Normal Operation

The audio control module (ACM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits (GY/O) (MS-CAN +) and (V/O) (MS-CAN -) provide the network connection to the ACM. The ACM shares the MS-CAN with the instrument cluster (IC), HVAC module, smart junction box (SJB), satellite digital audio receiver system (SDARS) module, front controls interface module (FCIM) and front display interface module (FDIM). Voltage for the ACM is provided by circuit (W/R). Ground is provided by circuit (B/GY).