What BYD’s own Emergency Response Guide requires when a high-voltage pack is damaged: the 24-hour cooling figure, the 45-minute release window, the 15 m isolation distance, and the four methods the manufacturer explicitly rules out. Written from the source document, for workshops that are handed a flooded or collision-damaged car.
What BYD coolant type and capacity actually are, model by model, taken from all ten official English handbooks: four different spec names for one chemistry, freezing points that are not interchangeable, and why PHEV models have two separate circuits.
The complete BYD Dolphin fuse box diagram in English, straight from the owner’s handbook: all 53 under-hood PDB positions, all 31 dashboard PDB positions, what each fuse protects, and why the amperage in your car may not match the book.
The official BYD high voltage shutdown procedure in English, taken from the manufacturer’s emergency response guide: both disable methods, the 60-second de-energising window, why deployed airbags matter, and the one assumption that keeps you alive around orange cables.
The official BYD Atto 3 service schedule in English: every inspection interval, the items that are replaced on a fixed cycle, the severe-duty conditions that shorten intervals, and what an independent workshop can and cannot do.
A Model Y has no PTC cabin heater to fall back on. This is the diagnostic order that separates airflow, coolant flow, refrigerant charge and valve routing — with the correction codes and flat rate times for each branch.
Why a Model Y won’t charge is usually decided in the charge port assembly — latch, ECU, pin condition or door mechanism. Here is how the sub-systems break down and which order to test them in, with OEM correction codes and torque data.
How the Model Y high-voltage battery coolant circuit is laid out, which parts have published service procedures, and how to approach a coolant loss complaint without pulling the pack.
