Removal And Installation: General

Fig 1: MOST Bus (Media Oriented System Transportation) Communication Diagram

Courtesy of VOLVO CARS OF NORTH AMERICA.

The components in the infotainment system are part of an optical network, known as the MOST bus. (Media Oriented System Transportation). The network consists of fiber optics (POF = Polymer Optical Fibers), special connectors for fiber optics and MOST nodes, i.e. control modules which are connected to the MOST bus.

Data is transmitted via the fiber optics, for example music, in the form of light signals. The MOST bus is a ring which must be unbroken for it to work. None of the infotainment system will work if an optical fiber breaks or if a connector is disconnected. The ends of the fibers must also be clean to allow the light to pass.

Fig 2: Identifying Minimum Bend Radius For Fiber Optic Cable

Courtesy of VOLVO CARS OF NORTH AMERICA.

A fiber requires a larger bend radius than a copper cable. The bend radius must not be less than 25 mm  . If the fiber bends too much, not enough light will be let through.