No Connection to Control Unit After Update

Hi,

I finally updated from version 12.12 to 15.7.1 after a long time, and also updated the firmware of my HEX+CAN device from version 1.92 to 1.94 during that process.

Since this update, I can no longer access the engine control unit on my Passat (2.8 VR6, manufactured in 1991, with a 2x2 connector). I still have access to the ABS module, but it no longer loads completely, and I'm also unable to read any error codes.
He connects the airbag without any problems and it also reads the data correctly.

I consider a defect in the control unit or the connector to be unlikely, as I have unrestricted access using our Gutmann tester.

Unfortunately, I uninstalled version 12.12 during the update process.

What could be a reason for this?

Hello,

Please pay attention to the bitrate of the K-line (e.g., 9513) that is briefly displayed in the top left corner of the VCDS window when establishing the connection. Please note down the values for some control units, especially those where it works. }

Best regards, Rainer.

ABS seems to be working now.
B 9625 KW 8980

Airbag B 9675 KW 018A

Resolved, can be closed.

It was my fault; I used the wrong 2x2 adapter.

Okay, thanks for the feedback!