How to Fix a Key Fob That isn't Working
If your key fob isn't working There are a few simple steps that can fix it. The first step is to make sure it's not the backup remote.
If the backup remote is able to lock and unlock your car doors then there's a likely issue with the main remote. Most car remote key failures are caused by circuitry or battery problems.
Battery
The battery inside a key fob can be worn out over time. It is simple 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 correct type. It is also important to examine the battery compartment, as batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the battery does not solve the issue there may be additional issues that require attention from a professional. If buttons are stuck or broken, for example it might be necessary to disassemble the remote and rework each component. You can also try reprogramming your vehicle to recognize the new key fob.
Buttons
From repeated use, key fobs may get dirty and worn. It is not common to have buttons stop working, or to require a long press to get them working. This can be very frustrating particularly when you're away from your home and need to turn on your car. Even malfunctioning or worn-out buttons are often fixable with a little time and tools you already have at home.
First, ensure that the batteries are properly charged and that the indentation on the back of the button is filled. car key fob repairs near me and examine the circuit board. Examine for signs of rust or other indications that the buttons are worn or damaged, such as missing conductive paint. Use a Q-tip dipped into alcohol to gently clean any membrane contact that is damaged or where conductive paint is missing. Do not rub too vigorously, as this could erode the conductive paint, and block the button from firing when pressed.
Check the battery connector terminals carefully for any loose solder connections. Soldering them back into place 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 within the fob.
If, for instance, 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 the graphite disks that are on the back of the button are wearing down and need to be replaced. This can be done by rubbing a pencil on the disks. This should bring the button back to its original state.
If all of this doesn't help, or if the button doesn't respond to a hard push It could be the case that the circuit board itself has gone bad. It is possible to fix this by a quick clean, and replacing the solder, but it is recommended to have an additional fob on hand in the event that this method does not work for you.
Circuitry
Whether or not the keys fob buttons are functioning the circuit board that is inside your remote might be dirty. A thorough examination is usually enough to fix this problem. Broken cases and water are the most common causes of dirty boards. A damaged case can allow water and other debris to enter the circuit board, which can cause it to short. Water can also eat away at pins and connectors on the board called 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 then solder new ones. Also, it's worth checking the connections between battery terminals. If they are loose, the buttons may not function properly or become stuck in their down position. Soldering the terminals back to their proper positions is usually enough to restore a non-working fob back to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are more durable than the remote fobs that have them however they are still susceptible to being damaged by a hole that is drilled into them or run over by a lawnmowers blade or door handle for a car. The failure of the fuse is usually to blame for non-remote chip failures.
If you're able to open a sealed non-remote key fob and are able to bear the mess, you can easily remove the circuit board and check the fuse with a multimeter to ensure that it is functioning as intended. function. If you're unsure about doing this, go to your local hardware store or the Oreilly's and they will usually have an radio frequency tester that can tell you whether the key fob is sending signals.
Programming
Key fobs are subject to many abuses and aren't indestructible. They can lose their pairing with the receiver inside your vehicle because of shocks or a low-battery, which requires reprogramming. A professional auto locksmith or main dealer can reprogram your key fob and get it back functioning again. If, in the unlikely event that resetting and repairing your key fob doesn't work it may be time to replace it completely.