F355 F1 gearbox warning light and Slow down | FerrariChat
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F355 F1 gearbox warning light and Slow down

Discussion in 'Technical Q&A' started by Michael308GTBi, Oct 30, 2024.

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  1. Michael308GTBi

    Michael308GTBi Rookie

    Sep 10, 2005
    8
    #1 Michael308GTBi, Oct 30, 2024
    Hello , Im Michael from Berlin,
    first I would like to apologize for my bad english.
    FChat is the most important Ferrari forum for me, because of my bad english Ím a reader only, until now


    I have a big problem with my 355 GTS F1

    After changing the clutch flange and Bearing Ím desperate.
    At first it starts normal, so I bleed the the system (without sd2),
    than I start the self calibration (pis, io and octopus; d41 wsm).
    At the end of the io calibration the slow down light begins to blinking and the gearbox warning light going on.

    Now, if I put the key in pos.II, the Gearbox light is on and it BEEP (4 Times).
    I can only shift in 1, 2 and R……if I start the Motor I only shift in 1 and 2.

    I believe to test everything, but I dońt find the solution.

    - Pressure Sensor is working
    - Speedo Sensor is working
    - Octopus calibration is okay and confirmed with one beep
    - Relais and Fuses all okay
    - vescovinis are exchanged with the duo cat ecu from ScudIng Swiss

    Headaches give me the slow down blinking if I the motor is running (combined with gearbox warning light).
    Im sure the slow down blinking in combined with the gearbox warning light are related errors.


    Thanks a lot of your help
    Kind regards from Germany

    Michael
     
  2. Skippr1999

    Skippr1999 F1 Rookie
    Silver Subscribed

    Dec 22, 2009
    4,498
    #2 Skippr1999, Oct 30, 2024
    No idea what your problem is, but when my mechanic changed the entire clutch system on my F1 car, no SD computer was needed. The thing calibrated itself. The clutch went into place and we could hear the self learn process taking place. It’s been flawless for the past 6 years. We replaced everything related to the clutch at the time.

    Yes, any anal people out there, I know, we didn’t reset the 30 year old clutch measurement algorithm that isn’t worth much. Have loved the system ever since.
     
    Michael308GTBi likes this.
  3. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,539
    San Carlos, CA
    Full Name:
    Mitchell Le
    #3 yelcab, Nov 2, 2024
    Michael, your English is fine. I am guessing that you do have an SD2 even though the text says without SD2.

    When you car is idling, you cannot shift into 3/4/5/6 gear because you cannot start out from a stop in those high gears.
    If your car ignition switch is on and the engine is off, you can shift into all gears with the SD2. If you cannot, then one of the sensor is probably bad.
    If the Gearbox fault light is flashing, your system pressure is too low. You need to figure out why. Possible problems are pump, pump motor, and accumulator, or a bad solenoid. There are troubleshooting instructions to figure out which ( @flash32 )
    If the SDL light is on even though the engine is cold, clear all error codes with an OBD2 scanner.

    Good luck.
     
    Michael308GTBi and flash32 like this.
  4. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,873
    Central NJ
    Full Name:
    Dominick
    #4 flash32, Nov 2, 2024
    Michael

    If you can, provide timing of pump cycles with key on/ engine off - how many minutes off and how many seconds ( must be accurate) pump stays on
    Repeat with engine on
     
    Michael308GTBi likes this.
  5. Michael308GTBi

    Michael308GTBi Rookie

    Sep 10, 2005
    8
    #5 Michael308GTBi, Nov 3, 2024
    Last edited: Nov 3, 2024
    Thank you,
    I have unfortunately no SD1 or SD2 Tester, but a Texa Nemo with Supercars.
    Today I use the Texa to made into the Motronic 5.2 ECU, I delete the Cat failure from the ECU, so the Slow Down Problem is solved.

    The Gearbox Warning Light is on, it beep 4 times. I can only shift in R & 1 and 2, without and with running Engine.

    The Accumulator is also new
     
  6. Michael308GTBi

    Michael308GTBi Rookie

    Sep 10, 2005
    8
    #6 Michael308GTBi, Nov 3, 2024
    Last edited: Nov 3, 2024
    If I turn the ignition on the pump is running 7 seconds. Than I can shift 2 times before the pump is running again.
     
  7. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,539
    San Carlos, CA
    Full Name:
    Mitchell Le
    #7 yelcab, Nov 3, 2024
    That means your pump (hydraulics and motor) is bad. You should be able to do three shifts before the pump is on again.
     
  8. Michael308GTBi

    Michael308GTBi Rookie

    Sep 10, 2005
    8
    #8 Michael308GTBi, Nov 3, 2024
    I‘m not sure, because the warning light is on and it beep 4 times if I put the key in pos.II without start everything.
     
  9. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,873
    Central NJ
    Full Name:
    Dominick
    #9 flash32, Nov 3, 2024

    I need the cycle times as stated above ..get in close door ..turn key , so no start car and wait for at 2 cycles and let me know times in mins of pump off

    Then do the same with engine running

    If you want to talk on the phone ..please DM me and we can set up a call ..always better than emails
     
    Michael308GTBi likes this.

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