If the closed door is not flush with the body surface, use a special tool to adjust its position after loosening the bolts securing the door hinges to the body.
If it is difficult to open and close the door, adjust the position of the lock and latch by adjusting the latch.
Window lifter safety mechanism - check
Lower the door glass 50 mm from the fully closed position.
Place a wooden board about 4mm or less thick as shown in the picture and lift the glass.
Check that when the board is clamped, the glass automatically drops by approximately 50 mm.
[The article is reprinted from this source: MitsubishiMan]
Lower the glass again 50 mm or more from the fully closed position and repeat the test. Make sure that this time the glass lowers approximately 150 mm.
Replace the window regulator assembly if the door glass does not move the specified distances.
When installing a new window regulator, for all doors, after the door windows are completely closed, hold the window control switch in the "UP" position for 1 second or longer.