Immobilizer Lada Granta (how to disable or activate)

Principle of operation

The immo's task is to prevent an attacker from starting a car in order to steal it. The device body is small in size and is located in places that are difficult to break into. If a standard alarm can only scare away a thief, then the immobilizer does not allow the car to start if the person does not have a special electronic key (tag).

There are 3 groups of protective devices:

Contact and code immobilizers give away their location to an attacker due to the presence of a reader or device for entering a code. To start the motor, you need to enter a code or touch the chip to the contact pad. These devices will only prevent the engine from starting during initial startup. This protection mode resembles the operation mode of a secret button. Installing a secret button is cheaper than the cost of these devices, so they have not gained much popularity.

Modern Russian cars are equipped with standard contactless immobilizers, in which a chip with a code is located in the ignition key. The protection device works as follows:

1. The driver inserts the key into the ignition switch; when the key is turned, current from the on-board network is supplied to a coil of copper wire wound around the lock.
2. The generated electromagnetic field pulse, propagating in space, induces current in the microantenna, which is located in the ignition key body, and charges the capacitance that supplies voltage to the chip containing the code.
3. The complex electromagnetic signal generated by the chip is transmitted back to a coil wound around the ignition switch. The code in the form of an electrical signal is sent to the immobilizer, which carries out the recognition procedure. If the immo confirms the authenticity of the code, it sends a command to the electronic engine control unit (ECU) to start the car engine.

This type of protective device tests the chip once when the engine is started; more advanced immobilizers have a “WAIT-UP” relay that does not block engine operation when the vehicle is not moving. This anti-theft system tests the chip at specified intervals.

If the car starts moving and there is no chip with a tag inside it, the engine will be turned off.

Such systems operate at 2.4 GHz, are miniature in size and are located in a wiring harness to hide them from intruders. The tag is equipped with a battery, and it is tested by the anti-theft system at a specified frequency. The encoded chip should be stored separately from the ignition key. This increases the vehicle's protection from possible theft. If the driver is forcibly removed from the car, the engine will stall after a preset time.

If, when you turn the ignition key, the immobilizer icon blinks or does not go out, and the engine does not start, then most likely there is a malfunction in the anti-theft system in the car.

No response to starter/fuel pump, won't start, lights are on

Hello. I hope I won’t beat you up for a question that has probably been discussed a hundred times, but I couldn’t find a similar problem through Google.

The car will not start, when you turn the key the lights come on, then there is no reaction (even when you turn the key to start the engine). I can't hear the fuel pump running. generally quiet. Stories of the beginning.

I started the car, went to the store, bought what I needed, got out, started it with the alarm, and it started. Approaching the car, I turn off the alarm, open the door, and the car stalls. I sit down, turn the key to start, turn, the lights come on, another turn - no reaction. I walked around, removed the positive terminal, after a couple of minutes I returned the terminal, the key to start-zero reaction. I do self-diagnosis, nothing happens, there seem to be no errors. I pull out the jumper, try to start it and it STARTS. At this time the frost was about 25 degrees.

I drove it for about a month without any problems, it started from the alarm and from the key too. But then the frost came.

This morning it was -24, it started without problems, we went to the store and wandered around for about 30 minutes. When leaving, I didn’t start it with the signal. We get into the car, turn the key and there is zero reaction (all the lights are on, mayfun, etc.), I push the key to the initial position, start it again and it STARTS. We arrived home, the car sat for about 4 hours, I decided to start it while going to the store, but in vain. The first turn of the key, the lights come on, the tidy is on, the mayfun is working, then the turn has ZERO response, finally nothing.

If the engine is blocked from starting

On domestic cars, there are often cases when, due to the appearance of various malfunctions, the immobilizer system begins to fail, the immobilizer lights up on the panel, preventing the vehicle’s engine from starting.

If the car does not start, you can use the emergency immobilizer shutdown procedure by entering a special code into the electronic engine control unit by pressing the accelerator pedal in a given sequence. Each car model has its own instructions for this procedure, developed by the vehicle manufacturer.

