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Odometer Algorithms Manual Calculations Explained For Studies
13-03-2019, 09:37 AM,
Post: #31
WHyundai  RE: Odometer Algorithms Explained For Studies
Hyundai Grand I10 eeprom 24c16  ver : 01 

work  Algorithm Visteon (const 128) 

Car type: Hyundai i10  Visteon - 24c08 - 2009 year
The mileage is stored in the next lines:
03A0: xx xx xx xx xx xx xx xx 24 CA xx xx 24 CA xx xx
03B0: 24 CA xx xx 24 CA xx xx 24 CA xx xx xx xx xx xx
where the next bytes:
24 CA - is a mileage

7C0: FF FF FF 17 12 FF C4 17 12 FF 40 17 12 FF C1 17
7D0: 12 FF C2 17 12 FF 43 00 01 02 03 04 05 06 07 08
7E0: 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18
7F0: 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 F4 F4 F4 F4




17 12 =47300 km
C4=!
40=!
C1=!
C2=!
43=!

Members can discuss how this car is calculated

Hyundai Grand I10 eeprom 24c16  ver : 02


Attached Files Thumbnail(s)
       
47300 km.rar
File Type: .rar
Downloaded: 18 times
Size: 896 bytes

10 km.rar
File Type: .rar
Downloaded: 17 times
Size: 893 bytes

6039 km.rar
File Type: .rar
Downloaded: 13 times
Size: 882 bytes

1000 km.rar
File Type: .rar
Downloaded: 13 times
Size: 857 bytes


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06-04-2019, 14:01 PM,
Post: #32
LFord  RE: Odometer Algorithms Explained For Studies
My contribution for Ford F150/250/350/450 24C32 years 2015-16-17 around


Engine and idle hours:

Line : 0ee0: 00 00 02 5F 00 00 00 81

Where 00 00 02 5F = engine hours simple hex to dec
Where 00 00 00 81 = idle hours simple hex to dec
Take windows calculator in scientific option and use ``hex`` and ``dec``

KM:

Where 9c9c at begin of line 0F80  = take tachosoft Ford F150 2009 24C16 for calculate


OR maybe someone can explain calculate manual ???




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hope it can help someone
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08-05-2019, 23:53 PM,
Post: #33
RE: Odometer Algorithms Explained For Studies
Algo to calculate km in abs scenic 3

adresse 10E to 115

exemple : B6 6A 1B FF B6 6A 1B FF

B6 6A 1B FF is mileage repeat 2 time.

FF FF FF FF XOR B6 6A 1B FF = 4995E400 = 1234560000 (hexa in decimal)
divided result to 10.000 = 123456 km
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08-06-2019, 07:58 AM,
Post: #34
RE: Odometer Algorithms Explained For Studies
chatenay ch26 95020

example : 1D C3 06 00 E2 3C F9 EST LE KILO ET LE CS ( 1D C3 06 KILO ET E2 3C F9 CS )


Repeat 4 times :
- 0 x 00 to 0 x 06
- 0 x 0C to 0 x 0E
- 0 x 20 to 0 x 26
- 0 x 60 to 0 x 66


1D C3 06 READ UPSIDE DOWN = 44316 KM

1D C3 06 = 06 C3 1D
2 CONVERT TO DECIMAL = 443160 km
3 SPLIT BY 10 =  44316 KM


fOR CALCUL CS :

FF XOR 1D = E2
FF XOR C3 = 3C
FF XOR 06 = F9
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15-09-2019, 23:05 PM,
Post: #35
RE: Odometer Algorithms Manual Calculations Explained For Studies
Haven't posted here for a while, so here's a new one.   

