Mode Switch (3-Zone)

The single, rotary Mode Switch has 13 detents to either direct airflow to the panel outlets, a mix of floor and panel outlets, floor outlets, a mix of floor and defrost outlets, or defrost outlets. When the Rear A/C-Heater Unit is activated, the Mode Switch also controls its Mode Door to direct the rear airflow to the floor or overheard outlets. Rotating the switch results in the A/C-Heater Control Module signaling the actuator to move the mode door(s). All door positions are determined relative to the number of commutator pulses required to provide full travel of the door. On command, the A/C-Heater Control Module runs the actuator for the number of pulses corresponding to the desired door position.