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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Steering Column Switches >> Secondary And Configurable Customer Control System >> Diagnostic Information and Procedures >> Radio Control Multi-Function Switch Malfunction >> Circuit/System Description

Circuit/System Description

The radio control multi-function switch interfaces with the info display module which communicates with the radio/HVAC control through a LIN interface. The info display module is responsible for passing information between the radio and the radio/HVAC control.