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Thread: How to confirm Mileage, ECU is stock, resetting OBD counter

  1. #1
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    How to confirm Mileage, ECU is stock, resetting OBD counter

    hi,

    would anyone know how to do the following for the golf gti mk7:


    1. confirm if the mileage showing is the cluster has not been tampered
    2. how to check if the ecu has not been tuned or altered
    3. is there away to reset the obd counter when modifying the ecu to make it untraceable

    thank you

  2. #2
    Ross-Tech Employee Jef's Avatar
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    1 - unknown at this time.
    2 - test drive the car.
    3 - unlikely with VCDS.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

  3. #3
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by tomastomas View Post
    1. confirm if the mileage showing is the cluster has not been tampered
    I don't know of any way except to judge whether the wear and tear on the rest of the car is commensurate with the odometer reading.

    Quote Originally Posted by tomastomas View Post
    2. how to check if the ecu has not been tuned or altered
    On any turbo engine, log requested manifold pressure and compare the peak values with those from a known stock car.

    Quote Originally Posted by tomastomas View Post
    3. is there away to reset the obd counter when modifying the ecu to make it untraceable
    You mean the flash counter? Depends on the techniques used by the tuner. Personally, I wouldn't put any faith in that counter.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Verified VCDS User Keithuk's Avatar
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    I know the dealers machine can check if its been flashed while its in for warranty work that way they make the claim void.
    New User Keith

    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Flat Tyre Indicator, Basic Protection Pack + VCDS.

  6. #5
    Benevolent Dictator Uwe's Avatar
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    The dealer's tool may compare the CVN (see generic OBD-II specs for Mode 9) (or a similar checksum) against their database, which knows the CVN for each ECU software part number and version. In principle one could use a similar technique with VCDS; get the CVN in generic OBD-II mode and compare it with that from a known stock ECU of the same part number and software version.

    However... At least some ECU tuners are aware of this and probably have the skill to fake this out, by having non-stock software return a stock CVN. After all, it's just another checksum and they must already "fix" all manner of checksums in what they do, otherwise they tunes won't be functional at all.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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  8. #6
    Verified VCDS User roth's Avatar
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    Sometimes you can see mileage in other modules engine / trans / etc. You have to go 1 by 1 and look.

    Andy
    Skype ag6167

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    How to check mileage in DSG transmission for example?

  10. #8
    Verified VCDS User roth's Avatar
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    Quote Originally Posted by mtl View Post
    How to check mileage in DSG transmission for example?
    Told you bro, you have to go trough all MVBs 1 by 1 to see the mileage.



    Andy
    Skype ag6167

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  12. #9
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    Sadly in newer DSG transmissions (DSG6 in MQB platform for example) it is not possible to check this mileage. Is this due to change from VW and measuring value is not present or could this still be implemented in VCDS.
    Transmission details of DSG that does not have this measuring value (or any other regarding this mileage). It does have some mileage data, but not total mileage.

    Address 02: Auto Trans (J743) Labels: 0D9-927-770.clb
    Part No SW: 0D9 300 041 P HW: 02E 927 770 AQ
    Component: DQ250-6F MQB H53 4507
    Revision: 05853104 Serial number:
    Coding: 0014
    Shop #: WSC 73430 031 00000
    ASAM Dataset: EV_TCMDQ250021 001001
    ROD: EV_TCMDQ250021_SE37.rod
    VCID: 254BC5B124FAA0128A-8070

  13. #10
    Benevolent Dictator Uwe's Avatar
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    I don't see an obvious solution to implementing this. My guess is that it's in there somewhere, but since it's not documented in the ODX data available for the module, finding it would be the proverbial needle in a haystack problem.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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