Air Mix Door Motor

CONTROL SYSTEM OUTPUT COMPONENTS

Air Mix Door Control (Automatic Temperature Control)

Component Parts
Air mix door control system components are:
1. EATC unit
2. Air mix door motor
3. PBR
4. In-vehicle temperature sensor
5. Ambient temperature sensor
6. Sunload sensor




System Operation
Temperature set by temperature control switch is compensated through setting temperature correction circuit to determine target temperature.

EATC unit will operate air mix door motor to set air conditioning system in WARM or COOL position, depending upon relationship between conditions (target temperature, sunload, in-vehicle temperature and ambient temperature) and conditions (air mix door position and compressor operation).

Air Mix Door Control Specification:

Air Mix Door Motor
The air mix door motor is attached to the bottom of the heater unit. It rotates so that the air mix door is opened to a position set by the EATC unit. Motor rotation is then conveyed through a rod and air mix door position is then fed back to the EATC unit by PBR built-in air mix door motor.




PBR Characteristics
Measure resistance between terminals 3 and 4 at vehicle harness side.