Overview Of Signal Paths For Adaptive Headlights On E60, E61, E64: Notes
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The signal paths between the individual control units can be seen on the following illustration:
The safety and gateway module (SGM) is the data interface between the data buses K-CAN, PT-CAN and byteflight. On the 5-Series, the signal paths from the light module to the adaptive headlights always lead through the safety and gateway module (SGM).