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Re: main 12V battery doesn't charge, no communication with HPCM
Posted to Technical Discussion Forum on 3/12/2025

Did the Stop/Start battery on the passenger side test good after charging?

Just for clarity sake, Subaru calls the driver's side group 35-sized battery the Auxiliary battery.

Check scan data for "Battery Estimated Life" and SoC/SoH values.

Check HPCM and... Login to read more.