How does a keyless immobilizer bypass work?

How to disable the immobilizer using the StarLine crawler

Publication date: March 15, 2016.

Today, most cars are equipped with a standard immobilizer. This device allows you to prevent the theft of a vehicle, even if the attacker managed to disable the car alarm. In this case, the device operates on a different principle than the “signaling”.

Immo remains invisible until the last moment and does not emit any signals to attract others or scare off the robber.

The principle of operation of this device is that as soon as the thief inserts his key into the ignition, the engine will automatically turn off and nothing can be done with the car.

There are also immobilizers that even allow you to move away, but as soon as the thief drives a few hundred meters, all the car’s systems will turn off and the robber will have no choice but to immediately leave the car and escape from the scene of the crime.

Of course, in theory everything sounds great, but in practice immo often starts to malfunction, causing car owners a lot of inconvenience. The most common problem is the engine turning off, even if the owner of the car is driving. This happens, as usual, at the most inconvenient moment and the driver has to use the emergency system of the engine plant or even call a tow truck.

The second common problem is the loss of the “native” key.

It’s no wonder that, along with modern “anti-theft” devices, special devices began to appear that allow you to bypass the immobilizer with your own hands. The most popular crawlers today are Starline devices, which can bypass various operating systems of standard devices.

What systems of operation of a regular immo exist?

All standard “anti-theft” systems work according to one of two systems, namely:

1. RFID (Radio Frequency Identification). Such systems consist of a special chip located inside the key, which is connected to the immobilizer. In a situation where the device does not detect this key, the engine will not start. Systems of this type apply to European and Asian machines.

1. VATS (Vehicle Anti-Theft System). A system aimed at “Americans” has higher requirements (resistance and other characteristics). Only when all conditions are met does the control unit allow the engine to start.

The VATS system is considered the most difficult to bypass, since technologies are constantly being improved during the production of such devices. For example, the encryption in such devices is no longer 40-bit, but 80-bit, as a result of which it will be extremely difficult to bypass such an immo.

Healthy! In order to disable the standard immobilizer operating on the VATS system, it is enough to determine the resistance value of the resistor. Typically it ranges from 400-11800 Ohms. If you determine it, then all that remains is to select a part with the same indicator.

Today, the most popular devices are equipped with just such blocks (VATS), for example, the Starline i95 immobilizer. But you shouldn’t despair, since the same company that produces the best immos today also produces the highest quality linemen.

Immobilizer bypass module StarLine BP 03

It’s worth saying right away that the younger brother of this lineman, Starline bp 02, is not universal and its configuration does not allow the device to be installed on any car. Later, the developers’ shortcomings were taken into account and a more modern and “omnivorous” device was born - Starline bp 03.

This device is intended for standard devices operating using the RFID system. Typically, such devices do not allow starting the engine remotely, which, in turn, is inconvenient for several reasons.

First, you can't start your car from home to warm it up in the cold of winter. Secondly, remote engine start is considered more reliable, since at this moment a potential thief will not see you.

In order to solve these problems, it is enough to install the Starline immobilizer bypass module, which costs about 500-600 rubles.

This useful device consists of:

• central block;
• loop antenna with connector and cable for connection;
• antennas in the form of a wire loop;
• instructions.

Important! In order for the standard bp 03 immobilizer bypass module to work, you will need a spare key with a transponder. You can order it at the dealership of your car brand.

To install bp 03, you don’t need any special knowledge; it’s enough to understand at least something about electronics and have hands growing from your shoulders.

How to connect the Starline crawler module

To connect the Starline immobilizer crawler, you will need to open the housing of the central control unit and insert a spare key with a chip (transponder) into it. In this case, the flat antenna is located inward.

Be sure to secure the device so that it does not move. After this, close the central unit and install it in a hard-to-reach place (usually the device is installed behind the dashboard).

After this, you need to connect the Starline immobilizer bypass unit according to one of the diagrams.

Wire markings:

• Red is a power plus. Connects to a circuit with a voltage of +12V (the ignition must be turned on).
• Black is a minus. Control input (70 mA). When a negative charge is applied to this input, the standard key code is read. The black wire must be connected to the remote start system output.
• Gray (several wires). Depending on the characteristics of the car, their connection diagram differs.

There are several connection schemes, again depending on the characteristics of the elements:

• According to the first scheme, the external loop antenna is mounted on the ignition switch cylinder, after which it is connected to the connector at the end of the gray wire. In this case, it is important to maintain a minimum distance between the standard RFID antenna and the antenna of the module itself.

