System Overview: Signals

The table below summarizes the input signals to and output signals from the accessory USB unit (AUU). The signal types are divided into directly connected signals, serial communication and MOST communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected:
External USB device (for example mp3 player and iPod devices)	External USB device (for example mp3 player and iPod devices)
Via MOST communication:	Via MOST communication:
Infotainment control module (ICM) (3/281)	Infotainment control module (ICM) (3/281)

Fig 1: Identifying AUU & Components

Courtesy of VOLVO CARS CORPORATION