System Overview

System overview

Control module




The multimedia module (MMM) is an option and has the primary task of the managing the functions for:
- navigation
- Traffic message channel (TMC)
- FM multiplex (Japan only)
- display screen
- DVD player.
Only the display screen is directly connected to the multimedia module (MMM). The DVD player is integrated in the multimedia module (MMM). The functions from other control modules are via the MOST network, but are managed using the multimedia module (MMM). The system is not compatible with music or film CD or DVDs.
The multimedia Module (MMM) uses the MOST network to communicate with other control modules.
The control module checks activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored if the control module detects a fault. Any diagnostic trouble codes (DTCs) are stored in the control module memory. This information can be read off using VIDA via the data link connector (DLC) in the vehicle.
In order to work correctly on the MOST network, the infotainment control module (ICM) checks that the serial number in the multimedia module (MMM) is correct. The multimedia module (MMM) will not function if the serial number is incorrect. Try switching the ignition off and on if there are problems when replacing the multimedia module (MMM).
A simple way to ensure that the multimedia module (MMM) is powered is to insert and then remove a DVD. If this does not work, check that the control module is powered and grounded.
The multimedia module (MMM) is located in the glove compartment.
For further information, also see Signal specifications.

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