• The second diagram is useful if you cannot install a loop antenna due to the design features of the vehicle. In this situation, the antenna is wound from several turns of gray wire and placed on top of the standard antenna on the ignition cylinder. In this case, the distance should also be minimal.

If you want to connect a Starline keyless immobilizer bypass, the circuit will be more complicated. In this case, a combined connection is made. The crawler connects to the data lines and at the same time connects to the CAN bus (it is possible to connect to two at once, cabin and engine). Such keyless methods are most often suitable for Nissan and Kia cars.

In custody

The Starline immobilizer bypass will allow you to solve problems associated with the “imperfection” of the standard immobilizer. The device costs a penny, but brings a lot of joy to car enthusiasts. The main thing is to correctly follow the connection diagram, which you will find in the instructions for the device.

Source: https://avto-moto-shtuchki.ru/jelektronika/46-modul-obhoda-immobilajzera-starline.html

Interesting too

An immobilizer is an anti-theft system in which the vehicle can only be started if the original key is present.

A “native” key is only the key that is registered in the car’s anti-theft system, or, in professional language, in its “brains.”

The anti-theft system is designed to eliminate the possibility of vehicle theft using a suitable master key or wire connection.

The keys of modern cars have a special built-in chip - a transponder (not to be confused with a transponder for toll roads).

The lock has a device antenna, which, upon visual contact, reads information, and if the electronic code is correct, the car will open. Modern manufacturers have come up with a system called “car alarm with auto start”.

But if the car has an immobilizer, then it will not be possible to install it, since a conflict will arise between the devices and the result will not work.

But car enthusiasts were not at a loss and found a way out of the situation, the so-called immobilizer bypass block - this means installing a chip located in the spare key or in the mechanism of the key itself into the security mechanism. If you want to start a car without autostart, with a chipless key, then nothing will work, because the cunning scheme only works for autostarting the car.

This sensor is hidden deep in the alarm system and turns on only when the car starts.

Choosing a circuit and making a bypass block with your own hands

You can buy the device, or you can make it yourself. To do this, you need a second transponder, electrical tape and wire, which will act as an antenna.

How to make an immobilizer bypasser with your own hands:

1. First you need to make a frame for the ignition switch. It is necessary to select a frame of the required size so that the constructed structure can fit under the ignition switch. The frame is wrapped with adhesive tape or double-sided tape;
2. Several layers of wire must be wound around the frame;
3. We wrap the wire with electrical tape, cut off the remaining tape;
4. You will get a thin ring frame;
5. We solder the positive and negative terminals and wrap them with electrical tape;
6. The constructed frame is wound around the chip and again wrapped with electrical tape;
7. There are rarely times when a homemade frame does not fit in the lock casing. Then the antenna is manufactured separately from the chip. In this case, a homemade ring is not needed at all; the winding around the chip is turned on instead of the standard one at the time of remote start.

Review of popular models

In cars, depending on the type of assembly, American or European, there are various security systems.

And in order to enable autostart, you need to come up with different options for bypassing the security system.

Fortunately, the industry has done a great job, and there are a sufficient number of immobilizer bypass units. Before considering crawler models, let’s consider how this system works.

When the remote car start is working, the relay, which is located in the immobilizer bypass module, is activated. Through the contacts, the signal affects the external antenna of the lineman, and from this antenna it influences the standard antenna of the device, which is located on the starter. And along the standard wire the signal goes to the “brains” of the car.

• The first option is the Scher-Khan BP-2 bypass unit

The design is quite simple and convenient. An additional key is included in the box. There are cases when the car owner does not have a second transponder. To do this, you must make a second key. A relay and a reading antenna are also placed in the box.

The system works quite simply. The transponder is placed inside the box next to the reading antenna. The external antenna is attached to the starter. With this system, it is mandatory to minimize the distance between two antennas: the standard antenna and the crawler antenna.

The red wire is connected to the positive 12 V, and the black wire to the negative. It is important that the wires do not short circuit with each other. When starting a machine automatically or remotely, signals must be sent. If everything works, then you can hide the device. When you assemble the steering rack casing, do not move the homemade structure, otherwise all the work will be in vain.

• The second model of a similar device is the “universal module” of the immobilizer crawler.

