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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 >> Unable To Switch Vents >> Trouble Symptom >> Trouble causes

Trouble causes

Mode door actuator failure

Step Check Yes No
1 CHECK A/C CONTROL PANEL. 
  1. Turn the ignition switch to ON.
  2. Using the Subaru Select Monitor, check "Mode Door Actuator Position Target" of the current data from the A/C diagnosis.
  3. Operate the mode change switch.
 Does the value for "Mode Door Actuator Position Target" change? Go to step 2  . Replace the A/C control panel. Refer to REMOVAL .
2 CHECK DTC. 
  1. Set the mode change switch to DEF, and wait for 16 seconds or more.
  2. Read the DTC using Subaru Select Monitor.
 Are B1620, B1621 and B1622 displayed? Perform the diagnosis according to DTC. Go to step 3  .
3 CHECK DTC. 
  1. Set the mode change switch to VENT, and wait for 16 seconds or more.
  2. Using the Subaru Select Monitor, read DTC of A/C CM.
 Are B1620, B1621 and B1622 displayed? Perform the diagnosis according to DTC. System is normal.
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