Causes

A faulty immobilizer blocks the engine from starting and prevents the driver from using the vehicle for its intended purpose. What can lead to immobilizer failure:

• a dead battery in the identification chip in the immo operating on a radio channel;
• failure of the chip with the code, which is built into the key;
• damage and breakage of the coil wound on the ignition switch;
• damage to the electrical circuits powering the immobilizer or connecting it to the electronic engine control system;
• damage to information in the read-only memory (ROM) of the anti-theft system or engine ECU due to powerful electromagnetic disturbance;
• starting the starter and engine ignition system when the battery is insufficiently charged;
• removing the terminals from the battery with the ignition on.

What to do

If the immobilizer has blocked the engine from starting, you must do the following:

• If you suspect that the battery in the identification chip is low, use a duplicate or replace the battery in it. In cars of medium and high price categories, there is a special slot in which, when placed in it, an electronic key with a discharged battery will work.
• When purchasing a car, the driver is given 3 keys. 2 working black and 1 training with red insert. The chips of the working keys are registered in the memory of the anti-theft system, and with their help you can write 5 more keys into it yourself according to the factory instructions. Having spare chips will eliminate the problem of their failure.
• Unlocking the engine ignition system in the event of failure of the power supply circuits of the immo and engine ECU will occur when the fault is repaired by an auto electrician.
• An open circuit in the pumping circuit at the ignition switch can be checked using an additional emulator connected in parallel via a diode and a relay to the main coil. If it works and the engine starts, then the coil has failed. You can also check it “for an open circuit” using a multimeter, after first disconnecting it from the electrical circuit.
• Unblocking engine starting if information in the ROM of the electronic engine control unit or immobilizer is deleted or damaged is only possible after deleting the damaged data and flashing the memory using special equipment and software.

Lada Granta Grantazalt+LADA.CC › Logbook › Breakdown No. (immobilizer)

I spent the whole day illuminating the doors (previous post), finished the installation... got into the car... key in the ignition... and oops! does not start! The “immobilizer” icon lights up on the instrument panel. The car won't start?! I decided to reset the battery terminal for a couple of minutes in order to clear the error... It won’t start?! I began to blame the alarm system, that the fuse had burned out and it froze and blocked the fuel pump... I take apart the whole beard, disconnect all the wires from the alarm - it won’t start?! All the relays and fuses rang, the starter and the fuel pump and the ignition - everything works separately, but the car won’t start?! At first they tormented electrician friends over the phone) Then one of them arrived at the scene at about 22-00 and, in the light of an LED flashlight, climbed and checked everything on his own. The problem he voiced was that there was no signal to the fuel pump, the fuse on the ECU was blown! We need to look for him. The time is 24-00, we decided to resume repairs in the morning. I disconnected the battery terminals in order to reset the error, took a taxi home... The morning is wiser than the evening))

Disconnection methods

There are several ways to remove the engine start lock by disabling the immobilizer.

Code deactivation

Emergency shutdown of the immobilizer is provided for by the standard factory procedure. The instructions were developed by manufacturers of domestic cars and are included in the vehicle documentation. If you carry out this process, the anti-theft system will turn off until the next time the ignition is turned on. The system allows the engine to start within 5 seconds after it is turned off.

For example, when locked, the Priora will start if the driver has activated the immobilizer emergency shutdown function in advance and written the access code into the system memory. The driver performs the manipulations by turning the ignition on and off, pressing the accelerator pedal according to a given algorithm.

Using a spare key

When placing a spare key in the car, you can disable the anti-theft system yourself. To do this, you need to find a place as close as possible to the pump circuit of the chip, and attach a spare key with an encoded chip there. When you turn on the autostart system or start the engine with a simple key, the system will always detect the presence of a chip in the car and start the engine.

Use of special programs and devices

You can disable the immobilizer on a Man car only using a programmer and a computer. Using special software, the chips of the electronic engine control unit are interrogated, information about the presence of an immobilizer is cut out from them, and the car’s brains stop responding to its signals.

