Sunday, 8-December-2019
Renault Scenic odometer correction - edit 93c56 EEPROM
EN
In that topic will explain how you can edit in case you need your Scenic 2004 odometer.
You can, of course use 3th party service, or some odometer correction software, but if you have some skills, EEPROM programmer and will to play with it, then here is some exercise:
As you see, there are 4 groups representing the exact same 6 bytes. Have no idea why they must 4 but anyway here it is how you can manipulate them:
(that is after you remove the chip from the dash and / or read it content via programmer already)
94 BF 6B 40 00 02 <- that`s the group in the picture and it represent 158 528km
- open any calculator software that support HEX to DEC conversion and bit-wise operation.
- 158528 > converted to HEX > 00 02 6B 40
- then in that number, 2 bytes switch places > 6B 40 00 02
- now we take first part 6B and do the bitwise XOR with it > 6B xor FF > 94
- second part > 40 > and make > 40 xor FF > BF
Now you have ready number to store of 94 BF 6B 40 00 02 Or that`s exactly what you see..
Lets presume you have: 98650km then what will come?:
- DEC2HEX > 00 01 81 5A (the first three zeroes are omitted when shown in calculator, just write them manually)
- swap 81 and 5A > 81 5A 00 01
- 81 xor FF > 7E
- 5A xor FF > A5
Now, we are ready to write: 7E A5 81 5A 00 01
Marked with red letters is the VIN number.
Can`t say for sure if that way is with CRC or not.. but it work.
In case you wish to try - good luck!
Add comment
Fill out the form below to add your own comments
