TechnicianVision · Knowledge base
48-Volt Mild Hybrid Systems: Audi
I-CAR · January 11, 2024 · Audi
Summary
This article outlines the requirements for identifying and de-energizing Audi's 48-volt mild hybrid systems, which support advanced start/stop modes and roll stabilization. It establishes that the 12V system cannot be fully de-energized without first de-energizing the 48V system, which requires a scan tool test plan and physical disconnection of the 48V Lithium-ion battery.
What to do on the job
De-energize the 48V system using a scan tool test plan and separately disconnect the 48V Lithium-ion battery before attempting to de-energize the 12V electrical system.
How to use it
Use this document to justify the labor time and scan tool operations required to safely de-energize and re-initialize the 48V and 12V electrical systems on Audi mild-hybrid vehicles. It proves that a standard 12V battery disconnect is insufficient and unsafe on these models without performing the OEM-specified 48V de-energizing test plan first.
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