How to Fix a Key Fob That isn't Working
If your key fob won't work, you can fix it with just a few steps. The first step is to make sure it's not the backup remote.
If your backup remote can unlock and lock the doors of your car, then it is likely that the primary remote isn't working. The most common causes for key problems with your car remote are issues with the circuitry or battery.
Battery
The battery in the key fob could be worn out over time. It is easy to replace the battery. However it is essential to select the right kind. You can consult your owner's guide or contact the manufacturer to find out the right kind. It is recommended to inspect the battery compartment thoroughly, as dead batteries sometimes leak caustic chemicals that can harm the remote. If changing the battery doesn't solve the issue, there may be other issues requiring professional attention. For instance, if the buttons seem stuck or damaged It may be necessary to take the remote apart and rebuild 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 uncommon for buttons to cease working, or to require a hefty push to make them work. This can be extremely frustrating particularly if you're away from home and need to start your vehicle. Fortunately, even worn-out or damaged buttons can be fixed with a bit of time and a few materials you may already have around the home.
First, verify that the batteries are properly inserted and that the indentation at the back of the button is filled. Then, carefully open the remote and examine the circuit board. Check for signs of rust or other signs the buttons have been worn or damaged. For example there could be conductive paint missing. Then, using the Q-tip, dipped in alcohol, gently clean any membrane contacts that have become worn or where conductive paint is missing. Don't rub too hard as this can damage the conductive paint, and block the button from firing when it is pressed.
Check the battery connector terminals for loose solder connections. Soldering key lock repair near me into place will allow the button to function again in the event that this is the case. The same process can be used to restore function to any other loose connections in the fob.
If any of the rubber buttons on the front of the keyfob aren't functioning or require to be pressed extremely hard the graphite disks at the back of the button might have worn out and require replacement. This is usually done by rubbing a pencil across the disks. This should bring the button back to life.
If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it could be that the circuitry has failed. It is possible to fix this issue by cleaning and re-soldering your fob however, you should have another spare in case it does not work.
Circuitry
If the key fob buttons are working the circuit board that is inside your remote might be dirty. This problem can be resolved by a thorough inspection. Broken cases and water are the most frequent causes of boards that are dirty. A broken case allows water and other debris to pass through and short out the electronics. Water can also destroy pins and connectors that are small on the board, which are known as via's.
If you're handy enough to remove your key fob, and you're not afraid of a little mess, we can de-solder the buttons and then solder new ones in their place. It's also worth checking the connections between the battery terminals. They can become extremely dirty and if they're loose, the buttons may not work or may even remain in their down position. Soldering the terminals back to their proper positions is usually enough to bring a non-working fob back to working.
Non-Remote transponder chips
Sealed non-remote transponder chip are more durable than remote fobs that contain them but they can still be cracked by a hole that is drilled into them or over by a lawnmower or car door handle. The failure of the fuse is usually the cause of non-remote chip failures.
If you're handy enough to open a sealed non-remote key fob and are able to bear the mess, you can take off the circuit board and examine the fuse using an instrument to verify diode function. If you're unsure about doing this, go to your local hardware store or Oreilly's, and they will usually have an RF frequency tester that will tell you if the key fob is transmitting a signal.
Programming
Key fobs endure many abuses and aren't impervious to damage. They may lose their connection to the car's receiver because of shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith, or a dealer in the main, can reprogram your key fob and get it back working again. In the rarer case that resetting and repairing your key fob isn't working it may be time to replace it entirely.
