Once all pins have been moved the lock should open.
Opening locked doors in dead space.
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.
If it is locked at first you eventually return and it will be unlocked.
Same goes for any other door in the game.
Node locked doors are doors that require a power node to open.
For dead space on the xbox 360 a gamefaqs q a question titled okay how do you unlock the locked doors lockers and bins.
Insert the pick above the wrench.
The doors will be unlocked.
Use the leg of the pick to find and push each pin up and out of the tumbler.
You simply need a straight stiff.
Each time you visit that level you will need to expend a power node to open that.
You return to this area later in the game.
Inside is a small button that needs to be pushed to unlock the door.
Dead space 2 wiki guide.