1. Using a small screwdriver, carefully pry the switch out of the front of the selector lever handle (see accompanying illustration).
2. Loosen the screw and remove the switch from the lever handle.
3. Check the proper functioning of the switch:
- In the OFF position, conductivity must exist between the switch terminals
- In the ON position there should be no conductivity.
4. Replace the switch if necessary.
5. Installation is carried out in reverse order.
[The text was borrowed from here nissanbook.ru]