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Immobiliser

Immobiliser is the electronic security device that does not allow the engine to be started unless the correct key is inserted and it is mandatory in all vehicles in modern times.

 

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Immobiliser is part of car’s security and is an electronic security device that is fitted in a car and the engine does not start unless the correct key is inserted. This eliminates the hotwire of a car once the entry is gained. Of late, Immobiliser has been made as mandatory in all the cars around the world. Earlier cars came with static code in the ignition key that was only recognized by RFID loop that is present around lock barrel and checked with the car’s ECU for matching of the code. If the code does not match, then the ECU will not allow the fuel and ignition will not happen. Now, modern cars come with rolling codes or advanced cryptography to prevent copying the code either from ECU or key. The car key has a microcircuit  in it which will be activated by small electromagnetic field which will make the current to flow inside the body and broadcasts the unique binary code for the car’s ECU to read and it if finds it to be the right code then it activates the fuel injection. Some of the vehicles will result in no start condition if it reads unauthorized keys whereas some other use the satellite or mobile phone to alert the security firm about the unauthorized attempt. Often, these information also records the following in the modern car’s ECU such as temperature, speed, driver weight, throttle position, geographic location, yaw angle, etc. This information is also useful during warranty claims, insurance investigation or technical troubleshooting.

 

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