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Post by bajwha on Nov 13, 2022 14:02:22 GMT
Can any one please tell me what is this code does
my car detail are
VIN: WVWZZZAUZHW145363
Car: Volkswagen Golf
Year: 2017
Body type: 5-dr hatchback
Engine: CXXB
Need help with the following. Can someone please explain what is this code what this does
Long coding
Control unit: 17 Dashboard
Old value:
27A41A002780260001886B011400000000000000
New value:
67F41A806784260001886B015400000000000000
Thanks
regards
Javed
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Post by vwjap on Nov 13, 2022 14:43:38 GMT
That’s the long code string
Now all digital switches are in binary, but binary is long and can easily get misread, so it’s written in hex, hex is 2 digits long as as it uses 0-9 and A-F is much easier to read
Now a byte is 8 bits, which equates to 8 switches (0 or 1), so your code actually looks like this
All start on 0 not 1
27 A4 1A 00 27 …….
Now the 27 is byte 00 has 8 switches (binary 00011011)
Switch 0 is clocks lit during daytime
Switch 1 and 2 is needle illumination (ignition on and off
Switch 3 and 4 is seat belt warning
Switch 5 is right hand drive
Switch 6 is speed warning at 120kph
And switch 7 is not used
Now the different switches can be added together to make more options available under one question, so you could have 4 answers using 2 switches (like 00=0 01 =1 10=2 11=3)
Now you have 20 bytes and that’s just one of them (now remember they start at 00 so it’s 00-19)
Hope that helps
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Post by dv52 (Australia) on Nov 13, 2022 22:17:56 GMT
bajwha : Further to the excellent response provided by my colleague - here is how your old/new long-code values look when re-arranged into a side-by-side comparison: OLD NEW
Byte Hex Binary Hex Binary
00 27 00100111 67 01100111
01 A4 10100100 F4 11110100
02 1A 00011010 1A 00011010
03 00 00000000 80 10000000
04 27 00100111 67 01100111
05 80 10000000 84 10000100
06 26 00100110 26 00100110
07 00 00000000 00 00000000
08 01 00000001 01 00000001
09 88 10001000 88 10001000
10 6B 01101011 6B 01101011
11 01 00000001 01 00000001
12 14 00010100 54 01010100
13 00 00000000 00 00000000
14 00 00000000 00 00000000
15 00 00000000 00 00000000
16 00 00000000 00 00000000
17 00 00000000 00 00000000
18 00 00000000 00 00000000
19 00 00000000 00 00000000
If you have understood vwjap words above, the terms in my table will make sense. The only additional point that I would add to the vwjap explanation is that the Bit-sequence (i.e. the Binary number) in my table is read from right-to-left. This means that Bit 0 is the right-most digit and Bit 7 is the left-most digit.
So, my immediate observation is that there has been many changes made to the original long-code string on the Dashboard module!! Of course it's entirely possible that ALL these changes are kosher - but I wonder if this car really has had so many modifications made to its original factory build (this assumes that the "old value" in your post is the original factory-build long-code string)?
As an example of my skepticism - notice Byte 04. The change that has been made to this Byte is that Bit 6 has been set. Bit 6 is the software switch that tells the hex17 module that Lane Assist is active. Does this car have this feature as retrofitted?
Also, notice Byte 12 - the change is Bit 6 has been set. Does this car have Blind Spot Monitor equipment installed as a retrofit?
Don
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Post by bajwha on Nov 14, 2022 8:54:50 GMT
Thanks a lot both
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