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, check to make sure it's not your backup remote.
If your backup remote is unable to lock and unlock the doors of your car, then it is most likely that the primary remote is not working. Most problems with car remote keys result from circuitry or battery problems.
car key fob repair near me inside the key fob may get worn out over the course of time. It is fairly easy to change out batteries, but it is essential to ensure that you use the right type that you can refer to your owner's manual, or contact the dealer for the manufacturer to determine the type of battery you need. It is also important to check the battery compartment as batteries that are not working properly can release caustic chemicals which can damage the remote. If changing the batteries does not solve the problem it could be because there are other issues that require professional attention. If the buttons are damaged or stuck, for example it could be necessary to disassemble the remote and rework each component. You could also try reprogramming the vehicle to recognize the new device.
Buttons
Due to repeated use, key fobs may wear out and become dirty. It is not common to have buttons stop working, or to require a hard push to make them work. This can be very frustrating particularly when you're away from home and have to start your car. Even malfunctioning or worn-out buttons can be fixed with a little time and tools you already have at home.
First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully remove the remote and examine the circuit board. Check for signs of corrosion or other indications that buttons are worn out or damaged, such as missing paint that is conductive. Then, using the Q-tip, dipped in alcohol to gently clean any membrane contacts that have become 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 you press it.
Examine the battery connector's terminals for loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the situation. You can follow the same method to restore functionality to any other loose connection inside the fob.
If any of the rubber buttons on the front of the keyfob aren't working or need to be pressing very hard the graphite disks at the back of the button may have worn out and will require replacement. You can usually do this 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 hard press, then it may be the case that the circuit board has gone bad. It is possible to fix the issue by cleaning and re-soldering the button but you should also have a spare in case it does not work.
Circuitry
Whether or not the key fob buttons function the circuit board that is inside your remote might be dirty. This issue can be fixed by a thorough inspection. Broken cases and water are the most common causes of dirty boards. A damaged case can allow water and other debris to get in and short circuit the electronic components. Water can also get through pins and vias, which are the tiny connectors on the board.
If you're able to open your key fob and aren't afraid of making an mess, you can remove the buttons from their sockets and put in new ones. Also, you should check the connections between the battery terminals. If they're loose, the buttons may not function or get stuck in their down position. Soldering terminals and buttons back into place is usually enough to bring a non-working fob to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, however they are still susceptible to being broken by a hole being made in them or pushed over by a lawnmowers blade or door handle for a car. Most of the time, non-remote transponder chips fail, and this could be attributed to blowing fuses.
If you're handy enough to open up a sealed non-remote key fob and can tolerate the mess, you can remove the circuit board and check the fuse using a multimeter to ensure that it is functioning as intended. function. If you're not comfortable doing this, go to your local hardware store or the Oreilly's and they'll usually have an RFID frequency tester that can let you know if the key fob is sending signals.
Programming
Key fobs take many abuses and aren't completely indestructible. They can lose their pairing with the receiver in your vehicle due to shocks or a low-battery, which requires reprogramming. A professional auto locksmith or a main dealer will be able to reprogram your key fob and get it functioning again. If resetting or fixing your keyfob does not work it is possible to replace it.