"Passage Attacks: This symbol indicates that a creature may move through the wall to enter the zone on the other side, but the creature automatically suffers an attack from the wall. This attack occurs before the creature completes its movement action, so if the creature is Restrained or Incapacitated during the attack, it must remain in its original zone. This is a special kind of attack that is neither melee nor ranged, cannot be avoided, and does not trigger any damage barrier or Counterstrike attacks (see “Attacks” on page 22). If the wall does not have either the Passage Attacks or Passage Blocked symbols, creatures may move through the wall freely."
This trait does not make the movement through the wall a full action.
"Climbing: Creature may take a special full action to climb over any Corporeal wall and move into the adjacent zone. If the wall has the Passage Attacks trait, it attacks the creature before it moves."
In both cases you are always attacked before you move. (minor difference, but important)