A universal keyless immobilizer bypass is more expensive, but at the same time it has several connections, so the likelihood of this device working increases several times. Thanks to this device, you can open a car of any brand.

Has a large loop. There are cases that linemen have small loops and cannot be secured to the ignition switch. The loop is the antenna, and it can be attached anywhere. A positive quality of this device model is that, thanks to the long loop, it can be wrapped several times, which will increase the likelihood of bypassing the immobilizer.

• Starline immobilizer bypass module (Starline BP-03)

A wonderful, inexpensive device that has proven itself well. It has a compact shape and is easy to install. Suitable for any vehicle transport system.

These are not all bypass blocks. There are other options that can help solve the problem of bypassing the immobilizer.

How to connect an immobilizer bypass?

Installing the crawler is not difficult. You need to open the housing of the central unit and insert the transponder from the second key or the key itself.

The chip must be fixed in such a way that it does not fall or move when moving. The housing must be closed. The unit must be secured in a hard-to-reach place, such as behind the dashboard.

Route the module wire. Check the operation of the immobilizer bypass unit by autostarting the car.

How to make an immobilizer bypasser with your own hands, video instructions:

Source: http://avto-femida.ru/driver/useful/obhodchik-immubilayzera.html

Is it possible to disable the immobilizer with your own hands?

Modern technologies allow you to protect your car from break-ins and theft in different ways. Oddly enough, many of us use a regular lock the old fashioned way. More advanced car owners install powerful anti-theft systems on their “iron horses,” while others do not worry about their car at all, since it is protected by an immobilizer.

Unfortunately, many car owners have not even heard of such a device, although experts call it the future of automobile safety. Whether this is true or not, we will try to figure it out in this article. We will also pay special attention to the question of how to disable the immobilizer when the car owner has lost the key.

The principle of operation of the immobilizer, or what kind of device is it?

If we literally translate the name of this device from English, we get the term “immobilizer.” This word most accurately conveys the whole essence of the immobilizer’s operation - to exclude even the slightest possibility of starting the car engine without the participation of the key owner.

Essentially, this is a whole complex of various electronic sensors that block certain car systems, preventing thieves from starting and moving your car. Often, an immobilizer blocks the entire fuel supply system to the engine or the ignition system. Thus, even if the thief made his way into the car, he will not drive away in it.

The principle of operation of the immobilizer is quite simple. When a stranger tries to start the car, the device breaks the electrical circuit to prevent the ignition signal from being sent.

The reverse process is also possible, when the immobilizer supplies power to specially installed mechanisms, thanks to which the engine and its power system are blocked.

As a result, the engine does not start at all, or it may stall after a certain time, when the thief leaves the parking lot and walks a few meters.

The big advantage of this device is that even after the wires are broken or attempts are made to “neutralize” it, the car is still blocked. That is, if the device system detects a hacking attempt, it immediately reacts in the manner described above, blocking both itself and all vehicle systems.

In this case, the immobilizer is activated automatically. This means that if you left the car unattended for a certain period of time, the immobilizer will soon react and block it. For this reason, leaving the car without keys is strongly discouraged, since you yourself will not be able to get into the salon.

Components of a car immobilizer system

The configuration of this device is standard. However, recently manufacturers have begun to pay more and more attention to it, so more and more expensive and “sophisticated” devices can increasingly be found. Yet, despite the innovations, the basis of any immobilizer consists of:

Device control unit. In fact, it is the center of the entire vehicle protection system. This is where all the signals that come to it from the sensors are processed. Accordingly, it is the control unit that sends the blocking command if it identifies any external actions as unauthorized.

Microimmobilizer or electromagnetic relay , thanks to which the electrical circuit of the car is broken. That is, this block executes commands from the immobilizer control unit.

Car key. It is through this that the system is able to recognize you as the owner and give access to the car. The “identification” process occurs thanks to a special chip that is installed in the key itself. The chip is pre-encoded with a specific signal or code that the control unit can recognize.

In general, all immobilizers are divided into two main types - contact devices and contactless ones. The first type is usually classified as immobilizers, which are activated by using a key.

But for the second type, instead of a key, a transponder (a transceiver that is capable of sending its own signal in response to one just received from another device) or a special tag card can be used.

There are also code immobilizers, which, however, are used much less frequently. Their essence lies in the fact that in order to activate or deactivate such a device, the driver constantly has to dial a certain code combination on a special panel. In recent years, immobilizers have begun to be used that recognize the owner of a car by fingerprint.

