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)
If the control module detects a fault, a diagnostic trouble code is generated. The control module can store up to 10 trouble codes. A fault that is detected during the most recent operating 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 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 frozen values.
For more information, see Vehicle communication information in Specifications, other.

Reading off the parameter values
Using this function the status or value of parameters can be read out. The status/value is presented digitally.
For more information on the different parameters, see Vehicle communication information under Specifications, other.

Activating components and functions
This function can be used to activate components and functions that affect the outputs on the central electronic module (CEM).
For more information, see Vehicle communication information in Specifications, other.

Reading off and programming data
This function makes it possible to read out programmed data and program in data, such as customer parameters.

Note! If possible, all data must be read out from the control module before replacement. After replacement the relevant data must be programmed into the new control module. The data must be read off before the control module is replaced. This is so that the same information can be programmed in to the new control module.

Programming remote keys
Add or Remove remote keys
This function makes it possible to add a new remote key that has been ordered or to remove a non-operational or lost remote key.