Automatic Air Conditioning

INTAKE DOOR MOTOR

System Description


SYSTEM DESCRIPTION

- Intake door motor does not operate normally.
- Intake door does not change.

SYSTEM DESCRIPTION

Component Parts
- A/C auto amp.
- A/C and AV switch assembly
- Intake door motor (PRB built into the intake door motor)
- In-vehicle sensor
- Ambient sensor
- Optical sensor
- Intake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the opposite direction, again allowing fresh air into the cabin.
In the AUTO mode, the A/C auto amp. determines the intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When the DEF, D/F, FOOT or OFF switches are pushed, the A/C auto amp. sets the intake door at the fresh position.










Intake Door Control Specification


COMPONENT DESCRIPTION

Intake door motor





The intake door motor is attached to the intake unit. It rotates so that air is drawn from inlets set by the A/C auto amp. Motor rotation is conveyed to a lever which activates the intake door.


Intake Door Motor Component Function Check

INSPECTION FLOW

1. CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC ()

1.Press the mode switch to vent mode().
2.Press REC () switch. The REC ()indicator should illuminate.
3.Press REC () switch again. The REC () indicator should go out.
4.Listen for intake door position change (you should hear blower sound changes slightly).
Is the inspection result normal?
YES- Inspection End.
NO- Go to diagnosis procedure. Automatic Air Conditioning.


Intake Door Motor Diagnosis Procedure

Regarding Wiring Diagram information, Automatic Air Conditioning.
- Intake door does not change.
- Intake door motor does not operate normally.

1. CHECK INTAKE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND

1.Turn ignition switch OFF.
2.Disconnect the A/C auto amp. harness connector M49 and the intake door motor harness connector M58.
3.Check continuity between A/C auto amp. harness connector M49 terminals 21, 22 and the intake door motor harness connector M58 terminals 1, 6.





4.Check continuity between A/C auto amp. harness connector M49 terminals 21, 22 and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness as necessary.

2. CHECK A/C AUTO AMP. FOR INTAKE AIR DOOR MOTOR POWER AND GROUND

1.Reconnect A/C auto amp. harness connector.
2.Turn ignition switch ON.
3.Check voltage between A/C auto amp. harness connector M49 terminal 21 and terminal 22 while placing the HVAC system into self-diagnostic mode.





Is the inspection result normal?
YES- Inspect intake air door for binding or mechanical failure. If intake air door moves freely, replace the intake air door motor. Intake Door Motor.
NO- Replace A/C auto amp. Service and Repair.