ABF ECU codes

Discussion in '16-valve' started by Matas, Oct 26, 2020.

  1. rubjonny

    rubjonny Administrator Staff Member Admin

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    it should always vibrate with the ignition, if its not then its probably becasue fuse 15 which has blown. this is usually due to wiring damage round the back of the engine running to the breather heater, which as I mentioned shares the ignition live feed from the ISV.

    disconnect the big round plug and get the wiring off the engine regardless, it'll most likely want repairing
     
  2. Matas Forum Member

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    understood, will go take a look at everything you told me :)
     
  3. Matas Forum Member

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    i cant feel it, but if i listen closely i can hear it buzzing, all of fuses are working, but i found that thing hanging in last pic near fuse box.
    Also in first picture this is that vacuum pipe? should I take it off and give it a close inspection?
    second pic is this the plug you talked about that can be deleted? if it is I think i can leave it since isv is buzzing
    123397125_2699016543686133_642013019118002259_n.jpg 123397125_2699016543686133_642013019118002259_n.jpg 123459159_671521053557435_6951940603268590258_n.jpg
     

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  4. rubjonny

    rubjonny Administrator Staff Member Admin

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    black wire is a spare ignition live looks like, no need to worry about it anyway.

    vacuum pipe in your hand is the one for the ecu yep, check that over

    wiring in your hand is for the ISV, need to keep that. the breather heater is round the back of the engine near the throttle body if its there
     
  5. Matas Forum Member

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    Didnt see any 2 pin plug there
     
  6. Matas Forum Member

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    Any tips on how to check vacuum pipe? Blow air into it?
     
  7. Matas Forum Member

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    It doesnt want to turn that big plug haha, also, till where should i strip it? Since its tucked in pretty well down there
    IMG_20201102_150359.jpg
     
  8. rubjonny

    rubjonny Administrator Staff Member Admin

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    pull the pipe off and inspect it end to end. you can block one ens with your finger and suck on the other ;)

    you need to rotate the inner part with the red line in pictureanti-clockwise to release it but they can be very stiff. try to hold the other side still while you do this, its easy to shear off the locating tabs then the whgole lot will spin. once thats off puch the 3 pin plugs out of the front of the metal bracket, then undo the 2 bolts holding it on. from there its self-explanatory :)

    Vw-Golf-Mk1-Mk2-Mk3-Seat-Abf-16V.jpg Vw-Golf-Mk1-Mk2-Mk3-Seat-Abf-16V-_57.jpg Vw-Golf-Mk1-Mk2-Mk3-Seat-Abf-16V-_57-2.jpg Vw-Golf-Mk1-Mk2-Mk3-Seat-Abf-16V-_57-3.jpg
     
  9. Matas Forum Member

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    Ok, will do that with vacuum pipe, this big round plug looks like im about to start a mess
     
  10. Matas Forum Member

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    Vacuum pipe is all good, before I check all the wiring, im suspecting coolant temperature sensor, what resistance should I see in different ranges? do you know that? I'll try to check tomorrow with multimeter if it is in correct range of resistance in different temperatures
     
  11. rubjonny

    rubjonny Administrator Staff Member Admin

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    theres no need to check resistances on the sensor, simply fire up vagcom and watch the coolant temperature measuring block while the car warms up. make sure the sensor reads similar to the coolant and oil temp gauges on the clocks :)
     
  12. Matas Forum Member

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    Coolant gauge?
     
  13. rubjonny

    rubjonny Administrator Staff Member Admin

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    yes, coolant temperature display on the dash board, as well as oil temp on the MFA if you have it :)
     
  14. Matas Forum Member

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    Ah yes, im dumb, oil temp doesnt show anything until like 60 degress
     
  15. rubjonny

    rubjonny Administrator Staff Member Admin

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    yep thats right, just helpfull to monitor both at the same time then you can make sure all 3 are close to the same figure. if so, abf coolant sensor is ok
     
  16. Matas Forum Member

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    Ok, ill go and check it till the car warms up
     
  17. Matas Forum Member

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    This is my coolant temp, havent started the car after a night yet
     

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  18. Matas Forum Member

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    This is when i started my car, its running for few mins now 16045677390582054735884204301829.jpg
     
  19. Matas Forum Member

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    That adjust cond is now 00010001
     
  20. Matas Forum Member

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    Oil showed up saying 50 degrees while coolant time at the time was 72
    Coolant gauged on dash showed 90 degress while coolant on vagcom was 79 and oil 58
     

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