How to Fix a Key Fob That isn't Working
If your key fob doesn't work then you can fix it by following just a few steps. First, check to make sure it's not the backup remote.
If your backup remote can lock and unlock the doors of your car, then it is likely that the main remote isn't functioning. The most common causes for car remote key failure are issues with the circuitry or battery.
Battery
The battery inside a key fob can be worn out over time. It is simple to replace batteries. However it is crucial to select the right type. You can check your owner's manual or call the manufacturer to determine the right kind. It is also important to check the battery compartment, since batteries that are not working properly can release caustic chemicals which can damage the remote. If changing the batteries doesn't solve the problem it could be because there are other issues that require attention by a professional. For instance, if the buttons appear stuck or broken it could be necessary to take the remote apart and rework its components. You could also try reprogramming the vehicle to recognize the new fob.
Buttons
Through repeated use, key fobs can get dirty and worn. It is not uncommon to have buttons stop working, or to require a long press to get them working. This can be very frustrating, especially if you are away from home and you need to start your car. Even malfunctioning or worn-out buttons can be fixed with a little time and materials you already have at home.
First, make sure that the batteries are correctly placed and that the indentation at the back of the button has been filled. Open the remote carefully and examine the circuit board. Check for evidence of rust, or other indications that the buttons have been damaged or worn out. For example there could be conductive paint missing. Then, using the Q-tip, dipped in alcohol, gently clean any membrane contacts that have worn or have conductive paint missing. Don't rub too hard, as this could erode the conductive paint, and block the button from firing when it is pressed.
Also, be sure to check the battery connector terminals for any loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the case. remote key repair near me can be used to restore functionality to any other loose connections in the fob.
If any of the rubber buttons on the front of the keyfob isn't functioning or require to be pressing extremely hard the graphite disks at the back of the button may have worn out and will need to replaced. This can be done by rubbing a pencil on the disks. This should bring the button back to its original state.
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. This can be fixed by a quick clean, and re-soldering, but it is recommended to have an additional fob on hand in the event that this method does not work for you.
Circuitry
Whether or not the keys fob buttons are functioning the circuit board in your remote may be dirty. A very thorough inspection will usually resolve this problem. Water and broken cases are the most frequent causes of dirty boards. A broken case can let water and other debris into the circuit board, causing it to short. Water can also eat away at pins and small connectors on the board, which are known as via's.
If you're able to open up your key fob, and you're not afraid of making a mess, we can de-solder the buttons and then solder new ones in their place. It's also worth looking at the battery terminal connections. They can get very filthy and if they're not tight enough, the buttons might not function or even stick in their down position. Soldering the terminals, and putting the button back in their place is generally all that's required to return keys that are not in functioning condition.
Non-Remote transponder chips
Sealed non-remote transponder chips are more durable than remote fobs that contain them but they can still be damaged by a hole that is that is drilled into them or over by a lawnmowers or car door handle. The failure of the fuse is usually to blame for non-remote chip failures.
If you're able to open a sealed non-remote key fob and can tolerate the mess, you can take off 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, head to your local hardware store or Oreilly's and they'll usually have an RF frequency tester that will let you know whether the key fob sending a signal.
Programming
Key fobs endure many abuses and aren't completely indestructible. They may lose their connection to the car's receiver due to shock or a low battery, which requires them to be reprogrammed. A professional auto locksmith or main dealer, can reprogram your keyfob and get it up and running again. If resetting or repairing the keyfob is not working it may be necessary to replace it.