Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description
System Operation
Network Message Charts
Module Network Input Messages Powertrain Control Module (PCM)
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| HVAC A/C request | HVAC control module | This message requests the A/C compressor to be engaged. |
| HVAC evaporative temperature | HVAC control module | This message contains the evaporator temperature. The PCM uses the evaporator temperature to determine the A/C compressor output. |
Module Network Input Messages HVAC control module
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| A/C clutch status | PCM | This message contains the status of the A/C compressor clutch. |
| Ambient air temperature | PCM | This message contains the filtered ambient air temperature information. |
The HVAC control module also includes:
- auxiliary climate controls, refer to Auxiliary Climate Control .
- a rear window defrost button, refer to Glass, Frames and Mechanisms .
- heated/cooled seat controls, refer to Seating .