SD1 tester: Antitheft ECU

Anybody knows of where in 355 is the plug for the antitheft module? I tried both plugs by the antitheft module in behind of the driver seat and I also tried both ISO1 and ISO2 connectors to each plug but the SD1 is not able to initialize the antitheft ECU.

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I tried the SD1 on the F1 TCU and HVAC ECU those work great.

 

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?

 

- 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!

 

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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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.

 

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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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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Is it possible that the ECU needs all the logic which activates the roof to activate the databus? Handbrake? Doors? Key?

 

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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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

 

This is not Error Codes from Motronic ISO connector. I unplugged it and yet a common OBDII tester was pulling the Error Codes from Motronic ECU.

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

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

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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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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?



And these 2?

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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"

 

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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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.

 

No, the 4-pin plug is another one.

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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.

 

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.

 

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

 

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?

 

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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Same here. You'd have to do wiring checks.

 

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.