How to Fix a Key Fob That isn't Working
If your key fob doesn't work then you can fix it with some simple steps. First, ensure that it's not your backup remote.
If your backup remote can unlock and lock the doors of your vehicle, it is likely that the main remote isn't functioning. Most problems with car remote keys are caused by circuitry or battery issues.
Battery
The battery in the key fob may get worn out over the course of time. It is easy to replace a battery. However it is essential that you choose the right type. You can consult your owner's guide or contact the manufacturer to inquire about the right kind. It is also important to examine the battery compartment as batteries that are not working properly can release caustic chemicals that can harm the remote. If changing the batteries does not solve the issue it could be that there are other issues that require professional attention. If the buttons are broken or stuck, for example, it may be necessary disassemble the remote and rework each component. It is also possible to reprogramme the vehicle to recognize the new fob.
Buttons
Key fobs may become filthy and worn out due to frequent use. It is not common to have buttons stop functioning, or require a hefty push to make them work. car remote key repair near me can be a hassle especially when you're away from home and you need to turn on your car. Even malfunctioning or worn-out buttons are often fixable with a little time and materials you already have at home.
First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Take the remote apart and look over the circuit board. Check for signs of corrosion or other indications that the buttons are worn out or damaged, such as missing conductive paint. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that is worn out or where conductive painting is missing. Don't rub too hard as this can damage the conductive paint, and block the button from firing when it is pressed.
Also, be sure to check the battery connector's terminals to ensure an unattached solder connection. Soldering them back in place will restore the button's functionality if this is the situation. You can follow the same method to restore functionality to any other loose connection in the fob.
In the end, if any of the buttons made of rubber on the front of the key fob have stopped working or require a hard press to work it is likely that the graphite disks on the back of the button are deteriorating and need to be replaced. This can usually be done by rubbing a pencil over the disks, which will bring the button back to working.
If none of these solutions work or you are unable to get the button to respond when you press it hard, it is possible that the circuitry is failing. This can be fixed with a quick clean and refitting, but it's recommended to have an additional fob available in the event this method doesn't work for you.
Circuitry
If the key fob buttons function the circuit board that is inside your remote may be dirty. A thorough inspection is usually enough to fix this issue. Broken and damaged cases are the most frequent causes of boards that are dirty. A broken case can let water and other debris to get into the circuit board, which can cause it to short. Water can also eat away at pins and small connectors on the board, which are known as via's.
If you are handy enough to open your key fob, and you don't mind making an mess, you can remove the buttons from their sockets and put in new ones. It's also worth checking the battery terminal connections. They can become extremely dirty and if they're loose, the buttons might not work or even stay in their down position. Soldering the terminals, and putting the button back into place is typically all that's needed to return a non-working key fob to working order.
Non-Remote Transponder Chips
Sealed non-remote transponder chips are more durable than the remote fobs that have them but they can still be cracked by a hole made in them or pushed over by a lawnmowers blade or door handle for a car. Most of the time, non-remote transponder chip failures could be attributed to blowing fuses.
If you're not confident opening the key fob, you may remove the circuitboard and utilize a multimeter to verify that the diode is working correctly. If you're unsure about doing this, go to your local hardware store or the Oreilly's and they'll usually have a RF frequency tester that will tell you whether the key fob is sending signals.
Programming
Key fobs are subject to a lot of abuse and aren't completely indestructible. They may lose their connection 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 to get it working again. In the rarer case that resetting or repairing your key fob isn't working, it could be time to replace it completely.