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. If a fault disappears for any reason after the diagnostic trouble code (DTC) has been permanently stored in the control module, information about the fault remains stored in the control module.

Reading and erasing diagnostic trouble codes (DTCs)
Diagnostic trouble codes (DTCs) stored in the control module can be read off using this function.
Diagnostic trouble codes (DTCs) must be read off at least once before they can be erased.

Reading off input and output signals
This function can be used to continuously read off the status of the control module's input and output signals.
For further information about parameters, see: Description of parameters Description Of Parameters

Reading off the control module identity
VIDA identifies the control modules by reading off a number of codes from the control module memory.
The codes contain the following information about the control module:
- hardware P/N
- software P/N
- diagnostic software P/N.