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Thread: 2000 Eurovan Misfires, etc.

  1. #1
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    2000 Eurovan Misfires, etc.

    Hi,
    My 2000 Eurovan shot me with some misfire codes the day after I had a new water pump installed. Van is about to hit 50,000 miles on the odometer. Prior to these codes it's been throwing a 1582 code off and on. Started replacing the cloth cover vacuum lines to try and cure that code, in addition to cleaning the throttle valve assembly, but the CEL was still on. I'd appreciate any thoughts/input on what direction to head with this.

    Code:
    ----------------------------------------------------
    VCDS-Lite Version: Release 1.2
    Tuesday, 05 February 2019, 10:12:48:41375
    Control Module Part Number: 021 906 259 P
      Component and/or Version: MOTRONIC M5.9    AT V03
               Software Coding: 00001
                Work Shop Code: WSC 000000
                          VCID: 2237C814BDD7
    8 Faults Found:
    17622 -  Fuel Injector for Cylinder 2 (N31): Short to Plus
            P1214 - 35-10 -   - - Intermittent
    16684 -  Random/Multiple Cylinder Misfire Detected
            P0300 - 35-00 -   -
    16686 -  Cylinder 2: Misfire Detected
            P0302 - 35-00 -   -
    16684 -  Random/Multiple Cylinder Misfire Detected
            P0300 - 35-10 -   - - Intermittent
    16686 -  Cylinder 2: Misfire Detected
            P0302 - 35-10 -   - - Intermittent
    17623 -  Fuel Injector for Cylinder 3 (N32): Short to Plus
            P1215 - 35-00 -   -
    16687 -  Cylinder 3: Misfire Detected
            P0303 - 35-10 -   - - Intermittent
    16687 -  Cylinder 3: Misfire Detected
            P0303 - 35-00 -   -
    I should add that before the misfires there were no drive-ability issues, van idled and ran great, even with the 1582 code.
    Last edited by Uwe; 02-06-2019 at 05:37 PM. Reason: additional info.

  2. #2
    Benevolent Dictator Uwe's Avatar
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    I think I would focus on the fuel injector fault codes. Got wiring diagrams?

    -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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    Thanks Uwe, I do have diagrams.

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by rustyjames View Post
    Thanks Uwe, I do have diagrams.
    It would be cool if you could post the section showing the fuel injectors. I'm a bit puzzled that the faults are "Short to Plus".

    -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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    As soon as I can figure them out I will certainly post it, as well in all the endeavors necessary to resolve this.

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    Some helpful person was kind enough to post a 2000 Eurovan wiring diagram on their webpage, but I'll be dam if I can figure out what's related to the injectors.

    Here's a link: http://www.rialtainfo.com/vw/vw_imag...%20Diagram.pdf

  7. #7
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by rustyjames View Post
    Some helpful person was kind enough to post a 2000 Eurovan wiring diagram on their webpage, but I'll be dam if I can figure out what's related to the injectors.

    Here's a link: http://www.rialtainfo.com/vw/vw_imag...%20Diagram.pdf
    That's by no means the complete wiring diagram for the Eurovan. That's only a portion of it, and not the section that has what we need, i.e. the ECM and fuel injectors.

    -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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    Interesting thread that I came across, with similar problem. Wiring diagram included: https://www.thesamba.com/vw/forum/vi....php?p=7041086

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    Benevolent Dictator Uwe's Avatar
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    OK, so on page 72/3, we have fuel injectors 1 to 6. One side of each is connected to the ECU and the other side of each is connected to the G3 "Plus connection in wiring harness. That means the are low-side switched, i.e. the ECU turns the injectors on by providing a path to ground on its side, and it turns them off by removing that path to ground. That's very common, since it's generally easier for DC electronics to switch stuff to GND than it is to switch stuff to Plus.

    However, it's pretty unsual to see "Short to Plus" fault codes in such arrangements. It's possible you have a couple of failing fuel injectors with intermittent internal shorts in their coils, but I doubt this; it strikes me as unlikely to happen to two of them at the same time.

    Since this started when you were messing with vacuum lines and such, I suggest retracing those steps, especially if they were anywhere near the wiring between the injectors and the ECU.

    -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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    Thank you Uwe, your input is very much appreciated. I will post the outcome when it all gets squared away.

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