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 A/T Models System Diagram
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Can Communication A/T Models Input/Output Signal Chart (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Can Communication A/T Models Input/output Signal Chart (2 Of 2)