U111200 - Function limitation due to implausible message, stopping Cruiser control

[jvoelcker]

I had the ECM out of my 2012 3.0 Allroad a couple of months back and since then the Cruise Control hasn't been working and I have been getting an error 'U111200 - Function limitation due to implausible message '.

Googling away with the error I found someone else with the same issue and they found that driving with their OBDEleven dongle plugged in enabled the error to be cleared and for the cruise control to work, however as soon as they unplug the dongle the error would return and cruise control would stop.

During their various attempts to resolve the problem, one suggestion was to check the main connections to the ECM, which they did and that cured the problem for them, they no longer needed the dongle plugged in.

I had exactly the same issue, the error could be cleared down and then with the dongle plugged in the cruise control would work fine and no errors. If didn't seem to matter what dongle was plugged in either.

The error started after the ECM had been pulled out, so I am assuming that it is a connection issue, but am not sure where to start.

I have tried unplugging the ECM again, using contact cleaner on the terminals but this just seems to have made the issue more permanent now so I can't clear it down.

Here is scan data from OBDEleven for the code:-
01 Engine

System description: 3.0TDI EDC17
Software number: 4G0907311E
Software version: 0001
Hardware number: 4G0907401
Hardware version: H37
ODX name: EV_ECM30TDI0114G0907311E
ODX version: 001001
Long coding: 32254012052609020000

Trouble codes:
U111200 - Function limitation due to implausible message
static
Date: 2025-08-17 19:03:49
Mileage: 265034 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 779.00 1/min
Normed load value: 14.5 %
Vehicle speed: 0 km/h
Coolant temperature: 72 °C
Intake air temperature: 39 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.320 V
Dynamic environmental data: 209628108943108BEC108C00108DFF1663000012D50000108E 01

And here is similar from VCDS:-
4482 - Function Restriction due to Implausible Message(s)
U1112 00 [00100111] - -
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 264798 km
Date: 2025.08.12
Time: 18:16:35


Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 91 °C
Intake air temperature: 50 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.280 V
Unlearning counter according OBD: 40
Cruise Control System (CCS): switch position-Bits 0-7: 67
Cruise Control System (CCS): status-Bits 0-7: 44
Cruise control switch-off: irreversible-Bits 0-7: 255
Cruise control switch-off: reversible-Bits 0-7: 255
Cruise Control System: specified speed: 0.00 km/h
Engine control module reset status-Bits 0-7: 0
Engine control module reset status-Bits 0-7: 0
Cruise control switch-off: irreversible w. brake intervention-Bits 0-7: 0

Where can I go to get hold of the wiring diagram for the ECM terminals?

Any other suggestions?

Many thanks

[Crasher]

You can download everything that Audi publish for the car from erWin for €7 an hour. I recommend an erWin virgin pays the €30 day rate so they can get used to how it works and take their time. You will need a print to pdf function.

[jvoelcker]

Hi,

Thanks, so similar to the Toyota Techdoc system.

Have you come across similar issues?

[jvoelcker]

Is there a diagnostics section on Erwin when you can check/cross reference error codes? Toyota have very detailed diagnostic steps

[Crasher]

To do VAG diagnostics, you use the erWin system to buy tokens that allow you access to the elSaPro system AKA ODIS. The catch is the interface is £1300 and gaining security clearance and Group Retail Portal membership is arduous and complex plus you need to be a registered VAG repairer and have a VAT number.

[jvoelcker]

Ok, so there is no way to just look up diagnostic data? With Toyota you get diagnostic steps using either a paper clip or a computer and then list of error codes, symptoms cross referenced with error codes and then detailed disgnostic steps. The paperclip/flash code system still works with even the very latest models. Additionally each disgnostic section gives ECU terminal details and circuit diagrams for each section.

The Erwin system doesn't exactly make it is easy.

[Crasher]

All you can do is read the codes, preferably with VCDS, and then look them up. VAG went from paper codes to fully computerised starting around 2002 under what they call Guided Fault Finding is ODIS, not easy even when you have full ODIS access as it is €10 an hour to use it and is THE worst piece of software I have ever had the misfortune to use, slow, clunky and not intuitive.

[jvoelcker]

So can I lookup the codes via Erwin?

I have tried searching on the code U111200 given but don't get any results back.

[Crasher]

No, only by being logged into ODIS. I hate these U1112 and U1122 codes, they are so vague and often in ODIS it just asks if this can be attributed to a customer complaint and then says basically ignore it. These messing messages codes are becoming a big problem with the Golf 7 and often it is the radar sensor.