How to Fix a Key Fob That isn't Working
If your key fob doesn't work then you can fix it by following some simple steps. First, make sure that it's not the backup remote.
If your backup remote can unlock and lock the doors of your car, then it is likely that the primary remote isn't working. The most frequent causes of key problems with your car remote are battery or circuitry issues.
Battery
It is not uncommon to find a battery on a key fob for cars to wear out. It is simple to replace a battery. However it is crucial that you choose the right kind. You can refer to your owner's manual or call the manufacturer to inquire about the right kind. It is also essential to inspect the battery compartment, as batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the batteries doesn't solve the issue, it may be that there are other issues that require attention from a professional. For instance, if buttons seem to be stuck or damaged It may be necessary to take the remote apart and rebuild its components. You could also try reprogramming your vehicle to recognize the new key fob.
Buttons
Key fobs may become filthy and worn out due to frequent use. It is not unusual to have buttons stop functioning, or require a hefty push to make them work. This can be frustrating particularly when you're away from your home and you need to start your car. Fortunately, even worn out or damaged buttons can be fixed with just a bit of time and a few materials you may already have around the home.
First, check that the batteries have been correctly inserted and that the indentation on the back of the button has been filled. Then, carefully open up the remote and inspect the circuit board. Look for signs of corrosion or other signs that buttons are worn out or damaged, such as missing paint that is conductive. Use mouse click the up coming document -tip dipped into rubbing alcohol to gently clean any membrane contact that has damaged 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 it is pressed.
Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back in place can restore the button's functionality in the event that this is the situation. The same method can be used to restore functionality to any other loose connections in the fob.
If, for instance, any of the rubber buttons on the front of the key fob aren't working or require a very long press to function, it is likely that the graphite disks on the back of the button are deteriorating and require replacement. This is usually done by rubbing a pencil across the disks. This should bring the button back to its original state.
If none of these solutions work or you cannot get the button to respond when pressed hard, it is possible that the circuitry has failed. It is possible to fix this by a quick clean, and refitting, but it's ideal to have a spare fob available in the event this method fails for you.
Circuitry
If the keys fob buttons are functioning the circuit board that is inside your remote may be dirty. This problem can be resolved through a thorough examination. The most frequent causes of dirty circuit boards is water and broken cases. A damaged case can let water and other debris to enter the circuit board, which can cause it to short. Water can also destroy pins and small connectors on the board called via's.
If you're skilled enough to open your key fob, and don't mind making some mess, we can remove the buttons from their sockets and solder in new ones. Also, you should check the connections between battery terminals. If they are loose, the buttons may not function or get stuck in their down position. Soldering the terminals, and putting the button back in place is usually all that's needed to return the key fob that is not working to functioning condition.
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 that is drilled into them or over by a lawnmower or door handle for a car. Fuse failures are usually to blame for non-remote chips failures.
If you're not comfortable opening the key fob, remove the circuitboard and use a multimeter to verify that the diode is functioning correctly. If you're unsure about doing this, head to your local hardware store or the Oreilly's and they usually have an RFID frequency tester that can tell you whether the key fob sending a signal.
Programming
Key fobs aren't impervious to destruction and can be damaged by a lot of things. 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 main dealer will be able to reprogram your key fob to get it functioning again. If, in the unlikely event that resetting and fixing your key fob doesn't work it could be the time to replace it completely.