Air Mix Door Motor

AIR MIX DOOR MOTOR

Description


COMPONENT DESCRIPTION






- The air mix door motor (1) is installed to the A/C unit assembly.
- The step motor system is adopted for air mix door motor.
- When a drive signal is input from auto amp. to door motor, a step motor built into the door the door motor rotates according to the drive signal, and then stops at the position of target door.

DRIVE SYSTEM OF STEP MOTOR TYPE DOOR MOTOR

- Motor is actuated in sequence by energizing four drive coils.
- Rotation direction can be changed by changing pattern of excitation.







Diagnosis Procedure


1. CHECK FUSE

Check 10A fuse [No. 2, located in the fuse block (J/B)].
NOTE:
Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES- GO TO 2.
NO- Replace fuse after repairing the applicable circuit.

2. CHECK POWER SUPPLY OF AIR MIX DOOR MOTOR

1.Turn the ignition switch OFF.
2.Disconnect the air mix door motor connector.
3.Turn the ignition switch ON.
4.Check voltage between air mix door motor harness connector and the ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair the harnesses or connectors.

3. CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND AIR MIX DOOR MOTOR

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Check continuity between air mix door motor harness connector and the ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair the harnesses or connectors.

4. CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND GROUND

Check continuity between A/C auto amp. harness connector and the ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair the harnesses or connectors.

5. CHECK AIR MIX DOOR MOTOR

Perform the component inspection of air mix door motor. .
Is the inspection result normal?
YES- Replace the A/C auto amp.
NO- Replace the air mix door motor.


Component Inspection


1. CHECK AIR MIX DOOR MOTOR

1.Turn the ignition switch OFF.
2.Remove the air mix door motor. Door Motor.
3.Check the resistance between air mix door motor terminals. Refer to the applicable table for the normal value.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace the air mix door motor.