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Hey guys,

Anyone know how to log TCU currents or anything like it via vag com?

Had a solenoid code and replaced all the solenoids and still have the code. Want to try everything before just buying another TCU.

Thank you!

Logs measuring blocks 005 and 006 along with group 001 to get the input rpms and current gear.

Remind me what your error codes are?

Shoppinit wrote: ↑

Mon Nov 09, 2020 3:58 pm

Logs measuring blocks 005 and 006 along with group 001 to get the input rpms and current gear.

Remind me what your error codes are?

Thank you sir.

So many fault codes that could all be explained by a bad 16-pin connector at the gear box. Or a bad TCU.

How do you feel about measuring resistance?

I measured the resistance on the harness at the front that’s known to corrode because of the seals
And it was fine. Used contact cleaner and reconnected. I haven’t been able to find a spare TCU to try out I live in Canada and there’s not many of these here

Plug it back in and unplug from the TCU to check the resistances.

Measure between pins:

52 & 53
33 & 52
33 & 34
32 & 52
32 & 34

Ignition off.

Shoppinit wrote: ↑

Mon Nov 09, 2020 10:49 pm

Plug it back in and unplug from the TCU to check the resistances.

Thank you very much I’ll try that tonight.
Testing the pins attached to the harness that you pull out of the TCU correct?

Yup.

52 & 53 nothing
33 & 52 28 ohms
33 & 34 nothing
32 & 52 27.7 ohms
32 & 34 nothing


Couldn’t do the logs because I can’t get it out of limp mode right now even after clearing codes etc.

When you say nothing do you mean zero or infinity?

Shoppinit wrote: ↑

Tue Nov 10, 2020 6:01 pm

When you say nothing do you mean zero or infinity?

It says “1.” on the screen when it’s on but you’re not using it and when I test between those three pins, the screen doesn’t change

OK. Then infinity.

So what you measured is all as I would expect it to be.

That would suggest it's not the 16 pin connector and not the solenoids. So maybe a bad TCU.

Where in Canada are you?

Shoppinit wrote: ↑

Tue Nov 10, 2020 7:01 pm

OK. Then infinity.

So what you measured is all as I would expect it to be.

That would suggest it's not the 16 pin connector and not the solenoids. So maybe a bad TCU.

Where in Canada are you?

Niagara Falls Ontario.
My tuner said he would be able to take apart the TCU and diagnose and fix if he can for around C$400 although I don’t really see a very good track record when people Muck around with the tcu

You could try calling Xemodex to see if they can do anything. They’re in Ontario IIRC. I don’t know if they do anything on the RS6 TCU though.