To reflash the control system of a domestic car, it is necessary to dismantle the unit, disconnect it from the electrical circuits, and disassemble it. Resolder the resistance on the board with electronic components; this will allow the unit to be switched to rewrite mode. Using a computer connected via an adapter to the board, perform flashing. Return the resistance to its original place, ensuring that the reading mode is turned on.

Installing the emulator

The standard immobilizer can be disabled by installing an emulator. The emulator, which is triggered when the remote autostart is turned on, will ensure that the ignition system is turned on and will allow the car to warm up before the owner arrives. Its design copies the pump loop connected through a relay with a diode to the immobilizer circuit. The chip is placed in the loop, and the entire system is mounted behind the panel. When the ignition is turned on, the anti-theft system always detects a chip with the correct code and does not block the engine.

Repair immobilizer Audi A4 B5, Repair immobilizer.

I made the car, sent the ECU to the capital city of Moscow, they turned off the immobilizer, it was a mistake, they couldn’t register the keys with us, Americanservice did everything, they also removed the 2nd lambda and the secondary air supply. In this video I correct a mistake when soldering wires.

Hello. I soldered electrical wires. dismantled the original plug. Radbo soldered iron heated to a temperature must be pulled from the power socket. so that the electric charge of the soldering iron is plugged into the socket can damage the car a controller. The problem immobilizer for bad contact in a standard plug.

The immobilizer does not detect the key. The car stopped starting

Today we have to discuss a very important problem for modern motorists. This is one of those unpleasant breakdowns when the electronics fail, forcing the owner of the car to find himself in a very uncomfortable position. We are talking about situations when the immobilizer anti-theft device stops seeing the key. And the main problem in this situation is the inability to start the car engine. It just so happens that a huge number of car owners are faced with this problem, however, only a few know what to do and what to do if a breakdown occurs.

First, let's talk about the immobilizer device. We will not describe the characteristics in detail in this article. In simple words, an immobilizer is an anti-theft device that allows the engine to start only with a special key. If someone manages to hack the alarm and pick up the key, then the attacker will definitely not be able to start the engine. The immobilizer detects the presence of a special chip with a digital key-password, which allows the anti-theft device to “understand” who got into the car. Serious problems can begin due to the fact that the immobilizer can simply “count” that they are trying to start the car with a different key.

The situation turns out to be very unpleasant, especially when a person is in his own car and cannot start it. It happens that the immobilizer does not recognize the presence of a key occasionally, and after making a couple of attempts to “insert the key, then take it out,” the engine finally starts, but the problem has made itself felt and must be eliminated immediately.

The question immediately arises: “What is the problem of the immobilizer not working correctly?” The whole problem is an error in the immobilizer reading data from the key. The ECU, that is, the electronic control unit, is programmed to work with the “native” key or with its duplicate. You can start the engine only if there is a 100% match of the code value that is registered in the central system of the unit.

Important to know: In the absence of a main source where the signal comes from and where the receiver itself is located, the electronic control unit of the device will not be of much importance. All 3 immobilizer elements are connected to each other, the system itself operates in a very quiet mode in a specific way. The owner of the car carries with him a special key with a transmitter chip built into it, a kind of electronic circuit. As soon as the receiver recognizes this key, the system will immediately start the engine and the car will be disarmed. A special PIN code that is written only once at the factory is unique. This code can only be recognized by the master key and the receiving device. Sometimes even the car owner himself does not know the location of the receiver, unless, of course, he purchased it separately and installed it himself.

Does Grant have an immobilizer?

When choosing a future car, many people wonder what anti-theft systems it will be equipped with. One of the most popular such devices today is an immobilizer. This type of anti-theft electronic device literally means “immobilizer” in English.

The principle of operation of the immobilizer

This device is equipped with a function that allows it to break electrical circuit connections in the most important places in the car’s electrical system, such as the ignition system, starter, and the engine itself. When it is activated, you can be sure that the vehicle will definitely not leave its parking lot. Even if the thief is able to open the door and get inside, the car will simply not be able to start.

If you add a couple of additional devices to this anti-theft system, for example, solenoid valves, then you can also block the operation of other, non-electrical systems of the car.

