How to Repair a Remote Key
While most remote key fobs are equipped with amazing battery lives, they'll eventually run out of battery. Sometimes it's as easy as changing the batteries, however sometimes there are more serious issues.
A quick fix that can help is taking apart the remote and cleaning the buttons before flexing them in and out. These methods could be all you need to get the key fob to work.
Battery
If the fob is still working, you can swap out the CR2025 or CR2032 battery. If it's not, you can open the fob and check the batteries' terminals and buttons for any signs of looseness or damaged parts. You should be able to connect the terminals and buttons back into their original positions. However, you will be required to know which kind of battery is being used in your fob.
If you're unsure whether the battery is the problem you can make use of a backup fob to unlock or start your car. If you can, then it's time to replace the primary fob. If it doesn't require replacement, you'll need to have a professional examine it to find the issue. car key fob repairs could be as simple as reset, or it could require other types of repair. You may also find that your vehicle has lost the fob. This isn't something you can do on your own.
Case
The plastic housing that covers the outside of a remote is referred to as the case. It is usually equipped with an additional button pad. It is essential to choose a new case, as the original will probably be quite dirty, and it is essential that the circuit board is installed correctly in the case. The circuit board is responsible for the function of the key fob and can be tested using a standard multimeter by setting it to the RF (radio frequency) mode and then holding a radio scanner tuned to the frequency the key fob is using close to it, and listening for signals that pulsate upon the button's presses.
Another thing to look at is the contact points for buttons on the keypad, which might be loose or damaged in the course of time. Soldering them back to their original position will often allow them to return to full functionality, in the event that they snap completely.
Buttons
IF your key fob buttons do not function anymore or are difficult to press for any reason, a motormite or dorman remote key housing replacement could be purchased online for a reasonable price for your year/make and model. Then pop the circuit board from your old case into the new. On some models, you may need to adjust the board's position slightly. The black contact points of the buttons can be bonded to using aluminum foil and double-sided tape.
Programming
The key fob and receiver inside your car are connected, but this connection can be damaged. A professional will assess the car to determine the make of the vehicle, year of manufacture and model. They employ specialist equipment to re-pair or program the fob with a blank transponder chip (or make a key replica in the event that it is possible). They will then test the remote to ensure that it functions.
When programming blank keys it is crucial to be careful. The process is complex and each manufacturer has distinct instructions. It is also easy to skip a step or wait too long before exiting the programming mode, so it is recommended to hire an expert with a thorough understanding of your car's security system to reduce the chance of harming the car. Some key programming tools can also be capable of analyzing diagnostic trouble codes from your vehicle. This can aid in repairing or resolving other issues.