While rare, it is possible for the BCM itself to fail. The BCM is the "brain" that controls the locks. If the driver chip inside the BCM responsible for the passenger unlock output burns out, the code will be stored even if the wiring and actuator are perfect.
Where will you actually find the Nissan B24BD-14 working? Because of its combination of diesel power and cushion tires, it occupies a specific niche. nissan b24bd-14