Troubleshooting Subaru Start Stop
Mitchell 1 reports that the Subaru Techline has been receiving an increased amount of calls on Hybrid Subaru vehicles with a concern of no Auto Start Stop operation, with or without DTCs.
If you encounter one of these issues, a necessary step to include in your diagnosis should be to check the 12V restart battery condition with the DSS. They have seen a bad restart battery accompany DTCs related to the integrated starter generator (ISG) along with disabling both the Auto Start Stop and EV travelling modes.
If DTCs are involved, the applicable troubleshooting procedure should be followed including battery testing.
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.