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How do you chech Checksum?
Posted: Thu Mar 08, 2018 8:26 pm
by bomj911
HI i changed my rev limit on 93 318is with 990 ecu with Tunerpro, how do i go about checking Checksum now is there a different program that dose it? or there is a way to do it with TunerPro.
Thanks
Posted: Fri Mar 09, 2018 4:42 am
by Hairyscreech
How did you change the Rev limiter?
If you used an XDF downloaded from the main website then most of them have the correct checksum calculation built in and tunerpro will recalculate and patch the BIN when you save it. (So save before an upload or you might find the car won't start at the worst possible time, guess how I know.
)
Otherwise the checksum will be similar to all the other Motronic ECUs and you will be able to take a look at the XDFs for the other ECUs in the same Mx.x series for information.
Generally it is a sum of the data in the map area.
Most of the Motronic ECUs also flag an error code into memory if the checksum is incorrect, if you have a code scanner you can check for this code to see if there is any issue with the checksum.