Key Fob Replacement and Reprogramming - Why Your Car Won't Start
Nowadays, all vehicles are equipped with an engine immobilizer to stop car theft. If your vehicle isn't starting after inserting the key fob, there may be a problem with the transponder chip not transmitting a security code to the immobilizer system.
This is a simple 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 see what you can do.
Battery
It is essential to concentrate on the revenue and cost-savings opportunities of your auto repair shop. You can do this by providing key fob replacements as well as reprogramming your customers. This will not only benefit your customers, but also increase your shop's profits without the need sublet the dealership.
The key fob battery powers the remote locking and opening systems. The immobiliser is not powered by the battery in the key fob. The immobiliser is powered by the transponder in the key, fob or instrument cluster. The chip transmits a passcode to the immobilizer unit of the car which can be integrated into the PCM, BCM, instrument cluster smart junction box, or standalone module. The system checks the code to make sure it is correct. If it is not it is, the system will shut down parts that are essential to start the vehicle, such as the starter motor or ignition. This will make the car difficult to start without the right key.
The immobiliser system has proven extremely effective at cutting down on car theft since its first introduction. However the fact that thieves are always looking for new ways to get around these security measures. One of these techniques is an upcoming trend called the Kia Challenge on TikTok that demonstrated how easy it is to wire a vehicle.
Many insurance companies are now incorporating in the use of an immobiliser in calculating rates, which makes it even more appealing to purchase cars that already have this feature. However, even vehicles that were factory-fitted with an immobiliser can experience issues with it. Fortunately, car key repair near me are usually straightforward and affordable to fix. A dying or dead keyfob battery can be the reason for a malfunctioning ignition immobiliser. A quick diagnostic test can identify the issue. If the issue continues, 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 repair the problem.
Transponder Chip
In cars made after 1995, a tiny electronic chip referred to transponder is integrated into the head of your car key. Also referred to as a 'chip key or a 'transmitter and responder key, it's designed to prevent the engine from starting if someone else has the same key. It functions by sending an audio frequency signal from the key to the immobiliser system inside your car. If the code in the car's computer is in line with the signal transmitted by the key, it will disable the immobiliser and allow the engine to start.
The key with a transponder can also be referred to as a "fob" or a "smart" key, because it is more difficult to duplicate than a mechanical key. Utilizing specific methods, it is possible to duplicate a standard car key, but not transponder keys. Transponder chips are powered by an infrared signal, not battery power.
To activate the transponder chip, the ignition cylinder must be turned on. The ring emits a burst IR energy which is detected by a microchip within the key. The chip responds by transmitting a unique code to the immobiliser in your car. The car's computer compares the code stored in its memory with the transponder's code and If the two codes are identical it will begin the engine.
The immobiliser will shut down the engine if it detects an unauthorised key or transponder. It also blocks any vital components of the vehicle from functioning. The car will not move when the engine isn't functioning. It's easy for a criminal hot-wire it and drive off. This is a powerful deterrent against crime and it is one of the main 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 on 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 in your key. This device is designed to prevent anyone from starting their car without the proper keys. If the system is not able to recognize a digital serial number from the chip on your key, it will shut off the engine immobiliser, which will stop the car from starting.
This car immobiliser system is effective in stopping thieves, however it can be out of connection with the key or transponder chip. This can be caused by interference or the system becoming too sensitive. If this is the case, it might need to be reset. To do this, just disconnect the battery. Leave it disconnected for about 15 minutes before reinstalling it and start the vehicle. This will reset the system and allow it to accept your key once more.
The security light is an immobiliser's method of alerting you to a problem. If you try to start the car but the light is solid on it means that the chip inside your key doesn't match the code stored in the ECU. This could happen if your car key has been replaced with a new one that is not programmed to work with the vehicle, or if an ECU was swapped in a wrong manner.
If this is the case you should take your key or transponder chip to a professional to get them properly programmed for your car. There is also the possibility that the system isn't accepting the key because of an update or software issue. To test this put your key in the ignition and switch it to the ON position but don't attempt to start the engine. Let the key stay in this position for ten minutes. This will cause the security light to light up and then to turn off. If it does not then you must repeat the process and wait for another 10 minutes. This should resolve the issue when you repeat the process three times.
Programming
The car immobiliser prevents the engine from running if a key or fob is not properly programmed. It is based on a specific RFID microchip that isn't able to be copied and has its own serial number. The immobiliser will stop working when it is unable to recognize the code. That's why it's so difficult to beat.
Modern cars come with this system as standard. This makes it difficult to hot-wire a vehicle or utilize a different key for starter. The system works by checking the chip in the key fob or key, and sending a passcode to the ECU (electronic control unit). The ECU is aware that it's the right key and that there hasn't be compromised code. The system will not allow the car to start if it does not receive the correct code. Certain models will even notify the owner if they try to use an incorrect 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 crossing the wrong wiring in a vehicle to fool the ECU. This is a risky technique and requires extensive knowledge to avoid electrocuting oneself. Additionally, many modern car thieves have moved to more sophisticated methods like using specialized apps or Bluetooth to steal the car's data and then remotely control it from their mobile.
Owners of cars will often notice warning lights that signal an immobiliser malfunctioning. This could be due to a variety of reasons however the most common reason is a defective battery in the keyfob. The issue can be solved by replacing the battery.
If this isn't working the transponder chip could be defective or not compatible with the ECU. This is more difficult to fix and diagnose as it could require a specialist locksmith or dealership. A car's immobiliser can be damaged if water manages to enter the system or is physically removed from its fob or key. If any of these problems occur, it's a good idea to visit the nearest garage or dealer for assistance.