System Overview

System overview

Control module





The integrated audio module (IAM) handles functions for:
- Radio reception (AM and FM)
- CD playback
- AUX playback
- RDS reception
- USB/iPod playback
The integrated audio module (IAM) communicates with directly connected components as well as with other control modules and components via the MOST network, which is a fiber-optic communication network.
The integrated audio module (IAM) is a slave module on the MOST network. The infotainment control module (ICM) is the master module.
The integrated audio module (IAM) is mounted in the center console. It is integrated with the audio unit and they are replaced together.
In order to function in the MOST network, the infotainment control module (ICM) checks that the integrated audio module (IAM) has a correct serial number. If the number is incorrect, the integrated audio module (IAM) does not work.

The following versions of Integrated Audio Module (IAM) are available:
- Integrated amplifier (Performance), with built-in radio, CD player and internal amplifier.
- Without integrated amplifier, with built-in radio and CD player. The version requires an external amplifier, Audio module (AUD).
- Without integrated amplifier, with built-in radio and CD changer for 6 discs. Version requires an external amplifier, Audio module (AUD).
RDS reception (Radio Data System) is possible with FM broadcasts (market-dependent). The system is called RBDS (Radio Broadcast Data System) in USA.
For the XC60 and S80/V70/XC70 from structure week 200846, there are versions with support for the reception of digital HD radio (does not apply to Performance). This only applies to the USA market.
The Integrated Audio Module (IAM) manages the playback of compressed music formats from CDs (does not apply to Performance). Support available for the following formats:
- mp3
- wma
The integrated audio module (IAM) can play music via the AUX input.
For the XC60 and S80/V70/XC70 from structure week 200846, there is support for music playback via a USB/iPod connection in the tunnel console (does not apply to Performance). There is support for the following formats:
- mp3
- wav
- wma
The loudspeakers that are mounted in the front and rear doors are connected to the Integrated Audio Module (IAM) or an external amplifier, Audio module (AUD), (does not apply to Performance).
For more information about loudspeakers for versions without an integrated amplifier, see Design and Function, Audio module (AUD).
The integrated audio module (IAM) checks executed activations and input/output signals via its integrated diagnostics. If the control module detects a fault, a diagnostic trouble code is generated. Any diagnostic trouble codes are stored in the control module memory. The information can be read via the data link connector in the vehicle.

Signals
The table below summarizes the input signals to and output signals from the integrated audio module (IAM). Signal type is divided into directly connected signals and MOST communication. The illustration below depicts the same information plus Volvo's component designation.