The No. 1 Question Everybody Working In Remote Key Repair Should Be Able To Answer
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 a few simple steps. The first step is to make sure it's not the backup remote.
If your backup remote is unable to lock and unlock the doors of your vehicle, it is most likely that the primary remote isn't functioning. Most car remote key failures result from battery or circuitry problems.
Battery
It is not unusual to find a battery on a key fob for cars to wear out. It is quite simple to change out the battery, however it is important to ensure you use the right type that you can refer to the owner's manual or talk to the manufacturer's dealer to find out what kind of battery you need. It is also a good idea to examine the battery compartment with care, as dead batteries sometimes leak caustic chemicals that can damage the remote. If replacing the battery does not fix the issue, there may be other issues requiring professional attention. For instance, if the buttons appear stuck or broken, it may be necessary to disassemble the remote and rework its components. You could also try reprogramming your vehicle to recognize the new key fob.
Buttons
Due to repeated use, key fobs could become worn and dirty. This is not atypical however it can cause buttons to cease functioning or require a difficult press to get them to work. This can be frustrating especially when you're away from home and need to turn on your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and some of the materials you may already have around the home.
First, check that the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully open up the remote and examine the circuit board. Examine for signs of rust or other signs the buttons have been worn or damaged. For instance there could be conductive paint missing. Utilizing the Q-tip, dipped in alcohol to gently clean any membrane contacts that have become damaged or have conductive paint missing. Be careful not to rub too hard, as this can erode the conductive painting and prevent the button firing when it is pressed.
Also, be sure to check the battery connector's terminals to ensure a loose solder connection. Soldering them back in place will allow the button to function again If this is the situation. The same method can be used to restore function to any other loose connections in the fob.
If any of the rubber buttons on the front of the keyfob isn't functioning or require to be pressed extremely hard the graphite disks on the back of the button may have worn out and need to replaced. This is usually done by rubbing a pencil on the disks. This should bring the button back to working.
If Highly recommended Resource site of these solutions work, or if you still are unable to get the button to respond when you press it hard, it could be that the circuitry is failing. It is possible to fix this by cleaning and re-soldering the fob but you should also have a spare in case it doesn't work.
Circuitry
The circuit board of your remote control may be dirty, regardless of whether the buttons on the key fob function or not. A thorough inspection will usually resolve this issue. The most common causes of dirty circuit boards are water and damaged cases. A damaged case could allow water and other debris into the circuit board, which can cause it to short. Water can also damage pins and connectors that are small 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 a mess, we can remove the buttons from their sockets and then solder new ones. Also, you should check the connections between battery terminals. If they're loose, the buttons could not function or get stuck in their down position. Soldering the terminals and buttons back into place is typically all that's required to return keys that are not in working condition.
Non-Remote transponder chips
Sealed non-remote transponder chips are much more durable than the remote fobs that contain them but they can still be cracked by a hole that is drilled into them or over by a lawnmowers blade or door handle for a car. Failures of the fuse are typically to blame for non-remote chips failures.
If you're handy enough to open up a key fob that is sealed and are able to bear the mess, you can take off the circuit board and test the fuse using an instrument to verify diode function. If you're not comfortable with this, you can visit your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob transmits an RF signal.
Programming
Key fobs take many abuses and aren't completely indestructible. They may lose their connection to the receiver in your car due to shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or a dealer in the main, can reprogram your keyfob to get it functioning again. If resetting or repairing your keyfob does not work it may be necessary to replace it.