How to Fix a Key Fob That isn't Working
If your key fob does not work and you're not sure why, you can fix it by following some simple steps. First, ensure that it's not the backup remote.
If your backup remote is unable to unlock and lock the doors of your car, then it is most likely that the primary remote isn't functioning. Most problems with car remote keys result from circuitry or battery issues.
Battery
It is not unusual for the battery inside the car key fob to wear out. It is simple to replace batteries. However it is crucial that you choose the right kind. You can refer to the owner's manual or contact the manufacturer to inquire about the right type. It is also essential to inspect the battery compartment as batteries that are not working properly can release caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the issue, it may be that there are other issues that require professional attention. For example, if buttons appear stuck or broken It may be necessary to take the remote apart and rework its parts. You can also try reprogramming the vehicle to recognize the new fob.
Buttons
Key fobs can become dirty and worn-out from repeated use. This is not uncommon, but it can cause buttons to stop working or require a very difficult press to get them to work. This can be very frustrating particularly when you're away from home and need to start your car. Even broken or damaged Suggested Internet site can be fixed with a little time and the tools you already have at home.
First, check that the batteries are correctly inserted and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. Look for signs of rust or other signs the buttons have been worn or damaged. For instance the paint that conducts electricity could be missing. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has damaged or where conductive paint is missing. Don't rub too hard, as this could erode the conductive paint and prevent the button from firing when pressed.
Also, make sure to inspect the battery connector's terminals to ensure an unattached solder connection. If this is the case, simply connecting them back could restore functionality to the button. You can use the same procedure to restore functionality to any other loose connection in the fob.
If, for instance, any of the rubber buttons on the front of the key fob have stopped working or require a difficult press to function, it is likely that the graphite disks that are on the back of the button are wearing down and need to be replaced. You can usually do this by rubbing a pen across the disks. This will bring the button back to life.
If none of this is helpful or if the button doesn't respond to a firm press, then it may be because the circuit board itself has become damaged. It is possible to fix the issue by cleaning and re-soldering your fob but you should also have a spare in case it does not work.
Circuitry
The circuit board in the remote control could be dirty, regardless of whether the buttons on the key fob are working or not. A thorough examination is often enough to resolve this problem. The most common causes of dirty circuit boards is water and broken cases. A broken case can allow water and other debris to enter the circuit board, which can cause it to short. Water can also damage pins and small connectors on the board, which are known as via's.
If you're able to open your key fob and aren't afraid of making some mess, we can take the buttons out of their sockets and solder in new ones. It's also worth checking the connections between the battery terminals. They can become extremely filthy and if they're not tight enough, the buttons might not work or may even remain in their down position. Soldering the terminals and buttons to their original positions is often enough to return a malfunctioning fob to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are much more durable than the remote fobs they are contained in, but they can be damaged by a hole that is that is drilled into them or over by a lawnmowers blade or door handle for a car. Fuse failures are usually the cause of non-remote chip failures.
If you're able to open a key fob that is sealed and are able to bear the mess, you can take off the circuit board and test the fuse with a multimeter for proper diode function. If you're not comfortable with this, you can visit your local Oreilly or hardware store and utilize their RF frequency tester. This will inform you whether the key fob sends a signal.
Programming
Key fobs endure lots of abuse and aren't completely indestructible. They can break their connection with the receiver in your vehicle due to shocks or low battery, which calls for changing the program. A professional auto locksmith or main dealer can reprogram the key fob and get it back up and running again. If resetting or replacing your keyfob does not work, you may need to replace it.