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T4 Control Unit Basic Settings

 
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Tobi12345
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Post26-09-2008, 18:23    Subject: T4 Control Unit Basic Settings Quote

Good evening everyone!

I have a question for you all regarding the MSG (Message Sequence Number) of a T4 MKB AUF.

It's a 102 hp 5-cylinder TDI, but you probably already know that from the engine code.

Okay, here's the specific question: If I go to the basic settings for EGR (Exhaust Gas Recirculation) in the measurement data block 3 of the engine control unit (ECU), I usually see that the engine speed increases to about 1200-1300 RPM, and then, in this case, the EGR is alternately active and inactive. Could it be that this doesn't always happen, or not with every ECU?
In a friend's case, this isn't the issue, and the engine then runs very unevenly.
If the engine speed isn't increasing as it should, what could be the cause?

Thank you for your help.

Best regards, Tobi.
A6 Avant 3,0TDI Tiptronic Bj. 02/2008


Translated on 15-07-2026, 22:02.
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Tobi12345
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Post27-09-2008, 14:28    Subject: T4 Control Unit Basic Settings Quote

Perhaps I can rephrase the question: Can anyone tell me if a VW TDI is...

Measurement block: Basic settings are similar to those of a PD TDI, with the engine speed being automatically adjusted.

approximately raises the speed to 1200-1300 RPM?

We would be very grateful if you could provide us with some information; so far, we have only...

"Physicians were involved in the diagnosis."

Best regards, Tobi.
A6 Avant 3,0TDI Tiptronic Bj. 02/2008


Translated on 15-07-2026, 22:04.
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dieselschrauber
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2018 Volkswagen T6 Consumption


Post27-09-2008, 14:44    Subject: T4 Control Unit Basic Settings Quote

Tobi12345 wrote:
Perhaps phrased differently, can someone tell me if a VP TDI is in the...

Measurement block: Basic settings are similar to those of a PD TDI, with the engine speed being automatically adjusted.

approximately raises the speed to 1200-1300 RPM?

We would be very grateful if you could provide us with some information; so far, we have only...

"Physicians were involved in the diagnosis."

Best regards, Tobi

It depends on the control unit and the sensor block icon_smile.gif.


Translated on 15-07-2026, 22:05.
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Tobi12345
Blaumann
Blaumann


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Posts: 151
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Location: nähe Hamburg

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Post27-09-2008, 15:29    Subject: T4 Control Unit Basic Settings Quote

Thank you for the answer, Rainer.

I noticed it in measurement block 3 and 11 because those were the ones I had previously checked.

I have.

In measurement block 3, during the basic setting, the value was observed with the EGR system deactivated and at 730 RPM.

He was shaking quite violently, as if he were about to come out.

It didn't seem quite normal to me, but as I said, I also have absolutely no experience in this area.

Regarding the VPs (Vice Presidents).

I would be grateful for any exchange of experiences or tips.

Best regards, Tobi.
A6 Avant 3,0TDI Tiptronic Bj. 02/2008


Translated on 15-07-2026, 22:07.
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