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Thread: Ross Tech USB cable doesn't fit Porsche

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  1. #1
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    Ross Tech USB cable doesn't fit Porsche

    I have a 1997 Porsche Boxster and I'd like to be able to read/clear the ODBII data from the car. Unfortunately, the cable doesn't fit the ODBII connector on the Boxster even though cheap ODBII readers do fit. It seems to almost fit, but there is something keeping it from sliding all the way on.

    Suggestions? Is there an adapter somewhere?

    Thanks.

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    Benevolent Dictator Uwe's Avatar
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    I don't think we've had any other reports like that. Unless you can determine what's keeping it from sliding all the way on, I don't see how there's much advice we can give. Maybe post up some photos of that car's OBD-II socket?

    -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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    Quote Originally Posted by Uwe View Post
    I don't think we've had any other reports like that. Unless you can determine what's keeping it from sliding all the way on, I don't see how there's much advice we can give. Maybe post up some photos of that car's OBD-II socket?

    -Uwe-
    Boy, that was hard to get a picture of. It's almost impossible to get the camera down there, to see what you're doing and get any light in there.

    In any case, here's a photo showing the '97 Boxster port (on top) and the Ross-Tech cable on the bottom:



    I wonder if it is the bump on the top edge that's the problem and whether I should just file it down.

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    Verified VCDS User Keithuk's Avatar
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    Welcome to the forum.

    According to the Autoscan.txt VCDS will fit 9P, Porsche Cayenne, 92, Porsche Cayenne, A2, Porsche Cayenne NAR, 97, Porsche Panamera, A7, Porsche Panamera NAR.

    The 16 pin EODB II socket is standard on loads of manufactures, whether Porsche use something different on the Boxster.

    New User Keith

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

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    Ross-Tech Employee Sebastian's Avatar
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    Keith, the Auto-Scan info is for latest model years - after Porsche has been getting cosier with VW/Audi. This topic is about a 1997 and mechanical issues sliding the connector onto the socket - i.e. unrelated to the pin-out.
    Sebastian @ Ross-Tech.com // VCDS Rookie since 2003

    »Nichts erweitert das eigene Wissen mehr,
    als die Meinung eines Andersdenkenden.«

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    Administrator Andy's Avatar
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    I don't think that's a bump on the top edge, but rather a recess. It does look like the plastic trim around the port is really close to the top of it. Is it possible to loosen the screws that hold the port in place to center it better?

    Edit: It looks like the plastic locking tab that we put on the bottom of our connector may be getting pushed down and blocking you from inserting it into the port. Some scan tools use thinner metal tabs or none at all.
    Last edited by Andy; 08-18-2015 at 09:59 AM.

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    When I originally posted this message, I was doing it from memory from the last time I tried. I didn't try it again, mostly because it is too tedious to boot my computer into Windows (I use Linux).

    However, I just tried it again and here are the detailed results.

    @Andy, you were correct. That's not a bump on top but a recess.

    However, the plastic trim isn't that close (hard to tell from the picture) and the outside of the cable fits around the outside of the connector. It can even be pushed on, but only perhaps 2mm. If I hold the cable just right, lightly to the connector, the LED turns orange/green and then green. However, attempting to run the ODBII diagnostics results in "This car is not ODB II compliant" or something similar.

    If I hold the cable just right, but with more pressure to the connector and try to run the ODBII diagnostics the display says "Protocol: ISO 9141" and the LED on the cable starts alternating blinking red then green then red then green.... It has continued like this for a couple minutes before my arm gets too tired and I can't hold it anymore and it becomes disconnected. At that point the software says "Couldn't proceed after too many communications failures."

    Since I've seen my local mechanic's off the shelf ODBII tool (not Porsche made) work just fine on this car, I suspect that VCDS would work if I could just just get the damn cable on.

    Thanks for your help so far. Any more suggestions?

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    Quote Originally Posted by jjd View Post
    Since I've seen my local mechanic's off the shelf ODBII tool (not Porsche made) work just fine on this car, I suspect that VCDS would work if I could just just get the damn cable on.

    Thanks for your help so far. Any more suggestions?
    Remembering back to when I paid my local mechanic to read the codes the last time when I discovered that the Ross-Tech cable wouldn't fit, I compared my cable to theirs and it seemed it didn't have all 16 pins. I wonder if one of the pins might be blocked by the connector. Or maybe the sleeves the pins fit into are slimmer than the Ross-Tech cable. I'll go back to my local mechanic and compare the cables again.

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    Verified VCDS User Zenerdiode's Avatar
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    Hello James,

    I too have a Boxster S 2002 - albeit a RHD one - but the ports are the same. You've just got to have a bit more confidence when connecting. I think the locating tab on the bottom of the OBD-II connector is just fractionally too large for the Porsche connector port. With a positive firm but gentle push, both of my interfaces (Hex-Net and Hex-USB+CAN) fit; and I use them for the exact same purpose you want to, so I confirm they work well.

    Because the HN is newer, when removing from the port, it's eek , oomph , *CLUNK* <checks locating tab with finger> and all is fine.

    I think it'll wear down with use.

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    Quote Originally Posted by Zenerdiode View Post
    You've just got to have a bit more confidence when connecting. I think the locating tab on the bottom of the OBD-II connector is just fractionally too large for the Porsche connector port. With a positive firm but gentle push, both of my interfaces (Hex-Net and Hex-USB+CAN) fit; and I use them for the exact same purpose you want to, so I confirm they work well.
    Thanks, @Zenerdiode. I'll give it a try with more effort, but I already pushed so hard I was worried I was going to break something. You've given me the confidence to try again.

  12. Likes Dana liked this post

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