How to Repair a Remote Key
While the majority of remote key fobs are equipped with excellent battery life, they will eventually wear out. Sometimes it's as simple as changing the batteries, however sometimes there are more serious issues.
An easy fix that could help is taking apart the remote by cleaning the buttons and flexing them in and out. These steps could be all you require to get your key fob back in working order.
Battery
Car key remotes use CR2025 or CR2032 batteries and they can be replaced if the fob is still functional. If not, inspect the battery terminals or buttons to see if there are any missing parts. You can usually connect the terminals and buttons back in place. However, you'll need to know what kind of battery is being used in the fob.
If you're unsure whether the battery is at fault, utilize a backup fob in order to start or unlock your vehicle. If you can then it's time to replace your primary fob. If not, a professional inspection is required to determine why it's not working correctly. It could be as simple as reset, or it could require other types of repair. You might also discover that your car has lost the fob. This isn't something you can tackle by yourself.
Case Study
The outer plastic enclosure of a remote is known as the case. It usually comes with an alternative button pad. It is best to use an entirely new case since the original one will likely to be extremely grungy. Additionally, it is crucial that the circuit board inside the case is properly positioned. The circuit board determines the function of the key fob. You can test it with a multimeter set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob.
Another thing to look at is the button contact points on the keypad. my latest blog post might have become loose or broken over time. A careful soldering process to put them back in their original position can usually restore them to their original function unless they break completely.
Buttons
If the buttons on your key fob aren't working or are difficult to push, you can purchase a new dorman or motormite remote key housing on the internet at a the lowest cost for the model/year/make. Then, simply pop the circuit board from your old case into the new. In some cases, you may need to adjust the position of the board slightly. The black contact points of the buttons can be bonded to aluminum foil using double-sided tape.
Programming
The key fob and receiver inside your car are linked however this connection could be ruined. A professional will assess your vehicle to determine its year, make and model. They will then use specialist equipment to reconnect or program the transponder chip with a blank fob (or duplicate the key if possible). Then they test the remote to be sure it functions.
When programming blank keys, it is important to take care. The process can be complicated and each manufacturer comes with slightly different instructions. It is easy to skip a step or to wait too long to exit the programming mode. To reduce the chance of damaging your vehicle it is recommended to work with a professional who has extensive knowledge of the security system in your vehicle. Certain key programming tools can also read diagnostic trouble codes in your vehicle. This will help you repair or troubleshoot other issues.