Description And Operation: Operation

The six switches in the two remote radio switch units are normally open, resistor multiplexed momentary switches that are hardwired to the left steering wheel switch, which uses a Local Interface Network (LIN) bus to communicate the data to the Steering Column Control Module (SCCM), which then relays the data to the Body Control Module (BCM) through a LIN bus in the steering wheel wire harness. The BCM reads the remote radio switch inputs then sends the appropriate electronic messages to the radio over the Controller Area Network - Interior High Speed (CAN-IHS) data bus to invoke the requested command.