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 unless otherwise stated)
Microphone (16/98) analog signals.	Loudspeaker left front (16/4, 16/55) Loudspeaker right front (16/3, 16/56) Loudspeaker left rear (16/6, 16/136) Loudspeaker right rear (16/5, 16/137) Center loudspeaker (16/26) (option).
Via MOST communication: (ring network)	Via MOST communication: (ring network)
Infotainment control module (ICM) (16/1) main control module AM/FM tuner module (AFM) (16/94) (discontinued structure week 2004w46, replaced by Integrated Audio Module (IAM) thereafter) Media Player Module (MPM) (16/107) (discontinued 2004w46, replaced by Integrated Audio Module (IAM) thereafter) Phone module (PHM) (16/60) Multimedia module (MMM) (16/108). Integrated Audio Module (IAM) (16/1) (High performance and premium sound)	Infotainment control module (ICM) (16/1) main control module Subwoofer module (SUB) (16/79) Phone module (PHM) (16/60) Multimedia module (MMM) (16/108).

Fig 1: Identifying Audio Module (AUD) Communications

Courtesy of VOLVO CARS CORPORATION