Normal Operation and Fault Conditions

When the A/C  is requested, the FCIM sends the button press message over the I-CAN  to the IPC. The IPC then sends the button press message to BCM over the HS-CAN  . The BCM then sends the button press message to the HVAC module over the MS-CAN  . Lastly the HVAC module sends an A/C  request message through the MS-CAN  to the BCM and the BCM sends the A/C  request through the HS-CAN  to the PCM.

REFER to Control System Logic 

REFER to Controls and Compressor Cycling