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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Auto Ac) (Diagnostics) >> Diagnostics with Phenomenon >> Diagnostic Procedure With Phenomenon >> Cold Air Not Emitted >> Trouble Symptom >> Trouble causes

Trouble causes

Step Check Yes No
1 CHECK MAX COOL. 
Set the A/C control panel switch as described below.
Temperature control switch: MAX COOL FRESH/RECIRC switch: RECIRC Mode switch: VENT
A/C switch: ON
Does no cold air come out? Go to step . Go to step .
2 CHECK AIRFLOW CAPACITY. 
Check the airflow capacity. Refer to AIR DOES NOT COME OUT, OR AIRFLOW CAPACITY IS INSUFFICIENT .
Is the airflow capacity normal? Go to step . Perform repair according to inspection procedure.
3 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 .
For vehicles with manual air conditioner Go to step .
Perform repair according to refrigerant pressure inspection.
4 CHECK A/C CONTROL PANEL (VEHICLES WITH AUTOMATIC AIR CONDITIONER). 
  1. Continue clicking the temperature control switch (driver's) and (passenger's).
  2. 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 . Replace the A/C control panel. Refer to REMOVAL .
5 CHECK A/C CONTROL PANEL (VEHICLES WITH AUTOMATIC AIR CONDITIONER). 
  1. Continue clicking the temperature control switch Δ (driver's).
  2. 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 . Replace the A/C control panel. Refer to REMOVAL .
6 CHECK A/C CONTROL PANEL (VEHICLES WITH MANUAL AIR CONDITIONER). 
  1. Set the temperature control switch dial to MAX COOL.
  2. 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 . Replace the A/C control panel. Refer to REMOVAL .
7 CHECK A/C CONTROL PANEL (VEHICLES WITH MANUAL AIR CONDITIONER). 
  1. Set the temperature control switch dial to MAX HOT.
  2. 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 . Replace the A/C control panel. Refer to REMOVAL .
8 CHECK DTC. 
  1. Turn the ignition switch to ON.
  2. 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.)
  3. 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 CHECK DTC. 
  1. Turn the ignition switch to ON.
  2. 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.)
  3. 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 10  .
10 CHECK INTAKE DOOR ACTUATOR. 
Visually check the intake door actuator operation.
Is the intake door actuator normal? Go to step 11  . Check the intake door actuator. Refer to UNABLE TO SWITCH SUCTION VENTS .
11 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 12  . Replace the evaporator sensor. Refer to REMOVAL .
12 CHECK IN-VEHICLE SENSOR UNIT (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). 
Check in-vehicle sensor. Refer to INSPECTION .
Is the in-vehicle sensor normal? Go to step 13  . Replace the in-vehicle sensor. Refer to REMOVAL .
13 CHECK AMBIENT SENSOR (VEHICLES WITH AUTOMATIC AIR CONDITIONER ONLY). 
Check the ambient sensor. Refer to INSPECTION .
Is the ambient sensor normal? Go to step 14  . Replace the ambient sensor. Refer to REMOVAL .
14 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 .