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TPain

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Posts posted by TPain

  1. Okay, here's what I'm getting.

     

    I removed the circuit board from the ECM housing so that I could get access to the back of it to test the components.

     

    From left to right, the top right corner of my ECM picture:

     

    T702 0.982

     

    T401, the green one, gives me 3.052

     

    The last one, unsure of the number, gives me 2.623

  2. I found a D702 and a T702. The T702 is a square vertical black piece, 1 of three pieces along the inside of the wall of the ECM.

     

    The D702 is buried on the bottom near that plastic glue, oblong shape.

     

    I've got my autometer on diode test.

     

    The manual says:

     

    Touch the test probes to the diode under test. Forward voltage will typically indicate .400 to .700V. Reverse voltage will indicate "OL." Shorted devices will indicate near 0V and an open device will indicate "OL" in both polarities.

     

    Sounds like Chineese to me lol.

  3. The Subaru part number on the top are all the same, the second row of numbers below it are different.

     

    With my existing ECM, with my grounding the fuel pump to the body, it starts fine.

     

    With the replacement ECM, I don't need to ground it to the body (grounds works fine in test mode) but the engine will not crank, nothing.

  4. So, I've got my car back finally from the mechanic who didn't know a thing about fixing electrical issues.

     

    Short story, after I attempted to jump my car from a dead battery, I blew a fusible link and some other mysterious grounding issue developed. The mechanic insisted that it was a grounding issue, not an ECM issue. Not wanting to take his word for it, I decided to test it myself and buy another ECM.

     

    This is the very strange part.

     

    My existing ECM provides no ground for the fuel pump, I have to ground the pump at the source for the fuel pump to work.

     

    The ECM that I got from a salvage yard, however, DOES provide the ground signal to the fuel pump but after I take it out of test mode (green connectors) the card doesn't even turn over; fuel pump works, car won't start.

     

    So, it appears that something this is an ECM issue and not a grounding issue like I thought.

     

    I'm going to try another ECM and see what happens. What you do you guys think?

  5. Okay, so I've got to figure out if my ECM is working properly. I could buy another one, but I thought someone would be kind enough to let me plug mine into their Soob and see if it works.

     

    The story is that I'm not getting a ground signal to my fuel pump. I've got an 85 GL-10 Turbo. I need to see if the ECM is preventing the ground from getting to the pump or if its the ground going into the ECM.

     

    Thanks!

  6. Keep in mind thought that only one other ECU has been tried. Frankly, I don't even know for sure if he did that.

     

    What I really want to do is to test the ECM that I have. What the best way to test it. I'm not an an electrical whiz and I could use some help.

     

    Then there was that post I found of someone else's ECM working fine but the ground for the fuel pump did not work; which is why I have my doubts over it not being an ECM problem.

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