Using a converter from OBD1 to OBD2 doesn't work unfortunately, it can't read the protocols
If all you're trying to do is get basic codes off it, you can short out 2 pins on the OBD1 port which will show fault codes by flashing the check engine light a certain amount of times. But if you're trying to do something more complicated like get a live read of emissions or other signal data then you'd need a nissan-dealer specific tool.