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How to Fix a Key Fob That isn't Working
If your key fob isn't working A few easy steps can be taken to fix it. First, check to make sure it's not the backup remote.
If the backup can lock and unlock your car door, then there's a likely issue with the main remote. The majority of car remote key malfunctions result from circuitry or battery issues.
Battery
It is not unusual for the battery inside the car key fob to get worn out. It is easy to replace a battery. However, it is important that you choose the right type. You can check the owner's manual or contact the manufacturer to determine the right kind. It is also crucial to examine the battery compartment, since dead batteries can leak caustic chemicals which can damage the remote. If replacing the battery does not fix the issue there could be other issues requiring professional attention. For instance, if buttons seem stuck or broken, it may be necessary to disassemble the remote and rework its components. It is also possible to reprogramme the vehicle to recognize the new fob.
Buttons
Key fobs may become dirty and worn-out from frequent use. It is not common for buttons to cease functioning, or require a long push to make them work. This can be a hassle especially when you're away from your home and you need to turn on your car. Even broken or damaged buttons are often fixable with a little time and materials you already have at home.
First, make sure that the batteries have been correctly installed and that the indentation at the back of the button has been filled. Take repair broken car key and look over the circuit board. Examine for signs of rust or other indications that the buttons are worn out or damaged, such as missing conductive paint. Then, using a Q-tip dipped in rubbing alcohol, gently clean any membrane contacts that have become worn or have conductive paint missing. Avoid rubbing too hard because this could damage the conductive paint and stop the button from firing when pressed.
Also, carefully check the battery connector's terminals for an unattached solder connection. Soldering them back in place can restore the button's functionality in the event that this is the case. The same procedure can be used to restore functionality to any other loose connections in the fob.
If any of the rubber buttons on the front of the keyfob are not working or need to be pressed very hard the graphite disks on the back of the button might have worn out and will require replacement. This can usually be done by rubbing a pencil on the disks, which should bring the button back to life.
If none of these solutions work or you cannot get the button to respond when you press it hard, it could be that the circuitry is failing. It is possible to fix this with a quick clean and replacing the solder, but it is recommended to have an additional fob available in the event this method fails for you.
Circuitry
The circuit board inside the remote control could be dirty regardless of whether the buttons on the key fob are working or not. A thorough inspection will usually resolve this problem. The most common causes of dirty circuit boards are water and damaged cases. repair broken car key damaged case can allow water and other debris to enter the circuit board, which can cause it to short out. Water can also destroy pins and connectors on the board, which are known as via's.
If you're able to remove your key fob, and you're not afraid of a little mess, we can remove the solder from the buttons and solder new ones in their place. It's also worth checking the battery terminal connections. They can become extremely dirty and if they're loose the buttons may not work or even stay in their down position. Soldering the terminals and buttons to their original positions is often enough to bring a non-working fob to working.
Non-Remote transponder chips
The non-remote chips sealed in a sealed case are more durable than their remote fobs, however they can be cracked in the event of a hole being drilled in them, or when a door handle for a car or lawnmowers is pushed over them. Most of the time non-remote transponder chip failures can be attributed to a blown fuse.
If you're not comfortable opening the key fob, remove the circuitboard and use a multimeter to determine if the diode is functioning properly. If you're not comfortable doing this, go to your local hardware store or the Oreilly's and they'll usually have an radio frequency tester that can let you know whether the key fob sending a signal.
Programming
Key fobs are subject to lots of abuse and aren't impervious to damage. They may lose their connection to the receiver in your car due to shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or main dealer can reprogram your key fob and get it back working again. If resetting or fixing your keyfob does not work it may be necessary to replace it.