V50 T5 AWD L5-2.5L Turbo VIN 67 B5254T7 (2008)
Auxiliary Input / Output Jack: Initial Inspection and Diagnostic Overview
Accessory USB Unit (AUU)
Diagnostic Functions
General
The control module has a built-in diagnostic system, Volvo Diagnostic, which continuously monitors internal functions as well as input and output
signals.
Diagnostic trouble codes (DTCs)
A diagnostic trouble code (DTC) is stored if the control module detects a fault. There are two diagnostic trouble codes (DTCs) for the Accessory USB
unit (AUU). A fault that was detected during the last driving cycle is defined as permanent. Other faults that are detected are defined as intermittent.
Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be read off and erased using this function. Diagnostic trouble codes (DTCs) can only be erased once all the
diagnostic trouble codes (DTCs) have been read off at least once.
Reading off the control module identification
The diagnostic tool identifies control modules by reading off a number of codes from the control module memory. The codes contain information about
the control module:
-
hardware P/N (control module without software)
-
hardware serial number (control module without software)
-
software P/N
-
diagnostic software P/N.
Reading off extended fault-tracing information
This function can be used to read out parameters, identify status and counts stored at the same time as a diagnostic trouble code (known as frozen
values).
