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Network Message Chart

Module Network Input Messages - Powertrain Control Module (PCM) 

Broadcast Message Originating Module Message Purpose
A/C request IPC This message requests the A/C compressor to be engaged.
Evaporator temperature IPC This message contains the evaporator temperature. The PCM uses the evaporator temperature to cycle the A/C compressor clutch.
Ambient air temperature IPC This message contains raw value from the Ambient Air Temperature (AAT) sensor.
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