Audio, Telephone, RTI (1999-2000): Diagnostics: Notes

Fig 1: The Diagnostic System For The Audio Module, Phone Module And RTI

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic system for the audio module, phone module and RTI continuously diagnoses the function in the system components and stores any diagnostic trouble code (DTCs). The diagnostic trouble codes (DTCs) can then be read off via VIDA. The principles for presentation of information are the same as the cars other on-board diagnostic (OBD) system.

1. Audio module (AUM), phone module (PHM) and RTI have a diagnostic function to check all system components. The diagnostic system is activated automatically but can also be controlled from the VIDA station.
2. It is possible to carry out a diagnostic check on an activated module. The phone module (PHM) always has driving voltage. Audio module (AUM) and RTI have driving voltage when the ignition is in position I.
3. The identity of the system control module, and the installed software can be read off via the VIDA station. With replacement part number, previous service and repairs to the control module can also be read off.