FRM: Footwell module
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All functions of the exterior lights are controlled by the footwell module.
If the driving light is activated, the positioning lights light up. The request transmits the footwell module via a bus signal to the night vision electronics (NVE). The NVE transmits the control signals to the control units for left-hand targeted illumination (GZAL) and right-hand targeted illumination (GZAR). Both of the control units (GZAL and GZAR) turn on the in-series-connected light-emitting diodes of the positioning light in the headlights.
Vehicles with Body Domain Controller (BDC): The functions from the footwell module (FRM) were integrated into the Body Domain Controller (BDC).