Steering Wheel Structure: Notes

Fig 1: Identifying Steering Wheel Important Components F01/F02

Courtesy of BMW OF NORTH AMERICA, INC.

COMPONENTS DESCRIPTION CHART

Index	Explanation
1	Steering wheel heating
2	Button block for cruise control
3	Airbag unit
4	Vibration actuator for lane departure warning
5	Steering wheel electronics system
6	Button block for telephone/radio

The button blocks as well as the steering wheel electronics are linked across the LIN bus to the electronics in the steering column switch cluster.

With the corresponding request, the steering wheel electronics control and monitor the function of the vibration actuator and steering wheel heating.

The priming caps of the airbags are connected directly and are activated by the Crash Safety Module, ACSM.

The fanfare-horn button is evaluated by the electronics of the steering column switch cluster.