medsox
Junior Member
2019 GTI MK7FL Autobahn DSG 2.0L USA
Posts: 58
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Post by medsox on Oct 20, 2022 18:25:19 GMT
Could some one help with the original OEM long code Bits for 2019 GTI MK7FL Autobahn 2.0L USA listed below for OBD11?
5F Byte 23
A5 Byte 15
17 Byte 4
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Post by vwjap on Oct 20, 2022 19:42:30 GMT
U.K. golf
5F Byte 23 =00
A5 Byte 15 =00
17 Byte 4 =00
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medsox
Junior Member
2019 GTI MK7FL Autobahn DSG 2.0L USA
Posts: 58
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Post by medsox on Oct 20, 2022 20:10:25 GMT
Thanks vwjap. I guess I need to be more detailed. I'm looking for "Bit" I believe #s 1 to 6. Which need to be checked and which don't. 5F Byte Index #23 all Bit original settings A5 Byte Index #15 all Bit original settings 17 Byte Index #4 all Bit original settings  |
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Post by dv52 (Australia) on Oct 20, 2022 21:52:26 GMT
medsox : hmm........ indeed, specificity would be very helpful! What exactly are you attempting to do? Bits are an essential part of the (Binary) mathematical system that is used on modules - there are 8 x Bits for each Byte. You can think of a "Bit" as being a software switch (like a normal switch but which does not have a physical button/lever; rather, the software switch is turned ON/OFF via the state "1/0" in its setting). Of course, the omnipotent deities at VW have an exhaustive decoding list of the purpose of every Bit in the long-code string on ALL of their modules. But as mere mortals in the outside world, our understanding for which Bit does what, is limited. To the extent that these functions are known, the purpose of each of these software switches can be found by pressing the center tab in upper part of your picture - the tab that has the "people" symbol. Don
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Post by newty on Oct 21, 2022 6:36:46 GMT
Also, due to the way specification and the whole development and definition process involving several parties works, some bytes and bits remain "reserved" or are prepared and described but never used. A5 Byte 15 for example is used in MFK2high(Early Passat B8) only for the proprietary pedestrian detection. MFK2low (Golf 7) does not have this feature, but the ODX, so the bits there are still reserved or properly described in VWs System, but are set to all Zero.
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medsox
Junior Member
2019 GTI MK7FL Autobahn DSG 2.0L USA
Posts: 58
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Post by medsox on Oct 21, 2022 14:43:12 GMT
Okay. I’ll try and be more specific. I do understand that “bits” are like an on/off toggle switch. Looking at the attached pic example I needed to activate Bit 4 in Byte 16 under control unit A5. Circled in yellow I counted across to what I thought was byte 16 (which was really Byte 15). What I should have done was typed in Byte 16 in the tab circled in red. I now have a better understanding of how long coding works. I was just trying to activate the road sign recognition, but I don’t think it is going to work…my car was made in Mexico. I just want to confirm that I didn’t toggle something I shouldn’t have under the 5F Byte 23, A5 Byte 15 and 17 Byte 4. On a side note, dv52 (Don), newty and vwjap you guys have been great responding to many of my posts. I really do appreciate your help! Thank you.  |
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Post by vwjap on Oct 21, 2022 15:11:51 GMT
Did you do a backup when you first got obd11? If so the coding is there
Look in the history and find the oldest long coding, that will give you the original long coding
Like I said, on mine all three are 00 which is
Bit 0 not ticked
Bit 1 not ticked
Bit 2 not ticked
Bit 3 not ticked
Bit 4 not ticked
Bit 5 not ticked
Bit 6 not ticked
Bit 7 not ticked
Yeah all bits and bytes start at 0/00 and not 1/01
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medsox
Junior Member
2019 GTI MK7FL Autobahn DSG 2.0L USA
Posts: 58
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Post by medsox on Oct 21, 2022 19:32:13 GMT
I unfortunately did not do a back up in the beginning(my fault). I'll check the history. Thanks for your input vwjap. I appreciate it.
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Post by dv52 (Australia) on Oct 21, 2022 21:23:15 GMT
Okay. I’ll try and be more specific. I do understand that “bits” are like an on/off toggle switch. OK - I was just making sure that the fundamentals were understood (I always assume no knowledge)!! Looking at the attached pic example I needed to activate Bit 4 in Byte 16 under control unit A5. Circled in yellow I counted across to what I thought was byte 16 (which was really Byte 15). Yes, if you try to access "Byte 16" by counting 16 x pairs of digits - you will get Byte 15 because the first pair of digits is Byte 0. Better (and much easier) way is don't bother counting -just keep moving to the right along the yellow circled digits shown in your picture below until the number "16" appears in the Byte Index window (circled in red).
I just want to confirm that I didn’t toggle something I shouldn’t have under the 5F Byte 23, A5 Byte 15 and 17 Byte 4. If you look in History, you will find detailed records of the changes that you have previously made. If any are incorrect - unwind the change by re-applying the "old value".
For records in History that relate to long-code changes, the "old"/"new" values will be the entire long-code string from the module.
- To identify the Byte number - you will need to count pairs of digits (don't forget about Byte 0).
- To identify the Bit number - simply use a hexadecimal to binary converter like Thirsty handy-dandy tool HERE . As an example, if the value is (hex) 5A - the Binary value returned by the calculator = 01011010. This Binary value is read like this: Bit0, Bit1, Bit2..........Bit7. So, the left-most digit is Bit0 and Bit7 is on the extreme right-side of the binary value
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