10 Tell-Tale Signals You Should Know To Buy A Remote Key Repair
How to Fix a Key Fob That isn't Working
If your key fob isn't working A few easy steps can fix it. The first step is to make sure that it's not your backup remote.
If your backup remote cannot lock and unlock the doors of your car, then it is most likely that the primary remote isn't working. Most problems with car remote keys result from circuitry or battery problems.
Battery
It is not uncommon to find a battery on a key fob for cars to degrade. It is quite simple to change out the battery, however it is important to ensure you select the correct one; you can look in your owner's manual or contact the manufacturer's dealer to find out what kind of battery you require. It is also crucial to inspect the battery compartment as dead batteries can leak toxic chemicals that could damage the remote. If changing the batteries doesn't solve the problem it could be because there are other issues that require professional attention. For instance, if the buttons appear stuck or broken It may be necessary to take the remote apart and rework its parts. You can also try reprogramming the vehicle to recognize the new remote.
Buttons
Key fobs may become filthy and worn out due to frequent use. It is not uncommon to have buttons stop functioning, or require a hefty press to make them work. This can be extremely frustrating particularly if you're out of town and need to start your car. Even malfunctioning or worn-out buttons are often fixable with a bit of time and the tools you already have at home.
First, make sure the batteries are properly charged 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, like missing the conductive paint. Use the Q-tip, dipped in alcohol to gently clean any membrane contacts that are damaged or have conductive paint missing. Avoid rubbing too hard, because this could damage the conductive paint and block the button from firing when pressed.
Check the battery connector terminals carefully for any loose solder connections. If this is the case, soldering them back in place could restore function to the button. The same method can be used to restore function to any other loose connections in the fob.
If any of the rubber buttons located at the front of the keyfob aren't working or require being press extremely hard the graphite disks on the back of the button could have worn out and need to replaced. This can be done by rubbing a pencil on the disks, which should bring the button back to working.
If none of these solutions work or you cannot get the button to respond when pressed hard, it is possible that the circuitry is failing. It is possible to fix the issue by cleaning and re-soldering the button, but you should have an extra in case it doesn't work.
Circuitry
The circuit board inside your remote control may be dirty, regardless of whether the buttons on the key fob function or not. A very thorough inspection is usually enough to fix this issue. The most frequent causes of dirty circuit boards are water and damaged cases. A broken case allows water and other debris to get in and short circuit the electronics. Water can also damage pins and connectors on the board called via's.
If you're able to open your key fob, and you don't mind making an mess, you can take the buttons out of their sockets and put in new ones. It's also worth checking the battery terminal connections. They can get very filthy and if they're not tight enough, the buttons may not work or even stick in their down position. Soldering the terminals back to their proper positions is usually enough to return a malfunctioning fob back to working.
Non-Remote transponder chips
Sealed non-remote transponder chips are much more durable than remote fobs that contain them but they can still be 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 chips failures.
If you're not confident opening the key fob, you may take the circuit board off and use a multimeter to check that the diode is functioning correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. remote key fob repair will tell you whether the key fob transmits a signal.
Programming
Key fobs take 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 a main dealer will be able to reprogram your key fob and get it back up and running. If, in the unlikely event that resetting and fixing your key fob doesn't work it could be the time to replace it all over again.