So, this weekend I installed my newly acquired MM3 as supplied by @
DRD.
When first powering up the unit, I was expecting a firmware update (per other threads and videos I've seen), but I don't think that happened.
I'm presuming that the update was done prior to me receiving?
There was some sort of "Uxxxx" error at first, but I was able to continue on, agree to terms, use the VIN, etc.
Then, I retrieved the stock file which was so fast I almost wondered if it was even retrieved. I have since copied the file (approx 284b, I think) to my PC. So, I guess that's right?
After retrieving the stock file, I then loaded the custom tune, and all has been well during the 4-5 times I've driven the truck.
If all seems OK now, and I'm not getting any errors, should I just not even worry about that initial error? I seem to have the latest firmware with the "switch" function, etc...
Lastly, now that I can see the ECM voltage from start-up, is it normal for the voltage to hover around 12 volts for maybe 10-15 seconds and then jump to 14ish volts for the rest of the trip?
Just curious as to why it's not 14 from the start - does it take the ECM that long to verify proper voltage before applying or something?
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