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Reading an ECU

Discussion in 'ECU's, Electronics, and Tuning' started by testtype00, May 4, 2004.

  1. testtype00

    testtype00 Member

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    I have what may seem like a dumb question but I don't know the answer so plz just help me out.
    (yes I've searched for answers already) I have a 1990 si still running stock and the check engine light is coming on. I have tried to read the ECU. I think it is reading just a 1 but I'm not sure how long a pause there should be between flashes in order to read it.
    It started when I tried to replace my O2 sensor and found out the current one is siezed in place.
    So I recconnected it. That is when my check engine light started coming on after around 15-20 minutes of driving.

    If someone could help me understand what the timing is on reading my ECU I would be gratefull.
     
  2. radnulb

    radnulb Senior Member

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    a real quick blink = 1 (o2)
    if you have time to say "one" out loud it is probably a 10 (IAT)

    Judging by you fucking with the O2, I'd say it's probably a 1.

    there is a check timing connector you have to jump. Once you jump it, you use a timing light to set timing. The connector is 2 pin, down by the ECU.
     
  3. testtype00

    testtype00 Member

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    Thanks for the info. I'm guessing you said

    "there is a check timing connector you have to jump. Once you jump it, you use a timing light to set timing. The connector is 2 pin, down by the ECU."

    because you think the timing might be out? But I haven't touched the timing at all. Just screwed with the O2 sensor.
     
  4. testtype00

    testtype00 Member

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    The LED is a seemingly continuos flashing with about a one second pause between flashes
     
  5. radnulb

    radnulb Senior Member

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    its a code one. you were the one concerned with your timing.
     
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