WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wiring Diagram - COMM - AV Control Unit (1 Of 4)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Wiring Diagram - COMM - AV Control Unit (2 Of 4)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Wiring Diagram - COMM - AV Control Unit (3 Of 4)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 4: Wiring Diagram - COMM - AV Control Unit (4 Of 4)