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where's the Ign Cntrl Unit? '88 LH 2.2 200

posted by  spudtu on  Wed Jan 30 14:31 CST 2013
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last visit: Fri Mar 29 22:29 CST 2013
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Short: Where the heck is the Ignition Control Unit on this LH 2.2 1988 wagon? I'm trying to verify continuity of the gray wire from the ECU to the ICU.

Long: I posted before with questions about the fuel relay. I think I've resurrected that relay (by resoldering) and verified that the problem with non-starting is not injectors or pumps. I find that the ECU is not sending a ground to terminal 86/2 of the relay harness (from pin 17). Continuity on that wire is good. So I'm thinking bad connection from a sensor or ICU, to the ECU. I understand that the LH 2.2 itself is usually above suspicion.

Any other "usual suspects" would be welcome.

Hope I'm not shaking protocol by posting another time on this general problem, but the focus before was on the relay and that seems to be resolved. The post was getting a little long, but could be seen at http://www.brickboard.com/RWD/volvo/1549168/220/240/260/280/fuel_pump_relay_workaround_bad_idea.html.

Full confession: I did run a jumper from fuse 6 supply to terminal 30 on the relay socket, because 12v seemed to be intermittent there. I know now that this throws suspicion on the blade fuse under the hood, but I was still in Fuel System Kindergarten at the time. Won't comment on whether or not I've graduated to First Grade yet...

thanks...David








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    ANSWER where's the Ign Cntrl Unit? '88 LH 2.2 200

    posted by  someone claiming to be CB on  Wed Jan 30 17:26 CST 2013 [RELATED]

    This may help

    http://www.volvowiringdiagrams.com/?dir=volvo/LH%202.2


    the PDF is for the LH2.0, but it's basically the same except for the wiring.... but that along with the additional 2.2 Docs should get you there

    This post has been marked as an answer to the original question.



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      where's the Ign Cntrl Unit? '88 LH 2.2 200

      posted by  spudtu on  Wed Jan 30 18:59 CST 2013
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      last visit: Fri Mar 29 22:29 CST 2013
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      That is really helpful! A wealth of information for a guy with nuthin' but a Haynes manual.

      Thanks much
      David








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    ANSWER where's the Ign Cntrl Unit? '88 LH 2.2 200

    posted by  pageda on  Wed Jan 30 15:35 CST 2013
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    last visit: Fri Oct 24 13:18 CST 2014
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    ICU is on the passenger side engine compartment mounted next to the windshield washer reservoir.
    Dan

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      where's the Ign Cntrl Unit? '88 LH 2.2 200

      posted by  spudtu on  Wed Jan 30 18:54 CST 2013
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      last visit: Fri Mar 29 22:29 CST 2013
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      Yes! That looks like it must be it. About 6"x4"x2" with about 5 wires into it. Will investigate further.

      Thanks!

      David








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        where's the Ign Cntrl Unit? '88 LH 2.2 200

        posted by  Epic2112 on  Thu Jan 31 11:47 CST 2013
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        last visit: Mon Oct 20 12:15 CST 2014
        [RELATED]

        Off the top of my head, it probably has a blue sticker on it with some numbers. But it's the only thing that looks like a computer that is any where near that part of the car, so if you think you've found it, then you've found it.







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