Transmission Failure Message - 2005 612. Code reader type/advice? | FerrariChat
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Transmission Failure Message - 2005 612. Code reader type/advice?

Discussion in '612/599' started by Neil183, Jan 30, 2023.

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  1. Neil183

    Neil183 Rookie

    Mar 3, 2014
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    Neil B
    #1 Neil183, Jan 30, 2023
    Hi.

    I have had this scary message appear once before about a year ago, but after leaving it for 10 minutes, turning on/off a few times - it cleared. The car then drove absolutely fine.
    Today when I got it out of the garage where it had been sitting on the charger for 2 months it started first time with no issues, I moved it onto the driveway, but when I tried to restart shortly after, the dreaded message appeared and now will not turn over.
    I've disconnected and reconnected the battery for 1 hour but this has made no difference.

    I am thinking about investing in a Foxwell NT530 for around £200 which I'm hoping may help so I can get it cleared then to the dealer.
    Has anybody used one of these and would recommend it, or any another type of OBD reader maybe? Happy to spend more if needed...

    All suggestions much appreciated as ever!!

    Thanks guys.

    Neil.
     
  2. Stackhouse

    Stackhouse F1 Rookie
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    #2 Stackhouse, Jan 30, 2023
    Check your "T" handle. If its "Floppy" ie you don't have to pull it up to engage reverse, make sure you return it to the center position and don't accidently bump it down. If the handle is not in the proper position it will always result in a Trans Light , which is essentially telling you that your request for reverse is not allowed.

    Too many F1 owners have spent $$$ at the dealer or sold their cars for cheap fearing their trans was about to explode because their floppy T handle would occasionally trip the code!

    Cheers!
     
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  3. Daytona86

    Daytona86 Rookie

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    #3 Daytona86, Jan 30, 2023
    I got an Autel MK808S. I use it through the "international" side (not vehicle specific) and it works well to see the codes and resets.
     
  4. brogenville

    brogenville Formula 3
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    #4 brogenville, Jan 31, 2023
    Another one to check is the brake pedal switch. TCU won't permit the starter relay to ground if it doesn't see this.
     
  5. Neil183

    Neil183 Rookie

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    #5 Neil183, Feb 1, 2023
    Thanks for all the suggestions which I've checked but unfortunately haven't sorted the issue.
    I'm just deciding now which scanner to buy in the hope that I can clear the message and get the car moving.
    Fingers crossed!
     
  6. brogenville

    brogenville Formula 3
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    #6 brogenville, Feb 1, 2023
    The scanner will help you understand why the car isn't moving, but clearing the code in itself isn't going to allow it to start again. If the underlying fault condition isn't remedied, then the fault will be straight back there again.
     
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  7. Neil183

    Neil183 Rookie

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    #7 Neil183, Feb 6, 2023
    The plot thickens...

    After a few days with the battery on charge, then disconnected, I tried again and it started first time, drove perfectly, no error codes! :confused:

    My Foxwell NT530 scanner with the specific Ferrari software loaded then arrived, I plugged it in and the only codes I can find are P1 602 & P1 611 which I believe are showing as I had the battery disconnected (via the red kill switch in the boot) and a code on the transmission which I guess is my stored problem, of P1 755 "ignition enabling relay driver"

    Does anyone have any suggestions or comments please??

    Many thanks

    Neil.
     
  8. brogenville

    brogenville Formula 3
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    #8 brogenville, Feb 6, 2023
    Those are powertrain fault codes (starting with "P"). If the error was with the gearbox, then try scanning the gearbox ecu and see what stored codes are there.

    Can you remember what the message was on the display when the car wouldn't start?
     
  9. Neil183

    Neil183 Rookie

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    #9 Neil183, Feb 7, 2023
    Cheers Robin.

    Assuming im doing this correctly, then I scanned both ECU sections titled " Transmission (Magneti Marelli CFC231 & CF301)"
    They both came back with the same:
    ID= P1 755
    Status= Missed
    Description= Ignition enabling relay driver

    No other codes anywhere.

    The alternating messages on the dash (when it wouldn't turn over) were:
    "Transmission failure" (red image of a gearbox also) and "Transmission failure. Go to dealer slowly"

    Really confused, as the car starts and drives perfectly, maybe its a sign that I should do some more miles!!??
     
  10. brogenville

    brogenville Formula 3
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    #10 brogenville, Feb 7, 2023
    So I looked up what this code means, and it is indeed an odd one. I assumed that there would be a sensor returning an invalid value, but this is different. It seems to be saying that the transmission control unit (TCU), which has the ability to prohibit engagement of the starter motor relay, has detected either a high voltage or a short circuit on the connection between the TCU and the starter relay. The diagnosis is indicating to check for wiring faults on that line. It may actually be genuine Italian car electronic weirdness, and hence will self cure, but if not then start looking for wiring faults.

    The fact that it’s a missed code is saying that this fault occurred previously, but is not currently present. I would clear the code now so you know if it comes back it’s reoccurred. This code would certainly correspond to the transmission failure warning and refusal to start anyway.

    Of course the simple thing to do is just get rid of the TCU entirely and put a clutch pedal and gearstick in there!

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  11. Neil183

    Neil183 Rookie

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    #11 Neil183, Feb 8, 2023
    Thankyou so much, that's very useful and quite a relief in a way!
    I'll clear the codes and use the car a bit more, as this only really happened after periods of sitting around on charge. If it returns I can at least carry out the check for a short as described.

    Yes BTW, a real manual would be awesome, have you cracked it now then and offering a changeout service?! :D

    All the best

    Neil
     
  12. brogenville

    brogenville Formula 3
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    #12 brogenville, Feb 8, 2023
    Yup, pretty much. Drop me a PM if you’re keen. [emoji106][emoji16]


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