DTC B14EB: Intake Door Actuator Stuck

DTC detecting condition: 

Lock condition is detected for 3 seconds or more during intake door actuator operation.

Trouble symptom: 

FRESH/RECIRC does not operate.

Wiring diagram: 

Air conditioning system Refer to WIRING SYSTEM>AIR CONDITIONING SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK CONNECTOR. 
   1. Check the condition of connector connection.
   2. Read the DTC using Subaru Select Monitor. Refer to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B14EB displayed?

   Yes:  Go to  2.

   No  Even if DTC is displayed, 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.
2. CHECK CURRENT DATA. 

   Using the Subaru Select Monitor, change the setting of "Fresh/Rec Air Dr Act Trgt Open Angle" from Air Conditioning Diagnosis and perform the active test. Refer to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>SYSTEM OPERATION CHECK MODE .

   Did the actuator move to the specified target opening angle?

   Yes  Intake door actuator circuit is normal.

   No:  Go to  3.

3. CHECK HARNESS (OPEN CIRCUIT). 
   1. Turn the ignition switch to ON.
   2. Using the tester, measure the voltage between terminals.

   Connector & terminal 

   (B163) No. 4 (+) - No. 6 (-):

   Is the voltage 4.5 - 5.0 V?

   Yes:  Go to  4.

   No  Repair or replace the open circuit of harness.

4. CHECK HARNESS (OPEN CIRCUIT). 
   1. Disconnect the connector from the A/C control panel.
   2. Using a tester, check continuity between terminals.

   Connector & terminal 

   (B163) No. 1 - (i88) No. 8:

   (B163) No. 2 - (i88) No. 6:

   (B163) No. 4 - (i88) No. 10:

   (B163) No. 5 - (i88) No. 12:

   (B163) No. 6 - (i88) No. 14:

   Is there continuity?

   Yes:  Go to  5.

   No  Repair or replace the open circuit of harness.

5. CHECK INTAKE DOOR ACTUATOR. 

   Check the intake door actuator parts.

   Is the check result of the actuator OK?

   Yes  Replace the A/C control panel. Refer to HVAC SYSTEM (HEATER, VENTILATOR AND A/C)>CONTROL PANEL>REMOVAL .

   No  Replace the actuator. Refer to HVAC SYSTEM (HEATER, VENTILATOR AND A/C)>FRESH/RECIRC DOOR ACTUATOR>REMOVAL .