How to check an ECU

Discussion in 'General Motoring' started by David Plotner, Feb 6, 2004.

  1. David Plotner

    David Plotner Guest

    I am thinking that I have a fried ECU? Is there a way to do a diagnosis on
    it? It reads sensors OK (I can disconnect a sensor and throw an error), but
    I have exhausted all the options I can think of as to why my car won't
    start.
    (yes, the same '99 V70).

    Thanks!
     
    David Plotner, Feb 6, 2004
    #1
  2. David Plotner

    Per Hauge Guest

    Have you checked all the fuses?
    After you changed the O2 sensors, you cleared the computer, how did you do
    that?
    You say there are no OBDII codes, do you actually read off the codes or is
    it just not indicated on the Check engine light?
     
    Per Hauge, Feb 6, 2004
    #2
  3. David Plotner

    David Plotner Guest

    I've checked the fuses (visually...still need to check with a meter).

    I cleared the computer, and checked for codes with an Innova 3100 code
    reader
     
    David Plotner, Feb 7, 2004
    #3
  4. David Plotner

    L David Matheny Guest

    Have you checked the fuel pump relay and the "RPM sensor" that tells
    the computer that the engine is turning over?
     
    L David Matheny, Feb 7, 2004
    #4
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