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How to Fix a Key Fob That isn't Working
If your key fob doesn't work and you're not sure why, you can fix it with some simple steps. The first step is to be sure that it's not the backup remote.
If your backup remote is unable to lock and unlock the doors of your car, then it is most likely that the primary remote is not working. The most common causes for car remote key failure are circuitry or battery issues.
Battery
The battery inside the key fob could get worn out over the course of time. It is relatively easy to change out the battery, however it is essential to make sure that you use the right type; you can look in your owner's manual or contact the dealer for the manufacturer to determine the type of battery you need. It is recommended to inspect the battery compartment thoroughly since dead batteries may leak harmful chemicals that can damage the remote. If changing the battery doesn't fix the issue there may be additional issues that require professional attention. If buttons are damaged or stuck, for example it might be necessary to disassemble the remote and rework each component. You can also try reprogramming your car to recognize the new key fob.
Buttons
Key fobs may become filthy and worn out due to repeated use. It is not unusual for buttons to cease functioning, or require a hard push to make them work. This can be a hassle particularly when you're away from your home and have to start your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and a few materials you have in the house.
First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully remove the remote and look at the circuit board. Look for signs of rust or other signs the buttons are damaged or worn. For example there could be conductive paint missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that is worn out or where conductive painting is missing. Don't rub too hard, as this could erode the conductive paint, and block the button from firing when it is pressed.
Check the battery connector terminals for loose solder connections. Soldering them back in place can restore the button's functionality if this is the case. You can get more info follow the same process to restore functionality to any other loose connection in the fob.
If any of the rubber buttons on the front of the keyfob isn't working or need to be press very hard the graphite disks on the back of the button may have worn out and will need to replaced. You can do this by rubbing a pen over the disks. This should bring the button to life.
If none of this is helpful click here or if the button still doesn't respond to a hard push, then it may be because the circuit board itself is damaged. It is possible to fix this issue by cleaning and re-soldering the button however, you should have an extra in case it does not work.
Circuitry
If the key fob buttons are working, the circuit board inside your remote may be dirty. A thorough inspection is often enough to resolve this problem. Broken cases and water are the most frequent causes of dirty boards. A broken case allows water and other debris to get in and short out the electronic components. Water can also get through pins and vias, which are small connectors that are found on the board.
If you're handy enough to open your key fob, and you're not afraid of making a mess, we can remove the solder from the buttons and put new ones in click here their place. It's also worth examining the battery click here terminal connections. If they are loose, the buttons could not work or even become stuck in their down position. Soldering the terminals and buttons into place is usually enough to bring a non-working fob back to working.
Non-Remote transponder chips
The sealed non-remote chips are more durable than remote fobs. However, they are susceptible to breaking when a hole is made into them or in the event that a door handle of a car or lawnmower runs over them. Fuse failures are usually the cause of non-remote chip failures.
If you're not confident opening the key fob, take the circuit board off and use a multimeter to verify that the diode is working properly. If you don't feel comfortable with this, you can visit your local Oreilly or hardware store and test their RF frequency tester. This will let you know whether the key fob is sending a signal.
Programming
Key fobs aren't impervious to destruction and can here be damaged through a variety of causes. They can lose their pairing to the receiver in your car due to shock or low battery, which calls for the reprogramming. A professional auto locksmith or main dealer will be able to reprogram your key fob and get it back up and running. If resetting or repairing your key fob fails it may be necessary to replace it.