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DPF Regen

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Capra, Jul 12, 2018.

  1. Tony Dyson

    Tony Dyson Senior Member

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    The Service, DPF Menu I was referring to in my earlier post for a Maanual DPF regeneration while driving, is on the icarsoft menu system so it's a two man job really initiated from the scanner.
     
  2. ajlsl600

    ajlsl600 Senior Member

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    ok so its prob a star job then .will look ,beginning to think i should just wire the damn laptop into the car !! prob need it to change a bulb on next generation.
     
  3. Auto Addict

    Auto Addict Senior Member

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    Interesting reading, never found that in my icarsoft mb2, will have a good look around next time I plug it in.
     
  4. Tony Dyson

    Tony Dyson Senior Member

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    Yes, that is the reason why I said the job was for two people, one to drive and one to operate the scanner, I wonder how much MB sell he Data to the 3rd party aftermarket Scanner Manufacturers? :)
     
  5. Tony Dyson

    Tony Dyson Senior Member

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    It's in fragmented locations;

    Diagnostics->Front SAM
    Diagnostics->ECU
    Service->DPF for the regeneration.

    One thing I have come to realise is the number of software updates from icarsoft are regular, around 1 a Month and are significant.
     
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  6. Auto Addict

    Auto Addict Senior Member

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    Thanks for that.
     
  7. Auto Addict

    Auto Addict Senior Member

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    Interesting, downloaded the latest software update tool, plugged the iCarsoft into my PC via USB, entered the serial number only to be told that the serial number was not recognised!

    Found the original update tool I had downloaded when I bought the device, put the SSD card into my PC and everything worked OK.
     
  8. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    You cannot force regen a Merc without STAR and checking/updating the engine control unit software. Im not aware of any scanner on the market that can do it other than STAR.
     
  9. Tony Dyson

    Tony Dyson Senior Member

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    Hello Steve, you are probably right, after further reading the manual, it is suggesting a Regeneration could only be initiated on a Blocked DPF Warning, and not forced at will which makes a lot of sense to me. I stated in an earlier post that I would attempt a Regeneration when next convenient in an attempt to mitigate a reported fill level of 45% but have been thinking since that if I have no warning so why would I intervene, I would appreciate your thoughts? below is an extract from the icarsoft MB2 manual FYIP.

    upload_2019-5-28_11-32-16.png
     
  10. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    You talk good sense. The car will regen when it wants/needs to, providing there is nothing stopping it doing so.

    As regards icarsoft, its a system I'm not familiar with, but i know my snap on equipment we have to use on all other makes has a sporadic DPF regen function, on MB's it won't work. STAR which i know like the back of my hand, always has the same prerequisite, which is to check and update the software before carrying out a manual regen, and then you drive the vehicle with STAR connected whilst it goes through its burn cycle.
     
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  11. Tony Dyson

    Tony Dyson Senior Member

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    Thank you for that, it was during one of my 'Less Senior Moments' :confused: I'll wait and see when it thinks it's full!
     
  12. ajlsl600

    ajlsl600 Senior Member

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    so that means benz have us by the nuxx regards a forced regen then ? as i presume one must be online to get the update that we did,nt know we needed.. frankly my limited experience of updates (microsoft) has been that what was often working without incident is after an update often working with many incidents ! as a result i have a preference for avoiding anything to do with an update unless actually having an existing issue that seems software related .
     
  13. Tony Dyson

    Tony Dyson Senior Member

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    Theoretically, when your car decides it needs to regenerate and burn off the soot in the DPF it will do, in the background, providing all operating parameters are met, if a DPF Full or Soot Accumulation warning comes up, something has clearly gone wrong so it is understandable that the STAR procedure will be for a software update first in an effort to correct the problem, then the regen can continue, but if you wish, at the point of a DPF error message indication, a Regen can be manually initiated, without the software update, with the icarsoft MB2.
     
  14. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    No, MB haven't got you by the nuts at all. There is a safety measure that protects your DPF from burning out through unwanted, over activated or wrongly activated regeneration of the emissions control system. Before the invention and fitting of ad-blue, DPF's have to burn somewhere between 400-600'c to clean. If you have someone who doesnt know what they are doing constantly manually regenerating a DPF, you will damage it. Same too if the DPF is full, say because of another sensors failure and the control ECU constantly tries to regen even when there is a fault there.

    MB's have a system where the DPF will always regen, but it won't do if certain parameters from other sensors of the control electronics don't meet the target criteria. So rather than pushing on regardless, causing other potential issues, it will stop the regen process. This will then generate a limp mode where the fault can be identified and fixed.

    A manual regen doesnt always mean it needs a software upgrade. STAR takes you through a guided process where it will state that the software needs to be checked first. If you don't carry out that procedure, it won't take you into the forced regen function. To my knowledge, there is no way to circumnavigate that procedure or a back door way into that function. Once you are in that part of the ECU to carry out a forced regen, STAR needs to be connected to it on a 20 mile or so journey to make sure the process completes properly.

    It just means theres another element that a DIYer on the drive way can't do or an all makes workshop won't be able to do through limited knowledge or equipment. But thats why people like me exist!
     
  15. ajlsl600

    ajlsl600 Senior Member

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    thanks for the explanation, i think my point may remain , my star will look at the software and if it aint happy it will want an update ? and if thats not forthcoming the process cannot be continued . this update is an online story right ? and i guess the check of the same is an online story ?
     
  16. OP
    Capra

    Capra Senior Member

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    I'm no very little about a cars ECU and what the update does, but you cannot really compare this update to that of the multitude of windows updates!
     
  17. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Correct to a point. But you should also have no need to manually regenerate a DPF unless you have fixed a fault with it, which is usually combined with updating the software too. So its a moot point.
     
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  18. Tony Dyson

    Tony Dyson Senior Member

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    So for those of you who are interested, I decided not to attempt to interfere and initiate a regen, there were no error codes therefore there wasn't a problem to resolve.

    Today, I plugged in the scanner again and found the soot level had increased from 45% on May 26th to 88% so that’s only 17 days or 415 Mls so as I had some mileage to cover today decided to record live data from the ECM DPF feed while driving, the soot level increased from 88 to 100% in around 2 Hours then after around 10-15 Mins started reducing fast and back down to 1% in around 30 Mins, unfortunately I believe the data file I created was too big to save so I lost all the component temperature fluctuations to confirm a regen had taken place, there were no noticeable temperature fluctuations in the cluster information, in fact no noticeable changes whatsoever other than the soot content reading gradually and uniformly reducing over time.

    The Data file I have included was taken around 30 Mins after I returned and finding I lost the driving data file so the temperatures indicated are somewhat cooler that at the actual time of the regen however the overall result is that Soot and Ash levels of 0% and a fill level starting off again at 2% is good so I’m happy that everything appears to be working to design specifications.

    I am however not entirely happy with the speed the DPF filled up, time will tell if this is going to be the norm and regular occurrence, I don’t do short journeys, there is a possibility that the cheap ASDA Diesel I’ve been using is the culprit, I filled up before the journey today with Shell’s premium product, I think I’ll stick with that for the time being while monitoring performance.
     

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  19. ajlsl600

    ajlsl600 Senior Member

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    nice info that. i might investigate with my star and see if i can determine the same as you .i have made a deliberate policy of not using the ml for short journeys .a class gets that job. we are off on a lengthy motorway run next week i will sit the "star" on lovelies lap and see what happens,she WILL be thrilled .
     
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  20. Wighty

    Wighty Senior Member

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    I use cheap diesel all the time , I just add cetane to each tank which increases burn temperature . I don't have a dpf though .
     

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