Important aspects of the operation of a typical immobilizer

According to the principle of operation, immobilizers are not much different from conventional car alarms, although in many ways they are inferior to it. In particular, the latest developments in “alarms” for cars make it possible to track the thief even via satellite and immediately inform the owner about the break-in.

With immobilizers, everything is much simpler - they simply do not allow the thief to start the car. That is, you will only find out later that the car was stolen.

But this also has its advantages: you don’t have to track it for a long time and search throughout the city or even the country.

The appearance of the device, as well as its location, also complicates the task for thieves. A car thief can spend several hours trying to find the immobilizer on a car, but his work will still not be successful.

It is not always possible to get to it even by wire, since the device operates through a standard network and receives only high-frequency waves.

And in appearance, any immobilizer is very easy to confuse with other car equipment.

The same applies to micro-immobilizers, which are very easy to confuse with one of the car’s devices – for example, with a fuse. Since several such relays can be installed on one machine, in order to find them and neutralize them, you will have to spend not only hours, but even several days.

Immobilizers, which have the ability to slightly delay engine blocking, deserve special attention.

The essence of how such a device works is as follows: when a thief gets into the car, he still manages to start the engine and move using his own methods. However, not having covered even a few hundred meters, the car suddenly stalls.

Having stopped in the middle of the road, the thief has no choice but to abandon the car. After all, if he starts fiddling with it on the road, he risks attracting the attention of others and “lighting up” his face.

Transponder immobilizer system: what are the features and differences?

On modern cars you will most likely encounter just such a system. Its advantage is that it minimizes the risk of possible theft.

What makes it special? To activate the transponder immobilizer, even a professional auto mechanic will have to spend a lot of time and go through almost the entire car.

And the essence of such a system is contactless response.

The transponder immobilizer is locked or unlocked thanks to a special key fob or card, in which a special code or cipher is encrypted.

When the key is within the range of the immobilizer receiver, the car is unlocked and the owner can safely start the engine and drive in any direction.

When he moves away from the car, it will no longer be possible to start it in any other way, since the immobilizer is simply blocked.

Such a transceiver can also be hidden anywhere. The instrument panel, engine compartment, and seat upholstery are suitable for this. The most important thing is to make the disguise as reliable as possible. It is also impossible to find it using special equipment.

Self-installation of immobilizers is practically not carried out, since this requires high professionalism and extensive practice in working with such a device. Therefore, if you want to install an immobilizer on your car, it is better to contact specialists about this.

Disabling the immobilizer: can this be done without outside help?

If in any case you have to contact specialists to install the immobilizer, then you can figure out how to disable it yourself. At the same time, it very often happens that disabling the immobilizer is not at all a whim of the car owner, but a very urgent need. There may be several reasons for this, and we will name only the most common:

1) The car owner lost the key. This means that neither starting nor any other operation of the car becomes impossible.

2) There is a breakdown in the electronic control unit or other important immobilizer control elements, which has caused the inability to start the car.

3) Inability to combine remote control of the car and immobilizer. Typically, car owners have to choose between these two devices.

4) Desire to install a regular alarm system. In this case, you should understand that installing a “signal” only helps to scare away intruders, but they will still be able to steal a car almost without hindrance.

If the car owner is not afraid that his car may be stolen, but the immobilizer interferes with him when he wants to start the car without using a key.

Let's see what methods exist to disable the immobilizer. However, it should immediately be noted that this issue must be approached with all seriousness. After all, each device works in its own way, so turning it off will have its own characteristics.

Many immobilizer models provide coded disabling of this device. That is, if you accidentally lost the key to it, you can start the car by simply typing a certain combination of numbers on a special panel. This will allow the device to recognize you as the owner of the car.

However, after disabling the immobilizer in this way, the car remains unprotected, and if you decide to make a new key, it and the immobilizer will need to be flashed to make it compatible. And this, of course, will take a lot of time and require the intervention of a specialist.

The situation will look less sad if you still have a spare key. Then it will be possible to bypass the immobilizer by connecting its antenna to the chip from the spare key. The chip itself will need to be very carefully removed from the key and literally taped to the antenna with electrical tape.

However, on modern cars the chip is most often not installed. In this case, you will have to resort to special chipless crawlers.

Such devices are capable of reading immobilizer signals and decrypting them, thereby neutralizing their effect and giving access to the car.

