Volvo Workshop Manuals
XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Communications Control Module > Component Information > Description and Operation > Audio Module (AUD) > Page 187
The navigation function displays the location of the car and directions to the entered destination.
information about the wheel rotation counter is transmitted from the brake control module (BCM) (4/16)
information about the back-up gear position is transmitted from the transmission control module (TCM) (4/28).
The central electronic module (CEM) transmits both signals to the infotainment control module (ICM) (16/1) via the low speed side of the Controller
The control module has a built-in diagnostic system, Volvo Diagnostic, which continuously monitors internal functions as well as input and output
Diagnostic trouble codes (DTCs)
A diagnostic trouble code (DTC) is stored if the control module detects a fault. A fault which is detected in the most recent operating cycle is defined as
Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be read off and erased using this function.
Note! Certain functions are unavailable until the diagnostic trouble codes (DTCs) have been erased.
Reading off the control module identification
VIDA identifies control modules by reading off a number of codes from the control module memory.
hardware P/N (control module without software)
hardware serial number (control module without software)
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