Mode Door Motor Circuit
Mode Door Motor CircuitSYMPTOM:
- Air outlet does not change.
- Mode door motor does not operate normally.
Inspection Flow:
INSPECTION FLOW
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
- Display and A/C auto amp.
- Mode door motor (LCU)
- A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)
- In-vehicle sensor
- Ambient sensor
- Sunload sensor
- Intake sensor
System Operation
The display and A/C auto amp. receives data from each of the sensors. The display and A/C auto amp. sends air mix door, mode door and intake door opening angle data to the air mix door motor 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 display and 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 FRESH/RECIRCULATION operation is selected. The new selection data is returned to the display and A/C auto amp.
Mode Door Control Specification
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit. It rotates so that air is discharged from the outlet set by the display and A/C auto amp. Motor rotation is conveyed to a link which activates the mode door.
DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnosis procedure. Refer to ATC-65, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT". LAN System Circuit