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Hi 

There seems to be some worsening, intermittent fault with the Lane B light on my Foxbat with 400 hrs. The Lane B (or both lights) light is usually on when taxiing. When I do a run up at 4000 rpm, it usually goes off. For a while, sometimes it did not go off, but would go off when I restarted the engine. More recently, it goes off at 4000 rpm during runup, but comes back on at lower revs. Neither of the Lane indicators on the Dynon Skyview show a fault with either lane. 

Is it okay to fly if the lane light is steady of if the Dynon does not show a Lane error? Do the Dynon lane lights mean the same thing as the Lane lights on the instrument panel? 

I have read that you need a dongle to get an error log, but you can read what the current errors in on the Dynon screen in a place in the Engine menu. Does that mean that the Dynon logs the most recent error, or does the error have to be occurring withe the engine running to read the error on the Dynon? If the Dynon can read errors, how come the Dynon Lane lights do not register the same error that is on the lights on the instrument panel?  

Another thing, often after starting, all the engine instruments are not reading anything but have red 'x's through them. That is fixed by flicking the Lane B on and off. What is happening there? 

Thank you so much for your information!

  • Re: Lane B Light On More and More

    by » 4 years ago


    The Dynon may be a nice back-up for the ECU errors but the question arises as to what information did the Dynon program engineers tap off from the CPU CAN buss. By whatever means, you should apply the BUDS diagnostic program to the unit. In other words buy, borrow, or hire a level 2 or three dongle and use the BUDS reader program to sort out the problem, or lacking access to the reader program, send the data extracted from the CPU logs to a qualified Rotax maintenance technician or to the  warranty center for your area of the world. I would check the B lane HIC connector for properly inserted pins including internal shorts. The HIC connectors are a little tricky to install the pins properly. The original install manual had a certain method for installing the pins but a later version of the manual displayed a different, and in my opinion an easier, more reliable method for the installation. Then there is the question of how many times have the CPU wiring harness connectors be disconnected/ reconnected. There is a limit to the number of cycles allowed. I would find it unusual to exceed the number.  for example, I made/remade the connectors twice during original installation and have not touched them since (280 engine hours). As I recall, without looking it up the number is in the "20 cycle range".


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