Central Electronic Module (CEM)

Downloading software and replacing the control module

New software can be downloaded to the central electronic module (CEM). When software is ordered, the vehicle's software and hardware is compared to the Volvo central database. If the comparison matches, the software is downloaded to the control module. The PIN codes for the existing remote keys are downloaded at the same time.
If the comparison between the car and Volvo's central database does not correspond, then the database is updated with the vehicle's configuration. When this is complete the software is downloaded.
The PIN codes are downloaded automatically in the order procedure available in VIDA. The PIN codes are retrieved from the Volvo central database and are sent in the software package when software is ordered for the new control module.
The central electronic module (CEM) is located under the glove compartment on the passenger side. The entire control module is removed from the vehicle during replacement.
Due to the unique PIN codes, it is not possible to switch the central electronic module (CEM) from one vehicle to another.
On vehicles with Bi-Xenon lamps, the position sensors for headlamp range adjustment must be calibrated upon replacement of the central electronic module (CEM). This is done in VIDA via vehicle communication.
For information on lock and alarm functions, see Design and Function, Central locking system and Design and Function, Alarm.