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Post by sealeon on Aug 3, 2020 18:16:27 GMT
Hi, A question: Do car's diagnostics only log fault codes, or do they log any mods made with tools such as OBD11 too? I've had a scout through past posts and couldn't find a definitive answer on this... My situation: I have a car (2014 Seat Leon FR Hatchback) with gearbox issues. Following a botched clutch repair, the biting point is hazy and the clutch grabs unpredictably. Contributing to drivability issues is the fact that my car 'helps' with moving away from standstill, adding a blip of throttle (I think it's called an anti-stall feature?) exactly where I don't want one while I'm trying to match the revs to the biting point! I would love to disable this feature so that I can get a clearer feel for the clutch issue alone (and also make the car more drivable while repeated attempts to get the dealership to repair it continue to drag on). I understand from lots of past posts that it's easy to change this behavior using OBD11 and the 'direct throttle' mod. I am itching to get on and do it but I have one hesitation - will making a the mod leave any form of entry in the car's onboard diagnostics that could notify the dealership that it was modified? If it does, then I guess there's a chance that the dealer may use it as an excuse and say "You fiddled with it, hence you must have caused the issues, we're not taking responsibility". Obviously I realize the mod will change some values deep within the coding, but my understanding is that this is unlikely to be noticed unless you went looking for it? Any clarification on this, or advice gratefully received. I'd love to make the mod and stop bunny-hopping across junctions. After 11 years of skillful driving, it really is mortifyingly embarrassing!
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Post by dv52 (Australia) on Aug 4, 2020 2:33:56 GMT
sealeon: Very good question- to which the answer has to be that if the dealer is prepared to look in sufficient detail, of course there will be a trail of evidence that the car's programming has been altered! Your 2014 Seat Leon FR Hatchback is built on a MQB platform which means that there is a complete database stored in the VW mother-ship of every Byte/Bit as factory set when the car was new. The dealer uses this database to remotely re-build module firmware/software when needed. This means that the dealer can - if sufficiently motivated to do so - compare the current settings in the car with the factory settings in every module. But, as I have said - if sufficiently motivated to do so.
In most cases however, dealers don't bother if the nature of the fault that they are trying to fix doesn't suggest a suspicion of tampering. So yes, you are correct in asserting "my understanding is that this is unlikely to be noticed unless you went looking for it".
It's tempting to proceed by implementing the tweak and then to revert the changed values back to their original settings before taking the car to the dealer (incidentally, if you are contemplating this option, I suggest that you implement the tweak manually, rather than use an APP - that way, your History file will contain a full set of records of every alteration made as well as the before/after settings).
However, I'm just not sure how the workshop code operates in the current OBD11 software version. If you are not aware, every time that you change long-code, or adaptation value in a module, you carry into the process a workshop code that is meant to identify the garage making the change. You can see the workshop code for last changes made to the module by selecting Advanced Information and by entering "workshop" into the search box. You should then be presented with a number of boxes like this:
that you can tick which should result in something like this: My hesitation is that non-dealer devices like OBD11 (and VCDS) use the workshop code 12345. You can set this code in the settings option in Garage in OBD11 - see below (I have no idea why this screen uses "number" and the screen above refers to "code" - sloppy programming, I suspect ): I was able to find the following extract from testeronline regarding how OBD11 uses the workshop code as follows - see here :
"On Android you can set the workshop number that is recorded against any change you make to the cars settings. This makes it look like a Garage did the work and not OBD11 Device"
Notwithstanding the extract above - my observations have been that the OBD11 workshop code isn't used as a tag for changes made by the device. I suspect that OBD11 automatically uses the already recorded workshop code in the first instance and 12345 is used if the number logged against the module is zero - which sometimes happens. But this needs to be confirmed.
If I'm correct, you would need to make sure that whatever module is changed in the tweak has a non-zero workshop code recorded in Advanced information. Of course, I'm assuming that the other measurement value in the first box in my first picture above doesn't record date/time for these type of changes!
Don
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Post by Deleted on Aug 4, 2020 6:25:25 GMT
Just to add to Don's dv52 (Australia) advice. Afraid the Manual clutch on the Leon is infamous for problems I have seen many stock cars with issues requiring new Clutches to be fitted. If you have not already checked out seatcupra.net you should do so and see problems others have had with dealers getting these things fixed. With regards to the Workshop code this is the response that was given here1. Workshop code is code which is showing where coding or adaptations was changed. Every official workshop have own code and Volkswagen service can identify where changes was made. So earlier we used code 12345 for all changes, now you can enter your own code if you have. Also you can read out workshop code from control unit and use it as your standard. then dealer will not know that coding was changed not by official workshop.
i will check this out again as i am sure it used to work.
In general checking history to refuse warranty claims in the Seat UK world seems to be fairly rare but Seat UK Response when asked about changes using tools like OBD11 Was clear, if you enable or modify a setting then it is no longer covered by warranty as you have modified it.
UPDATE
did a quick test and its buggy but it does work, what I found was you have to change the code, save it, log off wait a few moments and log back on again and then the new code is applied. It does not work (on my old Cupra) when you change it and then do an adaption at the same time.
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