Hello there, I am a Master Automobile Technician certified by Honda and ASE. I can help you with the problem you are having with your Honda!

The security system control is contained within the multiplex control unit which is in the under dash fuse box.

The system needs some inputs before it will arm itself so I imagine if we took one of those inputs away, it would prevent the system from arming when you lock the doors.

The easiest input I can think to alter would be the hood latch switch. If the hood is showing as open then the alarm will not activate when you lock the doors.

I would unplug this hood latch switch then jump the 2 pins together to close the circuit. This is the position it would be with the hood open. By unplugging then jumping the two wires together, we've effectively fooled the system into thinking the hood is open even when it is physically shut. This should keep the system from arming itself.

The next question is why is this alarm going off on its own. Again we would need to look at the inputs to the system to see what is going on there. Unfortunately, the only way to do that would be with a scan tool hooked up so you can look at what is tripping the alarm. As I said previously, the security system watches many inputs whcih control how it is going to behave. You could have an input that is out of adjustment or overly sensitive, causing the alarm to go off.

Really the best and easiest way of finding this rogue input is to have the dealer hook their scan tool up to see what is going on.

In the mean time we can disable it as I have described. Just be sure to remove our bypass before taking it to the dealer for diagnosis.

If you need help jumping the hood latch switch, let me know and I will be more than happy to help. Thanks!