When you start the bike the ABS and BMU delta warnings will display. After the bike rolls about ten feet, the lights should cycle off, sometimes the front and rear brake may need a light tap. The usual suspect causing the delta warning to stay on is a bad brake light bulb, which you don't usually notice unless you ride the bike ten feet, leave it running, and activate the brakes to verify the brake light comes on. Go replace your rear brake light bulb and report back.