Q5 Quattro V6-3.2L (CALB) (2009)
Steering Mounted Controls Communication Module: Description and Operation
Multifunction Steering Wheel Control Module
Buttons are integrated in the steering wheel for easier operation of Infotainment, telephone and the navigation system. On vehicles with Tiptronic,
rocker switches are also installed on the left and right.
The multifunction steering wheel control module (under right button) reads the button information and transmits it to the steering column electronic
systems control module via the LIN bus (single wire bus). From the steering column electronic systems control module, the information is transferred
to the individual components via the CAN bus and the data bus on board diagnostic interface.
Fault finding is performed via "Guided Fault Finding".