The instruction is to force Unlock BMW CAS4 with Xhorse Multi Prog if simple Unlock does not work.
Connect CAS4 module with multi prog via mcu adapter.
First we try simple unlock.
Select CAS4-5M48H-R/W/UNLOCK option
Select Unlock
Confirm you already backed up eeprom and flash.
Unlock failed. Then we try force unlock.
Select CAS4-5M48H-Force UNLOCK option in multi prog software.
Press UNLOCK.
Unlock CAS4 chip successfully.
Then select CAS4-5M48H-R/W/UNLOCK again
Read chip ID.
Read D-flash and P-flash then save.
