Steering Wheel Switch - Message Center

The message center switch portion of the Left Hand (LH) steering wheel switch is comprised of 5 buttons. Each button operates a unique switch within the message center switch portion of the Left Hand (LH) steering wheel switch assembly. Each button uses a different resistance value. The Steering Column Control Module (SCCM) sends out a reference voltage to the Left Hand (LH) steering wheel switch on the input circuit and monitors the voltage drop when a message center switch button is pressed. The voltage drop varies depending upon the resistance of the specific button pressed, indicating to the Steering Column Control Module (SCCM) which switch is pressed.