The owner of such a car uses a code key to activate and deactivate the car. If this password is known only to the owner of the car, it is simply impossible to steal it. Therefore, under no circumstances should you give the key to the system to anyone. Usually an electronic key is used, but in rare cases there may be a system with manual dialing of numbers.

How to fix the problem?

1. The first option is to try using an additional key to start the vehicle. In theory, every owner of a car with an immobilizer integrated into it has a spare copy key with which the engine is started. If the car is able to start immediately after detecting the presence of the correct key, then the problem is that the main key is broken or malfunctioning.

Note: If you only have one key, you should be extremely careful with it so as not to lose it. Restoring it will cost the driver a fairly large sum. You will have to seek the services of dealers to create a kind of “crawler key”.

1. Solution number two. If, after trying to use the spare key, the immobilizer continues to act up, you will have to seek help from professionals to reprogram the unit system. The principle of operation is this: an additional key is purchased, then it must be combined with the “native” electronic control unit. To carry out this procedure, you need a special PIN code, issued after purchasing the car. The problem is that the coding is issued once, and if you did not purchase the car from an official center and they did not tell you the code, then you need to go buy a new control unit.
2. The third version of the problem may occur if the receiving antenna through which the main unit receives the signal malfunctions. Sometimes the receiving antenna malfunctions if its contacts are damaged. The antenna, in this case, is unable to determine the authenticity of the key. The receiving antenna is located in the cabin itself in the place where the ignition switch is located. In this case, to activate the contacts, you can move the ignition switch. There are cases in which oxidation of contacts occurs; in such cases, a special mixture of WD-40 will help. But the most optimal would be to purchase another antenna or lock.
3. The fourth solution to the problem is to purchase a so-called immobilizer bypass. You can purchase the device either at a car dealership, or you can assemble it manually. In case number two, you will need experience working with electronic devices, as well as a chip device or chip.

There are other problems associated with the negative operation of the anti-theft device. For example, some users complain that the immobilizer beeps and the light on the device blinks continuously. Fortunately, this is not such a serious problem. Sometimes, every ten or twenty minutes, the beeper makes an unpleasant squeak, and the immobilizer light constantly blinks at this time. To fix this problem, it will be enough to replace the batteries in the key fob with others. After this, the immo will stop constantly beeping and flashing.

We believe that after careful consideration of the issue, this problem has finally exhausted itself. There are also other methods for solving the problem of immobilizer malfunction, but we tried to talk only about the most effective solutions. After several unsuccessful attempts to correct the situation on your own, it would be better to seek help from specialists. Immobilizer repair services are not cheap, however, this way you “will cause much less trouble.”

An immobilizer (or otherwise immobilizer) has become a mandatory device in cars since the 90s of the last century. It prevents the engine from starting with a non-original key in case of car theft or unauthorized entry.

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In the practice of operating a car, there are often cases when the original key is inserted into the ignition switch, but the immobilizer does not see it (refuses to recognize it), the car does not start, or it starts and stalls after a few seconds. What to do in such situations?

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Activation of the electronic anti-theft device

The Lada Granta immobilizer is installed on all models, starting with the standard version. The Granta became one of the first Russian-made cars to be equipped with an immobilizer as standard. And the first problem that the owner of the newest Grant faces after he finds out why the “immobilizer” is needed is the activation of the anti-theft accessory. Typically, the controller is activated by specialists from the car sales center in the presence of the owner.

If the client refuses to activate the immobilizer, a note about this is written in the service book. When the owner, some time after purchasing the car, changes his mind and decides to activate the device, he will have to do it himself. The main thing is to correctly follow the activation method to avoid possible problems. Lada Granta is delivered to the owner with a set of keys, among which are two for the ignition, one of them is marked black, the other reddish.

The dark key is used for daily use; it must be entered into the immobilizer memory for smooth starting of the engine. The red key, the so-called training key, is designed to enter the initial code into the controller’s memory. After activation has taken place, it should be hidden in a safe place and taken out only when necessary. If the red key is lost, all dealer warranties become void.

