Air Mix Door Motor

AIR MIX DOOR MOTOR

Diagnosis Procedure


1. CHECK AIR MIX DOOR MOTOR POWER SUPPLY

1.Turn ignition switch ON.
2.Check voltage between air mix door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 5.

2. CHECK AIR MIX DOOR MOTOR GROUND CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect air mix door motor and front air control connector.
3.Check continuity between air mix door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.

3. CHECK AIR MIX DOOR MOTOR LIN SIGNAL

1.Connect air mix door motor and front air control connector.
2.Turn ignition switch ON.
3.Confirm output waveform between air mix door motor harness connector and ground using oscilloscope.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 6.

4. CHECK INSTALLATION OF AIR MIX DOOR MOTOR

Check air mix door motor is properly installed. Refer to "Exploded View" Exploded View.
Is the inspection result normal?
YES- Replace air mix door motor. Refer to "AIR MIX DOOR MOTOR : Removal and Installation" Air Mix Door Motor.
NO- Repair or replace malfunctioning part.

5. CHECK AIR MIX DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect air mix door motor and front air control connector.
3.Check continuity between air mix door motor harness connector and front air control connector.





Is the inspection result normal?
YES- Replace front air control. Refer to "Removal and Installation" Manual Air Conditioning.
NO- Repair harness or connector.

6. CHECK AIR MIX DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

1.Turn ignition switch OFF.
2.Disconnect air mix door motor and front air control connector.
3.Check continuity between air mix door motor harness connector and front air control harness connector.





Is the inspection result normal?
YES- Replace front air control. Refer to "Removal and Installation" Manual Air Conditioning.
NO- Repair harness or connector.