Give this guide a read, specifically towards to bottom where it gives specifics about Honda systems.
It sounds like what happened is the security system was activated and disconnecting the battery will not disable it. Basically, the vehicle thinks it is being stolen so it is sounding the alarm. Have you tried putting the key in the ignition and trying to start it? Also, another thing I would try is putting the key in the drivers door and holding it in the unlock position for 2 seconds then open the door.
Saturday, August 17th, 2019 AT 6:36 PM