Changing the Battery in Your Mazda 3 Key Fob
It's a pain to pull into your car at the conclusion of a long and tiring day and find that the key fob is dead. This is a simple fix that can be found at a big box retailer or at a hardware store.
Adding a spare key fob to your Mazda 3 can be an inexpensive way to save yourself from the hassle of being towed to the dealership and having them reprogram your keys.
Battery Replacement
Removing the battery from your Mazda 3 key fob is an easy process that can do at home. It is recommended to replace it if the battery is dead or you see a message saying "Low keyfob battery" on the multi-information display. Replace battery."
You'll need to use an flathead screwdriver along with tape and patience to open the case. Locate a notch or gap in the bottom part of the metal of the Mazda 3's key fob, and then insert the head of the screwdriver into it to pry off the lower half. Repeat this process for the top part of the metal but be careful not to scratch the rubber ring that is at the bottom of the key fob's case.
There's a slot the opposite side of the case that houses the battery. Start on the opposite side of the case and gently push it open. Take out the old CR2025 and replace it with a brand new one, making sure that you put it on its face to ensure proper polarity. Then, put the cap back on and reattach both sides to the key fob case. Keep pressing until you can hear them click.
After replacing the battery Test the fob to confirm it's working by locking and unlocking your doors. If everything is in order you're now able to use the Mazda 3's remote functions to drive again!
Pairing Issues
If your key fob stopped working suddenly it could be because the transmitter inside the car is damaged. It is usually a job for a professional, and you require a new key fob.
If you've tried replacing the battery and programming the key fob, but does not solve the issue it is possible that the chip inside the key fob could be faulty. This could happen if the key fob was dropped on hard surfaces, exposed to salt water or even brushed by dirty hands.
To identify the issue You will need to find a small "key" embedded in the edge of the fob which allows you to open it up and take out the circuit board. You can then examine the electronic chip for damage or corrosion. It is best to clean the paper towel to prevent damaging the microchip.
You may also examine the battery connector terminals to determine if they're damaged or cracked. If this is the case, carefully reconnecting them can generally restore the functionality of the key fob. Also, you can check the buttons to determine whether they're worn or damaged. If the buttons are loose, they can be soldered back to their original position unless they have physically snapped.
Interference Signals
There is nothing more frustrating than glancing at a "No Fob Detected" message when trying to start your vehicle. This usually occurs at the most awkward time, such as when you're late for work or if you're picking up kids from daycare/school. There are several things you can do to troubleshoot and find out the root of the issue.
Interference signals can interfere with the remote key fob's signal to the vehicle making it unable to function correctly. This could be caused by objects such as weather conditions, buildings, and transmitters that operate on the same frequency. Interference could occur if your vehicle is equipped with aftermarket equipment that transmits at the same frequency as your key fob.
The key fob could be damaged if exposed to water or salty water. The rubber seals on the chip's electronic components can be shattered by water, especially in the event that it is submerged for long periods of time, like in the ocean or a pool at the beach. mazda 2 spare key may stop working and require replacement of the keyfob. If you have a programable key, you can clean the chip with isopropyl Alcohol or an electronic cleaner to aid in its get back to its original functionality. If this doesn't work the chip, it's likely to be damaged and needs to be replaced.
Locking/Unlocking of the Doors
The key fob's buttons send electronic signals to a solenoid in the car, which converts that signal into a mechanical action that locks and unlocks doors. If your door lock isn't working, it could be an issue with the solenoid. This will require professionals from repair shops to look into.
A dead 12 volt battery could also hinder the fob from working properly. This could happen if the battery is unable to charge or if the contacts become corroded, and stop transferring electricity. The problem can be addressed in a matter of minutes by replacing the battery.
The receiver module could be the problem if the key fob does not function after replacing batteries or reprogram the device. This device interprets radio frequency signals received by the key fob to control the vehicle. If it malfunctions, it can be expensive to fix.
To test if this is correct, place your spare key into the key slot. Then, turn the ignition on. Press the key fob two times within 10 seconds, but without taking it out. The Mazda 3 system synchronizes the key to the vehicle, and you can now use it as your primary driving remote. This allows you to program up to three keys.