Question about Motorcycles
Greg Mahin is our Fixya expert and HD Dealer but I haven't seen him this week. It is a known issue. I found this
VIN ERR can occur at start up for a variety of reasons. Often when the bike is doing a hot start.
Ensure the battery is in good condition.
Also that the positive cable and negative battery cable is clean and tight at both ends.
Depending on what set up you have MAP/ECM wise, check that your automatic compression releases are set to the On position.
There is a new standard calibration available to stock 110" model bikes related to just this issue, however I think your model is a 103" so not sure if that has an option to be remapped.
The general idea of the new map is to allow for those first couple of turns of the engine to be easier by opening the ACRs as soon as the ignition is turned on and maintaining that position for approximately 10 seconds at which point they'll close regardless of whether the start button is pressed to avoid damaging the driver coils at which point another OFF/ON cycle is required to open them again. This creates less stress for the battery which if it falls below a certain voltage whilst starting will display VIN ERR on the speedometer.
The previous maps and likely what is on your bike only opens the ACRs when the start button is pressed which doesn't provide a time frame sufficient for them to do their job in certain situations.
As aggravating as it is, the VIN ERR displaying isn't going to harm your bike but you will occasionally experience more difficult starting like that feeling that the bike is barely turning over.
Not really solved your issue but it might be worth speaking to your dealer and seeing if you have the option of an updated map.
and here in relation to your Fat Bob
V INERR code, bike stalls when hot. Help please? Details ...
www.reddit.com > Harley > comments > balv17 > v_inerr_code_bike... Anyone come across the V INNER code? : Harley - Reddit
Jun. 25, 2017
Fatbob 2015 couldnot restart when engine too hot : Harley
Jan. 8, 2017
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2014 Dyna Fat Bob Issues - Harley Davidson Forums
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