Not Manual Mode

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

Unified meter and A/C amp. reads not manual mode signal from A/T device (manual mode switch), and transmits the signals to TCM with CAN communication.
TCM transmits shift position indicator signal to unified meter and A/C amp. with CAN communication.
Unified meter and A/C amp. transmits shift position indicator signal to combination meter with the communication line.
Combination meter indicates A/T shift position when receiving shift position indicator signal.

Fig 1: Identifying Combination Meter And TCM Communication Diagram

Courtesy of NISSAN MOTOR CO., U.S.A.