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BUDS dongle ECU download error code messages reference

  • PaulHamilton
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1 week 5 days ago #19923 by PaulHamilton
Ok I had some lane lights come on and a bought a dongle and downloaded the errors.events. Warnings faults and failures. Where is the reference for all the error codes to troubleshoot/figure out what is happening?

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  • Neville
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1 week 5 days ago #19925 by Neville
you must attend the Rotax maintenance school to have access to the interpretation to the decoding of the down loaded data. Run the engine with the dongle pluged in and look at the health page. I had a lane light and the active heath page reported the number one cylinder EGT was defective.

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4 days 19 hours ago #19972 by PaulHamilton
Yes Neville I did fly with it live and no faults at the time. Pretty bad service policy to sell expensive dongles with no instructions on how to analyze/use it. Basically leaves me with no solution. I would think Rotax would like its customers to be able to service the engines in the field with a simple decoding/troubleshooting document. I was told by a Rotax service center there is no decoding document just trial and error in the field. Sadly this is overall pitiful support of the 912iS Rotax product. Knowing this I am starting to recommend people stick with the carb engines when making the decision of fuel injected or carbs.

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4 days 18 hours ago - 4 days 11 hours ago #19973 by Bill Hertzel
What error code are you seeing?

You may find Pages 8 and 9 of the attached PDF helpful.

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Last edit: 4 days 11 hours ago by Bill Hertzel.

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4 days 11 hours ago - 4 days 11 hours ago #19975 by PaulHamilton
Faults are shown in the attachment. First and second downloads.

First I had the Lane A light come on solid, two out of three flights. When this happened in flight I did a quick reset (Lane A) off and back on (typically within gliding distance of a safe landing area) that would clear it. Sometimes I had to do this twice in a flight. This could not go on and had to be diagnosed. From my first dongle download Bryan determined that the ignition coils might be at fault with the SPARKS MISSED "Failure" from cylinder 3/4 (first Download). He suggested I clean/tighten the electric connections on the ignition coils which I did. This helped greatly but did not completely solve the problem.

Now I get a blinking Lane A, one flight every four flights (improvement from solid Lane A two out of three flights). Big improvement but still not acceptable. So now I am trying to figure out the blinking lane A with the new error code analysis with the "second download" NEW circled Faults from the second download.

Again, I am VERY irritated with this dongle download lack of information from Rotax. This fault/data key should be in the maintenance manual just like all the other maintenance items.

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Last edit: 4 days 11 hours ago by PaulHamilton. Reason: had to many of the same attachment included in post

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4 days 10 hours ago - 4 days 10 hours ago #19976 by Bill Hertzel
I am not sure what more you would like to see. ???

I see faults all over the board that do not point to anything specific.
It looks like an electrical problem.
Is this engine more than 2 years old?
Was this engine involved in the Generator/Stator replacement Service Bulletin in 2016?
Were the Stators replaced?

This is a crazy batch of fault where it looks like it just about everything is going bad.
This brings my old troubleshooting mantra to mind.

"If it absolutely makes no sense, and it appears that Magic is at play, It is a Problem with the Grounds!".
Last edit: 4 days 10 hours ago by Bill Hertzel.

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3 days 16 hours ago #19978 by PaulHamilton
I get similar gobbely goop on another 912iS engine that I downloaded via dongle that is running like a top. Yes both engines have had all the required stater updates.

The simple point is that if we had a tool to understand/decode all the specific Rotax messages they designed into the ECU to pop up, then we could make an informed decision as to what is going on.

Knowing what the messages are would explain allot.
Which ones would cause a solid Lane light, which ones would cause flashing Lane lights. Which are typically startup or run up faults, such as doing a run up and switching the Lanes off and back on.

The maintenance/service procedures for the dongle need to be in the Rotax engine maintience/service documents.

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3 days 3 hours ago #19979 by Neville
The tool needed is the software titled BUDS log viewer software, On the Rotax site under ECU software is a list of which version is available for 3 types of operating systems. The listing states that training is required to obtain the appropriate software.

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3 days 27 minutes ago #19980 by PaulHamilton
Since all other maintenance/service procedures for rotax engine are in the Rotax engine maintenance/service documents to maintain the engine properly to ROTAX standards, why are the 912iS doggle maintience/service documents not provided? Why the secret? I do not understand. Rotax needs to change improve this policy it does not make sense. Every single procedure/process for installing/servicing and maintaining is in the rotax documents, why hold back needed information? Who at ROTAX can fix this? It is a much needed improvement in customer service.

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