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Key Fob Replacement and Reprogramming - Why Your Car Won't Start
Most cars are equipped with an immobilizer to prevent theft. If your vehicle doesn't start after inserting the key fob it could be due to a problem with a transponder which isn't sending a security signal to the immobilizer.
This is a simple fix for any auto locksmith in Gold Coast. Let's look at the various components of your vehicle's immobiliser to see what you can do.
Battery
If you're involved in the auto repair industry, it is important to focus on your shop's revenue and cost-saving opportunities. You can accomplish this by offering key fob replacements and reprogramming to your customers. This will not only benefit your customers but also increase your shop's profits without having to sublet to the dealership.
Typically the key fob battery powers the remote key repair locking and opening systems. However, it doesn't power the immobiliser. The immobiliser is powered by a transponder located in the fob, key or instrument cluster. The chip transmits a code from the fob or key to the immobilizer unit of the car, which can be integrated into the PCM (power control module) or BCM (brake control module for brake control), instrument cluster, smart junction boxes, or standalone modules. The system then verifies the code to ensure it is correct. If the code isn't correct the system will disable components that are essential to starting the car, such as the ignition motor or starter motor. The car will be impossible to start if the driver doesn't have the right key.
Since its inception the immobiliser has proved to be an extremely effective tool in reducing car key repair service key immobiliser repair (Technetbloggers post to a company blog) theft. However thieves are always trying to get around these security measures. One of these strategies is the Kia Challenge trend on TikTok that shows how simple it is to connect hot wires to an vehicle.
Insurance companies are now incorporating the use of an immobiliser in calculating premiums. This makes it more attractive to buy a car with this feature. Even cars equipped with an immobiliser might be prone to problems. 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 could uncover the problem. If the problem persists then it could be due to electrical issues or wiring issues. It's best to seek out a professional to diagnose the problem and fix it.
Transponder Chip
In vehicles manufactured after 1995, a tiny electronic chip, referred to as transponder is embedded in the head of your car key. Also known as a chip key' or a 'transmitter and responder key, it is designed to stop the engine from starting if another person has an exact copy of your car key. It works by transmitting an audio frequency signal from the key to the immobiliser system inside your car. If the code in the car's computer matches that signal sent from the key, it will disarm the immobiliser and allow the engine to begin.
The key with the transponder is also called a "fob" or a "smart" key, as it is more difficult to copy than a mechanical key. Using special techniques, it is feasible to copy a conventional car key, but not transponder keys. Unlike the remote central locking element of a conventional key which is powered by batteries, a transponder chip is powered by an infrared (IR) signal transmitted by the antenna ring on the ignition cylinder.
To activate the transponder chip the ignition cylinder must be turned to the ON position. The ring emits a burst of IR energy that is picked up by the microchip in the key. The chip responds with a unique code to the immobiliser in your car. The car's computer compared the code stored in its memory with the one from the transponder chip, and If they are compatible the engine will be able to start.
If the immobiliser detects an unauthorised transponder, key or other device is being used it will shut down the engine and stop the essential components from functioning. Without a functioning engine, the vehicle won't be able to move and it would be very easy for criminals to hot-wire the vehicle and then drive off. This is a powerful way to deter crime, and is one of the reasons why it's important to have your car key immobiliser repaired when you spot any issue with it. If you don't, the security light in your vehicle will continue to flash and it will be inaccessible for you to start your engine.
Security Light
The immobiliser uses a small battery to send an electrical signal to the chip that is in your key. This is an anti theft device that stops anyone from opening your vehicle without the correct key. If the system is not able to recognize a digital serial number from the chip in your key, it will shut off the engine immobiliser, which will stop the car starting.
The car immobiliser system is an an effective way to stop thieves, however it can get out of sync with the key or transponder chip. This can be caused by interference or the system becoming too sensitive. This may require an adjustment. To do this simply disconnect the battery. Then leave it off for around 15 minutes before reinstalling it and start the car. This will reset the key system so that it is ready to accept your keys repair once again.
The security light is the car immobiliser's method of letting you know that there is a problem with the system. If the light is on when you try to start your vehicle, it indicates that the code stored in the ECU is not compatible with the chip in the key. This can occur if your car key was replaced with an alternative key that is not programmed for the vehicle, or if the ECU was swapped in a wrong manner.
If this is the situation you should take your key or transponder chip to a professional to have them correctly programmed for the vehicle you are driving. It's possible that the system won't accept the key due to a software upgrade or bug. To test, put your key into the ignition and turn the ON position. Don't try to start the car. Keep the key in this position for 10 minutes. The security light should turn on, and then go off. If it doesn't then you'll have to repeat the process and wait another 10 minutes. This should solve the issue when you repeat the process three times.
Programming
The car immobiliser blocks the engine from running if the fob or key are not properly programmed. It utilizes a specific RFID chip that cannot be copied and is equipped with a digital serial number. The immobiliser will disengage in the event that it doesn't recognize the code. It's hard to beat.
Modern cars have this system as standard. This makes it really hard to connect the car to a hot wire 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 hasn't been a compromise in the code. The system will not allow the vehicle to start if it does not receive the correct code, and some models will even inform the owner if someone tries to use a wrong fob or key.
The system isn't completely 100% secure, however. Some thieves have gotten around the immobiliser with techniques such as 'hot-wiring.' This involves crossing the wrong wiring in a vehicle in order to trick the ECU. However, this method is quite risky and requires a lot of experience in order to accomplish it without cutting yourself. In addition, many modern car thieves have shifted over to more advanced methods like using specialized apps or Bluetooth to take over the car's information and remotely control it from their phone.
Car owners often see warning lights that indicate an immobiliser malfunctioning. This could be due to a variety of reasons, but the most common reason is a defective battery in the keyfob. The issue can be solved by an easy replacement.
If this isn't working the transponder chip could be defective or not compatible with the ECU. This is more complicated to determine and fix, as it can involve a specialist car locksmith or dealership. The car immobiliser could also be damaged if water is able to get into the system or if it is physically removed from its fob or key. If you experience any of these problems it is a good idea to consult a local car dealer or garage for assistance.
