Cold Air Does Not Come Out Even When The A/C Button Is Pressed; The Glass Cannot Be Defogged. (Compressor Does Not Operate.)

Trouble symptom: 

Compressor does not operate after turning the ON/OFF button to ON and airflow capacity between minimum - maximum.

Trouble causes: 

Compressor failure

1. CHECK CENTER INFORMATION DISPLAY  .
   1. Leave the vehicle under the condition at ambient temperature of 15°C (59°F) or more.
   2. Start the engine.
   3. Set the airflow capacity to maximum.
   4. Set the A/C button to ON.

   Is the A/C button display on the center information display ON?

   Yes:  Go to  2.

   No:  Perform the inspection according to the diagnosis for cockpit control system. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

2. CHECK A/C CONTROL MODULE  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DATA MONITOR .

   • Blower Fan Level

   Does [Blower Fan Level] indicate 120 - 181?

   Yes:  Go to  3.

   No:  Replace the A/C control module. Ref. to AIR CONDITIONER>CONTROL UNIT .

3. CHECK VARIABLE FLOW CHANGE SOLENOID DUTY VALUE  .
   1. Keep the ON/OFF button set to ON.
   2. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DATA MONITOR .
      • Variable Flow Change Solenoid Duty

   Does the display indicate the value greater than 0%?

   Yes:  Go to  7.

   No:  Go to  4.

4. CHECK EVAPORATOR SENSOR  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DATA MONITOR .

   • Evaporator Temperature

   Does the display indicate 3°C (37.4°F) or more?

   Yes:  Go to  6.

   No:  Go to  5.

5. CHECK EVAPORATOR SENSOR  .

   Check the evaporator sensor. Ref. to AIR CONDITIONER>EVAPORATOR SENSOR>INSPECTION .

   Is the check result OK?

   Yes:  Go to  6.

   No:  Replace the evaporator sensor. Ref. to AIR CONDITIONER>EVAPORATOR SENSOR .

6. CHECK REFRIGERANT PRESSURE SENSOR  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Air Conditioner]. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DATA MONITOR .

   • Refrigerant Pressure

   Does the display indicate 0.225 - 2.94 MPa?

   Yes:  Go to  8.

   No:  Go to  7.

7. CHECK AMOUNT OF REFRIGERANT PRESSURE  .

   Check the refrigerant pressure. Ref. to AIR CONDITIONER>REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET .

   Is the check result OK?

   Yes:  Go to  8.

   No:  Perform repair according to refrigerant pressure inspection.

8. CHECK VARIABLE SOLENOID CIRCUIT  .
   1. Set the airflow capacity to maximum.
   2. Set the A/C button to ON.
   3. Set the temperature setting to MAX COOL. (Driver's side, passenger's side)
   4. Leave it for 30 seconds or more.
   5. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B14A7 displayed? (Current code)

   Yes:  Perform the diagnosis for the displayed DTC B14A7. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B14A7 VARIABLE SOLENOID VALVE CIRCUIT .

   No:  Replace the compressor. Ref. to AIR CONDITIONER>COMPRESSOR .