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No signal to ECU

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    #1

    No signal to ECU

    92 Accord EX Sedan 5spd F22A6

    OK my ecu fuse under the hood keeps blowing.

    Ive swapped three different ecu's (ecu is good)

    checked all power sources to ecu (neither of the two yel/black are getting power)

    Main relay isnt getting power

    Swapped three different main relay's same issue

    Ive jumped the main relay harness and can manually get power to the fuel pump and injectors (seemingly fine)

    Ive located where each yel/black wire come together and power the injectors,ecu,IAC valve and O2

    Ive tested each of these individually with a fused link and supplied power to each and all of them pass.

    On two different occasions Ive gotten my car to run but the problem only goes away for about a week or so, its an intermittent problem and I cant track it down.

    ANY HELP PLEASE I'M SO STUMPED. IVE GOT A HELMES WIRING SCHEMATICS. AND THE DEALER CANT EVEN TELL ME ANYTHING.

    PLEASE ANY EXPERTS OR FOLKS WITH SAME EXPERIENCE?
    Last edited by lowcomet; 02-12-2008, 11:02 PM.
    Tags: None
    #2
    Find your short to ground if its bustin right when you apply power.

    The New-ish Ride
    My old Ride
    Hear my Vtak!!!
    MK3 Member #3
    I piss off people for fun.
    IA 08 Sunburn Victim #1

    Comment

      #3
      i had the same problem one time when i put my intake in. a blk/ ylw wire was pinched shorting it out. check wires for ecu circuit. its listed in back of helms or chilton.

      Comment

        #4
        Ive ruled out all grounds for the harness

        I gutted my car and I cant seem to find anything damaged with my yel/blk wire

        Comment

          #5
          yeh u definately have a short to ground...if u have gutted ur car and cant find ne thing look again....something has got to b shorting even if its in a relay that u cant see....
          Lost Motion Inc. Repair and Performance Automotive

          Comment

            #6
            aight i'm going back over my wiring i'll let ya know sumthin

            Comment

              #7
              when I put a fused link (10a) on my yel/blk thats routed to the idle air the voltage is spiking but not blowing my fuse or burning up any wires.

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