The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature and amount of sunload. SYSTEM OPERATION

- The A/C auto amp. receives data from each of the sensors.
- The A/C auto amp. sends air mix door, mode door and intake door opening angle data to the air mix door motor LCUs, mode door motor LCU and intake door motor LCU.
- The air mix door motors, mode door motor and intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the A/C auto amp. and each of the motor position sensors are compared by the LCUs in each door motor with the existing decision and opening angles.
- Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data are returned to the A/C auto amp.

Door Motor Circuit
MODE DOOR CONTROL SPECIFICATION

- The air outlet can be selected manually by pressing the MODE switch or the DEF switch of preset switch. The air outlet can be fixed.
- The automatic control by A/C auto amp. is available by pressing the AUTO switch.
- Select the mode door position (VENT, B/L, FOOT, D/F) according to the air flow temperature calculated by the A/C auto amp. based on the target air mix door position and sunload amount at the air outlet automatic control.