How to Repair a Remote Key
While the majority of remote key fobs are equipped with impressive battery lives they will eventually wear out. Some times it is as simple as changing the batteries inside the device but sometimes the issue can be more serious.
One quick fix that may help is dismantling the remote by cleaning the buttons and stretching them out and in. These steps could be all that you require to get your key fob working again.
Battery
If the fob is working, you can swap out the CR2025 or CR2032 battery. If not, inspect the battery terminals or buttons to determine if they are any loose parts. The terminals and buttons can be soldered back in place but you'll need be aware of the kind of battery your fob uses.
If you're not sure whether the battery is the issue you can make use of a backup fob to start or unlock your car. If you can, then it's time to replace the primary fob. If not, key fob repair will require a professional assess the fob to identify the problem. It could be as easy as reprogramming or it may require other repairs. There's also the possibility that your vehicle forgotten your fob that you can fix yourself.
Case Study
The outer plastic housing of a remote is called the case. It usually comes with an additional button pad. It is best to use a brand new case, because the one you have case is likely to be quite filthy. Also, it is crucial that the circuit board within the case is correctly placed. The circuit board is what determines the function of the key fob. You can test it by using a multimeter set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob.
Another thing to examine is the button contact points on the keypad, which may be loose or damaged in the course of time. Soldering them back in place can often restore them to their original functionality, unless they break completely.
Buttons
IF your key fob buttons 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 online for a reasonable price for your year/make and model. Then, pop Suggested Looking at from your old case and into the new one. You may have to slightly adjust the position of your circuit board on certain models. The black contact points of the buttons can be bonded to using aluminum foil and double-sided tape.
Programming
The key fob and the receiver in your car are linked however, this connection may be corrupted. A professional will assess the vehicle to determine the make of the vehicle, year of manufacture and model. They use specialist equipment to re-pair or program the fob with a blank transponder chip (or clone a key in the event that it is possible). They will then test the remote to make sure that it functions.
It is crucial to be careful when reprogramming the blank key, because the process can be complicated and different manufacturers have slightly different steps. It is easy to skip a step or wait too long before exiting the programming mode. To avoid the risk of damaging your vehicle it is recommended to work with an expert with extensive knowledge of the security system in your vehicle. Some key programming tools are also capable of analyzing diagnostic trouble codes from your vehicle, which can help repair or troubleshoot other issues.