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355 Maybe reseting a ECU

Discussion in '348/355' started by Markmoller, May 31, 2021.

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Maybe reseting a ECU

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  1. Markmoller

    Markmoller Rookie

    May 31, 2021
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    Full Name:
    Lasse Markmøller
    #1 Markmoller, May 31, 2021
    Hi I have this Ferrari F355 GTS M2.7 from 1995, Last night during test drive before the start of the season, I lose cylinder 5-8, check engine 5-8 does not light at all, even when it is turned on for self-diagnosis, I have a idea if it could be ECU box for cylinder 5-8, does anyone have experience with it? I have read that M2.7 system can be easily deleted and reprogrammed, there are some that can help.
     
  2. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell
    #2 Qavion, May 31, 2021
    Last edited: May 31, 2021
    Did you check your ECU fuse? (Fuse 33 in the footwell). This fuse supplies live battery power to the Left ECU. Ignition power is also supplied to each ECU, but it is unfused.

    The ECU turns on the light prior to start, so you may be right in thinking it's an ECU-related problem.
     
    spaghetti_jet likes this.
  3. Qavion

    Qavion F1 World Champ
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    #3 Qavion, May 31, 2021
    Does the SLOW DOWN light also not illuminate for that bank during startup?
     
    spaghetti_jet likes this.
  4. Qavion

    Qavion F1 World Champ
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    Ian Riddell
    #4 Qavion, May 31, 2021
    I ask this because the ECU also illuminates the light. Also, this may point to a faulty relay "O". This provides power to both lights (not to mention power to the Left fuel pump relay coil, power to various left bank engine sensors, some ECU circuits... )
     

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