Turn signal/high beam switch and operating facility for assist systems

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The high-beam assistant is switched on and off at the turn signal/high beam switch. To do this, the light switch must be in the automatic driving lights control or low-beam headlight position. The button in the driver assistance system operating facility is used to switch the lane departure warning on and off.

Fig 1: Identifying High Beam Assistant, On-Board Computer And Lane Departure Warning Button

Courtesy of BMW OF NORTH AMERICA, INC.

Item	Explanation
1	Automatic driving lights control position
2	Low-beam headlight position
3	Turn signal/high beam switch
4	High beam assistant button
5	On-board computer button
6	Lane departure warning button

The operating facility for assist systems is connected via LIN bus to the footwell module (FRM). A bus signal from the FRM to the KAFAS control unit indicates the button has been pressed. The ICM control unit only allows the lane departure warning to be switched on if the system is operating trouble-free. Only then is there positive confirmation by means of a bus signal to the footwell module (FRM) to activate the function indicator light of the button. If there is a fault in the system, the function indicator light remains switched off despite keystroke. This allows the driver to see that the lane departure warning is not available.