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Key Fob Replacement and Reprogramming – Why Your Car Won't Start Most cars are equipped with an immobilizer that prevents car theft. If your vehicle isn't starting after inserting the key fob there could be a problem with the transponder chip not transmitting an authorization code to the immobilizer system. This is a simple fix for any auto locksmith in Gold Coast. Let's take a look at the different parts of your vehicle's immobiliser and discover what you can do. Battery It is crucial to concentrate on the cost-savings and revenue potentials of your auto repair shop. car key repairs to achieve this is to offer key fob replacement and reprogramming services to your customers. This will not only benefit your customers but also increase the profits of your shop, without having to sublet to the dealership. Typically the key fob battery powers the remote locking and opening systems. The immobiliser isn't powered by the battery in the key fob. The immobiliser is powered by the transponder located in the key, fob or instrument cluster. This chip sends a passcode to the car's immobilizer device which can be integrated into the PCM, BCM, the instrument cluster, smart junction box or standalone module. The system then verifies the code to ensure it is correct. If the code is incorrect, the system disables elements that are crucial to starting the car, like the ignition motor or starter motor. This will make the vehicle almost impossible to start without the right key. Since its inception the immobiliser has proved to be an extremely effective tool in decreasing car theft. Despite this it is not uncommon for thieves to look for new ways to bypass these security measures. One of these methods is the Kia Challenge trend on TikTok that shows how simple it can be to hot-wire an automobile. Most insurance companies now factor in the use of an immobiliser when they calculate rates, which makes it even more appealing to shop for a car that already has this feature. Even vehicles equipped with an immobiliser might have issues. These issues are typically simple and affordable to fix. A dying or dead keyfob battery is usually the cause of a faulty ignition immobiliser. A quick diagnostic test can reveal this issue. If the issue continues, it could be due to electrical issues or wiring issues. If this is the case, it's recommended to have a professional diagnose and repair the issue. Transponder Chip In cars made after 1995, a small electronic chip referred to transponder is integrated into the head of your car key. Also known as a chip key or a 'transmitter and responder key, it is created to stop the engine from starting if someone else has a copy of your car key. It works by transmitting an audio frequency signal from the key to the immobiliser system in your car. If the code in the car's computer matches the signal sent from the key, it will disable the immobiliser and allow the engine to begin. The key with the transponder is also called a “fob” or a “smart” key due to the fact that it is more difficult to duplicate than mechanical keys. It is possible to duplicate a traditional key but not a transponder one. Contrary to the remote central locking element of a conventional key, which uses battery power the transponder chip is powered by an infrared (IR) signal transmitted through the antenna ring on the ignition cylinder. To activate the transponder chip the ignition cylinder needs to be turned on. The ring emits a burst IR energy that is picked up by a microchip in the key. The chip responds by sending a unique code to your car's immobiliser. The computer in the car examines the code in its memory to the transponder's and If the two codes are identical, it will start the engine. If the immobiliser is able to detect an unauthorized transponder or key is in use, it will disable the engine and stop any of its essential components from working. Without a functioning engine the vehicle will not be able to move and it would be very easy for criminals to hot-wire the vehicle and then drive away. This is a great deterrent to criminals, which is why you should have your car's key-immobiliser repaired as quickly as possible in the event of a malfunction. If you don't, the security light in your car will keep flashing and it will be inaccessible for you to start your engine. Security Light The immobiliser utilizes a small battery to send an electrical signal to the chip that is in your key. This device is designed to prevent anyone from starting the car if they don't have the correct keys. If the system cannot detect a digital serial number from the chip in your key, it will disable the engine immobiliser, which will stop the car starting. This system for car immobilisation is an effective in stopping thieves, however it can get out of sync with the key or the transponder chip. This could be due to interference or a system that is too sensitive. If this is the case, it could be necessary to reset. To do this, disconnect the battery. Leave it disconnected for about 15 minutes then reinsert it and begin the vehicle. This will reset the key system so that it is ready to accept your keys again. The security light is an immobiliser's method of warning you of a problem. If you attempt to start the car but the light is solid on it indicates that the chip in your key isn't in sync with the code stored in the ECU. This could happen if have recently replaced the car key with another that isn't programmed to the vehicle, or in the event that you've had a defective swapped ECU. If this is the situation it is recommended to take your key or transponder chip to a professional for them correctly programmed for the vehicle you are driving. There is also the possibility that the system is not accepting the key due to an update or software issue. To test, put your key into the ignition and then turn it to the ON position. Don't try to start the car. The key should remain in this position for ten minutes. This will cause the security light to come on and then to go off. If it doesn't work, you'll have to repeat the procedure and wait another 10 minutes. This should resolve the issue when you repeat the process three times. Programming A car immobiliser prevents the engine of a car from running without a properly programmed key or fob. It uses a special RFID chip that cannot be copied and has a digital serial number. The immobiliser will be disengaged in the event that it doesn't recognize the code. This is why it's so hard to defeat. Modern cars are equipped with this security system by default. This makes it difficult to wire a car or use a different key for starter. The system works by sending a code from the key fob to the ECU. The ECU is then able to determine that it's the right key and that the passcode isn't compromised. The system will not allow the car to begin if it does not receive the correct code. Some models even notify the owner if they try to use a wrong fob or key. The system isn't impervious to attack, but it is. Certain thieves have been able to bypass the immobiliser using methods such as 'hot-wiring'. This involves using the wrong wiring in a vehicle to cause a malfunction in the ECU. However, this method is pretty risky and requires a lot of experience in order to carry out the procedure without electrocuting yourself. Modern car thieves are also employing more sophisticated methods for instance, Bluetooth or other specialized apps to steal a car's information and remotely control it remotely. Car owners will frequently notice warning lights that signal an immobiliser gone haywire. This could be due to a variety of reasons, but one of the most common is a faulty or dead battery on the key fob. The issue can be solved by replacing the battery. If this does not work, it could be that the transponder chip is defective or the ECU is not compatible. This is more difficult to diagnose and fix, as it can involve an expert car locksmith or dealership. The car immobiliser could also be damaged if water manages to enter the system, or if it is physically pulled away from its fob or key. If you encounter any of these problems it is a good idea to consult a local car dealer or garage for assistance.