DTC B15D0: MOST Communication Malfunction [12/2019 - 10/2022]: Description

Navigation system components communicate with each other via MOST communication.

If a line short or short to ground occurs in a MOST communication line, communication will not be possible and the navigation system will not operate normally.

After the ignition switch is turned to ACC, if the MOST communication network cannot be established and MOST communication is determined to not be possible, this DTC will be stored.

HINT: 

Electrical noise may cause communication malfunctions between devices in the MOST network.