Seat Ventilation Turns Off, But Seat Heater Does Not Operate

Trouble symptom: 

The seat ventilation turns off, but the seat heater does not operate, even if the seat heater switch is touched while the seat ventilation 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 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  2 .

      No:  Repair the connector.

2. 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  3 .

3. CHECK SEAT VENTILATION OPERATION  .
   1. Touch the seat ventilation switch on the center information display.
   2. Check if the seat ventilation is operating normally.

      Is the seat ventilation operation normal?

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

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