How to Fix a Key Fob That isn't Working
If your key fob won't work then you can fix it by following just a few steps. First, make sure that it's not the backup remote.
If your backup remote cannot lock and unlock the doors of your vehicle, it is likely that the main remote isn't working. Most problems with car remote keys result from circuitry or battery problems.
Battery
The battery in the key fob could wear out over time. It is simple to replace a battery. However it is crucial to select the right kind. You can refer to your owner's guide or contact the manufacturer to find out the right kind. It is also a good idea to inspect the battery compartment thoroughly since dead batteries may release caustic chemicals that could harm the remote. If replacing the batteries doesn't solve the problem it could be because there are other issues that require attention by a professional. If the buttons are damaged or stuck, for example, it may be necessary remove the remote and rebuild each component. You can also try reprogramming the vehicle to recognize the new remote.
Buttons
Through frequent use, key fobs could wear out and become dirty. This is not unusual however, it can cause buttons to cease working or require a long press to function. This can be a huge hassle particularly if you're away from home and you need to start your car. Even malfunctioning or worn-out buttons are often fixable with a bit of time and tools you already have at home.
First, make sure the batteries are up correctly and that the indentation on the back of the button is filled. Open the remote carefully and examine the circuit board. Check for signs of corrosion or other signs that the buttons are worn out or damaged, such as missing paint that is conductive. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that is worn out or where conductive paint is missing. Do not rub too vigorously, as this could erode the conductive paint and prevent the button from firing when pressed.
Also, carefully check the battery connector's terminals to ensure any loose solder connections. Soldering them back into place will allow the button to function again in the event that this is the case. The same method can be used to restore function to any loose connections inside the fob.
If any of the rubber buttons on the front of the keyfob aren't working or require being pressed 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, which should bring the button back to its original state.
If none of this is useful, or if the button doesn't respond to a hard push, then it may be because the circuit board has gone bad. It is possible to fix this with a quick clean and replacing the solder, but it is ideal to have a spare fob in case this method does not work for you.
Circuitry
If the key fob buttons are working, the circuit board inside your remote might be dirty. This problem can be resolved by a thorough inspection. The most common causes for dirty circuit boards are water and broken cases. A damaged case could let water and other debris to enter the circuit board, causing it to short out. lock and key repair near me can also damage pins and vias, which are the tiny connectors found on the board.
If you're handy enough to open up your key fob, and you're not afraid of some mess, we can remove the solder from the buttons and then solder new ones in their place. It's also worth looking at the battery terminal connections. They can become extremely dirty and if they're loose the buttons might not work or even stay in their down position. Soldering the terminals and buttons into place is usually enough to return a malfunctioning fob to a working condition.
Non-Remote Transponder Chips
Sealed non-remote transponder chips are much more durable than remote fobs they are contained in, however they are still susceptible to being cracked by a hole that is drilled into them or over by a lawnmowers or door handle for a car. The failure of the fuse is usually the cause of non-remote chip failures.
If you're not comfortable opening the key fob, you can remove the circuitboard and use a multimeter to determine if the diode is working properly. If you're not sure with this, go to your local Oreilly or hardware store and test their RF frequency tester. This will tell you whether the key fob sends an RF signal.
Programming
Key fobs are not indestructible and are susceptible to damage through a variety of causes. They may lose their connection with the receiver inside your vehicle due to shocks or low battery, which calls for the reprogramming. A professional auto locksmith or a dealer in the main, can reprogram your keyfob to get it up and running again. If resetting or repairing your key fob fails, you may need to replace it.
