VAG-COM/VCDS EVERYTHING

**bendzji** · 19th January, 2021, 10:18 PM

I have connection problems with my "real" HEXv2 - STM32F405 chip. Can works nicely and quick but K-line is crappy. No communication in A4 b6/b7 and a6 c5 with some modules like 37 navigation and 56 radio ( RNSE ) , 77 telephone ( bluetooth module ) , even sometimes cluster.

On KKL cable and Hex based on Atmega no problems with communication - so it's not a problem in the car.

Firmware updated , checked on different version of VCDS ( 20.12 , 20.04 , 18.9 ) - still the same problem , here's a photo of insides of cable , two l9637d are used to communicate on K lines - maybe its their fault? Any idea? Maybe some settings?

**sdyt** · 20th January, 2021, 12:56 AM

I actually did some code change with it on my 2018 Atlas with 20.12.0. I think it's working at least for now.

**flyfvdi** · 20th January, 2021, 06:02 AM

Originally Posted by badrax

If anyone with the non upgradable 405 want to do some testing then please PM me for more details

STM32F405 VCDS Hex-V2 can update freely by VII Plua Loader

**flyfvdi** · 20th January, 2021, 06:08 AM

Originally Posted by bendzji

I have connection problems with my "real" HEXv2 - STM32F405 chip. Can works nicely and quick but K-line is crappy. No communication in A4 b6/b7 and a6 c5 with some modules like 37 navigation and 56 radio ( RNSE ) , 77 telephone ( bluetooth module ) , even sometimes cluster.

On KKL cable and Hex based on Atmega no problems with communication - so it's not a problem in the car.

Firmware updated , checked on different version of VCDS ( 20.12 , 20.04 , 18.9 ) - still the same problem , here's a photo of insides of cable , two l9637d are used to communicate on K lines - maybe its their fault? Any idea? Maybe some settings?

Already fixed, use VIIPlusLoader-08.021.01-EN-Installer, update it

VIIPlusLoader-08.021.01-EN-Installer.rar mega.nz download link:

https://mega.nz/file/FxkVxQgZ#Pknh_d...YwHSpDv1zxUTBU

**flyfvdi** · 20th January, 2021, 06:15 AM

Originally Posted by StanNB

OK. My 405 is upgradable and works fine with VII Plus Loader in any language.

But my 415 don't work with the loader, is not upgradable and only support VCDS up to 20.4.1 and only in english.

For the 415 I need a solution to upgrade, like in your video.

415 vcds hex v2 never update, with many bugs, can not support multi-languages

**bendzji** · 20th January, 2021, 10:35 AM

@flyfvdi not fixed , have the latest update installed and firmware upgrade , it was the first thing I have done after encountering these problems

**StanNB** · 20th January, 2021, 11:27 AM

Originally Posted by flyfvdi

STM32F405 VCDS Hex-V2 can update freely by VII Plua Loader

Yes, normally. But there are some PCB with 405 that are not able to update with VII Plus Loader.

Originally Posted by flyfvdi

415 vcds hex v2 never update, with many bugs, can not support multi-languages

True, too. For now. But maybe we'll find a way to update 415. It's not impossible.

**flyfvdi** · 21st January, 2021, 05:50 AM

Originally Posted by bendzji

@flyfvdi not fixed , have the latest update installed and firmware upgrade , it was the first thing I have done after encountering these problems

please contact me by private message, i can give you the vcds 405 factory technical support engineer contact mode.

**flyfvdi** · 21st January, 2021, 05:51 AM

Originally Posted by StanNB

Yes, normally. But there are some PCB with 405 that are not able to update with VII Plus Loader.

True, too. For now. But maybe we'll find a way to update 415. It's not impossible.

This is 405 vcds v2 can update by VII Plus Loader

vcds hex v2 pcb-006.jpg

**badrax** · 21st January, 2021, 10:57 AM

Originally Posted by flyfvdi

all 405 vcds v2 can update by VII Plus Loader

This one cant

Sent from my iPhone using Tapatalk

**kaalis** · 21st January, 2021, 01:25 PM

Just got this from obd2ct. FW updated.

Various ecu connections:
CAN ok
K1 ok
K2 does't work.

Originally Posted by flyfvdi

Already fixed, use VIIPlusLoader-08.021.01-EN-Installer, update it

That didn't help either. Tried 20.12.0.0, 20.12.0.1 in combination with various viiplusloader.

Sent from my VOG-L29 using Tapatalk

**bendzji** · 21st January, 2021, 03:07 PM

I have similar problem. I'm in contact with fly and someone from enginneering staff - they are trying to find a solution.

What car are trying to connect so that k2 doesn't work? A4 b6 and a6 c5 after 2002?

**kaalis** · 21st January, 2021, 06:08 PM

Doesn't really matter: A4 B5-B6-B7 and A6C5 various modules which sit on K2.

02 trans K1 ok
08 hvac K2 FAIL
15 airbags K1 ok
16 steering K1 ok
25 immo K1 ok
34 level control K1 ok
35 central locks K2 FAIL
45 inter monitor K2 FAIL
55 headlight range K2 FAIL

**flyfvdi** · 22nd January, 2021, 04:08 AM

Originally Posted by kaalis

Just got this from obd2ct. FW updated.

Various ecu connections:
CAN ok
K1 ok
K2 does't work.

That didn't help either. Tried 20.12.0.0, 20.12.0.1 in combination with various viiplusloader.

Sent from my VOG-L29 using Tapatalk

please contact vcds v2 405 factory technical support engineer