Airflow Mode Door Position

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

The climate control system uses 2 electric airflow mode door actuators to control the airflow mode doors.

The panel/defrost airflow mode door actuator uses a cam and lever assembly to position the panel and defrost airflow mode doors on command from the HVAC module. The panel/defrost mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the panel and defrost airflow mode doors. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the airflow mode doors. The HVAC module powers the actuator motor to move the airflow mode doors to the desired position. The desired position is set by the vehicle occupants using the mode selector buttons.

The floor airflow mode door actuator positions the floor mode door on command from the HVAC module. The floor mode door actuator is driven to, and will automatically stop at, the full open or full closed position and does not require a feedback circuit to report its position to the HVAC module. The desired position is set by the vehicle occupants using the mode selector buttons.