Disabling the immobilizer on Lada Kalina

The video shows the process of disabling the immobilizer on a car using the Scanmaster CAN device.

Lada Granta Liftback standard immobilizer (LADA GRANTA chronicles)

Judging by the reaction of the salon employees and the fact that they apologized to us repeatedly, a memory was created...

Activation is carried out with the car doors closed; there should be no keys in the ignition. You need to insert the red key and turn on the ignition. Wait 6 seconds. If everything is done correctly, the reddish immobilizer light should blink on the dashboard. After which the owner has 6 seconds to remove the reddish key, insert the dark one and turn on the ignition with its help. The “immobilizer” should make sound signals, first three, then two more.

If this does not work out, everything needs to start over. When everything is correct, the dark key changes to a reddish color within 6 seconds. The sound signals should repeat: three, then two. They (the reddish ones) turn on the ignition, after which a single sound signal should follow. Turn off the ignition and within 6 seconds turn it on again for 2-3 seconds. Turn off the ignition, the red key remains in the lock. After three beeps and one light sound, 10 seconds count down and the red key is removed.

The principle of operation of the immobilizer

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The immobilizer system includes the following devices:

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• chip built into the key;
• an inflator loop, usually located near the ignition switch or card reader (if a card is used as a key);
• in some cars, a radio channel operating at a distance of up to 5 meters is used to poll the chip;
• immobilizer unit;
• the engine control unit.

Bottom line

If the Lada Granda started and immediately stalled. The most common reasons:

1. Damage to the ignition coil connections. Needs to be repaired or replaced with new ones.
2. Low fuel pressure.
3. Poor sealing in parts of the catalytic manifold or receiver.
4. Poor performance of the engine control system.

The Lada Granda has many design flaws, but if you know all the weak points of this car, then finding the cause of the breakdown will not be difficult. Carefully monitor your car, undergo regular maintenance, replace parts in a timely manner, and the Lada Granda will serve you for many years.

https://mylada.net

The main reasons why the immobilizer blocked the engine from starting

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Reasons for failure to start the engine associated with the immobilizer system may be:

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• malfunction of the native key chip;

• a dead battery in the key (if the chip has an autonomous power supply, in most cases the performance of the chip does not depend on the battery, since it is a small autonomous crystal placed in a ceramic case without any leads);

• breakage of the pumping loop or disruption of electrical connections to it;

• malfunction in the power supply circuits of the immobilizer unit;

• failure of communication between the immobilizer unit and the engine control unit;

• “failure” of the firmware of the engine control unit, immobilizer, which can be associated with a powerful electromagnetic pulse;

• malfunctions in the power supply of the engine control unit;

• an attempt to start the engine with a non-original key;

• discharge or disconnection of the battery terminals, especially when the ignition is on.

Video - what you can try if the immobilizer does not see the key on a Nissan Almera:

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A large number of reasons why the immobilizer system leads to failure to start the engine require a strictly defined algorithm (sequence of actions) to identify a specific faulty unit.

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Immobilizer bypass programming procedure

Immobilization bypass procedure for Lada Granta cars

This procedure is used to start the engine without reading the code key in the event of a malfunction of the immobilizer. The algorithm for performing immobilization bypass is recorded in the non-volatile memory of the engine control system controller (ECSC). You can use the immobilization bypass procedure only after recording an individual numeric code (password) in the ICS. The car owner can change the password an unlimited number of times by entering the numeric code into the ICS. Initially, the KSUD is supplied with no programmed password, i.e. bypass procedure is prohibited.

