Pin numbering for 355 immobiliser module 167065 | FerrariChat
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Pin numbering for 355 immobiliser module 167065

Discussion in 'Technical Q&A' started by redwedge, May 18, 2024.

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  1. redwedge

    redwedge Formula Junior

    Sep 30, 2012
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    Steve C
    #1 redwedge, May 18, 2024
    I have the wiring diagram for the 355 but would like to know how the pins are numbered on the immobiliser module 167065. A couple of sources suggest that pin 1 of the left-most connector (16-pin AMP 040) is top-right as I look at the part, however my bench testing suggests otherwise and I don't want to fry my used test board (of course it might already be fried...)

    Thanks
     
  2. Qavion

    Qavion F1 World Champ
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    Ian Riddell
    #2 Qavion, May 18, 2024
    I notice a discrepancy between the pin numbering in the WSM and the pin numbering imprinted on my car's connectors some time ago and created this diagram showing the relationship.

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    The top row of numbers is as per the WSM, the lower row of numbers is what I found on my own car. I would have matched up the numbers on the harness plugs with the actual wire colours on the car to create the diagram. As you can see, the large red power wire goes to pin 16 (as marked on my harness plug)

    Unfortunately, I'm not near my car at the moment, so can't recheck. Is there pin numbering on the actual ECU or just on the plugs?
     
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  3. Qavion

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    #3 Qavion, May 18, 2024
    The 550 also has an immo ECU with the same type of plugs, but I haven't physically checked the numbers on the plugs.

    I did a comparison with the 550 WSM diagram and my F355 numbering... Top row is 550 WSM

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    The (live battery) power wire is on pin 8, according to the 550 WSM (red wire), but I suspect the 550 is like my F355.

    Key power is on 6 (550) vs pin 14 (my 355). The is also an additional power wire from the hazard/turn system... pin 15 (550 wiring diagram) vs pin 7 (my F355)


    Sorry, I don't know the orientation of the pins on the plug (I don't know what is on "top right").
     
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  4. Qavion

    Qavion F1 World Champ
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    #4 Qavion, May 19, 2024
    I noticed a discrepancy (I should have said).
     
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  5. redwedge

    redwedge Formula Junior

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    #5 redwedge, May 20, 2024
    Thanks @Qavion - I got it worked out in the end (pin 1 is top-left looking at the back of the connector, and my wiring matches the WSM)

    I've bench tested the box to see if I could read the status LED - which I can - but bizarrely, it gives 34 short pulses on startup before settling into the standard rhythm of 1 pulse every 2.5 seconds. Do you know what those start-up pulses mean?

    Just to explain myself - I've built a box of electronics that can mimic the signals sent by someone sitting in the driving seat and trying all 10,000 possible PINs and hope to get a method of PIN retrieval that involves simply plugging a box into the car for a few days, rather than having to remove and mail expensive parts. I just need to integrate that box with the immobiliser now. I'm almost there.
     

    Attached Files:

  6. Qavion

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    #6 Qavion, May 20, 2024
    It's kind of confusing when you then go to the car and find a different numbering system on the connectors. That's why I added those numbers to my diagram.

    No idea. I know the pulses increase in rate when you open the door. Maybe it's looking for external signals on power up and in the absence of those, generating a long sequence.

    Good luck with the project. :)
     
  7. redwedge

    redwedge Formula Junior

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    #7 redwedge, May 20, 2024
    I think I've answered my own question. Entering PIN entry mode results in 34 pulses. Maybe that's what it does on startup when it's not connected to the rest of the system.

    Thanks for your help and of course for the wiring diagrams.
     
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