Думал, что я профи, пока не приехала эта Фиеста... Долгий путь к истине

This video presents a real challenge for an auto electrician. A Ford Fiesta was towed after another service center simply threw up their hands. The car has a life of its own: it stalls while driving, displays an immobilizer error, and the customer is convinced it all started with simply using the windows. I went through everything: checking the ECU power supply, searching for a short circuit in the CAN bus, disconnecting the ABS and BCM units. It seemed like the cause was obvious, but Ford kept throwing up new mysteries. Ultimately, diagnostics turned into a test of endurance. Watch until the end to see how they revived the control unit, why warming it up with a hair dryer helped find the culprit, and how much the repair ultimately cost the owner. ✅ In this video: Why doesn't the diagnostics detect the ECU? How can the CAN bus "go down" and then "go up again" on its own? Control unit repair: processor replacement or buying a used one? Why do Ford wiring often rot, and what does this have to do with window regulators? 📍 For questions about auto electrics training and purchasing equipment, please send a private message: https://t.me/besh_elec https://vk.com/club226236112 HOW TO ASSEMBLE A CONTROL BOARD:    • Делаю контрольку (+схема) как у УСПЕШНОГО ...   ABOUT BUYING A SCANNER: https://t.me/besh_elec https://vk.com/club226236112 Telegram Channel: https://t.me/beshen_elek 00:00 — A desperate customer: the story of a Ford Fiesta breakdown 03:07 — Why couldn't the previous electrician help? 04:50 — Error: "Immobilizer is faulty" 06:40 — Primary diagnostics: ECU does not communicate 09:58 — Checking the power supply and pinout of the control unit 14:15 — First surprise: strange behavior of the CAN bus 18:35 — The magic of a multimeter: looking for a short circuit 24:30 — Methodically disconnecting units: ABS, BCM, power steering 31:00 — Checking the robotic unit (automatic transmission) 35:05 — Solution: removing the ECU for a detailed inspection 36:15 — Miracle in the workshop: the unit came to life after warming up! 39:40 — First engine start after "resuscitation" 41:10 — Too early to rejoice... The car stalled again 44:15 — ECU specialist's verdict: what happened to the processor? 47:15 — Final inspection after repair and cost 51:50 — Diagnostic results and advice for Ford owners