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How to Fix a Key Fob That isn't Working
If your key fob isn't functioning A few easy steps can be taken to fix it. First, make sure that it's not the backup remote.
If the backup remote is able to lock and unlock your car door, then there's a likely issue with the main remote. Most problems with car remote keys result from circuitry or battery issues.
Battery
The battery in a key fob can wear out over time. It is simple to replace the battery. However it is essential that you use the correct kind. You can refer to your owner's guide or contact the manufacturer to find out the right kind. It is also essential to examine the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If changing the battery doesn't fix the problem there could be other issues requiring professional attention. For example, if buttons seem to be stuck or broken it could be necessary to disassemble the remote and rebuild its components. You could also try reprogramming the vehicle to recognize the new remote.
Buttons
Key fobs may become dirty and worn out from repeated use. This is not atypical, but it can cause buttons to stop working or require a hard press for them to work. This can be a hassle, especially when you are away from your home and you need to turn on your car. Even worn-out or malfunctioning buttons are often fixable with a bit of time and tools you already have at home.
First, ensure that the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and examine the circuit board. Examine for signs of rust or other indications that the buttons are worn or damaged, such as missing paint that is conductive. Use a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that have worn or where conductive paint is missing. Do not rub too vigorously, as this could erode the conductive paint, and block the button from firing when pressed.
Check the battery connector terminals carefully for any loose solder connections. If this is the case, reconnecting them may restore functionality to the button. The same method can be used to restore function to any other loose connections inside the fob.
If any of the rubber buttons at the front of the keyfob are not working or require being pressed very hard the graphite disks on the back of the button might have worn out and need to replaced. This can be done by rubbing a pencil across the disks, which will bring the button back to life.
If none of these solutions work or you are unable to get the button to respond when pressed hard, it could be that the circuitry has failed. It is possible to fix the issue by cleaning and re-soldering the button but you should also have an extra in case it does not work.
Circuitry
The circuit board of the remote control could be dirty regardless of whether the buttons on the key fob function or not. The issue can be solved through a thorough examination. Broken and damaged cases are the most frequent causes of dirty boards. A broken case can allow water and other debris into the circuit board, which can cause it to short. Water can also get through pins and vias, which are the tiny connectors that are found on the board.
If you're skilled enough to open your key fob and aren't afraid of making an mess, you can take the buttons out of their sockets and solder in new ones. Also, you should check the connections between battery terminals. They can get very filthy and if they're not tight enough, the buttons might not work or even stay in their down position. Soldering the terminals back into place is usually enough to restore a non-working fob to a working condition.
Non-Remote transponder chips
Sealed non-remote transponder chip are more durable than the remote fobs that contain them but they can be cracked by a hole that is drilled into them or over by a lawnmowers or car door handle. car key fob repair near me are usually to blame for non-remote chip failures.
If you are not comfortable opening the key fob, take the circuit board off and use a multimeter to check that the diode is functioning properly. If you're not comfortable doing this, visit your local hardware store or Oreilly's and they will usually have an radio frequency tester that can tell you whether the key fob sending signals.
Programming
Key fobs take many abuses and aren't impervious to damage. They can lose their pairing to the receiver in your car due to shock or a low battery, which requires them to be reprogrammed. A professional auto locksmith or a main dealer will be able to reprogram your key fob to get it working again. If resetting or fixing the keyfob is not working it is possible to replace it.