System Overview: Signals

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The table below summarizes the input signals to and output signals from the audio module (AUD). The signal types are divided into directly connected signals and MOST communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected:
Power supply Ground Microphone (16/77) Headset panel (control signal) (16/111, 16/112)	Loudspeaker left front (16/4, 16/55) Loudspeaker right front (16/3, 16/56) Loudspeaker left rear (16/6) Loudspeaker right rear (16/5) Center loudspeaker (16/26) (option). Loudspeaker left D-post (16/57) Loudspeaker right D-post (16/58) Headset panel (16/111, 16/112) Microphone (16/77) (phantom feed)
Via MOST communication: (ring network)	Via MOST communication: (ring network)
Infotainment control module (ICM) (16/94), main control module Integrated audio module (IAM) (16/1) Phone module (PHM) (16/60) Multimedia module (MMM) (16/108)	Infotainment control module (ICM) (16/94), main control module Multimedia module (MMM) (16/108) Subwoofer module (SUB) (16/79) Phone module (PHM) (16/60)

Fig 1: Identifying Volvo Component Designations

Courtesy of VOLVO CARS CORPORATION