S80 L6-2.9L VIN 92 B6294S2 (2004)
Viscous Coupling: Testing and Inspection
Downloading software and replacing the control module
New software for the differential electronic module (DEM) can be downloaded. When ordering software, the hardware and the software in the car are
compared to the data 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.
The control module is integrated in the coupling unit for the active on demand coupling (AOC). If the control module is replaced, the control valve/axial
solenoid and oil pressure and temperature sensor must also be replaced.
