How to Fix a Key Fob That isn't Working
If your key fob isn't functioning There are a few simple steps that can be taken to fix it. First, ensure that 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 main remote is not working. The most common causes of car remote key failure are circuitry or battery issues.
Battery
It is not uncommon for the battery in a car key fob to get worn out. It is relatively easy to replace the battery, however it is important to make sure that you select the correct one; you can look in the owner's manual or talk to the dealer for the manufacturer to determine the type of battery you need. It is also essential to examine the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the problem, it may be that there are other issues that require professional attention. If the buttons are stuck or broken, for example it might be necessary to take the remote apart and rework each component. You could also try reprogramming the vehicle to recognize the new device.
Buttons
Key fobs may become dirty and worn-out from repeated use. This is not atypical however it can cause buttons to stop working or require a very hard press for them to function. This can be a huge hassle especially if you're out of town and need to start your vehicle. 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 are properly installed and that the indentation at the back of the button is filled. Then, carefully open up the remote and inspect the circuit board. Check for signs of rust or other indications that the buttons have been worn or damaged. For instance the paint that conducts electricity could be missing. Then, using a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that have become worn or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when you press it.
Also, be sure to check the battery connector's terminals for any loose solder connections. Soldering them back in place will allow the button to function again if this is the case. The same process can be used to restore functionality to any other loose connections inside the fob.
If, for instance, any of the buttons made of rubber on the front of the key fob stop functioning or require a difficult press to function it is likely that the graphite disks at the back of the button are wearing out and need to be replaced. It is usually done by rubbing a pen across the disks. This should bring the button to life.
If none of this is useful, or if the button does not respond to a firm press It could be because the circuit board itself has gone bad. It is possible to fix this issue by cleaning and re-soldering the button but you should also have another spare in case it doesn't work.
Circuitry
If the keys fob buttons are functioning the circuit board in your remote might be dirty. The issue can be solved by a thorough inspection. Broken cases and water are the most common causes of boards that are dirty. A damaged case could allow water and other debris into the circuit board, causing it to short out. Water can also damage pins and small connectors on the board, referred to as via's.
If you're able to open your key fob, and aren't afraid of making a mess, we can remove the buttons from their sockets and put in new ones. Also, it's worth checking the connections between the battery terminals. They can get very dirty and if they're loose, the buttons may not work or may even remain in their down position. Soldering car key repair near me and buttons into place is usually enough to restore a non-working fob back to working.
Non-Remote transponder chips
The non-remote chips sealed in a sealed case are more durable than remote fobs, however they can be cracked if a hole is drilled into them or when a door handle for a car or lawnmowers plows over them. The failure of the fuse is usually to blame for non-remote chips failures.
If you're not comfortable opening the key fob, you may remove the circuitboard and use a multimeter to determine if the diode is operating correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will inform you whether the key fob sends signals.
Programming
Key fobs aren't impervious to destruction and are susceptible to being damaged by a lot of things. They can lose their pairing with the receiver inside your vehicle due to shocks or a low battery, which calls for changing the program. A professional auto locksmith or main dealer can reprogram your keyfob and get it working again. If resetting or repairing your keyfob does not work it is possible to replace it.