WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Can Communication M/T Models System Diagram
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Input/output signal chart M/T Models (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Input/output signal chart M/T Models (2 Of 2)