1 Entering a numeric code into the KSUD

1.1 Prepare a set of ignition keys consisting of a working key (with a completely black head) and a training key (with a red insert). 1.2 Close all car doors. Insert the learning code key into the ignition switch. Turn the ignition on and off. The system status indicator (LED) should flash quickly. 1.3 Until the LED blinking stops (within 6 s), remove the training key from the ignition switch, insert the working key and turn on the ignition. The buzzer on the anti-theft control unit should emit three beeps. 1.4 Wait with the ignition on until the buzzer emits two more sound signals, then turn off the ignition. 1.5 Until the LED blinking stops (within 6 s), remove the working key from the ignition switch, insert the learning key and turn on the ignition. 1.6 The buzzer should emit three beeps. Wait with the ignition on until the buzzer emits two more sound signals. 1.7 Turn off the ignition without removing the training key, wait until the buzzer gives a single sound signal. The LED should blink twice as fast. 1.8 Turn on the ignition with the training key while the LED is flashing. The Check Engine (CE) light should be on. 1.9 Wait 1 minute until the CE goes out. 1.10 Enter a six-digit code number consisting of numbers from 1 to 9 (the minimum possible number is 111111, the maximum possible is 999999). 1.10.1 Entering a code number: press the accelerator pedal all the way, hold the pedal pressed for no more than 3 seconds. The number of presses on the accelerator corresponds to the entered number. The CE lamp lights up to confirm each press. 1.10.2 Recording a code number: press the accelerator pedal and hold it pressed until the CE lamp goes out (≈ 5 seconds). Release the accelerator pedal. * 1.10.3 Enter the remaining five digits of the code following the steps in paragraphs. 1.10.1, 1.10.2 5 more times in a row. 1.10.4 If, after entering the last digit of the code and holding the accelerator pedal pressed for more than 5 seconds, the CE lamp: - does not go out, then the password entry has been completed correctly; — starts blinking at a frequency of 1 Hz, which means an error occurred when entering the password. You need to turn off the ignition and repeat the procedure again from step 1.2. • Attention! If, after entering the code number and holding the accelerator pedal down for more than 5 seconds, the CE lamp begins to flash at a frequency of 1 Hz, it means that an error occurred when entering the number (for example, you pressed the accelerator more than 9 times or exceeded the waiting time (1 minute) even once without pressing the accelerator). You need to turn off the ignition and repeat the procedure again from step 1.2. 1.11 Exit from the password recording mode in the ICS occurs when the ignition is turned off. If entering the password is not completed completely, it is not saved. 1.12 The immobilization bypass procedure is prohibited if, after performing steps 1.2...1.9, you press the accelerator pedal and hold it pressed for more than 5 seconds. If the immobilization bypass procedure is prohibited, the CE lamp will remain on continuously with the ignition on all the time until the engine starts.

2 Perform a walkthrough

2.1 Turn on the ignition. The control system prohibits the engine from starting (the immobilization function is enabled). CE is constantly on. 2.2 Wait 1 minute until the CE goes out. If this does not happen, then the procedure for bypassing immobilization in the CSUD is prohibited. 2.3 Enter your password code in accordance with clause 1.10 (see above). 2.4 If, after entering the last digit of the code and holding the accelerator pedal pressed for more than 5 seconds, the CE lamp: - does not go out, it means the code was entered correctly, you can start the engine. — starts flashing with a frequency of 1 Hz, which means the wrong password has been entered, the bypass procedure must be repeated, turning off the ignition, starting from paragraph 2.2 2.5 If the bypass is performed correctly and the engine starts, the CE lamp goes out after the engine starts. 2.6 The CSUD operates in the immobilization bypass mode until it is completely turned off, which occurs 5 seconds after the ignition is turned off. The engine can be restarted if no more than 5 seconds have passed since the ignition was turned off. If more than 5 seconds have passed since the ignition was turned off, then starting the engine becomes impossible and the bypass procedure must be repeated again.

Signs that the immobilizer is preventing the car from starting

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The main signs of a malfunctioning immobilizer system:

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• indication of a blinking LED on the car’s dashboard, which was not present in normal mode when the ignition was turned on;

• glowing “key” icon on the dashboard or LCD display of the on-board computer;

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• a message including the words “Key”, “Secret”, “Immobiliser” on the on-board computer display;

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• blocking the rotation of a working starter.

The immobilizer malfunction only appears when the engine starts. If the engine stalls while driving, this cannot be due to immobilizer problems. After correct interrogation of the key, the immobilizer “gives the go-ahead” to start the engine and ceases its functions until the next start.

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Ignition coils

Custom ignition coil

The Lada Granda has two types of ignition coils: individual and four-terminal, they are controlled by the engine controller.

