How to Fix a Key Fob That isn't Working
If your key fob isn't functioning There are a few simple steps that can be taken to fix it. First, check to make sure it's not your backup remote.
If your backup remote is unable to unlock and lock the doors of your car, then it is likely that the main remote isn't functioning. Most problems with car remote keys result from battery or circuitry problems.
Battery
It is not uncommon for the battery inside a car key fob to wear out. It is simple to replace a battery. However it is crucial that you use the correct type. You can consult your owner's manual or call the manufacturer to determine the right type. It is also important to examine the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the issue, it may be that there are other issues that require professional attention. If the buttons are broken or stuck, for example it might be necessary to take the remote apart and rework each component. You can also try reprogramming the vehicle to recognize the new fob.
Buttons
Key fobs can get dirty and worn out from repeated use. It is not uncommon for buttons to cease working, or to require a long push to make them work. This can be very frustrating particularly when you're away from home and you need to switch on your car. Even worn-out or malfunctioning buttons are often fixable with a bit of time and materials you already have at home.
First, verify that key repair for car are properly installed and that the indentation at the back of the button has been filled. Then, carefully remove the remote and inspect the circuit board. Look for evidence of rust, or other signs the buttons have been damaged or worn out. For car key repair cost , conductive paint may be missing. Utilizing a Q-tip that has been dipped in alcohol to 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 painting and prevent the button firing when it is pressed.
Check the battery connector's terminals carefully for any loose solder connections. Soldering them back to their original position will restore the button's functionality in the event that this is the case. You can apply the same method to restore functionality to any other loose connection in the fob.
If, for instance, any of the buttons made of rubber on the front of the key fob stop functioning or require a hard press to work it is likely the graphite disks at the back of the button are wearing down and require replacement. You can do this 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 hard push It could be because the circuit board itself has gone bad. It is possible to fix this by a quick clean, and replacing the solder, but it is best to have an extra fob available in the event this method does not work for you.
Circuitry
If the key fob buttons function, the circuit board inside your remote might be dirty. This issue can be fixed through a thorough examination. The most common causes of dirty circuit boards are water and damaged cases. A damaged case can allow water and other debris to enter and short circuit the electronic components. Water can also eat through pins and vias, which are small connectors that are found on the board.
If you're able to open your key fob, and you're not afraid of making a mess, we can take off the buttons and put new ones in their place. It's also worth examining the battery terminal connections. They can become very filthy and if they're not tight enough, the buttons might not work or may even remain in their down position. Soldering the terminals, and putting the button back in place is usually all it takes to restore the key fob that is not working to functioning condition.
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 in them, or in the event that a door handle of a car or lawnmowers is pushed over them. 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 can remove the circuitboard and use a multimeter to determine if the diode is functioning properly. If you're not comfortable doing this, head to your local hardware store or the Oreilly's and they usually have an RF frequency tester that will determine whether the key fob sending a signal.
Programming
Key fobs aren't indestructible and can be damaged by a variety of factors. 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 can reprogram your key fob to get it back up and running. In the event that resetting and fixing your key fob doesn't work it may be time to replace it completely.