- Joined
- Jul 21, 2026
- Messages
- 41
- Reaction score
- 6
- Location
- Colorado Springs, CO, USA
- VCDS Serial number
- C?ID=61888
I'm not sure this is an SFD issue, but...
I just got a new 2026 Volkswagen Jetta GLI. I'm coming from two 2009 Mk5s, and have been an authorized VCDS user since that year; but I just upgraded to HEX-VW Enthusiast, and am experimenting as to what I can and can't do with it on the new GLI.
I'm aware generally of the protections that VW has introduced since 2009 -- the hood-open requirement in about 2015, and more-recently SDF and SDF2.
I won't need to replace the battery until three years from now, but I'm trying to see whether VCDS will allow me to register or do an adaptation on the new battery when the time comes.
I've read the Wiki article on battery replacement: https://wiki.ross-tech.com/wiki/index.php/Battery_Replacement
My Battery Monitoring Control Module is a subsystem of the CAN Gateway:

But when I open the 19-CAN Gateway module and press the Adaptation button, I get this error about the diagnostics firewall being on, and that I should open my hood:

Hood is open. Ignition is on; I've tried with engine both on and off.
This error appears whenever I do anything that even looks like I'm trying to modify or adapt something.
I might add that I also have the Carista diagnostics tool; and it seems to allow me to register a new battery without any firewall issues...
I just got a new 2026 Volkswagen Jetta GLI. I'm coming from two 2009 Mk5s, and have been an authorized VCDS user since that year; but I just upgraded to HEX-VW Enthusiast, and am experimenting as to what I can and can't do with it on the new GLI.
I'm aware generally of the protections that VW has introduced since 2009 -- the hood-open requirement in about 2015, and more-recently SDF and SDF2.
I won't need to replace the battery until three years from now, but I'm trying to see whether VCDS will allow me to register or do an adaptation on the new battery when the time comes.
I've read the Wiki article on battery replacement: https://wiki.ross-tech.com/wiki/index.php/Battery_Replacement
My Battery Monitoring Control Module is a subsystem of the CAN Gateway:

But when I open the 19-CAN Gateway module and press the Adaptation button, I get this error about the diagnostics firewall being on, and that I should open my hood:

Hood is open. Ignition is on; I've tried with engine both on and off.
This error appears whenever I do anything that even looks like I'm trying to modify or adapt something.
I might add that I also have the Carista diagnostics tool; and it seems to allow me to register a new battery without any firewall issues...