One of the signs of poor coil performance is poor idling, a drop in power and high gasoline consumption. The car starts poorly or stalls.

If the coils are partially broken, then paired misfires and ignition in the cylinders often occur. To remove the coil, you need to reset the terminals from the AMB and remove the leads from the controller. Then disconnect all high voltage wiring.

After this, the coil must be disconnected from the bracket by unscrewing the mounting screws. If you plan to replace the coil, make a note of its markings.

There are several ways to test the coil for faults:

1. Testing a short to ground. To do this, using an ohmmeter, you need to connect the wire from the coil to the first end of the ohmmeter, and the body to the second. It should show an infinite value, if you see a specific value then there is a leak.
2. We check the primary winding for a break. To do this, you need to connect the ends of the device to the contacts; if the device shows an infinite value, then one of the coils is broken and needs to be replaced with a new one.
3. We check the secondary winding (for a 4-lead coil). To do this, first test the winding on the 1st and 4th cylinders using an ohmmeter. If it shows an infinite value, then the coil is working. Repeat these steps with the winding on the 2nd and 3rd cylinder.
4. Checking high voltage wiring. The wires are checked one by one. To do this, connect an ohmmeter to the wire, measuring the resistance with a maximum value of 20 kOhm. The normal value is approximately 3 to 8 kΩ. If it shows infinity, then the wire must be replaced. It is advisable to carry out such a check annually.

After installing the coils in their place, you must strictly observe their markings; the cylinder number must match the number on the wire.

What to do in such cases

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If there is a suspicion of a malfunction of the immobilizer system and the corresponding symptoms, the most correct thing is to conduct computer diagnostics. It will definitely give a message about a malfunction of the immobilizer system or blocking of the engine control system.

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In some car models, for example Daewoo Matiz, a faulty immobilizer sometimes does not allow diagnosing the engine control unit.

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Video - a possible reason why the immobilizer does not allow the car to start:

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If it is not possible to make an emergency diagnosis, you can apply the following troubleshooting algorithm:

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1. Check if the chip from the original key has been lost. Perhaps a child dropped the key, then collected it, the chip rolled somewhere. To do this, you need to disassemble the original key.

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2. If the inside of the key has an electronic circuit and a chip connected to it, the key’s battery may have run out, it is better to replace it with a similar one just in case.

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3. If you have an additional key or a duplicate, you can try to start the engine with it.

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4. If there is no duplicate, you need to make sure that the chip is working. Its firmware may crash randomly. This operation will require special equipment. You can use the services of car key duplicate manufacturers; this service is inexpensive. The key is placed in the field of the coil and the code is read. If the chip is not working, the code is not displayed, the chip must be replaced.

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5. The next step is checking the pump loop. To do this, you can use a homemade loop with an LED connected to it. It is placed in the operating area of ​​the pumping loop located on the ignition switch. When there is a polling signal, the LED will blink.

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The loop can be “ringed” using a multimeter; its resistance is usually in the range from 20 to 500 Ohms. A broken loop or short circuit leads to a failure to read the code; the loop must be repaired or replaced.

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6. The next stage of testing is monitoring the voltages supplied to the immobilizer unit. Usually it receives a negative power bus, plus 12 Volts on bus 30 (constantly) and +12 Volts on bus 15 (via the ignition switch). The pinout of the immobilizer unit may be different, but these voltages must still be supplied. If they are missing, it is necessary to check all fuses (if it is not known which ones are responsible for supplying power to the immobilizer). As a rule, they are located in the interior fuse box.

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7. Proceed in the same way when checking voltages in the power supply circuits of the engine control unit. This is easier to do, since it is easier to find the fuses responsible for its operation.

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8. Sometimes, if the engine fails to start, temporarily disconnecting the battery terminals (for at least 15 minutes) helps.

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Engine and spark plugs

Often candles simply flood, especially in winter. This could be due to a weak battery spark, wiring problems, or unsuitable spark plugs.

The most primitive way to dry them is to press on the gas and crank the engine for 10 seconds using the starter.

