WARNING: This page is about a different car, the 2002 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: CAN System - Check Sheet Results (Example) (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: CAN System - Check Sheet Results (Example) (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE:
If "NG" is displayed on "CAN COMM" for the diagnosed control unit, replace the control unit.