“Most technicians read and write EEPROMs… but very few understand what’s actually happening behind those pins.” 🔧 In today’s video, I’m showing how we check an ECU’s power supply health using something most people overlook — the EEPROM datasheet. Everyone knows how to read and write a 24C02 chip, but how many of us actually study what those pins mean, or understand how VCC, SDA, and SCL behave when the circuit is live? Most locksmiths and ECU techs follow their tool blindly — they click “Read E