Diagnosis Procedure

INTAKE DOOR MOTOR


Description


COMPONENT DESCRIPTION

Intake Door Motor
The intake door motor (1) is attached to the blower unit. It rotates so that air is drawn from inlets set by the unified meter and A/C amp.





Motor rotation is conveyed to a lever which activates the intake door.






INTAKE DOOR MOTOR


Diagnosis Procedure

1.PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos. 1 to 2.
Does code No. 20 appear on the display?
YES - GO TO 2.
NO - Go to appropriate malfunctioning sensor circuit. Refer to Diagnosis Description, "WITHOUT LEFT AND RIGHT
VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT
AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see No. 11.
2.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos. 1 to 5.
Is it operated normally?
YES - END.
NO - GO TO 3.
3.CHECK INTAKE DOOR CONTROL LINKAGE
Check intake door control linkage.
Is it installed normally?
YES - GO TO 4.
NO - Repair or adjust control linkage.
4.CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
Check voltage between intake door motor harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK SIGNAL FOR INTAKE DOOR MOTOR
Confirm A/C LAN signal between intake door motor harness connector and ground using an oscilloscope.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair harness or connector.
6.CHECK INTAKE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake door motor connector.
3. Check continuity between intake door motor harness connector and ground.





Is the inspection result normal?
YES - Replace intake door motor.
NO - Repair harness or connector.