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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 with a few simple steps. The first step is to make sure that it's not your backup remote.
If car key repair near me can lock and unlock the doors of your car, then it is likely that the main remote isn't working. The most frequent causes of key problems with your car remote are issues with the circuitry or battery.
Battery
It is not unusual for the battery in a car key fob to get worn out. It is fairly easy to replace a battery, although it is important to ensure you choose the correct type and you can consult the owner's manual or talk to the manufacturer's dealer to find out what kind of battery you require. It is recommended to examine the battery compartment with care since dead batteries may leak harmful chemicals that can cause damage to the remote. If changing the batteries doesn't solve the issue, it may be that there are other issues that require attention by a professional. If buttons are damaged or stuck, for example it might be necessary to disassemble the remote and rework each component. You could also try reprogramming the vehicle to recognize the new key fob.
Buttons
Due to repeated use, key fobs may wear out and become dirty. This is not uncommon however it can cause buttons to stop working or require a hard press for them to work. This can be a hassle particularly when you're away from home and have to turn on your car. Even worn-out or malfunctioning buttons can be fixed with a little effort and materials you already have at home.
First, verify that the batteries are correctly installed and that the indentation at the back of the button is filled. Then, open the remote with care and examine the circuit board. Look for indications of rust or other indications that the buttons are 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 is damaged or has conductive paint missing. Do not rub too vigorously in order to damage the conductive paint and prevent the button from firing when it is pressed.
Check the battery connector's terminals carefully for any loose solder connections. Soldering them back into place can restore the button's functionality If this is the case. The same method can be used to restore function to any loose connections in the fob.
If, for instance, any of the rubber buttons on the front of the key fob aren't functioning or require a hard press to work it is likely the graphite disks that are on the back of the button are deteriorating and require replacement. You can usually do this by rubbing a pen over the disks. This will bring the button back to life.
If none of these solutions work, or if you still not be able to get the button respond when pressed hard, it is possible that the circuitry is failing. It is possible to fix this issue by cleaning and re-soldering the fob however, you should have another spare in case it doesn't work.
Circuitry
Whether or not the key fob buttons function the circuit board in your remote might be dirty. This issue can be fixed through a thorough examination. Broken cases and water are the most common causes of dirty boards. A broken case can let water and other debris to get into the circuit board, causing it to short. Water can also eat through pins and vias, which are the tiny connectors on the board.
If you're able to remove your key fob and don't mind making a mess, we can remove the solder from the buttons and put new ones in their place. Also, it's worth checking the connections between battery terminals. They can become very filthy and if they're not tight enough, the buttons may not work or even stick in their down position. Soldering the terminals back into place is usually enough to restore a non-working fob to working.
Non-Remote Transponder Chips
Sealed non-remote transponder chips are more durable than the remote fobs that have them however they are still susceptible to being broken by a hole being made in them or pushed over by a lawnmowers blade or car door handle. Fuse failures are usually to blame for non-remote chip failures.
If you're able to remove the sealed key fob and are able to bear the mess, you can easily remove the circuit board and examine the fuse using a multimeter for proper diode function. If you don't feel comfortable with this, go to your local Oreilly or hardware store and test their RF frequency tester. This will let you know whether the key fob transmits a signal.
Programming
Key fobs are not indestructible and are susceptible to being damaged through a variety of causes. They may lose their connection with the receiver inside your vehicle because of shocks or a low battery, which calls for reprogramming. A professional auto locksmith or dealer can reprogram your key fob and get it working again. In the rarer case that resetting and fixing your key fob isn't working it could be the time to replace it entirely.