(2) Air Vent Mode Control System & RECIRC./FRESH Control System Outside Air RECIRC./FRESH Control Damper Inside Air Inside Air Air Mix Control Damper Heater Core Defroster Side Defroster Blower Motor Def. Damper Cool Air By-Pass Control Damper Cool Air By-Pass Duct Air Flow Control Damper Heat Damper Heater Rear Heater Side Ventilator Center Ventilator Side Ventilator Lower Ventilator AC1378 (a) Air Vent Mode Control System Air flow changes as follows. ① Air mix control servo motor shaft moves. ② Program switch is changed. (Signal is transmitted to relay box) ③ Relay box rotates a motor in air vent mode control servo motor. ④ Servo motor links move. ⑤ Each damper moves. ⑥ As aforeide, the air flows as shown left illustration. VENT BI-LEVEL HEAT DEF ☆ Cool Air ➤ Warm Air Link AC1349