How to solve BMW CAS3/3+ CAS4/4+ decryption data failed

Here is YANHUA MINI ACDP for BMW CAS3/3+ CAS4/4+ FAQs:

Analysis of BMW CAS3/3+ decryption data failed

Question: When reading CAS3/3+ by ICP and all pin detection passes, Why the data cannot be read?

Specific tips are as below:

Answer: If the above problem occurs, the decryption progress bar will reach 100%. But in normal cases, the chip decryption progress bar will not reach 100%. At the moment, Need to detect whether the ETX and C-GND pins of the CAS3/3+ interface board are in good connection. The data can only be decrypted when the pin detection passes and ETX and C-GND pins in good connection.

The ETX and C-GND pin interface board locations are shown as below:

Analysis of BMW CAS4/4+ decryption data failed

Question: When reading CAS4/4+ by ICP and all pin detection passes, Why the data cannot be read?

Specific tips are as below :

Answer: If the above problem occurs, the decryption progress bar will reach 100%. But in normal cases, the chip decryption progress bar will not reach 100%. At the moment, Need to detect whether the EXT and C-GND pins of the CAS4/4+ interface board are in good connection. The data can only be decrypted when the pin detection passes and EXT and C-GND pins in good connection.