How to Repair a Remote Key
Although most remote key fobs boast amazing battery life, they do eventually wear out. Sometimes it's simple to replace the batteries inside the device, but in other cases the issue could be more serious.
One quick fix that may help is taking apart the remote, cleaning the buttons and stretching them out and in. These methods could be all that you require to get your key fob working again.
Battery
If the fob is functioning it is possible to swap out the CR2025 or CR2032 battery. If not, inspect the battery terminals or buttons to determine if they are any loose parts. Most of the time, the buttons and terminals can be re-soldered back into place however you'll need be aware of the kind of battery your fob uses.
If you're not sure if the battery is the problem then use a backup fob to unlock or start your car. If car keys repairs can, then it's time to replace the primary fob. If not, a professional inspection is necessary to determine the reason it's not functioning properly. It could be as easy as reprogramming or it may require other repairs. You may also find that your car has lost the fob. This is not something you can tackle by yourself.
Case Study
The case of remote keys is the plastic case that surrounds it and usually comes with the replacement button pad. It is crucial to get a new case, as the original case is likely to be pretty grungy, and it is essential that the circuit board is placed correctly inside the case. The circuit board is what is responsible for controlling the function of the key fob. You can test it by using an instrument set to RF (radiofrequency) mode, and a radio scanner that is tuned to the same frequency as the key fob.
Check the contact points of the keys on the keypad. They may be loose over time or have been damaged. Soldering them back to their original position can often restore them to their original function, unless they break completely.
Buttons
If the buttons on your key fob do not function anymore or are difficult to press you may need a dorman or motormite key housing replacement for your remote can be purchased for a low price online for the year, make and model of your. Then, simply pop the circuit board out of your old case into the new. You may need to adjust the position of the circuit board on certain models. You can then use aluminum foil with double sided tape to stick to the black contact points on the buttons.
Programming
The key fob is connected with the receiver inside your vehicle and this connection can be corrupted. A professional will inspect the vehicle to determine the make of the vehicle, year of manufacture and model. They make use of specialist equipment to repair or program a blank fob or transponder chip (or duplicate a key should this be possible). Then they will test the remote to make sure it works.
When programming blank keys it is essential to take care. The process can be complicated and each manufacturer comes with slightly different instructions. It is also possible to miss a step or wait too long before exiting the programming mode, so it is recommended to hire a professional with comprehensive knowledge of your car's security system to reduce the chance of damaging your car. Certain programming tools can also be capable of analyzing diagnostic trouble codes from your vehicle. This can help repair or troubleshoot other problems.