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. There are approximately 18 diagnostic trouble codes (DTCs) for standard carphones, approximately 25 for carphones with Volvo On Call/Volvo On Call Plus (USA). A fault which is detected in the most recent operating cycle is defined as permanent. Other faults which 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.

Reading off the parameter values
Using this function, the status or value of parameters can be read off. The status/value is presented digitally.

Activating/deactivating Volvo On Call Plus (USA only)
Under this title there is information about what to do when a customer wants to the change the status of their subscription for Volvo On Call Plus.

Service check for Volvo On Call/Volvo On Call Plus
This test can be used to check the status of the reserve battery for Volvo On Call/Volvo On Call Plus.

Resetting the reserve battery
This service is used when the reserve battery has been replaced to reset the value to 100%. If the reserve battery has been replaced in a phone module (PHM) with Volvo On Call/Volvo On Call Plus functionality, the algorithm of the battery must be reset.

Resetting the carphone code
This function is used to reset the carphone code to the original code when it has been changed.