Unable To Switch Suction Vents

Trouble symptom: 

Even when the FRESH/RECIRC switch is pressed, the inlet opening does not switch to RECIRC → FRESH or FRESH → RECIRC.

Trouble causes: 

• Intake door actuator failure
• UART communication failure

Courtesy of SUBARU OF AMERICA, INC.

1. VISUALLY CHECK FRESH/RECIRC DOOR OPERATION  .
   1. Remove the glove box. Ref. to EXTERIOR/INTERIOR TRIM>GLOVE BOX>REMOVAL
   2. Operate the FRESH/RECIRC switch, and visually check the intake door operation.

   Does the intake door operate normally? Is the position between the intake door and intake door case sealed completely?

   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  : Go to  2.

2. CHECK A/C CONTROL PANEL  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DATA MONITOR .
      • Fresh/Recircle Air Door Actuator Position Target
   3. Operate the FRESH/RECIRC switch.

   Does [Fresh/Recircle Air Door Actuator Position Target] indicate 0 ←→ 100?

   Yes  : Go to  3.

   No  : Replace the A/C control panel. Ref. to AIR CONDITIONER (HEV)>CONTROL PANEL .

3. CHECK DTC  .
   1. Turn the FRESH/RECIRC switch to RECIRC, and leave for 16 seconds or more.
   2. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B14E9, B14EA or B14EB displayed? (Current malfunction)

   Yes  : Perform the diagnosis for the displayed DTC B14E9, B14EA, or B14EB. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14E9 INTAKE DOOR ACTUATOR CIRCUIT OPEN . Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT . Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14EB INTAKE DOOR ACTUATOR STUCK .

   No  : Go to  4.

4. CHECK DTC  .
   1. Turn the FRESH/RECIRC switch to FRESH, and leave for 16 seconds or more.
   2. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B14E9, B14EA or B14EB displayed? (Current malfunction)

   Yes  : Perform the diagnosis for the displayed DTC B14E9, B14EA, or B14EB. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14E9 INTAKE DOOR ACTUATOR CIRCUIT OPEN . Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT . Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14EB INTAKE DOOR ACTUATOR STUCK .

   No  : 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.