How to Repair a Remote Key
Although most remote key fobs have an impressive battery life, they will eventually degrade. Some times it is as simple as replacing the batteries inside the device, but in other cases the issue can be more serious.
Remove the remote from the unit and clean the buttons. Then, flex car keys repair out and in. These methods could be all you need to get the key fob working.
Battery
Car key remotes use CR2025 or CR2032 batteries, and they can often be replaced in the event that the device is operational. If not, you can look at the battery terminals and buttons to determine if there are any parts that are loose. You can usually connect the terminals and buttons back in place. However, you will have to know the type of battery is used in your fob.
If you're not sure whether the battery is at fault then use a backup fob to start or unlock your car. If you can do so, it's probably time to replace your primary fob. If it's not, a professional inspection is required to determine why it's not working properly. It could be a simple reset, or it could require other types of repairs. You may also find that your vehicle has forgotten the fob. This is not something you can fix on your own.
Case Study
The case of a remote key is the plastic housing that covers the outside and usually comes with the replacement button pad. It is crucial to get a new case as the original one is likely to be a bit shabby, and it is essential that the circuit board is placed properly in the case. The circuit board is what controls the key fob's function. 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 contact points for buttons on the keypad, which might be loose or damaged in the course of time. Soldering web page to their original position will often allow them to return to full function, except if they break completely.
Buttons
If the buttons on your key fob don't work anymore or are difficult to press, a dorman or motormite remote key housing replacement could be bought inexpensively online for the year/make/model you have. Then pop the circuit board from your old case into the new one. In some cases it may be necessary to adjust the position of the board slightly. You can then apply aluminum foil with double sided tape to stick to the black contact points on the buttons.
Programming
The key fob and receiver in your car are connected however, this connection may be corrupted. A professional will assess the car to determine the make model, year and model. They will make use of specialist equipment to repair or program the fob with a blank transponder chip (or duplicate a key should this be possible). Then they will test the remote to make sure it works.
It is crucial to be careful when reprogramming the blank key, because the process can be a bit complicated and different brands require slightly different steps. It is also possible to miss a step, or wait too long before exiting the programming mode, therefore it is best to use a professional with comprehensive knowledge of the security system of your vehicle to avoid damaging your car. Certain programming tools can also be capable of analyzing diagnostic trouble codes from your vehicle. This can aid in repairing or resolving other problems.