Diagnostic connector location on a '94 Civic

Discussion in 'Civic' started by Gary - KQ6RT, Nov 16, 2003.

  1. Gary - KQ6RT

    Gary - KQ6RT Guest

    The "Check Engine" light came on in my daughters 94 Civic the other day.
    According to the Haynes manual this is still one of the old style systems
    where you retrieve a "flashcode" by jumpering the diagnostic connector. The
    picture in the book is no help at all. I have found the ECM located in the
    kick panel on the passenger side, but I can't find the connector to insert
    the jumper into. Can anyone here help me out? Thank you in advance. - Gary
     
    Gary - KQ6RT, Nov 16, 2003
    #1
  2. Gary - KQ6RT

    Randolph Guest

    You are oh so very close. Within an inch or so from the top, rear corner
    of the ECM you will see a wire harness coming down from above. Two small
    bundles of wires in this wire harness are tucked back up (and I believe
    taped to the wire harness, it has been so long since I first pulled them
    down, I don't remember). You can pull these down. Both of them have blue
    connectors at the end and both of them have a piece of green tape around
    the wires just before the connector. One connector has 2 position, the
    other 3. The one you want is the one with 2 positions. If you still
    can't find it give me your e-mail address and I'll shoot you a photo.
     
    Randolph, Nov 16, 2003
    #2
  3. Gary - KQ6RT

    Leon Guest

    Put your hand under the glove box, all the way to the right, touching the
    side panel. There are two connectors there, a 3-wire and a 2-wire. You are
    supposed to short the 2-wire connector, then turn on the ignition (not the
    engine) and count the number of flashes.

    Bye,
    Leon
     
    Leon, Nov 16, 2003
    #3
  4. Gary - KQ6RT

    Gary - KQ6RT Guest

    Many Thanks to both Randolph and Leon for their help. I located the
    connector and retrieved a Code 41, The O2 sensor heater. Resistance through
    the heater in the sensor seems to be within acceptable range, about 16 ohms,
    and I measure a little over 12 volts available to the circuit through the
    harness. I sprayed the connectors with WD40 before I put them back together.
    I disconnected the battery to clear the code, but when I restarted the
    engine, The light came back on again. At this point I'm thinking I should
    just go ahead and replace the O2 sensor. Thanks again to all who replied. -
    Gary
     
    Gary - KQ6RT, Nov 17, 2003
    #4
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.