Volvo Workshop Manuals
XC90 AWD L6-3.2L VIN 98 B6324S (2007)
Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Communications Control Module > Component Information > Description and Operation > Audio Module (AUD) > Page 144
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 parameters
This function is used to read the status or value of parameters. The status or value can be presented digitally.
Reading off the control module identification
The diagnostic tool 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)
diagnostic software P/N
Reading off extended diagnostic trouble code (DTC) information
This function can be used to read parameters, status identifiers and counters stored at the same time as a diagnostic trouble code (DTC). These are called
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