Mondial t Cat ECU question | FerrariChat
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Mondial t Cat ECU question

Discussion in 'Mondial' started by Schumi, May 16, 2007.

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  1. Schumi

    Schumi Formula Junior
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    Jun 5, 2002
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    Daren
    #1 Schumi, May 16, 2007
    Can someone please post the location of the ECU cat along with relevant information regarding the "old style" vs. new style? How do I know I am getting the new style? I think one of mine is old as one has a green face and one black. BUT, I am not sure I know where it is and/or what it looks like.
     
  2. buzzm2005

    buzzm2005 Formula 3

    Aug 23, 2005
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    Buzz
    #2 buzzm2005, May 16, 2007
    ECU cat? The t has only one ECU -- well, a pair of the same ECU. You can get at it from the rear trunk. Use a quarter to undo the plastic spinlocks at the top of the rear carpeted bulkhead. The bulkhead will rotate forward from the bottom, exposing the 2 ECU units. They are identical, each controlling half the engine.
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #3 Steve Magnusson, May 16, 2007
    He's talking about the two exhaust over-temperature warning light ECUs. The Mondial t SPC at www.eurospares.com indicates there are different PNs -- one "for M2.7" and a different one "not for M2.7" which I guess is Motronic 2.5. (Take a look at that SPC illustration -- it shows the shape/form of the warning light ECU which will help you identify them.)

    The SPC illustration doesn't give the exact locations, but it implies that it's got to be like a 348 -- somewhere on the rear chassis framework by the rear wheels (just follow the cables from the thermocouples mounted in the cat outlets).

    PS It gave me a chuckle looking at that SPC -- it has "O2 sensor" translated as "Lambda feeler" (which isn't really incorrect ;))
     
  4. davebdave

    davebdave Formula 3
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    #4 davebdave, May 17, 2007
    I just changed both of mine. The new ones have green faces (ought to be gold plated considering what they cost).
     
  5. Schumi

    Schumi Formula Junior
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    #5 Schumi, May 17, 2007
    I can't seem to find anything on Eurospares.com that talks about Ferraris. It is all just motorcycle stuff.
    Also, does anyone know if swapping the two ECUs will work to check if one is bad? Thanks for all the posts.
     
  6. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #6 Steve Magnusson, May 17, 2007
    Sorry -- that should have been www.eurospares.co.uk

    Yes, that's the right approach to take -- if the obviously bad behavior (e.g., not doing self-test correctly, light staying "on" at cold start-up, etc.) moves to the other bank, it's very conclusive that the ECU itself is bad.
     
  7. Schumi

    Schumi Formula Junior
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    #7 Schumi, May 17, 2007
    The next step as I understand it is replacing the thermocouple. Is that the same thing as the O2 sensor? Will a non-Ferrari O2 sensor work?
     
  8. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #8 Steve Magnusson, May 17, 2007
    No, those are not the same thing, but you posted you found trouble with the thermocouple -- right?
     
  9. Schumi

    Schumi Formula Junior
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    #9 Schumi, May 19, 2007
    Now I know the O2 sensor and thermocouple are NOT the same thing - thanks to the posters here. I switched the thermocouple wires from side-to-side and the "Slow Down 1/4" light immediately switched to "Slow Down 5/8". So I think I am right in concluding that the thermocouple is bad. Regardless in the process of removing the bad thermocouple I broke it. Anyone else had this problem and did you do the Hyperflow thing and do away with the cat ECU system altogether?
     

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