Normal Operation

The dual automatic temperature control (DATC) module 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 DATC module. The DATC module shares the MS-CAN network with the instrument cluster, smart junction box (SJB), audio control module (ACM), satellite digital audio receiver system (SDARS) module, front controls interface module (FCIM) and front display interface module (FDIM). Voltage to the DATC module is provided by circuits (W/R) and (W). Ground is provided by circuit (B/L).