SD1 tester: Antitheft ECU | FerrariChat
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SD1 tester: Antitheft ECU

Discussion in '348/355' started by alexpivo52, Oct 26, 2025.

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  1. alexpivo52

    alexpivo52 Karting

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    #1 alexpivo52, Oct 26, 2025
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  2. Qavion

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    #2 Qavion, Oct 26, 2025
    Interesting. The wiring diagrams only show one plug. i.e. with two wires, grey/green and black.

    Do you need to disable the immobiliser before testing?
     
  3. alexpivo52

    alexpivo52 Karting

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    #3 alexpivo52, Oct 26, 2025
    - Ahhh. NO!!!! :)

    It should be this one then: 2 wires: grey/green and black.

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    Same thing I was having today with the Motronic ECU. And also FORGOT to disarm the alarm. With Motronic I do know the alarm got to be disabled when I was reading the OBDII error codes. Man!
     
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  4. alexpivo52

    alexpivo52 Karting

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    #4 alexpivo52, Oct 27, 2025
    Last edited: Oct 27, 2025
    I sorted out connecting to the Antitheft module (2-wire plug) and Montronic ECU (3-wire plug).

    Q1: What the 3-wire (Green - Black - Brown) plug which is bundled with the white rectangular connector is for?

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    Q2: What is the 2-wire (Grey/Red - Grey) by the Motronic ECU is for?

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    Q3: What is the CAPOTE P. Packer? What is it for? I tried to connect to it by either of the unused 3-wire plug by the Antitheft module behind the driver set by either ISO1 and ISO2 plug and by the 2-wire by the Montronic EDU behind of the passenger seat and wasn't able to connect.

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  5. Qavion

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    #5 Qavion, Oct 27, 2025
    Power Packer is the brand name of the Spider Roof ECU

    That is the diagnostic plug (at least on cars without OBD2 ports). I was under the impression that the OBD2 port wiring was plugged into that, like this:

    https://www.dropbox.com/t/LeAnWdu5X5ylQsys

    Is that the F1 TCU diagnostic port?

    I have brown/red, black and grey/green colours for that, though.
     
  6. alexpivo52

    alexpivo52 Karting

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    #6 alexpivo52, Oct 27, 2025
    No the F1 TCU plug is a cable coming from the TCU connector. I needed to unplug it and plug it to the SD1.

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  7. alexpivo52

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    #7 alexpivo52, Oct 27, 2025
    Last edited: Oct 27, 2025
    Duh, it does say so in the banner. I plugged one then another ISO connector to this plug but wasn't able to initialize the ECU, with or without disarming the alarm. My soft top does work properly, lowering the windows, opening up and closing down.

    Maybe something needs to be plugged in to the white rectangular plug in order to initialize the ECU? It's paired up with the soft top diagnostic connector.

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  8. Qavion

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    #8 Qavion, Oct 27, 2025
    Is it possible that the ECU needs all the logic which activates the roof to activate the databus? Handbrake? Doors? Key?
     
  9. alexpivo52

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    #9 alexpivo52, Oct 27, 2025
    Not sure if #40210 is the ISO plug I took the picture of. On the ISO plug the wires from both ends are Grey/Red - Grey and on your diagram it's Grey - Brown going to OBDII and 3 wires (Black - Brown - Red) coming from Motronic.

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  10. Qavion

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    #10 Qavion, Oct 28, 2025
    Sounds like there are numerous variations between cars, too many to list.

    Not sure I understand your wire colour description. Are you saying the motronic side wires on your cars have no stripes?

    Mine are:

    Motronic side:
    1) Grey/red
    2) Brown
    3) Grey/Black (although some have reported Grey/red)

    OBD2 port side:
    1) Grey/red
    2) N/A
    3) Grey
     
  11. alexpivo52

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    #11 alexpivo52, Oct 28, 2025
    Last edited: Oct 28, 2025
  12. alexpivo52

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    #12 alexpivo52, Oct 28, 2025
    It's not the right plug. The Soft Top ECU plug is under the soft top hydraulic pump on the Passenger side. No Emergency Brake or doors closed nor disarming the alarm needed. All working now.

