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Old 12-22-2018, 10:13 PM
oldskewel oldskewel is offline
Join Date: Nov 2014
Location: SF Bay Area
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Originally Posted by Overboost View Post
... We are simply changing the hexadecimal values ...
Yes, so that's my basic dumb question ... if you change one of the hex values, isn't that something that the checksum checks? And if so, wouldn't the checksum value for that line change? Handled automatically somehow?

No doubts about the needle angles and old vs. new temperatures you want programmed in there. Just the checksum thing does not make sense to me.

I had thought that maybe if the changed parameters were all symmetric changes, so some went up by the same amount that others went down, the required checksum changes might self-cancel. But it does not look like that is the case with the numbers here.
2001 X5 3.0i, 190k miles, AT, owned since 2014
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