Trouble causes

Large airflow capacity
Refrigerant pressure failure
UART communication failure
A/C control panel failure
Air mix actuator (driver's) failure
Air mix actuator (passenger's) failure (with left/right independent air conditioner only)
Rear vent actuator failure (with rear seat air conditioning only)
Evaporator sensor failure (vehicles with automatic air conditioner only)
In-vehicle sensor failure (vehicles with automatic air conditioner only)
Ambient sensor failure (vehicles with automatic air conditioner only)
Sunload sensor failure (vehicles with automatic air conditioner only)

Step	Check	Yes	No
1 CHECK AIRFLOW CAPACITY. Check the airflow capacity. Refer to AIR GOES OUT OF CONTROL .	Is the airflow capacity normal?	Go to step 2 .	Perform repair according to inspection procedure.
2 CHECK AMOUNT OF REFRIGERANT PRESSURE. Check the refrigerant pressure. Refer to CHECK REFRIGERANT GAS PRESSURE .	Is the refrigerant pressure normal?	For vehicles with automatic air conditioner Go to step 3 . For vehicles with manual air conditioner Go to step 5 .	Perform repair according to refrigerant pressure inspection.
3 CHECK A/C CONTROL PANEL (VEHICLES WITH AUTOMATIC AIR CONDITIONER). Continue clicking the temperature control switch (driver's) and (passenger's). Using Subaru Select Monitor, display the following data in "Read Current Data". Heater Control Panel Setting Value (Driver's) Heater Control Panel Setting Value (Passenger's) Rear Vent Actuator Position Target (with rear seat air conditioning only)	Do "Heater Control Panel Setting Value (Driver's)" and "Heater Control Panel Setting Value (Passenger's)" indicate "60"? In addition, does "Rear Vent Actuator Position Target" indicate "74.5"?	Go to step 4 .	Replace the A/C control panel. Refer to REMOVAL .
4 CHECK A/C CONTROL PANEL (VEHICLES WITH AUTOMATIC AIR CONDITIONER). Continue clicking the temperature control switch Δ (driver's). Using Subaru Select Monitor, display the following data in "Read Current Data". Heater Control Panel Setting Value (Driver's) Heater Control Panel Setting Value (Passenger's) Rear Vent Actuator Position Target (with rear seat air conditioning only)	Do "Heater Control Panel Setting Value (Driver's)" and "Heater Control Panel Setting Value (Passenger's)" indicate "90"? In addition, does "Rear Vent Actuator Position Target" indicate "-5.5"?	Go to step 5 .	Replace the A/C control panel. Refer to REMOVAL .
5 CHECK A/C CONTROL PANEL (VEHICLES WITH MANUAL AIR CONDITIONER). Set the temperature control switch dial to MAX COOL. Using Subaru Select Monitor, display the following data in "Read Current Data". Target air mix door actuator position (driver's side)	Does "Target air mix door actuator position (driver's side)" indicate "0%"?	Go to step 6 .	Replace the A/C control panel. Refer to REMOVAL .
6 CHECK A/C CONTROL PANEL (VEHICLES WITH MANUAL AIR CONDITIONER). Set the temperature control switch dial to MAX HOT. Using Subaru Select Monitor, display the following data in "Read Current Data". Target air mix door actuator position (driver's side)	Does "Target air mix door actuator position (driver's side)" indicate "100%"?	Go to step 7 .	Replace the A/C control panel. Refer to REMOVAL .
7 CHECK DTC. Turn the ignition switch to ON. Set the temperature control switch to MAX COOL, and wait for 16 seconds or more. (For vehicles with left/right independent air conditioner, perform setting on both sides.) Read the DTC using Subaru Select Monitor.	Are DTCs B1610, B1611, B1612, B1613, B1614, B1615, B1630, B1631 and B1632 displayed?	Perform the diagnosis according to DTC.	Go to step 8 .
8 CHECK DTC. Turn the ignition switch to ON. Set the temperature control switch to MAX HOT, and wait for 16 seconds or more. (For vehicles with left/right independent air conditioner, perform setting on both sides.) Read the DTC using Subaru Select Monitor.	Are DTCs B1610, B1611, B1612, B1613, B1614, B1615, B1630, B1631 and B1632 displayed?	Perform the diagnosis according to DTC.	Go to step 9 .
9 CHECK EVAPORATOR SENSOR UNIT (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). Perform the inspection of evaporator sensor unit. Refer to INSPECTION .	Is the evaporator sensor normal?	Go to step 10 .	Replace the evaporator sensor. Refer to REMOVAL .
10 CHECK IN-VEHICLE SENSOR UNIT (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). Check in-vehicle sensor circuit. Refer to INSPECTION .	Is the in-vehicle sensor circuit normal?	Go to step 11 .	Replace the in-vehicle sensor. Refer to REMOVAL .
11 CHECK AMBIENT SENSOR (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). Check ambient sensor circuit. Refer to INSPECTION .	Is the ambient sensor circuit normal?	Go to step 12 .	Replace the ambient sensor. Refer to REMOVAL .
12 CHECK SUNLOAD SENSOR UNIT (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). Check the sunload sensor unit. Refer to INSPECTION .	Is the sunload sensor normal?	System is normal.	Replace the sunload sensor. Refer to REMOVAL .