Automatic Air Conditioning

AIR MIX DOOR MOTOR

Description


SYSTEM DESCRIPTION

Component Parts
- 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 Position Balanced
Resistor (PBR) built-in air mix door motor.







Diagnosis Procedure

Regarding Wiring Diagram information, Coupe or Sedan.
- Discharge air temperature does not change.
- Air mix door motor does not operate.

INSPECTION FLOW


1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE CHANGE (LH)

1.Start engine. Allow engine to reach operating temperature.
2.Press the A/C button to engage the A/C compressor. The A/C on indicator should illuminate.
NOTE:
Confirm that the A/C compressor clutch is engaged (visual inspection).
3.Press (VENT) mode position switch.
4.Turn the temperature control dial (LH) clockwise until 32�C (90�F) is displayed.
5.Check for hot air at (LH) discharge air outlets.
6.Turn the temperature control dial (LH) counterclockwise until 18�C (60�F) is displayed.
7.Check for cold air at (LH) discharge air outlets.
Is the inspection result normal?
YES- GO TO 2
NO- Go to diagnosis procedure for LAN system. Automatic Air Conditioning.

2. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE CHANGE (RH)

1.Turn the temperature control dial (RH) clockwise until 32�C (90�F) is displayed.
2.Check for hot air at (RH) discharge air outlets.
3.Turn the temperature control dial (RH) counterclockwise until 18�C (60�F) is displayed.
4.Check for cold air at (RH) discharge air outlets.
Is the inspection result normal?
YES- Inspection End.
NO- Go to diagnosis procedure for LAN system. Automatic Air Conditioning.