This bulletin applies to 2019 Subaru Ascent vehicles. Whenever the Rain Sensor is removed or replaced, initialization of the sensor must be performed. For 2019 Ascent vehicles, the automatic light and wiper (ALW) control module does not display as an available system on SSM4. Setting the SSM4 software as a 2017 Legacy/Outback will allow access to the Ascent ALW and calibration can be performed. As a workaround, if SSM4 is not updated, follow these steps:
Open SSM4 and select Diagnosis.
Enter the vehicle information as 17MY Legacy/Outback.
Connect DST-1 to the OBD connector.
From “Each System” select Automatic Light and Wiper.
From Work Support, select Sensor initial setting.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.