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  13. alexpivo52

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    #13 alexpivo52, Oct 28, 2025
    Thus, I don't know of what the 2-wire ISO connector by the Motronic ECU is for. There are 7 ECU modules in 355 F1 Spider and 9 ISO connectors while my SD1 is able to connect to all 7 ECUs. Anybody any ideas this connector is for?

    [​IMG]

    And these 2?

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  14. alexpivo52

    alexpivo52 Karting

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    #14 alexpivo52, Oct 28, 2025

    Attached Files:

  15. Qavion

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    #15 Qavion, Oct 28, 2025
    Maybe it's pulling the codes from the blue wire (on my diagram) which comes from pin 60), although one document I have labels that as "E. U. PROG"
     
  16. alexpivo52

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    #16 alexpivo52, Oct 28, 2025
    Are you sure you are not mixing the SD1 Motronic ECU plug with the 2-wire plug? I didn't look on the stripes of the gray wires but the SD1 plug is a closer match to your

    Motronic side:
    1) Grey/red
    2) Brown
    3) Grey/Black (although some have reported Grey/red -- I dough that. It won't be 2 Gray/Red on the same plug = same signal)

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  17. Qavion

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    #17 Qavion, Oct 28, 2025
    Ah... my mistake.

    The original Ferrari paper wiring diagrams don't show any other plugs, but I only have diagrams up to 1997 (and non-F1). There is a plug going from the ECU to the F1, but that is 4-pin.
     
  18. alexpivo52

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    #18 alexpivo52, Oct 28, 2025
    No, the 4-pin plug is another one.

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  19. Qavion

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    #19 Qavion, Oct 28, 2025
    I can't remember if I have that 3 pin grey/red-N/A-grey plug on my '98 gated Australian car. If it wasn't so hard to remove and fit the leather cover, I'd have a look.

    Now I'm not sure if my OBD2 port wiring diagram is correct.

    Are you saying this diagnostic plug is not attached to anything? I assumed it would go to the OBD2 port. Someone in the USA did some wiring checks for me, but I'm not sure if they were talking about the diagnostic plug 40210 or this mystery 2 wire plug.
     
  20. alexpivo52

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    #20 alexpivo52, Oct 28, 2025
    No that 3-pin plug is plugged-in to a Female ISO connector with wires going elsewhere. To connect it to SD1 I needed to unplug it.
     
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  21. alexpivo52

    alexpivo52 Karting

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    #21 alexpivo52, Oct 31, 2025 at 4:21 PM
    Update on wiring:

    Motronic 5.2 ECU plug for SD1:

    Motronic side:
    1) Grey/red
    2) Brown
    3) Grey

    The other side:
    1) Grey/red
    2) N/A
    3) Grey

    2-wire plug by Motronic:

    Motronic side:
    1) Grey/red
    2) N/A
    3) Grey

    The other side:
    1) Grey/red
    2) N/A
    3) Grey
     
  22. Qavion

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    #22 Qavion, Oct 31, 2025 at 5:11 PM
    Last edited: Oct 31, 2025 at 5:21 PM
    None of those match any of the official diagrams I have. Even though the paper diagrams I have say "USA", none include the OBD2 port. So you're saying you still get OBD2 data with the SD1 plug disconnected?

    Does the "other side of the 2 wire plug by Motronic" pins go to the OBD port pins? Or to any of the pins on the Motronic ECU itself? And the Motronic side go to any of the pins on the ECU plug?
     
  23. alexpivo52

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    #23 alexpivo52, Oct 31, 2025 at 7:30 PM
    No idea. Both 3-wire ISO plug (where SD1 plugs in) wires and the 2-wire ISO plug coming from the Motronic connector.

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  24. Qavion

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    #24 Qavion, Oct 31, 2025 at 8:34 PM
    Same here. You'd have to do wiring checks.
     
  25. alexpivo52

    alexpivo52 Karting

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    #25 alexpivo52, Nov 1, 2025 at 6:25 PM
    I am not worry about of where those
    Not going to. I just updated you on the colors of the wires on my '99 F1 USA.
     
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