guys, according to me, here we are losing too much on the theoretical discourses.
guys, according to me, here we are losing too much on the theoretical discourses.
the micro reads from the flash the chk who wants to, in principle, the calculation of the chk worked in this way:the sum of all the values of the memory gave, for example, as a result 3FA, this value was written in an area of memory that the micro was going to see, and reading all the memory was the sum, checking that the result was the desired one, so usually if you got up in the curve of gasoline, and they came to value 4FC of chk was to lower an area of the eprom that is not used(it was usually a area all to FF)until the cel came 3FA, on the ecu vag with 2 plcc, the control unit read from the memory only at power on, so much so that when I used the emulator with the first software that does not correct the chk in real-time finch? the car was in motion you could do all the modifications cher you wanted to but if spegnevi the car to get the bike you had to force reload the in-memory maps with the value of chk is correct, then they started to implement control of the chk periodic every certain period of time and simple chk(the miserable sum) is processed with different algorithms.
I, however, on the new beetle with edc15p+ I have tried only the 24c04 with the program vagimmo edc15 and I had no problems, however, are aware that on some ecu vag you have to render both why? functions, on the other remains the light on, on the other hand you don't enter the pi? in diagnosis, I have had cu.. and ? game without any light and I can even enter the diagnosis.
and these are the things that I don't understand this "work" (with the quotation marks, for me as they are at the beginning). not c, and a logic operation consistent.. example: the machine and this, the ecu, and this.... it makes total with this procedure, and in part with other quest.... at the end from the ecu to the ecu the procedure can change, some of the light to other flashes some do not enter diagnosis.... some just only do the e2p other flash.... then from eci to the ecu something safe and that changesOriginally Written by chicco
ok there and I finally understood how it is done the fix, thank you very much you were very clear beanin fact, he's also right vic saying that we are going to be too theoretical, I ask that you perdinarmi but I hate to put a hand to a thing that I know little about or don't understand, and until now I did, unfortunately, so... in fact, I miss a lot of the theoretical part on the electronic digital (not analog, I was electrotechnical years ago and am fond of the low frequency tube amps for the accuracy
then andrew that we were we take stock of the situation? if you want I can help you, I told you that I have a ecu vag 1.4 edc 15p and then I also have a obdii cable that manages to put off the immo saddles edc15p or even clonarle
you have sent thee mp l have you read?
with regard to the obdii cable is only edc15?
But the backup memory of the ecu ori you?The eeprom ? was read before passing it on to the other ecu otherwise now you can find all corrupted, the other ecus may having written over something.
I made 3 backup first with the serial, then after that I open it I have backed up both of the e2p that of the flash, I also have the backup of the e2p of the other 2 ecu try. I have read all of the tour with gq
then according to me you should not have problems to restore to another ecu, the one you found is fine for me.
Write permission
Quote