Service Repair

Subaru Driver Monitoring System Is Inoperative

Sept. 28, 2020

According to reports posted on the Mitchell1 Pro-Demand site, a small number of field reports have been received involving the Subaru DMS (Driver Monitoring System) being inoperative.

Information courtesy of Mitchell 1

Mike Mavrigian

According to reports posted on the Mitchell1 Pro-Demand site, a small number of field reports have been received involving the Subaru DMS (Driver Monitoring System) being inoperative.

One of these reports stated a DTC U0156 for lost communication was stored in multiple modules. In addition, the seat memory feature was also found to be inoperative. The root cause was traced to a loose harness connector located behind the lower exterior trim cover of the driver’s door mirror assembly.

After re-seating the connector and making sure that it was locked in place, all systems returned to normal operation.

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.

About the Author

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.