How to Fix a Key Fob That isn't Working
If your key fob isn't working There are a few simple steps that can be taken to fix it. First, ensure that it's not your backup remote.
If your backup remote can unlock and lock the doors of your car, it is likely that the main remote is not working. The most common causes of key malfunctions for car remotes are battery or circuitry issues.
Battery
The battery inside the key fob may get worn out over the course of time. It is easy to replace a battery. However it is essential that you use the correct type. You can consult the owner's manual or contact the manufacturer to inquire about the correct type. It's recommended to examine the battery compartment thoroughly because dead batteries can release caustic chemicals that could harm the remote. If replacing the battery does not solve the issue, there may be other issues requiring professional attention. For instance, if the buttons appear stuck or damaged it could be necessary to disassemble the remote and rebuild its components. You could also try reprogramming your car to recognize the new key fob.
Buttons
Key fobs can become filthy and worn out due to frequent use. It is not unusual to have buttons stop functioning, or require a hefty press to get them working. This can be a huge hassle especially if you're away from home and you need to start your vehicle. Even worn-out or malfunctioning buttons can be fixed with a bit of time and the tools you already have at home.
First, make sure that the batteries have been correctly inserted and that the indentation on the back of the button is filled. Then, open remote car key repair near me with care and inspect the circuit board. Check for indications of rust or other signs the buttons are damaged or worn out. For example there could be conductive paint missing. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has become damaged or where conductive painting is missing. Do not rub too vigorously in order to damage the conductive paint and stop the button from firing when you press it.
Check the battery connector terminals for loose solder connections. Soldering them back into place can restore the button's functionality if this is the case. You can apply the same procedure to restore functionality to any other loose connection within the fob.
If any of the rubber buttons located at the front of the keyfob aren't working or need to be press very hard the graphite disks at the back of the button could have worn out and will require replacement. You can usually do this by rubbing a pen over the disks. This will bring the button back to life.
If none of these solutions work or you not be able to get the button respond when you press it hard, it could be that the circuitry is failing. This can be fixed with a quick clean and replacing the solder, but it is recommended to have an additional fob on hand in the event that this method does not work for you.
Circuitry
If the key fob buttons are working, the circuit board inside the remote could be dirty. A very thorough inspection is usually enough to fix this problem. The most frequent causes of dirty circuit boards are water and broken cases. A broken case allows water and other debris to pass through and short circuit the electronic components. Water can also damage pins and vias, which are tiny connectors found on the board.
If you're skilled enough to open your key fob and aren't afraid of making a mess, we can remove the buttons from their sockets and solder in new ones. Also, you should check the connections between the battery terminals. They can get very dirty and if they're loose, the buttons might not function or may even remain in their down position. Soldering the terminals and buttons into place is usually enough to return a malfunctioning fob to a working condition.
Non-Remote Transponder Chips
The non-remote chips sealed in a sealed case are more durable than remote fobs, but they can be cracked when a hole is made in them, or when a door handle for a car or lawnmowers plows over them. The majority of non-remote transponder chip malfunctions can be attributed to an exploded fuse.
If you're not comfortable opening the key fob, you can remove the circuitboard and use a multimeter to determine if the diode is operating properly. If you're unsure about doing this, go to your local hardware store or the Oreilly's and they usually have an RFID frequency tester that can let you know 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 car's receiver because of shock or a low battery, which requires the reprogramming. A professional auto locksmith or a main dealer can reprogram your key fob and get it functioning again. In the rarer case that resetting or repairing your key fob doesn't work it could be the time to replace it all over again.