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Get Source If you're a vehicle repair shop, skoda key programming capabilities can be useful. You might be asked to provide an alternate key fob for the customer who has lost their original key, or you may be asked to duplicate the transponder's code on an old module. A specialist might only need only a few minutes to program new keys. But it can be dangerous for a novice who attempts to do it without the right tools and equipment. On-Board Programming Modern key fobs go beyond an ordinary remote control that enables you to start your car, and also open the rear hatch. They contain transponders that communicate with the vehicle via an antenna, and also transfer information like an ID code or even the VIN of the vehicle. The vehicle will then be able to unlock doors and start the engine with the key present. These transponders should also be programmed with immobilizer codes. Some vehicles can be programmed through a simple sequence of steps, whereas other require special software and key programming tools. If you're working with a vehicle that has onboard programming, the owner's manual or Internet search for “onboard programming steps for X vehicle” will provide you with the information you need. In certain situations, the key may need to be copied, which means the new key must have the same immobilizer code as the original. This is accomplished by using a specialized key programming tool that collects the code from the module and burns it into the new key. Certain vehicles require the transponder to be completely reprogrammed this is possible in certain instances with an J2534 interface but usually requires the removal of the module as well as the EEPROM chip in order to reprogramme. If the vehicle has an encrypted transmission, you'll need a special software and key programming tools that are designed for dealers to program additional keys. These tools are expensive and should only be used by qualified locksmiths. If you're shopping for a dealer-grade key programer ensure that you investigate the seller and read online reviews. A bad seller might send you an item that doesn't work with your vehicle or has only a portion of the features. A good seller should be able provide you with documentation and support that proves the product is functional. In certain instances a poor key programmer could cause damage to your vehicle. It is, however, extremely rare. A reputable seller will offer a warranty to give you peace-of-mind. Programming EEPROM The EEPROM type is a non-volatile memory which stores data even when the power is shut off. It is used to store settings for configuration as well as sensor calibration data, firmware updates and other important data in a variety of electronic devices. It is also able to be reprogrammed several times, making it an ideal option for applications that require frequent updates. This type of memory offers faster read-write speeds and is usually less expensive than ROM. If you are a locksmith who has to reprogram a chip inside an automobile, you will need a special device called an automotive programmer. This device is capable of reading the EEPROM and cloning it into another chip. This lets you test multiple ECUs without causing damage to your original. This is a great tool for those who work on cars. The EEPROM is a major controller for the vehicle's immobilizer. Its unique ID number is transmitted to the transponder chip embedded in your key when it gets within distance of the car's antenna ring. The car then asks the chip to respond and should it receive an OK signal it will begin the engine. If the chip does not respond, the vehicle will enter the security mode, which prevents it from starting. The EEPROM can be found in the Kessy Module, located just above the accelerator pedal. It's a small, black box with two connectors. To get to it, you'll have to remove the accelerator pedal. To do this, you'll have to pull off the single plastic clip that holds it in place and pull it down. Next, you'll need to unplug the two electrical connectors on the Kessy module. Once you have removed the Kessy Module and put it on your work surface. Make use of a small screwdriver with a flat blade to pull the clips that hold the case and take it off. You'll need to connect the board to a testboard but this can be done using a hot-air workstation. Then, you'll need access the EEPROM using an external program and save a binary download to your computer. This will provide you with key information, like the VIN. Key Fob Programming The process of programming a key fob involves the vehicle's onboard system using an electronic signal transmitted by the key fob. This allows the key fob to connect with the vehicle and perform its intended function such as locking or unlocking doors, or starting the vehicle. This is necessary in the event that you are using a new keyfob or replacing one that doesn't perform as expected. Read the owner's manual of your car for instructions before you attempt to program it yourself. You can also search online for key fob programming instructions for your particular vehicle. These instructions are available on manufacturer websites as well as automotive forums and instructional videos. These instructions must be followed precisely, as any errors could result in an unsuccessful programming attempt or damage to the onboard systems of your vehicle. To program a keyfob put the key into the ignition and turn it “on”. Press and hold the button on the keyfob for a short period of time. Depending on the model of your vehicle, this may be the unlock or lock button. Then, you'll have to wait for a response from your vehicle that could be as straightforward as a locking sound or flashing light. Switch off the ignition after a short period of time to exit the programming mode. Once you've successfully programmed your key fob, make sure to test it to ensure that all the features are working properly. Press the lock and unlock button on the keyfob while standing a distance away from your vehicle to see if the doors respond to your expectations. Also check any other features, such as trunk release or remote start. It is possible to program a car keyfob by yourself however the process could be risky and difficult in the wrong way if it's not done properly. It's best to delegate any type of auto maintenance or repair to an expert unless you're an experienced auto locksmith. A professional auto locksmith will use the appropriate methods and tools to produce a successful result, reducing your risk and costs. Transponder Programming Transponder keys (also known as Chip Keys) are designed to protect against theft of cars by transmitting a unique signal to the immobilizer system that then disables the engine. These chips contain a digital serial number that ensures only the correct key is used to start your vehicle. This technology was developed in the 80's to combat the increasing problem of car thefts that were facilitated by hot-wiring methods. While this method has proved efficient in preventing theft of cars but it also causes issues for those who have lost their keys. In this instance you'll need to have a transponder chip reprogrammed to get your car back on the road. This isn't as easy as taking the old chip off and putting in a new one, though. Instead, you'll have to make use of a specific key programming tool compatible with the system in your car and follow the steps carefully. The first step of the process is to purchase an unopened transponder chip at a dealership or auto parts store. Once you've got it the next step is to connect an instrument for diagnostics to your vehicle's computer system and enter the programming mode. The procedure varies based on the make and model of your vehicle. Refer to the owner's manual for detailed instructions. You can begin the process of coding chips after you have connected the tool to the computer and entered the programming mode. This requires you to insert the key in the ignition and turn it on. You'll then need to wait until the horn sounds before turning the ignition off. You'll then need to wait for six seconds before pressing the unlock button on the fob of your key, which will trigger the coding process. It is possible to program your own transponder chip however, we recommend the assistance of an expert locksmith. This will ensure that the new chip has been correctly programmed and is able to be used to start your vehicle. A professional will also have the tools necessary to complete the task quickly and efficiently.