The Windshield Glass Is Not Cleared Even When The Def Switch Is Turned To On

WARNING: This page is about a different variant/trim than selected.

Trouble symptom:

Defroster indicator does not illuminate, outlet opening does not switch to DEF, compressor does not switch to ON, and inlet opening does not switch to FRESH, even when the DEF switch is turned to ON.

Trouble causes:

CAN communication failure
A/C control panel failure
Mode door actuator failure
Compressor failure
Intake door actuator failure

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)> GENERAL DESCRIPTION> CAUTION .

CHECK A/C CONTROL PANEL .
1. Start the engine.
2. Turn the DEF switch of the A/C control panel to ON.
3. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)> DATA MONITOR .
  - Mode Door Actuator Position Target
  - Variable Flow Change Solenoid Duty (variable A/C model)
  - Fresh/Recircle Air Door Actuator Position Target
  Does [Mode Door Actuator Position Target] indicate 100%, [Variable Flow Change Solenoid Duty] indicate 0% or more, and [Fresh/Recircle Air Door Actuator Position Target] indicate 100%?
  
  Yes: Go to 2.
  
  No: Replace the A/C control panel Ref. to AIR CONDITIONER (EXCEPT FOR HEV)> CONTROL PANEL .
CHECK MODE DOOR ACTUATOR .
With the DEF switch ON, check the mode door operation.

Does the air come out from the DEF outlet opening?

Yes: Go to 3.

No: Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>UNABLE TO SWITCH BLOW VENTS .
CHECK INTAKE DOOR ACTUATOR .
With the DEF switch ON, check the FRESH/RECIRC door operation.

Is FRESH/RECIRC switch turned to "FRESH"?

Yes: Go to 4.

No: Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>UNABLE TO SWITCH SUCTION VENTS .
CHECK COMPRESSOR .
With the DEF switch ON, check the compressor operation.

Does the compressor operate?

Yes: The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

No: Ref. to AIR CONDITIONER (DIAGNOSTICS) (EXCEPT FOR HEV)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>COLD AIR DOES NOT COME OUT EVEN WHEN THE A/C SWITCH IS PRESSED. GLASS CANNOT BE DEFOGGED (COMPRESSOR DOES NOT OPERATE (VARIABLE)) .