If you have enough time and money, you can contact specialists to disable the immobilizer.

To carry out this process professionally, special programs are used that can directly influence the immobilizer control unit.

This option is suitable for any type of immobilizer, but without special training and experience it is simply impossible to cope with this task.

Also, by contacting the official dealer of your car model, you can get from them a special device that can disable your standard immobilizer, which blocks the engine. At its core, this device is a universal key to any immobilizer, but in a professional environment it is called a “killer”.

In order to transfer a blocked immobilizer to inactive status, the “killer” is connected to the control unit at the moment when the driver turns on the ignition. Thanks to this, the access password is activated, after which the existing program is replaced with the standard one. For further use of the immobilizer, it is reflashed with a new key.

How to disable the immobilizer: getting acquainted with a device called an “emulator”

The above methods of “fighting” a locked immobilizer, although effective, will not solve your problem if you need a car every day, but you can’t even leave the parking lot.

To contact official dealers of your car manufacturer or find a car service that deals with these devices, you will have to spend a lot of time.

And plus direct work with the immobilizer... To avoid all this hassle, resourceful car enthusiasts use a special immobilizer crawler called an emulator.

What result can you get from the emulator? It completely disables the immobilizer, even if it is locked, and allows the car owner to start the car.

The emulator, as it were, “bypasses” the immobilizer programs, as a result of which the latter loses its influence on the car. But when using an emulator, do not forget that with its help you remove protection from the car.

And if there is no alarm on it, anyone can start and steal your car.

By the way, the presence of an emulator will not hinder the installation of an alarm system. Both the simplest systems and the latest “signals” with the function of remotely starting a car engine are suitable.

At the same time, using an emulator, you can quite successfully combine an immobilizer and alarm system. Then, thanks to the latter, you will be able to start the engine even without a key.

However, if the alarm system is hacked, the immobilizer will not allow an unauthorized person to start the engine.

But the immobilizer emulator is also useful because, thanks to the presence of a special diagnostic LED in it, the car owner can find out about the presence of certain vehicle malfunctions:

– the device was connected incorrectly;

– the device is incompatible with the machine’s electronic control unit;

– the serial bus is not working properly.

In addition, there is no need to select an emulator for a specific type of immobilizer, since this device is universal.

The program installed by the manufacturer automatically adjusts to the speed of the tire and allows all vehicle components to work smoothly and harmoniously.

The only thing that needs to be taken into account when buying an emulator is the generation of the immobilizer used on your car. Therefore, the device must first be checked and then purchased.

Installation of the immobilizer emulator is carried out without the help of specialists. The device must be accompanied by instructions that will indicate to you all the necessary actions to perform. The only caveat: if you are not strong in automotive electrics, you shouldn’t take on the matter yourself.

We hope that you are now convinced that the device we are describing is not such a complicated thing, especially since you already know how to disable the immobilizer. So, if you lose your car key, don’t panic and immediately go to the car store for an emulator.

Source: https://auto.today/bok/3494-mozhno-li-otklyuchit-immobilayzer.html

Immobilizer bypass - can you do it yourself?

With the advent of new anti-theft systems, new ways to bypass them have emerged. In this article we will take a closer look at what an immobilizer is, why it is bypassed, and how to make an immobilizer bypass?

What is an immobilizer?

The immobilizer is a new anti-theft system that electronically prevents unauthorized engine starting. In its modern form, it connects to the electronic engine control unit and blocks signals to the electrical circuits of the ignition or starter system.

To unlock the system, you need a special electronic key, which is scanned by a specific device, giving permission to start the engine. An electronic key scanner can be installed both inside the ignition switch (scans the key itself) and outside (scans a special coded key fob).

In domestically produced cars, the second method is mainly used.

Any immobilizer consists of two parts, the first of which is a special control unit. This device sends the necessary information to the vehicle’s on-board network to close or open the engine start circuit. The second part is the code key itself, with which you can unlock the anti-theft system.

Why do you need to “bypass” the immobilizer?

The immobilizer is a standard device that is pre-installed by the manufacturer. Some drivers either do not need this device or experience some inconvenience when operating the car. The solution to this problem is an immobilizer crawler. Why is it installed?

• The standard immobilizer does not work correctly and often blocks the starting system, preventing it from being unlocked. Thus, difficulties arise when operating the car.
• The owner of the car expressed a desire to install an alarm system with auto start. In this case, the immobilizer may prevent you from starting the engine using the button on the remote control.
• The special code key was . As you know, it is impossible to start the engine without this key.
• The driver is simply unnerved by the constant scanning of the key .

