Quote:
Originally Posted by Overboost
I have the same KMBI_E38.C12 cluster in mine. I opened my TRC file from my cluster and from my reading to get an accurate speed value just change the settings in the 4 addresses listed to the Japanese variant in NCS Expert.
The two bytes for speedo calibration and scale length should be at addresses 00B8, 00B9 are 11, 33. Changed to 09, 3C to select Japanese (accurate) speedometer.
The complemented data that should be at addresses 00EC, 00ED are EE, CC. Changed to F6, C3. (Also Japanese listing)
Japan is the one country BMW left as precise from all my reading.
That being said, I really have no desire to change mine, I kinda need the buffer. I am always targeting +8MPH over the posted speed limit and that puts me at +5MPH over.
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Thanks
Overboost. This is the same info I've been reading but it seems it doesn't apply to my car. You've seen the values I've posted for those four data fields and the settings that control these AREN'T in my current trace file. At all. They are all listed in NCSDummy but no value is selected and everything is greyed out...
I've also read that just changing these four hex values (assuming they apply to your car) while achieving the desired result also results in an IKE checksum mis-match, so I think we would need to locate and adjust the checksum value if changing the hex data values. Maybe that's only an issue if you change the raw hex via BMW Scanner rather than changing the value via NCS Expert/NCSDummy.
I'm going to get some GPS speed readings later on today so I can verify what my car is actually doing. Like you, I'm not actually worried about changing this - I just want to figure out how too - for those folk out there that DO want to change it!
