Not Manual Mode

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Communication Diagram - A/T Position Indicator
Courtesy of NISSAN MOTOR CO., U.S.A.