Diagnosis Procedure

MODE DOOR MOTOR


Description


COMPONENT DESCRIPTION

Mode Door Motor
The mode door motor (1) are attached to the heater and cooling unit assembly. It rotates so that air is discharged from the outlet set by the unified meter and A/C amp. Motor rotation is conveyed to a link which activates the mode door.










MODE 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-3
Perform self-diagnosis STEP-3. Refer to (Without left and right ventilation temperature separately control system) 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 3.
Does code No. 30 appear on the display?
YES - GO TO 6.
NO-1 - Code No. 31 or 32 appear on the display: GO TO 3.
NO-2 - Code No. 37, 38 or 39 appear on the display: Go to Intake Door Motor Circuit. Refer to Diagnosis Procedure.
3.CHECK POWER SUPPLY FOR MODE DOOR MOTOR
Check voltage between mode door motor harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair harness or connector.
4.CHECK SIGNAL FOR MODE DOOR MOTOR
Confirm A/C LAN signal between mode door motor harness connector and ground using an oscilloscope.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector.
3. Check continuity between mode door motor harness connector and ground.





Is the inspection result normal?
YES - Replace mode door motor.
NO - Repair harness or connector.
6.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to (Without left and right ventilation temperature separately control system) 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 7.
7.CHECK MODE DOOR CONTROL LINKAGE
Check mode door control linkage.
Is it installed normally?
YES - Refer to Exploded View.
NO - Repair or adjust control linkage.