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AV-SCANNER / Service function guides / Driver assistance and hybrid
This guide delivers the complete high voltage safety procedure that working mechanics and serious DIYers must follow before touching any hybrid or electric vehicle (EV) system. It explains how high voltage architectures work, when isolation is mandatory, how to prepare the vehicle and yourself, and the full step-by-step sequence for verified isolation. You will learn to confirm zero potential, handle failure modes, adapt the procedure across vehicle types, and perform aftercare so the car returns to service safely. By the end you will be able to isolate a high voltage system with documented proof and recognize the conditions that demand a stop-work decision.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
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