Each time you visit that level you will need to expend a power node to open that.
Opening locked doors in dead space.
Dead space 2 wiki guide.
The doors will be unlocked.
If it is locked at first you eventually return and it will be unlocked.
Once all pins have been moved the lock should open.
The non locking side of the door should have a small hole likely on the face of the knob.
Insert the pick above the wrench.
You return to this area later in the game.
Inside is a small button that needs to be pushed to unlock the door.
As previously noted this skill takes a lot of practice to master so have plenty of cheap practice locks on hand if you hope to get good at it.
For dead space on the xbox 360 a gamefaqs q a question titled okay how do you unlock the locked doors lockers and bins.
Same goes for any other door in the game.
Node locked doors are doors that require a power node to open.
Use the leg of the pick to find and push each pin up and out of the tumbler.