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How to Fix a Key Fob That isn't Working
If your key fob doesn't work There are a few simple steps that can fix it. The first step is to be sure it's not the backup remote.
If your backup remote cannot unlock and lock the doors of your car, then it is likely that the main remote is not working. The most common causes of car remote key failure are battery or circuitry issues.
Battery
It is not unusual for the battery inside a car key fob to wear out. It is simple to replace batteries. However, it is important that you use the correct type. You can check the owner's manual or contact the manufacturer to find out the right type. It is also a good idea to examine the battery compartment thoroughly since dead batteries may leak caustic chemicals that can damage the remote. If replacing the batteries doesn't solve the issue it could be because there are other issues that require attention from a professional. If the buttons are damaged or stuck for instance, it may be necessary remove the remote and rebuild each component. You could also try reprogramming the vehicle to recognize the new fob.
Buttons
Key fobs may become dirty and worn-out from frequent use. It is not common for buttons to stop working, or to require a hefty push to make them work. This can be extremely frustrating particularly if you're away from home and need to start your vehicle. Even broken or damaged buttons can be fixed with a little effort and tools you already have at home.
First, make sure that the batteries are properly placed and that the indentation at the back of the button is filled. Then, carefully open up the remote and inspect the circuit board. Examine for signs of rust or other indications that buttons are worn out or damaged, such as missing conductive paint. Utilizing a Q-tip dipped in alcohol, gently clean any membrane contacts that have become damaged or where conductive paint is missing. Be careful not to rub too hard, because this could damage the conductive paint and block the button from firing when the button is pressed.
Check the battery connector's terminals carefully for any loose solder connections. Soldering them back into place will allow the button to function again in the event that this is the situation. You can apply the same procedure to restore functionality to any other loose connection inside the fob.
If any of the rubber buttons located at the front of the keyfob isn't functioning or require to be pressed very hard, the graphite disks at the back of the button could have worn out and require replacement. It is usually done by rubbing a pen across the disks. This will bring the button back to life.
If all of this doesn't help or if the button doesn't respond to a firm press It could be the case that the circuit board itself has become damaged. This can sometimes be repaired by a quick clean and replacing the solder, but it is best to have an extra fob on hand in the event that this method fails for you.
Circuitry
The circuit board in the remote control could be dirty, regardless of whether the buttons on the key fob function or not. A thorough inspection is often enough to resolve this issue. Water and broken cases are the most frequent causes of boards that are dirty. A broken case allows water and other debris to get in and short out the electronic components. Water can also damage pins and connectors on the board, referred to as 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 then solder new ones. It's also worth checking the connections between battery terminals. If car key repairs g28carkeys are loose, the buttons could not work or even become stuck in their down position. Soldering the terminals and buttons to their original positions is often enough to bring a non-working fob to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are much more durable than the remote fobs that contain them but they can be cracked by a hole drilled into them or run over by a lawnmowers or door handle for a car. The failure of the fuse is usually to blame for non-remote chip failures.
If you are not comfortable opening the key fob, you may remove the circuitboard and utilize a multimeter to verify that the diode is functioning correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and utilize their RF frequency tester. This will let you know whether the key fob transmits a signal.
Programming
Key fobs are subject to a lot of abuse and aren't completely indestructible. They can lose their pairing with the receiver inside your vehicle due to shocks or low battery, requiring reprogramming. A professional auto locksmith or a main dealer can reprogram your key fob and get it back up and running. If resetting or repairing your keyfob does not work, you may need to replace it.