Pretty much the title of the thread. When does this ability come online? Level 1 or 2? Because I'm inclined to believe that it's at level 2, as it replaces the 2nd level bonus feat, but I'm continually doubting myself on this.
Improvisational Training:
Improvisation Training (Ex): A hinyasi is skilled at fighting with improvised weapons. She deals damage equal to her unarmed strike damage while fighting with an improvised weapon. A hinyasi treats improvised weapons as weapons from the close fighter weapon group.
This replaces the bonus combat feat gained at 2nd level.
Technically, if it doesn't say, it's a first level ability.
AwesomenessDog is correct. Just because it replaces something normally gained at 2md level doesn't mean the new feature is gained at 2nd level. Sometimes the new ability changes the balance, or is ontegral for the archetype to function, so the level of the new feature is adjusted.