Air Flow Strategy For Anti Fogging

This vehicle is equipped with an anti fogging feature known as enhanced windshield anti fogging strategy (EWAFS). This feature is based off the input data that is sent from the in-vehicle temperature and humidity sensor that is mounted near the center top of the windshield typically under the IPMA cover. The in-vehicle temperature and humidity sensor is hard wired to the HVAC module and supplies the vehicles humidity and temperature to the HVAC module. The module uses that data automatically to adjust the airflow in the cabin to prevent the windshield from fogging up. Below are the feature details and climate control operation based on the vehicles climate control system.

Background Strategy Operations
Background Feature Details	Single Zone Manual	Dual Zone/Single Zone Auto
To prevent window fogging, recirculated air cannot be switched on when MAX Defrost is on.	X	X
In certain conditions (i.e. Max Defrost), the A/C compressor may continue to operate even though the A/C button is off.	X	X
In certain conditions, the A/C button may turn on and off automatically based on the temperature setting and/or the current conditions.	X	X
Recirculated air may turn off automatically (or be prevented from turning on) in all airflow modes except MAX A/C to reduce risk of fogging. Recirculated air may also turn on and off automatically in various airflow modes in order to improve heating or cooling efficiency.	X	X
Whenever the blower motor speed is automatically controlled, all of the blower indicators turn off.	-	X
When Auto operation is switched on the air distribution, A/C operation, and outside or recirculated air will also be automatically controlled to heat or cool the vehicle in order to maintain the selected temperature. Under high humidity conditions, automatic operation will also take action to reduce the risk of window fogging by automatically engaging the A/C compressor, increasing blower motor speed, and/or directing more air to the windshield.	-	X