It is in these cases that an immobilizer bypass is needed.

Video - How the StarLine immobilizer bypass works

How to make a lineman with your own hands?

Probably the very first thing that comes to mind is disabling the anti-theft system. However, as mentioned earlier, disabling the immobilizer leads to blocking the engine starting system, so this option should be considered a little differently. The most reasonable solution in this situation is to reprogram the control unit.

The unit is reflashed and it starts working regardless of whether there is an immobilizer or not. Another option involves connecting a special emulator to the network, which will constantly signal that the key has already been scanned.

Thus, the immobilizer problem can be solved without major intervention in the electrical wiring of the car.

To bypass the immobilizer, you can use special modules that are connected to the launch system control unit. There are two types, RFID and VATS. The first type is applicable to cars of Asian and European assembly, and the second - for American assembly.

The proposed type of crawler is an extension cord with exactly the same key, which transmits information from the key to the immobilizer antenna. The main feature of this system is that it has the ability to turn on and off, which will not allow an attacker to take possession of your car using the most ordinary key.

A ring antenna is built into the crawler unit, inside which a code key is placed. Both ends of the antenna go to the immobilizer module in the ignition switch and form the second antenna ring. The distance between the two antennas should be as small as possible, otherwise the signal will be too weak and the immobilizer will not be able to read the information from the code key.

A switch is connected between the terminals, which must be placed in a secret place. It turns out that the signal received from the code key will be transmitted to the ignition module where the immobilizer is installed, but it will be enough to scan the information. To control turning on and off, a 12 Volt relay must be present in the circuit.

The operating principle will be as follows. You press the hidden button - this means that the key has already been scanned. Then insert your key into the ignition and start the engine. If desired, you can exclude the switch from the circuit and read the code information continuously.

This system has a simpler design. The key that is used to start the engine has a special resistor, the resistance of which is the information for starting the engine. The resistance value is selected for each vehicle individually and changing this value will not be possible.

To bypass this anti-theft system, instead of a key, you need to connect a resistor with the required resistance to the immobilizer wires. To do this, disassemble the steering column of the car and find the wires that connect to the VATS system. The color of the wires may vary noticeably, so before starting work, check this information in the technical literature of the car.

Procedure:

• Once you have found those wires, cut one of them and have an ohmmeter ready. Using an ohmmeter, measure the metal resistance of the ignition key.
• Turn on the ignition and place one contact of the ohmmeter on the end of the cut wire, and the second contact on the end of the uncut wire. Measure the resistance and record the instrument readings with high accuracy (up to two decimal places).
•  If the value matches, start selecting the required resistor. It is best to install a variable resistor to avoid unnecessary DC errors.
• Connect both ends of the broken wire to the NC relay, and connect the resistor with one end to the relay and the other to the end of the intact wire. The relay winding is connected directly with the “plus”, and with the “minus” to the car alarm. Thus, after turning on the alarm, the lineman turns off, and after turning off, on the contrary, it turns on and makes it possible to start the engine with a regular key.

This is how you can bypass the standard immobilizer using simple electrical techniques

Source: http://VipWash.ru/elektrika-avtomobilya/obhodchik-immobilayzera

You can make an immobilizer bypass module yourself: diagram, examples, video

Having connected the alarm according to the diagram proposed by the equipment manufacturer, owners often encounter a problem - all functions work except autostart. Voltage appears at the starter, the motor shaft begins to rotate, but after a certain time it stops.

In fact, this is how a standard immobilizer works, protecting the car from theft. Therefore, it is necessary to connect not only the ignition wires to the main alarm unit, but also the immobilizer bypass module. Then autostart can be carried out in the established mode, without fear of stopping the starter.

Next we look at how to make an immobilizer bypass yourself. Happy reading.

What exactly will be implemented

Any workman for a standard immobilizer, both purchased and homemade, is designed simply:

1. A coil consisting of 50-100 turns is wound around the electronic key chip.
2. Another inductor, also containing 50-100 turns, is located near the ignition switch.
3. At the time of autostart, the coils are combined into a closed circuit. Due to this, the immobilizer behaves in the same way as if there is a key near the standard lock.

All crawlers, except Fortin, do not work without the key module placed in the car at all times. This is why insurers increase the cost of CASCO insurance. A typical crawler diagram is given below.

