Diagnostic Functions

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.
This control module can store up to six diagnostic trouble codes (DTCs), the three first and the three latest.
Should a fault disappear for any reason after being permanently stored in the control module as a diagnostic trouble code (DTC), the information remains stored in the control module.

Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be read off and erased using this function. The on-board diagnostic (OBD) system can identify 44 different faults in the infotainment control module (ICM). These are stored as diagnostic trouble codes (DTCs). This function can also be used to read off whether the fault is still present (permanent) or whether it has now ceased (intermittent) after the diagnostic trouble code (DTC) has been stored. Diagnostic trouble codes (DTCs) can only be erased once all the diagnostic trouble codes (DTCs) have been read off at least once.

Reading off input and output signals
This function can be used to read off the status or value of parameters. The presentation of the status or value can be obtained graphically or digitally. For further information about the different parameters, see Description of parameters Description of Parameters.

Activating components and functions
This function can be used to activate components and functions which affect the infotainment control module (ICM). For further information about activations, see Description of activations Description of Activations.

Reading off static data
This function allows programmed data to be read off or data such as customer parameters to be programmed in.

Reading off the control module identification
VIDA 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 parameters, status identifiers and counters stored at the same time as a diagnostic trouble code (DTC). These are called frozen values.
For further information, see Description of extended diagnostic trouble code (DTC) information Description of Reading off of Extended Diagnostic Trouble Code (DTC) Information.