checksum on 24C02

[defected]

Hi guys.

I know you will just make fun of me but i cant figur it out how to make chcecksum!

_Using Hexprobe.Hex.Calculator.4.22 and post from

We first work out string1
Click the dec radiobox and type in the new km you want (Im going to use 121700km) Now click the hex radio button and this will give you the value string2 (0001DB64)
Now click xor FFFFFFFF and this will give you string1 (FFFE249B)

Now we have to reverse the checksum.
Clear the calc, click the dec radiobutton and type in the original km (261036km) /100 = (2610) then click the hex radiobutton (it should now say 0A32). Now click xor and type in the original checksum (8BE7) will give you the 0km checksum (81D5).

Now we have the 0km checksum we can calculate the new one.
Click the dec radiobox and type in the new km you want (121700km) /100 = (1217) then click the hex radiobutton (it should now say 04C1). Now click xor and type the 0km checksum (81D5) = New checksum (8514)

Now we have all the values we need to modify the dump to 121700km.
String1 = FFFE249B
String2 = 0001DB64
Checksum = 8514

and still this dosent work for me!

Please can somone help me?

Thank you.

[clusters]

This won't work for your Yamaha, that algorithm is for an Audi A3. Not all 24c02 algorithms are the same, depends on the vehicle and even on the same car it can change between years.