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Car Key Repair – How to Fix a Dead Remote Car remotes offer wonderful convenience for drivers. They can unlock doors, access trunks, and even start the engine. But, these remotes sometimes cease to function at uninviable times. Before you head to the dealer, you can try a few quick fixes if your key fob stops functioning. These tips could save you money. Keyless Entry System You don't have to look for keys in your purse or pockets. Just walk to your car, press the button on the keyfob and the doors will unlock and the engine will begin. It's a practical feature that has made the world of car driving more enjoyable and safer. The keyless entry system, as any other device, may be damaged through repeated use or by other factors. If you have problems with yours, you may either visit the dealer or call a locksmith. A keyless entry system operates by sending radio signals, and then looking for the response signal from a key fob. If the system is able to recognize the signal, the car's doors are opened and the onboard computer activated. Certain systems have another transmitter located in the trunk of the car that opens it when you waggle one foot underneath it. Each key fob is equipped with an individual digital identification code, which is given by the manufacturer. The fob is programmed with a unique process called “programming”. This involves turning the ignition of the vehicle repeatedly in a certain sequence, and may also require pushing or pulling levers or buttons or even removing the fuse. Once a key fob has been programmed into the keyless system of your car, it transmits a digital identity code and a function code that instruct the car to (lock or unlock the trunk). The receiver in the car confirms that the transmitter is the person it claims to be by using an authentication and encryption procedure. The onboard computer will allow the vehicle to be opened and start the engine if it is authorized. There are fears that a clever criminal could intercept the code that's transmitted between the key fob and the car. This would require a specific device to record the transmission and then retransmit it later when the system isn't expecting it. Most keyless entry systems utilize a rolling code method to prevent this. This ensures that each new transmission signal received by a car has a counter value that differs from the previous one. Batteries A dead battery is the most frequent reason for the car remote to not work. If you have an extra key fob, it's a cheap and easy fix. Fortunately, most fobs utilize traditional watch-style batteries which are available in hardware stores or big-box retailers for less than $10. You can find directions to disassemble your key fob on the internet or in your vehicle's manual. After you've removed your battery, be careful not to disturb any of the circuits or antennas in the case. If you make a mess of them the key fob could become unprogrammable and may not work. If you have to move the key fobs, be cautious. Certain key fobs could have fasteners which can easily open and scatter key fob pieces across your living space. The case of a majority of key fobs has one screwdriver hole. To open it, you'll need to use a pry tool. To begin you must push the tool around the outer edge of the case, just as you would do when peeling an orange or apple. Don't apply too much pressure, since the case of the fob is usually made of plastic and may break or crack if apply too much pressure to it. When you're ready to replace the battery, make sure to match its size and type to your key fob. Some key fobs have two batteries while others need one. The wrong battery can render your remote keyfob useless. If the issue continues then you can try it again using your fob's key after installing the new battery. If it doesn't work then you'll have to determine if the fob is suffering from an issue that is more complicated and requires a professional diagnosis. You may have to have your key fob reset at the dealer or purchase a new one. Buttons The buttons on your key fob could be tiny, but they are packed with electronics. Therefore, it's not surprising that they're destined to fail from time time. The good news is that if your car key button isn't working, there's usually something you can do to fix it yourself. One of the most common reasons a car key remote fails to function is that dirt or crud has become lodged between the buttons. To remedy this, take out the batteries carefully and scrub each button with the help of a cotton swab which has been submerged in the rubbing alcohol. Be sure to dry them completely before reinstalling batteries. It's possible that your key fob has been damaged in some way, such as being dropped on concrete or accidentally scratched. If this is the case, you can test the functionality of your key fob by using a different one. Another possibility is that the door lock sensor in your vehicle has stopped working. repair car key remote 's a tiny metal part that is attached to the key fob's door lock button. It is not common for it to fail due to weather conditions or prolonged use. Press your key button several times without locking or unlocking your doors. This will reset the sensor. If all else fails, you can test the functionality of the spare key by attempting to lock and unlock your doors using it. If the spare key does not work, it could be necessary to find a 24-hour locksmith that offers automobile key repair in order to get your remote working again. If your car's key fob is working but still not locking or unlocking the vehicle, you may try to re-programme your computer system. If you've had the same key fob for a while, it may need to be reset every few months to continue working with your vehicle. It's not the ideal situation however it's much better than having to replace the remote completely.