Immobilizer
an article by Martin Hvizdak, please see the annoucement
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Immobilizer is a passive safety device that disconnects the vehicle only, with a few contacts, selected electrical circuits. The technical parameters of these devices is the maximum number of jet-load circuits disconnected. Immobilizer is an electronic locking device with a primary function to protect against car theft, but not rob or car damage. Its principle is the suspension of a rule of three electronic circuits important for launching the car (such as ignition, injection unit, pump, transformer ...). Owner car accompanied by (or approaching), electronic key and connect the circuits to go. The effectiveness of the immobilizer is extremely dependent on the quality and the sophistication of assembly. Everything depends on which electronic circuits, especially as the immobilizer disabled. The electronics in the car easier (older cars), the more professional installer required. If the car start to pull enough cable from the battery to the induction coil and the car curb, immobilizer you unnecessarily. The usual three circuits and impossible burden 10 to 30 A, or various combinations of these values. This allows the immobilizer to stay as power fuel pump, starter control coils, ignition or block electronic unit injector. Another parameter is how the immobilizer control. Immobilization is often carried out by adding a contact chip encoding the reader.
Immobilizer, as additional security installed, is now almost 'extinct' safety device. A few years ago were fitting immobilisers very common and popular but now almost all new cars are already equipped with immobilizer serial production. It is now mounted immobilizers only a few new cars and old cars.
Comfortable alternative to control the chip is incorporated into the key from the ignition. His power and code is then read out a special induction coil placed around the ignition. Convenient in terms of operation are remote with immobilizers, which themselves are made up of some functions otherwise reserved to expensive car alarm (door locks central control electronics, optical signal switching on and off, an extension of interior lighting, etc.). The general advantage of immobilizer lower acquisition costs and easier installation in the vehicle. The disadvantage is that it is a silent device that monitors the status of the vehicle. As the thief overcomes door latches, no it does not interrupt or steal a vehicle from a continuous search space for installing these devices and overcoming them. The disadvantage of contact immobilisers, including types built into the ignition key is their easy contouring.
Car immobilizer is a device whose function is to automatically disengage some important areas of the vehicle. As a result of this disruption or interruption, that is, depending on how much lap immobilizer is installed in the car is also forbidden to run the vehicle. Immobilizer itself does not carry a built-in signal to do that is undermined its sovereignty territory, it is for the alarms.
After pushing the ignition key to automatically turn it should start the engine and then it would no longer be any problem for the running of the car. This is how it worked in a vehicle that does not provide car immobilizer. Vehicle to install an immobilizer in this act fails to engage the circuit, which would be guaranteed, or fails to deliver fuel to the fuel pump or disconnected control unit ... and here we could designate additional districts, which could also be somewhat disconnected. Among the most important circuits are interrupted by the starter circuit, fuel pump circuit, other circuits are flashing lights, it means that the car does not show outward light signaling. To this end, we used an immobilizer key, which is necessary (of course depending on the type and product type) inserted in or attached to the so-called. lock immobilizer. This step will ensure the connection of all necessary lines and then can continue to be learned vehicle control. Long period of development of security devices, found that "confessor circumventable security devices" have matured to the different types and therefore also produces increasingly sophisticated production and hence more difficult to overcome the equipment. Here, based on immobilizers fixed code to the possibilities unrepeatable combination of digital codes which are generated at random to 280 trillion digital combinations. If anyone wants to deal with generating of correct code, it probably would have lasted a bit longer.
Electronic keys are the producers trying to produce as possible, nothing has been threatened by their functionality, ie no battery in the key, no extra lines, so that was practically indestructible. Some types of immobilizers are unable to control one key vehicles more. According to the instructions for use but only with the help of the original key, it is possible to increase the number of keys. Similarly, if you lose the key, using the original key is lost from the memory erased. If it is then lost the key and found in such condition as it is currently useless to you. First, it is necessary to program and again can serve its function. How to activate the device is running, it is not ... These issues will be resolved in an immobilizer for a short time alone. Security equipment is self-activated during 30 seconds. On a similar principle operates most modern security immobilisers are currently supplied by the manufacturers. If the thieves get the immobilizer control unit and remove it from the vehicle, many vehicle immobilizers protected by more point restraint, and short circuit simply will not work again and need your key immobilizer. The advantage of the many immobilisers is that when you submit the cart into service, the key you do not ever put together with car keys, only to be shut down immobilizer service mode.
Many car manufacturers is now supplying cars already on sale with a built in immobilizer key. They are individuals who are satisfied with this provision, but there are some who will still be retrofitted immobilizer a renowned brand.
Additional features immobilizers: Anti scan-interference experiment to emulate the control code, possible, emergency release, again locking the vehicle if one fails in a certain time, extension internal lighting.
This article has been written by Martin Hvizdak. If you found any error or inaccurancy here, please
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