Network Message Charts

Module Network Input Messages - PCM

Broadcast Message	Originating Module	Message Purpose
A/C request	HVAC Control Module	This message requests the A/C compressor clutch to be engaged.
Evaporator temperature	BCM	This message contains the evaporator temperature. The PCM uses the evaporator temperature to cycle the A/C compressor clutch.

Module Network Input Messages - HVAC Control Module (DATC without SYNC ® System)

Broadcast Message	Originating Module	Message Purpose
A/C clutch status	PCM	This message contains the A/C compressor clutch status.
Ambient air temperature	PCM	This message contains raw value from the ambient air temperature sensor.
Evaporator temperature	BCM	This message contains the evaporator temperature. The PCM uses the evaporator temperature to cycle the A/C compressor clutch.

Module Network Input Messages - APIM (DATC with SYNC ® System)

Broadcast Message	Originating Module	Message Purpose
Climate control status	HVAC Control Module	This message contains the HVAC mode status for the mode indicators.

Module Network Input Messages - HVAC Control Module (DATC without SYNC ® System)

Broadcast Message	Originating Module	Message Purpose
A/C clutch status	PCM	This message contains the A/C compressor clutch status.
Ambient air temperature	PCM	This message contains raw value from the ambient air temperature sensor.
Climate control requests	APIM	This message contains both the climate control system voice commands as well as all climate control system touch screen inputs.
Evaporator temperature	BCM	This message contains the evaporator temperature. The PCM uses the evaporator temperature to cycle the A/C compressor clutch.