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Key Fob Replacement and Reprogramming - Why Your Car Won't Start

Nowadays, all vehicles are equipped with an engine immobilizer to protect against theft of cars. If your vehicle isn't starting after inserting the key fob there could be an issue with a transponder chip that is not sending an encryption code to the immobilizer system.

This is a simple fix that any auto locksmith on the Gold Coast can do. Let's look at the various components of your vehicle's immobiliser to find out what you can do.

Battery

It is important that you concentrate on the profit and cost-saving opportunities that your auto repair car key remote shop. You can achieve this by offering remote key fob repair fob replacements and reprogramming to your customers. This will not only benefit your customers but will also boost your shop's profits without subletting to the dealership.

The key fob battery is used to power the remote car key repair locking and opening systems. The immobiliser isn't powered by the key fob battery. Instead, the immobiliser is dependent on the transponder chip that is located in the fob or key. The chip transmits a passcode to the car's immobilizer unit that 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 then the system will disable elements that are crucial to the start of the vehicle, such as the ignition or starter motor. The car will be impossible to start if you do not have the correct key.

The immobiliser system has proven highly effective in cutting down on car key immobiliser repair theft since it was first introduced. Even so, thieves are constantly seeking ways to bypass these security measures. One of these is the Kia Challenge trend on TikTok, which shows how easy it can be to hot-wire an automobile.

The majority of insurance companies now factor in the use of an immobiliser when they calculate premiums, making it more appealing to purchase cars that already have this feature. Even cars that are factory-fitted with an immobiliser could be prone to problems. Fortunately, these problems are usually easy and cheap to repair. A dying or dead keyfob battery is typically the reason for a malfunctioning ignition immobiliser. This can be identified with an instant diagnostic test. If the issue continues, it could be due to electrical issues or wiring issues. It's best to seek out a professional to diagnose the problem and repair it.

Transponder Chip

In cars manufactured after 1995, a small electronic chip called transponder is embedded in the head of your car key. Also known as a chip key or a 'transmitter & responder key, it is designed to prevent the engine from starting if someone else has a copy of your car key. It functions by sending the radio frequency signal from the key to the immobiliser system in your car. If the code stored in the car key repair's computer matches the signal sent by the key the immobiliser will then be disarmed and the engine will begin to run.

The key with the transponder can also be referred to as a "fob" or a "smart" key, because it is more difficult to duplicate than mechanical keys. Using special techniques, it is feasible to copy a conventional car mobile key repair however, not the transponder key. Transponder chips are powered by an infrared signal and not battery power.

To activate the transponder chip, the ignition cylinder needs to be switched to ON. The ring emits IR energy which is detected by a microchip inside the key. The chip responds by sending a unique code the immobiliser of your car. The car's computer analyzes the code stored in its memory to the transponder's code and when the two codes match it will begin the engine.

If the immobiliser is able to detect an unauthorised transponder or key is being used, it will disable the engine and prevent any of its essential components from functioning. Without a functioning engine, the vehicle won't be able to move and it would be very easy for a criminal to hot-wire the vehicle and then drive away. This is a powerful way to deter crime and it is one of the main reasons why it's important to have your car key immobiliser repaired immediately you discover an issue. If you don't do this and the security light on your vehicle will continue blinking, and you won't be able to start it.

Security Light

The immobiliser makes use of a tiny battery to transmit an electrical signal to the chip in your key. This is an anti theft device that stops anyone from driving your vehicle without the right key. If the system is unable to detect an electronic serial number from the chip on your key, it will shut off the engine immobiliser, which will stop the car starting.

The car immobiliser is a great method of deterring thieves, however it can occasionally be out of the sync. This can be due to interference or a system that is too sensitive. If this is the case, it might need to be reset. To do this, just disconnect the battery. After 15 minutes, reinstall the battery and restart the car. This will reset the system and allow it to accept your key once more.

The security light is the vehicle immobiliser's way of telling you that there's a problem with the system. If the light is illuminated and you attempt to start your vehicle, it indicates that the code stored in the ECU is not compatible with the chip on the key. This can happen if your car key was replaced with a new one that is not compatible with the vehicle, or if an ECU was not swapped correctly.

If this is the case, it's best to take your key or transponder chip to a professional to get them properly programmed for your vehicle. It's possible that your system will not accept the key due to a software upgrade or glitch. To test, put your key into the ignition and then turn it to the ON position. Do not try to start the car. The key should remain in this position for ten minutes. This will cause the security light to turn on and to go off. If it doesn't work, you'll have to repeat the procedure and wait another 10 minutes. This should solve the issue If you repeat the procedure three times.

Programming

A car immobiliser stops a car's engine from running without a properly programmed key or fob. It is based on a specific RFID micro-chip that can't be duplicated and has its own digital serial number. The immobiliser will disengage if it doesn't recognise the code. That's why it's so difficult to beat.

Modern cars come with this security system by default. This makes it really hard to connect the car to a hot wire or use a different key as a starter. The system works by analyzing the chip in a key fob or key, and sending a passcode back to the ECU (electronic control unit). The ECU then knows that it's the right key and that the passcode hasn't been compromised. The system won't permit the vehicle to start if it does not receive the correct code, and some models will even inform the owner in the event that someone attempts to use an incorrect fob or key.

The system isn't completely 100% secure, however. Some thieves have managed to bypass the immobiliser using methods such as 'hot-wiring'. This involves crossing the wrong wires through a vehicle's wiring to fool the ECU to believe that the proper key or fob is being used. But, this technique is extremely dangerous and requires a lot of experience in order to do it without electrocuting yourself. Modern car thieves are employing more sophisticated methods such as Bluetooth or specialised apps to steal a car's information and remotely manage it.

Owners of cars will often notice warning lights that signal an immobiliser gone haywire. It can happen for various reasons, but the most common one is a malfunctioning battery in the keyfob. This issue can be resolved by a simple replacement.

If this doesn't work the transponder chip could be defective or not compatible with the ECU. This is more difficult to diagnose and fix because it requires 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 to seek help.