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Key Fob Replacement and Reprogramming – Why Your Car Won't Start Today, the majority of vehicles are equipped with an engine immobilizer in order to stop car theft. If your vehicle won't start after inserting your key fob, it could be a problem with a transponder which isn't sending a security signal to the immobiliser. This is a straightforward fix that any auto locksmith on the Gold Coast can do. Let's take a look at the different parts of your vehicle's immobiliser and find out what you can do. Battery It is essential to focus on the profit and cost-saving potentials of your auto repair shop. One way to do this is to provide key fob replacement and reprogramming 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. 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 that is located in the fob, key or instrument cluster. This chip sends a passcode to the car's immobilizer unit which can be integrated into the PCM, BCM or instrument cluster, smart junction box or standalone module. The system then validates the code to make sure it is correct. If the code isn't correct, the system disables components that are essential to starting the car, such as the ignition or starter motor. This makes the car almost impossible to start without the correct key. The immobiliser system has proven extremely effective at decreasing car theft since it was first introduced. However car key fob repair are always trying to get around these security measures. One of these methods is the Kia Challenge trend on TikTok that demonstrates how easy it is to connect hot wires to an automobile. The majority of insurance companies now factor in the use of an immobiliser when calculating premiums, making it more attractive to shop for a car that already has this feature. Even cars that are factory fitted with an immobiliser might have issues. Fortunately, these issues are usually straightforward and affordable to repair. The majority of the time an immobiliser that is not working properly is caused by a dead or dying key fob battery. A quick diagnostic test could identify the issue. If the problem persists then it could be due to electrical issues or wiring issues. If this is the case, it's best to seek out a professional to diagnose and fix the issue. Transponder Chip A tiny electronic chip, referred to as transponder, is embedded into the head portion of your car keys. This technology was introduced in cars manufactured after 1995. Also known as a 'chip key or a 'transmitter and responder key, it's designed to prevent the engine from starting if someone else has a copy of your car key. It works by sending radio signals from the key to your immobiliser system. If the code stored in the computer of the car matches the signal sent by the key, the immobiliser will be deactivated and the engine will start. The key that has a transponder can also be referred to as a “fob” or a “smart” key due to the fact that it is more difficult to copy than mechanical keys. It is possible to duplicate a standard key, but not a transponder key. Transponder chips are powered by an infrared signal not battery power. To turn on the transponder, the ignition cylinder needs to be in the ON position. The ring emits a burst IR energy that is picked up by a microchip inside the key. The chip responds by sending a unique code the immobiliser of your car. The car's computer examines the code in its memory with the transponder's code and If the two codes are identical it will begin the engine. If the immobiliser detects an unauthorised transponder or key is in use, it will disable the engine and block any of its essential components from functioning. Without a functioning engine the car will not be able to move and it will be easy for a criminal to wire the vehicle and drive away. This is a powerful deterrent to criminals and is one of the main reasons why it is essential to get your car's key immobiliser repaired as soon as you notice an issue. If you don't do this, the security light in your car will continue to flash and it will be difficult to start your engine. Security Light The immobiliser is powered by a tiny battery that sends an electrical signal to the transponder chip inside your key. This is an anti theft device that blocks anyone from opening your vehicle without the right key. If the system cannot detect a digital serial from the chip on your key, it will shut off the engine immobiliser to stop the car from starting. This car immobiliser system is an effective way to stop thieves but sometimes it can be out of connection with the key or transponder chip. This could be due to interference or the system becoming too sensitive. If this is the situation, it could be necessary to reset. To do this, simply disconnect the battery. Leave it disconnected for about 15 minutes, then insert it and begin the car. This will reset the key system, so that it is ready to accept keys once more. The security light is a way of warning you of a problem. If the light is on when you try to start your car, it means that the code in the ECU is not compatible with the chip inside the key. This could happen if you have recently replaced your car key with another that was not programmed to the vehicle or if you've had a bad swapped ECU. If this is the situation, then it's time to talk to a professional to have the transponder or key chip properly programmed to your vehicle. There is also the possibility that the system isn't accepting the key due to an update or software issue. To test, put your key in the ignition and then turn it to the ON position. Do not attempt to start the car. Let the key remain in this position for 10 minutes. This should cause the security lights to light up and then to go off. If it doesn't then you must repeat this process and wait for another 10 minutes. Repeat this three times and the problem is likely to be solved. Programming The car immobiliser stops the engine from running if the fob or key are not properly programmed. It utilizes a specific RFID chip that is unable to be copied and is equipped with a digital serial number. The immobiliser will stop working in the event that it doesn't recognize the code. This is why it's so hard to beat. Modern cars are fitted with this security system in the standard configuration. This makes it very difficult to wire the car hot or use a different key as a starter. The system operates by sending a passcode from the key fob to the ECU. The ECU is aware that it's the right key and that there hasn't been compromised code. The system will not allow the car to begin in the event that it does not receive the correct code. Certain models will even notify the owner when they attempt to use an unapproved fob or key. However the system isn't impervious to theft. Some thieves have bypassed the immobiliser by using techniques such as 'hot-wiring.' This involves using the wrong wiring in a vehicle in order to cause a malfunction in the ECU. However, this method is pretty dangerous and requires a lot of experience to do it without cutting yourself. In addition, many modern car thieves have moved over to more advanced methods, such as using specialized apps or Bluetooth to hijack the car's information and remotely control it from their phone. Car owners will frequently be greeted by warning lights that indicate an immobiliser that has gone out of control. This can happen for various reasons, but the most frequent is a faulty or dead battery in the key fob. A simple replacement should fix this problem. If this doesn't work, the transponder chip might be defective or mismatched with the ECU. This is more difficult to diagnose and fix as it may require a professional locksmith or dealership. The car immobiliser could also be damaged if water is able to get into the system or is physically pulled away from its fob or key. If you experience any of these issues it is a great idea to consult an auto dealer in your area or garage to seek help.