these signs indicate a malfunction of one or a couple of system parts, moreover, at the physical level, which indicates a breakdown of a microcircuit or some other semiconductor part of the immobilizer board, a common engine control unit. Sometimes a technical malfunction is associated with a wiring breakdown and when there is no power or mass on a couple of the constituent areas of the system.

The entire repair process is limited to eliminating the breakdown in this element, and it will probably be necessary to carry out repair work related to the entire system. It is recommended to use the help of a car service specialist: this way you will definitely be able to find out the cause of the breakdown and the area of its localization, then the malfunction can be eliminated by repairing faulty parts.

In the case when the element cannot be repaired, it should be replaced with another one. Place the replacement part, link it to the immobilizer system.

Taking into account the nature of the breakdown, any types of immobilizer breakdowns are of the following types: software and hardware. Software breakdowns are a consequence of a breakdown of the program recorded in the vehicle engine control unit, in the immobilizer itself or in the chip key. Sometimes the synchronization among motor units and devices can get lost. Primarily,

to eliminate such problems, you do not need to change anything or carry out repair work, you only need to restore the "lost" settings of any of the above-mentioned components.

Exceptions may be just disposable chip keys installed on certain vehicle models and after the registration process in the immobilizer of one car it can no longer be registered again. A hardware malfunction of the immobilizer is spoken of when the microcircuit, the motor control unit, or the key itself deteriorates. In addition, nearby can be caused by a break in the communication bus, which are responsible for the exchange of information between the parts of the system.

In any of these cases, you need full-fledged diagnostic work and repair work, or just one chip key, or just an immobilizer in general. If the system constantly deteriorates, and this sometimes happens, and repair work can no longer help, then it will be necessary to remove the equipment. Basically, problems with immobilizers appear due to a breakdown of batteries, disconnecting or connecting an electronic unit, carrying out welding work or installing an autorun. But, in some cases, it is very difficult to find an explanation for such a phenomenon, since there are simply no objective reasons for this moment.

An important point: most of the symptoms of an immobilizer breakdown are quite similar to some other reasons for the lack of turning on the motor, therefore, even a professional-level diagnostic work of a car service can generally be mistaken in the diagnoses made.

If you do not want to buy an immobilizer bypass module, then you can make it yourself. In order to make it yourself, you will need the following:

Now let's look at how to make a coil with your own hands:

Cut off the electrical tape with dimensions of about 15 cm;
we wind electrical tape on scotch tape;
We wind the wiring on electrical tape, making about 10 turns;
You just need to cut the electrical tape and wrap it on top;
remove the electrical tape and cut off the excess;
It is necessary to solder the wiring to the wire and glue it with electrical tape.

Then we install our coil on the ignition switch. For the production of a key coil, we wind the wire around the key, and the number of turns should be about 8 times. Then you need to wrap the coil with electrical tape and collect everything together.

Video (click to play).