Air Mix Door Motor
AIR MIX DOOR MOTORDescription
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
- Front air control
- Air mix door motors (LCU)
- In-vehicle sensor
- Ambient sensor
- Sunload sensor
- Intake sensor
System Operation
The front air control receives data from each of the sensors. The front air control sends air mix door, mode door and intake door motor opening angle data to the air mix door motors LCU, mode door motor LCU and intake door motor LCU.
The air mix door motor, mode door motor and intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the front air control and each of the motor position sensors are compared by the LCUs in each motor with the existing decision and opening angles. Subsequently,HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new selection data is returned to the front air control.
Air Mix Door Control Specification
COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motors LH (1) RH (2) are attached to the heater & cooling unit assembly. They rotates so that the air mix door is opened or closed to a position set by the front air control. Motor rotation is then conveyed through a shaft and the air mix door position feedback is then sent to the front air control by PBR built-in air mix door motor.
Diagnosis Procedure
SYMPTOM:
- Discharge air temperature does not change.
- Air mix door motor does not operate.
INSPECTION FLOW
Step 1-4:
Step 4 (Continued)-12:
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR
SYMPTOM: Discharge air temperature does not change.
Perform diagnosis procedure. Refer to HAC-29, "Diagnosis Procedure". LAN System Circuit