B Terminal Circuit: Description
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
For vehicles equipped with V6 engine (VQ40DE), terminal "2" (B) is constantly supplied with battery power. For vehicles equipped with V8 engine (VK56DE), terminal "1" (B) is constantly supplied with battery power.