A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
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Steering Mounted Controls Assembly: Description and Operation
Multifunction Steering Wheel
=> [ Multifunction Steering Wheel ]
=> [ Multifunction Buttons ]
=> [ Steering Column Control Module ]
Multifunction Steering Wheel
CAUTION!
‹› Disconnect battery ground wire before working on electrical system.
‹› On vehicles with Telematics, activate Telephone/Telematics Control Module service mode before disconnecting Battery (A). Refer to
=> [ Telematics Service Mode, Activating/Deactivating ] See: Cellular Phone/Testing and Inspection.
If the battery is reconnected, follow the procedure for disconnecting and connecting the battery. Deactivate Telephone/Telematics Control Module (
J526) service mode. Refer to => [ Telematics Service Mode, Activating/Deactivating ] See: Cellular Phone/Testing and Inspection.
Six function buttons are integrated in the steering wheel to facilitate radio and telephone operation when driving. In addition, multifunction steering
wheel is heated electrically.
The electronics installed in the steering wheel converts button signals to the LIN data bus (single wire bus) and dims function buttons. On vehicles
with automatic transmission, 2 additional switches can be installed for Tiptronic. The electronics in the steering wheel cannot be replaced individually.
In case of faulty electronics, the entire steering wheel must be replaced.
The multifunction steering wheel is part of the complete "Steering column switch module" (SMLS) system and delivers data via the LIN data bus to
the Steering Column Electronic Systems Control Module.
Fault finding is performed. Refer to Guided Fault Finding Vehicle diagnosis, testing and information system VAS 5051.
Repair to CAN bus lines. Refer to => See: Powertrain Management/Computers and Control Systems/Information Bus/Service and Repair
Multifunction Buttons
Two versions of the multifunction steering wheel are used.
Multifunction steering wheel with two blocks of buttons
Removing and installing multifunction buttons, Refer to => [ Multifunction Steering Wheel ] See: Service and Repair/Multifunction Steering Wheel.
Multifunction steering wheel with roller buttons
