Check System

NOTE:

The wiper deicer does not operate when the ambient temperature becomes 5°C (41°F) or more.
The wiper deicer operates with the rear window defogger at the same time.
It is possible to perform a forced operation if you keep holding the rear window defogger switch for 3 seconds or more.

Symptoms	Inspection order
Wiper deicer does not operate.	Check the fuse. Check the wiper deicer relay. Check the wiper deicer switch. Check the heat wire. Check the wiring harness. Check body integrated unit.

NOTE:

Wiper deicer system can be customized using the Subaru Select Monitor, when the customize setting {Auto A/C Setting} of the body integrated unit is set to {support}.
Set the system using the rear defogger operation mode, and setting will be the same as rear defogger system setting.

System name

Initial setting

Customize setting

Rear defogger operation mode

OFF after 15 min.

Continuous operation⁽¹⁾

⁽¹⁾	When one of the following conditions occurs, continuous operation is suspended and turned off after 15 minutes.

Ambient temperature at 5°C (41°F) or more continues for 10 seconds.
Malfunction occurs on ambient sensor.
Vehicle speed of 15 km/h (9 MPH) or less continues 15 minutes (OFF when conditions are met)
Malfunction occurs in CAN communication.
Battery voltage remains at 10 V or less for 30 seconds.
SI-DRIVE [I] mode driving continues for 10 seconds.