1990 Honda Civic ECU

Discussion in 'Civic' started by Terry, Aug 23, 2004.

  1. Terry

    Terry Guest

    A frieds daughters Civic would not start today.
    Gave an error code of 16 flashes. She has had this
    issue a few times before. After doing all the checks,
    everything looked gooed, except for the +12V across
    the injectors for 2 seconds following key on.
    I pulled the ECU and opened it up.
    The unit had a lot of surface corrosion.
    I intend to clean it this Monday, but I suspect
    she will need a new (or used) CPU/ECM.
    Will the ECM from a 1991 Civic work, I can pull mine
    and use it to test the rest of her car.
    At the moment my Civic is our only vehical and
    I am a little leary of swaping least I damamge
    mine.
    If we need to find one in a junk yard, what years
    will work? will one from a CRX of the same years work?
    Has anyone had any luck with the rebuilt units sold
    by Advance?
    They have several, from about $450 down to $150,
    the only differnce being the warrenty period.
    I pulled mine just to check for corrosion and there
    is not a trace. I would have thought the circuit board
    would have coated with a protective spray (silicon).
    Her car is a 1990, 3 door (or 2 door with hatchback),
    MT, dual point fuel injection.

    Terry
     
    Terry, Aug 23, 2004
    #1
  2. Terry

    Mista Bone Guest

    Is the car a 4 speed (70 hp) or 5 speed (92 hp)
    I have a ECU for a 90-91 5speed 92 hp.
     
    Mista Bone, Aug 23, 2004
    #2
  3. Terry

    Caroline Guest

    Meaning there appears to be a problem with the fuel injectors, as you appear to
    know from the rest of your post (but for others)...

    I trust you've been through the troubleshooting chart for this, such as that
    provided at www.autozone.com (click on the free repair guides link on the right,
    put in car info, click on "emissions controls," then "troubleshooting charts").
    It appears yes. My reference for this is Majestic's online parts site as
    follows:

    www.hondaautomoviveparts.com states that the ECM from a 1991 Civic LX manual
    transmission and the ECM for a 1990 Civic 3-Door DX are the same.

    To check other Hondas, go to the parts site, put in the car's info, then go to
    menu choice "Fuse Box-Relay-Horn."

    Majestic wants $664 for a new one, plus shipping and handling.

    But more below on getting second-hand ones.
    I checked one model of 1990 CRX, and it too appears to have the same ECM as the
    Civics above.
    I also saw at least one used ECM for a 1990 Civic at
    http://www.autopartsearch.com/searchframe.cfm , going for under $150.

    Updates welcome.

    I'm no guru but am just trying to learn more.

    Caroline
    1991 Honda Civic LX, manual trans., 155k miles, ECM seems fine.
     
    Caroline, Aug 23, 2004
    #3
  4. Terry

    Caroline Guest

    Bad link. Try instead

    http://www.hondaautomotiveparts.com/auto/jsp/mws/catdisplay.jsp
     
    Caroline, Aug 23, 2004
    #4
  5. Terry

    Terry Guest

    Four speed.
     
    Terry, Aug 23, 2004
    #5
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