Sunroof Operation

Fig 1: Identifying Sunroof Communication Links & Components

Courtesy of VOLVO CARS OF NORTH AMERICA.

The sun roof module (SRM) (4/33) communicates with the upper electronic module (UEM) (4/70) using serial communication.

Information about the sun roof position and information to be used for diagnosis is sent from the sun roof module (SRM) to the upper electronic module (UEM). The information about the position is transmitted on to other control modules, such as the climate control module (CCM) (3/112) via the central electronic module (CEM) (4/56).

The communication between the upper electronic module (UEM) and the sun roof module (SRM) mainly consists of diagnostic information.