Schematic diagram of a homemade lineman

Factory-made devices repeat in their circuit what is shown in the first figure.

Factory manufactured device

For all those who have doubts, here is a view of the board from below.

Factory device circuit board

Installing and connecting a crawler, regardless of its model, always looks the same.

Connecting a lineman to the gap of a standard coil

Features of the practical implementation of the scheme

Let's say you plan to make an immobilizer bypass. Then, without the standard key registered in the control unit, nothing will work. Take the disassembled key chip and remove the battery.

Printed circuit board of the standard key fob

The design shown can be placed inside a heat shrink tube. And you need to wind a wire on top (exactly 50 turns).

The wire is wound around the chip

Let's look at how to make an immobilizer bypass module from easily purchased parts: 4-pin relay, 1N4001 diode, winding wire (d=0.35-0.5 mm).

When installing the module in a car, take care of the following: the module itself must be placed discreetly, and the power cord (1-2 A) must reach it. The lineman is assembled and installed according to two diagrams shown at the beginning of “Chapter 1”.

Making a crawler module

The bypass module for a standard immobilizer, if it is factory-made, may even contain active elements (transistors, etc.). However, the body of such modules is always made of plastic. This is no coincidence. If the body is made of metal, you will get the equivalent of a shorted turn in the main coil - the one wound around the key.

Plastic box and relay

When installing the module, this circumstance must also be taken into account. Do not place the case near metal surfaces (this is advisable).

Let's say you managed to make a box. Now take a 4-pin relay, rated for 12-14 Volts, and secure it inside the housing. By bypassing the immobilizer, you are switching less than an ampere of current. Therefore, the relay can be anything as long as it can withstand a significant number of operations.

Lineman switching element

It is better to solder the “1N4001” diode to the relay taps. At the same time, remember that the diode is turned on in reverse polarity (“arrow” is directed “from minus”).

There will be 4 wires coming out of the housing:

• Two-wire cable for connecting an external coil. Its installation is usually carried out “on site” by removing the casing from the lock.
• The power wire is of negative polarity (will go to the alarm).
• “+12 Volt” cord (power will be supplied to it constantly).

Once again check the diagram shown at the beginning. The immobilizer bypass itself does not contain only a “round” coil. It turns out that four cords come out of the module. They are listed in the list.

Subtleties of making a “cheating coil”

The inductor placed next to the lock should contain 50 turns of winding wire. It can be any brand, but the thin winding cable will constantly break. There are two options:

• A part called “coil” is made separately and secured to the lock casing when the system is being installed;
• The lock casing itself is dismantled, having first disconnected the electrical connector, and the cord is wound directly onto the casing.

In the first case, you can use a glass cup covered with insulating tape. At the last stage, the winding is fastened using epoxy resin.

The coil is separate from the lock

The result of all efforts will look as shown in the photo.

If we talk about “case 2”, the result may look even better.

Two coils - “ours” and “standard”

Having screwed the heated screws into black plastic, their caps are then used as terminals. A thin wire is soldered to the surface of the terminals, having previously stripped it. We wish you success.

Homemade lineman - questions and answers

A common question is: if a homemade immobilizer bypass was installed, can it be replaced with a factory one over time? Roughly speaking, they ask whether it is permissible to connect a homemade antenna to serial equipment.

Let's say that in the serial walker circuit the antenna circuit contains only a relay. Then the answer will be yes. In other cases, you need to look at the diagram. And if you have even the slightest doubt, don’t connect.

The standard immobilizer bypass module may contain a large set of elements, but they often relate not to the antenna circuit, but to the power circuit. For example, this is done in BP-05 devices (Starline):

The key electronics may not work if disconnected from the power supply. It is for such key fobs that the presence of a stabilizer is provided, which is turned on at the moment the lineman is triggered.

The review would be incomplete if the following were not mentioned here. Bypassing the standard immobilizer can be done simply by sending codes via the CAN bus. These codes allow you to deactivate protection temporarily. Installation of crawlers using this principle involves connecting to two wires - CAN bus conductors.

Having a key, as you understand, is not required in such cases. They do not recommend installing “keyless” crawlers for the following reason: the device can generate error codes that are written to the engine ECU, and then they have to be deleted.

Finalization of the serial crawler circuit

Source: http://autolocked.ru/immobilajzery/modul-obhoda-immobilajzera