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Author Topic: Audi A6 4B Allroad 2.5 TDI swap to 1.9 TDI, need help DTC P1841 in TCU  (Read 608 times)
mj12345
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Hello,

Audi A6 4B Allroad 2.5 TDI EDC15VM swap to 1.9 TDI EDC15P.

ECU changed from 4Z7907401B_366613 to 038906019KD_366501.
TCU original Allroad 4Z7927156H

Now the problem, when i start the car there comes the DTC "P1841 Motor/Getriebesteuergerät Varianten passen nicht zusammen" in TCU and limp mode.

When i flash the software of Passat 1.9 TDI 4 Motion 3B0927156S the car starts normal,
but when i drive to the third gear there comes DTC P1744, P0733 and P0811.

Now two ideas to solve the problem:

- Copy the variant coding from edc15vm to edc15p or
- Copy the ratio of the gears of the tcu from allroad the passat software

I have a OLS300 connected to the tcu but i need a tool to correct the checks of the 5hp19 to try some tests.

Thanky you for help.



« Last Edit: June 15, 2022, 12:05:06 AM by mj12345 » Logged
mj12345
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Here all files that i have read.
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BlackT
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Yust copy values for CAN that ECU send to gearbox. Don't know how they names are in EDC

Motormoment, ecu variant coding, can coding. There is topic for 6hp conversion on 2.7 in this forum so look up

Offtopic: How will that little TDI pull a 2 Ton allroad?
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Blazius
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Offtopic: How will that little TDI pull a 2 Ton allroad?

Not well Cheesy
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mj12345
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Yust copy values for CAN that ECU send to gearbox. Don't know how they names are in EDC

Motormoment, ecu variant coding, can coding. There is topic for 6hp conversion on 2.7 in this forum so look up

Offtopic: How will that little TDI pull a 2 Ton allroad?

In both files i cant find FMOTC, CWGC, CANVERS..

Any other ideas ?
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BlackT
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In both files i cant find FMOTC, CWGC, CANVERS..

Any other ideas ?
Maybe they have other names in EDC. Take a look in FR
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