Join Date: Nov 2008
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I may have a solution for anyone having this issue. I work for the company that makes the FOBIKS. We have had quite a few warranty FOBIKS returned lately for this issue. The trunk opens by itself, or the doors lock/unlock themselves, even the windows roll down.
After analyzing these parts, we were able to figure out what was causing these "Hauntings".
Here's the issue,
The FOBIK has a rubber mat with the button graphics on it. If you open your FOBIK, the bottom side of the rubber mat has metal discs called "Snap Domes". The sanp domes are what give each button that snap feel when you press it. Each of these snap domes are made of stainless steel, coated in a black carbon paint to give them extra conductivity. When you press the button, the snap dome completes the circuit for that button and the FOBIK transmits.
The issue is that sometimes a small piece of the carbon coating can break away from the stainless steel and get trapped under the snap dome. Even a very, very small piece of this is enough to create this problem.
Because the carbon material is very conductive, and it is trapped beneath the snap dome, it can complete the circuit very easily and make the FOBIK transmit. Depending on which button this happens to, this can create a variety of issues.
If this phenomenon occurs beneath most buttons, the outcome is very predictable but is most annoying when it happens beneath the Unlock button. That can randomly unlock the car, but also can make your windows roll down. Not good if it's raining out.
The FIX is very simple. Just open up the FOBIK, and use a q-tip and wipe both the PCB where the snap domes make contact, and also wipe off the underside of the snap domes. Remove any loose black residue. Once gone, the problem should go away as well.