Mode Door Control
The servo motor for driving the mode door is installed on the side facing the driver's seat of the heater unit. Operating the mode selector switch sends a signal to the servo motor. In response to the signal, the motor makes a clockwise or counterclockwise rotation to drive the mode door through a link.
When DEF position (1) or DEF/HEAT position (2) is selected, the air conditioner switch automatically turns ON and the recirculation turns OFF.