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F12 Brake flap issues - sensor?

Discussion in 'Technical Q&A' started by Dubai2020, Mar 6, 2020.

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  1. Dubai2020

    Dubai2020 Rookie

    Mar 6, 2020
    3
    Dubai
    Full Name:
    Rudolf schreiier
    Dear Members,
    I am new on this forum, my client has a F12 Berlinetta, and we are facing some issues with the brake flaps, the flaps do function - therefore no mechanical issue. however there seems to be some issue as they stay open and the error message come on the dash: CCM disc brakes cooling system failure, please assist me with a possible fix.

    thanks in advance.
     
  2. Kaizaad M Parekh

    Mar 7, 2020
    8
    India
    Full Name:
    Kaizaad Marzban Parekh
    Dear Members,
    I am facing a similar issue with the F12 Berlinetta were the brake flaps in the front bumper is in the open position and the dash shows a CCM Brakes Cooling system failure message.
    We have provided the motors in the bumper with a direct 12V supply and they seem to be operational. We've even checked the fuses for the aerodynamic system in the passenger side. All relays are functional.

    I'd like to know how these flaps operate. Does the ECU provide the signal to open directly? are there any heat sensors near the brakes that tell the ECU that they need to be cooled? I've not been able to locate these.

    I'm currently using a Texa scanner, a launch and autel, but not the authorised Ferrari Scanner (Leonardo) and hence no errors being shown on it.

    I believe that these flaps open only when the brakes are hot. So how does the car know the brakes are hot? There has got to be a sensor somewhere that I am unable to find.
     
  3. tbakowsky

    tbakowsky F1 World Champ
    Professional Ferrari Technician Consultant

    Sep 18, 2002
    14,948
    The Cold North
    Full Name:
    Tom
    This is a simple yet annoying issue that does not need to be installed on any road going car. I would send the ****box off to the dealer. This nonsensical garbage they install in these "supercars" which will never reach 50%of thier capabilities is idiotic. Let the dumbass who bought the thing pay to play..
     
  4. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,162
    Berkeley, CA
    Full Name:
    Brian Brown
    The Active Aero System (brake flaps) is operate by the front suspension lifter ECU (NSV). It gets brake temperature inputs from the instrument cluster (NQS) and vehicle speed inputs from the brake ECU (NFR). The instrument cluster calculates brake temperatures using an algorithm similar to the algorithm used to calculate brake disk wear.
    The lifter ECU then opens and closes the brake flaps depending on the brake temperature and vehicle speed. Flaps are opened using a locking solenoid and a torsion spring, and they are closed using a motor and and electric clutch. The flap position is monitored by a position sensor (potentiometer) as a feedback to the lifter ECU.

    The flaps open when the brakes reach 350 C and close at 100C. The minimum speed that the flaps will open is 80 KPH and they will close below 25 KPH.
    The instrument cluster informs the driver when the flaps open and close, or if the brakes are overheating or the brake cooling system is malfunctioning.

    If you have a problem with the system, you will need a diagnostic computer that will communicate with the lifter ECU in order to determine the cause of the failure.
    If the system has a malfunction, it leaves the flaps open all the time for safety (maximum brake cooling).

    Brian Brown
    San Francisco Motorsports
     
  5. Solid State

    Solid State F1 Rookie
    Rossa Subscribed Owner

    Feb 4, 2014
    4,848
    Full Name:
    Comor Bidity
    So the lifter ECU is present even if there is no front suspension lifter in the car? I guess its easier to leave it in if it is too integrated into the system.
     
  6. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,162
    Berkeley, CA
    Full Name:
    Brian Brown
    Yes, the lifter ECU is present in all F12s, even those without the lifter option, as it is needed to operate the brake flap system.

    Brian Brown
    San Francisco Motorsports
     
  7. Solid State

    Solid State F1 Rookie
    Rossa Subscribed Owner

    Feb 4, 2014
    4,848
    Full Name:
    Comor Bidity
    Thanks. I noticed that my F12 has the relay and cables for the start-stop option which the car does not have. Also, many modern cars have options installed but not software enabled unless you paid for the option.
     

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