With 7 Inch Display

MODE DOOR CONTROL SYSTEM


System Description

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 the air mix door, the mode door, the upper ventilator door and the intake door opening angle data to the air mix door motor LCU(s), the mode door motor LCU, the upper ventilator door motor LCU and the intake door motor LCU.
- The air mix door motor(s), the mode door motor, the upper ventilator door motor and the 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.
- Next, HOT/COLD, DEF/VENT, OPEN/SHUT or FRE/REC operations is selected. The newly selected data is returned to the A/C auto amp.

Door Motor Circuit






Mode Door Control Specification





Mode position can be selected manually by pressing the MODE switch or the DEF switch on the A/C control. This enables to fix a mode position. Pressing the AUTO switch allows automatic control by the A/C auto amp. During the automatic control of a mode position, a mode door position (VENT, B/L, FOOT, or D/F) is selected based on a target the air mix door opening angle and sunload depending on the temperature calculated by the A/C auto amp. In addition, the D/F is selected to prevent windshield fogging only when ambient temperature is extremely low with mode position the FOOT.