Software Downloading
Software downloads normally take place during manufacture of the car. However they are also required when replacing control modules.
When ordering software, the hardware and the software in the car is compared to the information in the Volvo central database. If the comparison is OK the software is downloaded to the control module.
If the comparison between the car and Volvo central database is not OK, the database is updated with the car configuration. When this is complete the software is downloaded.
If the power to the electrical power steering module (EPS) is cut, no new software download is required, as long as the software was previously loaded correctly into the control module.