The problem goes like this:
Trying to unlock BMW CAS4+ 5m48h with xhorse vvdi key tool plus. But don’t read, ask me to remove vcc vpp.
Weld method: only read Read D Flash and P Flash, Resistor already removed, good connection.
Also tried CAS4 adapter, same problem, Cleaned contacts every time but no success.
Tips to unlock CAS4 5M48H:
Put adapter on correct pins and do swing movement – press left side then right and keep repeating till eeprom will start read.
Or try to remove the resistor AND warm the chip to 80 degrees to get a consistent read with the cas4 adapter.
You must select CAS4+ R_W_unlock to be able to write on cas … when selecting this option make unlock then you can write D and P Flash.
If still failed, here is xhorse engineer solution:
Update firmware to 9.9.9 and try test function 23.
Prog->More Functions->Others-> Test function-> Test function 23