Working on 07 S60 2.5T fuel pump. I disconnected the battery to remove the upper rear seat backrest to access the fuel pump.Is there any danger in reconnecting the battery without plugging the sensor so that I can restart the engine or start and drive the car? I might want to do a farther diagnosis of the fuel pump before and after replacing it. I do assume if I can without any stupid code I can't simply erase with vida, I want to be able to visually leak check the tank before replacing the back seat stuff. I hear these air bag codes can be a monster even with Vida.