Module Network Input Messages FCIM
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
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. |
A/C clutch status | PCM | This message contains the status of the A/C compressor clutch. |
Module Network Input Messages PCM
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
HVAC A/C request | FCIM | This message requests the A/C compressor to be engaged. |
Evaporator temperature | FCIM | This message contains the evaporator temperature. The PCM uses the evaporator temperature to determine the A/C compressor output. |
The Refrigerant Cycle
For information regarding base refrigerant operation within the HVAC system, refer to the current Ford Web Based Technical Training courses. The diagram below shows the refrigerant system state in each component on this vehicle.
The following statements apply to this refrigerant system:
The PCM controls the A/C clutch relay. The evaporator temperature sensor monitors the temperature of the air that has passed through the evaporator core and sends a signal to the PCM. If the temperature of the evaporator core discharge air is low enough to cause the condensed water vapor to freeze, the A/C clutch is disengaged by the PCM. The line pressure is monitored so that A/C compressor operation is interrupted if the system pressure becomes too high or too low. The A/C compressor relief valve opens and vents refrigerant to relieve unusually high system pressure.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.