LONG CODING

Thanks to DV52, Matthew, Admin and phantoma6 who started this all off.


Seen a number of people having a problem understanding the long coding and how to read the backups so added the following notes.

Firstly thanks to phantoma6 for the insight obdeleven.proboards.com/post/8896/quote/1238

So the change I am going to show you is to disable my rear fog light (just to show a simple change and how you can read it)

Enable indicator Rear fog
With this modification we can visualize in the box snitch when we put the rear lights.
1 - Module 09 - Electronic. Code (31347)
2 - Extended coding (Mode Bytes)
3 - Byte 7
4 - Disable Bit 4 - I have changed this to disable as it was already enabled on my car.

Following the details above we select Module 09 and then take the long coding option from the main control unit screen.

You will be given the Long Coding screen as you can see in the picture below to edit Byte and Bit you need to select 1

On the top of the screen you can see a code OBOO1B46C34102F3OBA440 ETC

You can also see on the second line of the white box that we are currently on Byte 00 as you press the blue arrow at the bottom you will go through the various bytes.
Below that you can see the BIT sections, since the last change some of the Bits have a text description to help you with your coding but in simple terms each
tick box is a bit starting from 0 so in this picture you have Bit 0 Steering, Bit 1 Right hand Drive, Bit 2 Manufacturer, Bit 3 Seat, Bit 4 has no description.

This is important as what you will see in your history when you change any of these values will have OBOO1B46C34102F3OBA440 ETC
as you tick each of the bit boxes the HEX number will change.


So as per the instruction we want to change Bit 4 in Byte 7.

The Below screen shot shows you Byte 7 and all its bits.

As you can see we have changed Bit 4 from Activated (Hex F3) to Deactivated (Hex E3)



We then press the green tick and the change is saved.

If you then go to the History section you will see the following, this shows us that Byte 7 value has changed from F3 to E3.

To be clear the new value is made up as follows

Byte 00 = OB
Byte 01 = 00
Byte 02 = 1B
Byte 03 = 46
Byte 04 = C2
Byte 05 = 41
Byte 06 = 02
Byte 07 = E3
ETC

please go to the bottom of the page for more info on how to convert the HEX Value into a value you will see on the screen.



hex2obd11converter.xlsx (366.55 KB)

If you use the above excel file it will convert the Hex value into a simple screen shot of the OBD11 Screen.

Please make sure you are happy it shows the correct value before making any changes to your setup and always always take backups / screen shots if you are not sure.

For those of you who dont have access to Excel go to this site  www.mathsisfun.com/binary-decimal-hexadecimal-converter.html

Enter in the Hex Number (example E3) and it will give you a Binary Number back (11100011)


To read this you go from Right to Left, where 1 = a tick and 0 = Blank.

Therefore you should expect to see on the screen the following
Number is 11100011

BIT 0 = Tick     1
BIT 1 = Tick     1
BIT 2 = Blank   0
BIT 3 = Blank   0
BIT 4 = Blank   0
BIT 5 = Tick     1
BIT 6 = Tick     1
BIT 7 = Tick     1

Remember you read the number starting at the right hand side which will equal the first number on the Long Coding Screen.