XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
A DVD player is integrated in the multimedia module (MMM). The DVD player is used for navigation. The control module has various user functions
the start menu
The start menu displays all the functions available to the user on the screen.
The navigation function in the multimedia module (MMM) calculates the position of the car using the signals from the GPS antenna. The GPS antenna is
integrated in the antenna module (ATM).
The multimedia module (MMM) also has a built-in three dimensional piezo-electrical gyro. This supplies information about the movements of the car,
such as any turns taken.
Information used from other nodes for navigation:
the wheel rotation counter from the brake control module (BCM)
back-up gear position from the transmission control module (TCM) and central electronic module (CEM)
speed signal from the central electronic module (CEM).
Information from these control modules is transmitted to the infotainment control module (ICM) which then sends the information onwards to the
multimedia module (MMM).
The map displayed on the screen indicates the position of the car. This position is adjusted using information from:
the wheel rotation counter
the speed signal