But in winter this rarely helps, and the candles need to be dried. To do this, they need to be removed and thoroughly cleaned of dirt. This can be done with a toothbrush. In this case, you need to leave the same gap of 0.7-1 mm.

After cleaning, the candles need to be dried. This can be done using a hair dryer. Thrifty and experienced drivers recommend carrying spare spark plugs with you and, if necessary, simply replacing them on the road. To reduce the risk of flooding, monitor the battery charge and once every three days, load the engine up to 5000 rpm for a few seconds. for cleaning and preventing contamination.

Special Problem Solving Techniques

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When replacing a car engine during repairs at the same time as purchasing a contract engine and engine control unit, it is necessary that the kit includes an immobilizer and a chip for it. In this case, the process of replacing the engine will be simple. A new engine and control unit are installed, the immobilizer is replaced and a new chip from the kit is reinstalled.

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This option is possible: purchase an immobilized engine control unit. In this case, you can throw away the chip and immobilizer altogether and forget about problems with the key forever.

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If you have the skills to flash microcircuits, you can “upload” immless firmware into some engine control units yourself. To do this, find the location of the eeprom memory chip on the Internet.

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Then the microcircuit is unsoldered from the block, placed on the programmer, and new immoless firmware (IMMO OFF) is written (uploaded) into it, which can be found on the Internet. Then the chip is soldered back into the circuit. This operation can only be performed by professional electronics engineers using special equipment. If you do not have such skills, you should contact specialists.

Fuel system

It happens that the tank simply runs out of gas, do not forget to monitor its level. You also need to pay attention to its quality. Due to low-quality gasoline, spark plugs often flood, the filter becomes dirty, and moisture forms.

If you have filled in with low-quality fuel, then in this case you need to remove the gas tank and change the coarse and fine filters, you can try to blow out the fuel pipes.

If the injectors are dirty, they can be cleaned using any available method. When there is a lot of water in gasoline, you can add a little alcohol to the tank.

But if there are a lot of impurities and dirt, then only strong cleaning will help. You see that the starter is spinning, but the engine refuses to work and you can’t hear the fuel pump pumping. It may fail, there is no tightness in the power system or the pressure regulator is malfunctioning.

The first thing you need to do is check the pressure in the rail, the normal value is 3.5-4 atmospheres.

Then you need to remove the hatch and measure the voltage in the connector; the light bulb can be inserted into the two terminals in the middle and cranked with the starter. It should light up and if the voltage reaches, but there is no pressure, you can try to hit it. The brushes could simply be stuck. If they are normal, then the coarse mesh may be clogged, it needs to be cleaned or replaced; in winter it may freeze up.

If electricity is not supplied, you need to check fuse F21 and relay k12. The relays (power coils) need to be removed, tapped on them a little, or simply warmed thoroughly in the palms of your hands.

How to make a crawler yourself?

Any immobilizer bypass imitates a signal received for unlocking. You can make the device yourself using a control relay, a complete tag, a second key and a wire.

1. The key and tag perform the task of simulating engine unlock signals.
2. An electromagnetic coil is made from wire, with the help of which access to the on-board network is provided.
3. The control relay automatically sets the unlocking response time.

Everything should work by default when the module is active or automatically.

Linemen

As usual, immobilizer scanners are installed at service stations. They can also completely disable the protection system, but this must be done by good specialists, since here they will have to interfere with the operation of the electronics.

The essence of the work of the crawlers is that through them, bypassing the immobilizer, the necessary contacts are closed, thereby allowing the engine to be unlocked.

Common types of crawlers:

1. For RFID systems;
2. For VATS systems.

In the first case, the crawler is a device simulating a key, a control relay and an antenna. It is designed to work with RFID modules.

A transponder with an imitation key is installed in the car interior, as close as possible to the immobilizer module. Both regular and additional antennas can be installed to enhance the signal.

In the second case, it is important to understand that in the VATS system the engine itself is not blocked, but the electrics and fuel system are blocked.

A resistor is connected to the blocking circuit, which should have a resistance no higher than 5% than that of the analogue located in the ignition key.