Postby ArT » Thu Oct 28, 2021 4:32 pm
What voltage is on chip when you connect power supply to ECU? I'm asking because 93xx series are usually for 5V and 3v3 maybe to low. You can try with higher voltage but first you need to make sure that all chips around will be fine with higher voltage. But if you have bus conflict (MCU is communicating with eeprom as fast as you connect power supply to it) then it's nothing you can do - only disconnecting eeprom from board. Discharging capacitors won't help, when you connect power supply to eeprom it will power all circuit around (connected to the same power line). I recommend to identify this chip exactly and check what voltage range is required for read/write - some 93xx needs minimum 4.5V, some 93xx allows programming as low as 2.5 volts - depends on variant and manufacturer. It's quite easy to desolder this chip with hotair gun, a lot of space around