Mercedes Sprinter dash with 95640

Calculated in Km X 1000
For miles, X 1609  
Offset can vary, have seen it on line 02a0, 02b0, 02c0
145000 Km

Mileage string 4 groups of 3 bytes , first byte in each group is part of mileage string, the last two are CS bytes

02a0:  xx xx xx xx bf b0 4f 79   76 89 5b 54 ab f7 f8 07

Broken into 4 groups:

bf b0 4f  bf xor last nibble = b0 xor byte = 4f
79 76 89  79 xor last nibble = 76 xor byte = 89
5b 54 ab  5b xor last nibble = 54 xor byte = ab
f7 f8 07  f7 xor last nibble = f8 xor byte = 07


First byte of each group:  bf795bf7 inverted = f75b79bf xor with ffffffff = 8A48640 decimal = 145000.000 Km

Cheers biggrin

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23-09-2019, 03:00 AM, (This post was last modified: 23-09-2019, 13:32 PM by Clusters.)
Post: #36
RE: Odometer Algorithms Manual Calculations Explained For Studies
Here is a brand new one, and much easier if you use a tool to correct it, but for those that must know how it works or want to calculate manually....

2018 Toyota Camry with Fujitsu processor, but the mileage is in 93c66 tssop and Spansion processor.  Changing just the eeprom will not work. Sample Spansion file in the attachment and this refers to that file.

It's up to you to find how to read this, please don't ask here.  Questions and requests will be deleted.

Start of the file gives us the constant: 

0040:  01 00 49 0d 00 00 00  Constant is 49 0d - 01 00 = 48 0d

Mileage string from 03bd0 (third instance):  04 00 c2 0d 63 12 01 00  aa aa aa aa aa aa aa aa

63 12 01 00 inverted = 11263 Km (7000 mi)

CS is c2 0d  you add all values on the line except the CS

04 + 00 + 63 + 12 + 01 + 00 = 7a

Then add to the constant to get the CS 48 0d+ 7a =  c2 0d

When correcting these only correct the mileage string and calculate the CS for each line.

This file happens to only have 3 instances of the mileage, but in other files there could be hundreds.  rolling

Have fun.


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09-11-2019, 09:20 AM,
Post: #37
WHyundai  RE: Odometer Algorithms Manual Calculations Explained For Studies
Hyundai Grand I10  ver 01 
algo ford calc . manually....

orignal km is : 11781  
1D74  X 32  =  5C0A8  to decimal   =   377000 / 32 = 11781 km

11781 km X  32 = 377000 to Hex 5c0a8 / 32 = 1D74 

Here is CS !

***********************************************************
Hyundai Grand I10  ver 02 

algo ford calc . manually....

orignal km is : 83888

28F6  X 32  =  147B0 to decimal   =   83888 km


83888 km  to Hex = 147B0 / 32 = 28F6

****************************************************************
Hyundai Grand I10  ver 03 

algo ford calc . manually....



orignal km is : 92573

E76F X 32  =  2D33AE  to decimal   = 2962350 / 32 = 92573 km


92573 km x 32 = 2962350 to Hex = 2D33AE  / 32 = E76F 

here is CS !
****************************************************************
new algo ford Hyundai i10 9S12HY64 

Go to String 0 x 47A Show 2 Bit


73 52 = 7352 x 8 = 039A90 TO DESIMAL = 236176 km
Constante :296 .

New Value =
105000 = 105000 to Hex decimal = 019A28 / 8 = 3345
Remplace all value

Remplace  old value  (7352) To new Value (3345) 


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12-11-2019, 17:47 PM,
Post: #38
RE: Odometer Algorithms Manual Calculations Explained For Studies
Landini tractor 24c16

4000 hours

0020:  xx xx xx xx xx xx xx xx  00 03 a9 80 b2 de 00 03
0030:  a9 80 b2 de 00 03 a9 80  b2 de xx xx xx xx xx xx

00 03 a9 80 = 240000/60 = 4000 hours

b2 is a constant in all files

CS is bytes added, ignore overflow  00 + 03 + a9 + 80 + b2 = 1de = de

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07-12-2019, 23:59 PM,
Post: #39
KOpel  RE: Odometer Algorithms Manual Calculations Explained For Studies
My little discovery...


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01-01-2020, 08:16 AM,
Post: #40
RE: Odometer Algorithms Manual Calculations Explained For Studies
Great wall Volex C30 year 2013 Micro 9S12HY48

Orignal Value : 304543 km 

304543 km to Hex   04A5XX 

Serche in the hex desimal : 04A5 



new Value : 150000 km 

150000 km To Hex   0249F0 

Remplace All Value  04A5XX to new Value 0249F0  


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