General Information - MULTIFUNCTION Steering Wheel
Buttons are integrated in the steering wheel for easier operation of the Infotainment system, telephone, navigation, cruise control system and vehicle menus. On vehicles with Tiptronic, rocker switches are also installed on the left and right.
The Multifunction Steering Wheel Control Module -J453- (Left Multifunction Buttons on Steering Wheel -E440-) reads out the button information and transfers it over the LIN bus to the Steering Column Electronics Control Module -J527-. From the Steering Column Electronics Control Module -J527-, the information is transferred to the individual components via the CAN bus (comfort) and the Data Bus On Board Diagnostic Interface -J533-.
Fault Finding is performed using the Guided Fault Finding on the Vehicle Diagnostic Tester.