Seat Heater Turns Off, Seat Ventilation Does Not Operate

Trouble symptom: 

The seat heater turns off, but the seat ventilation does not operate, even if the seat ventilation switch is touched while the seat heater is operating.

Trouble causes: 

• Seat ventilation control module failure
• A/C control module failure
• Seat ventilation circuit failure
• Seat heater circuit failure
• Center information display failure
• Cockpit control module failure
• Seat ventilation blower failure
• Seat heater failure

1. CHECK SEAT SPECIFICATION  .

   Check the vehicle specification.

   Is this vehicle equipped with seat ventilation?

   Yes:  Go to  2 .

   No:  Switching to seat ventilation is not possible.

2. CHECK SEAT VENTILATION SWITCH DISPLAY  .
   1. Turn the ignition switch to ON.
   2. Touch the seat indicator on the center information display.
   3. Check if the seat ventilation switch is displayed under the seat heater switch.

      Is the seat ventilation switch displayed?

      Yes:  Go to  3 .

      No:  Ref. to VENTILATION SEAT (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>SEAT VENTILATION SWITCH IS NOT DISPLAYED .

3. CHECK CONNECTOR  .
   1. Turn the ignition switch to OFF.
   2. Check connecting condition of the seat ventilation control module connector (St41), A/C control module connectors (i107) (i108), seat connectors (L57) (R57), coupling connectors (B43) (L51) (R51) (St21) (St22), heater connectors (St27) (St28), and blower connectors (St71) (St72).

      Is the check result OK?

      Yes:  Go to  4 .

      No:  Repair the connector.

4. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the following DTCs using Subaru Select Monitor. Ref. to Ventilation Seat (Diagnostics)>Diagnostic Trouble Code (DTC) . Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
      • Ventilation Seat
      • Body Control
      • Air Conditioner
      • Cockpit Control

      Are any DTCs displayed?

      Yes:  Perform the diagnosis for the displayed DTCs. Ref. to Ventilation Seat (Diagnostics)>Diagnostic Trouble Code (DTC) . Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

      No:  Go to  5 .

5. CHECK SEAT HEATER OPERATION  .
   1. Start the engine.
   2. Touch the seat heater switch.
   3. After a predetermined period of time, check if the seat heater is operating normally.

      Is the seat heater operation normal?

      Yes:  Ref. to VENTILATION SEAT (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>SEAT VENTILATION CANNOT BE OPERATED .

      No:  Ref. to VENTILATION SEAT (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>SEAT HEATER CANNOT BE OPERATED .