Steering Mounted Controls Assembly: Description and Operation

Multifunction Steering Wheel

Description

Buttons are integrated in the steering wheel for easier operation of the radio, cellular telephone, navigation and CD changer.

With Tiptronic (automatic transmission), additional switches are installed.

The electronics integrated in the multi-function buttons take over signal processing from the Tiptronic buttons/switches and transfer signals via the LIN data bus (single wire bus) to the steering column electronic systems control module. The conversion to CAN BUS (comfort) takes place there.

The individual button blocks and the Tiptronic switch can be replaced separately.

Fault finding is performed via Guided Fault Finding.