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How to Fix a Key Fob That isn't Working
If your key fob does not work, you can fix it by following just a few steps. First, make sure that it's not your backup remote.
If your backup remote cannot lock and unlock the doors of your car, then it is likely that the primary remote isn't functioning. The most frequent causes of key problems with your car remote are circuitry or battery issues.
Battery
It is not uncommon for the battery inside the car key fob to wear out. It is relatively easy to replace a battery, although it is important to make sure that you select the correct one; you can look in the owner's manual or talk to the manufacturer's dealer to find out what kind of battery you require. It is also essential to examine 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. For example, if buttons appear stuck or damaged It may be necessary to take the remote apart and rework its components. You can also try reprogramming your car to recognize the new key fob.
Buttons
Due to frequent use, key fobs could get dirty and worn. This is not atypical however, it can cause buttons to cease working or require a difficult press to get them to function. This can be frustrating especially when you're away from your home and need to start your car. Even broken or damaged buttons can be fixed with a little time and the tools you already have at home.
First, verify that the batteries have been correctly installed and that the indentation at the back of the button is filled. Take the remote apart and examine the circuit board. Check for signs of rust or other signs the buttons have been damaged or worn out. For example the paint that conducts electricity could be missing. Utilizing a Q-tip dipped in alcohol to gently clean any membrane contacts that are damaged or have conductive paint missing. Don't rub too hard as this can damage website the conductive paint and prevent the button from firing when it is pressed.
Check the battery connector terminals carefully for any loose solder connections. If this is the case, simply connecting them back may bring back function to the button. You can use the same process to restore here functionality to any other loose connection in the fob.
If any of the rubber buttons on the front of the keyfob aren't functioning or require to be press extremely hard the graphite disks on the back of the button might have worn out and will require replacement. It is usually done by rubbing a pen across the disks. This should bring the button back to life.
If none of this is useful or if the button doesn't respond to a firm press, then it may be because the circuit board has gone bad. This can be fixed by a quick clean and refitting, but it's best to have an extra fob in case this method doesn't work for you.
Circuitry
If the keys fob buttons are functioning, the circuit board inside your remote might be dirty. A thorough examination is often enough to resolve this issue. Broken cases and water are the most common causes of boards that are dirty. A broken case allows water and other debris to enter and short circuit the electronics. Water can also damage pins and vias, which are tiny connectors that are found on the board.
If you're able to remove your key fob, and you're not afraid of some mess, we can de-solder the buttons and solder new ones in their place. It's also worth checking the connections between battery terminals. If they are loose, the buttons could not function properly or become stuck in mobile car key repair their down position. Soldering terminals and buttons back to their proper positions is usually enough to bring a non-working fob to a working condition.
Non-Remote transponder chips
Sealed non-remote transponder chip are more durable than the remote fobs that have them but they can be broken by a hole being made in them or pushed over by a lawnmower or car door handle. read more Most of the time non-remote transponder chip failures can be attributed to an exploded fuse.
If you're able to open up a sealed non-remote key fob click here and can tolerate the mess, you can take off the circuit board and test the fuse with an instrument to verify diode function. If you're not comfortable with this, you can go to your local Oreilly or hardware store and utilize their RF frequency tester. This will tell you whether the key fob sends an RF signal.
Programming
Key fobs take a lot of abuse and aren't impervious to damage. They can lose their pairing to the receiver in your car because of shock or a low battery, requiring them to be reprogrammed. A professional auto locksmith or a dealer in the main can reprogram your key fob and get it back up and running again. If resetting or replacing the keyfob is not working it may be necessary to replace it.