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A technical document that addresses the functional impairment of a 48V on-board electrical system in certain vehicle models. It outlines common complaints, causes, and remedies associated with the malfunctioning electrical systems, including details about specific fault codes and proposed solutions. The document provides step-by-step remedies for various causes, from software issues to hardware problems, and emphasizes detailed inspections and updates. Moreover, it includes guidance on troubleshooting and documenting cases in the PTSS system.