Tachograph information

[54321]

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[dave11674]

depending on which vehicle ur doing mate
if your programming thru OBD then just give it a shot.

i read in some of my software somewhere certain vehicle had
tachometer & tachograph calibration

dave

[54321]

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[tachonow]

You must do km in tacho, but , this is digital card one and cant be done.
The only solution is to disable tacho from car then make odo as usual ezs=0 and dash desired.