12.1. Overview

The interior lighting of the F10 is controlled by the footwell module FRM control unit.

The footwell module is the central control unit for the interior lighting. All interior lighting outputs of the footwell module are pulse-modulated. This ensures that the interior light functions at a constant brightness level in the event of voltage fluctuations. The pulse width modulation is also used for the "soft ON/soft OFF" function.

The components for the interior light in the front roof area are integrated in the roof function center and in the sun visors. The footwell lighting is located underneath the dashboard. The rear reading and interior lights are supplied with voltage via the roof function center.

Fig 1: Overview Of F10 Roof Function Center

Courtesy of BMW OF NORTH AMERICA, INC.