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Diagnostic Port Index

Discussion in 'Model S' started by Krash, Sep 23, 2017.

  1. Krash

    Krash Data Technician

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    #1 Krash, Sep 23, 2017
    Last edited: Mar 29, 2018
    There is great technical information on the diagnostic port (TDC - Tesla Diagnostic Connector) in the forum but as I found it difficult to find in the different threads, I started an index. Please comment with corrections or additions.

    Why access it?
    To access more and more granular car diagnostic information that can be obtained by the apps that use the online Tesla APIs. Motor torque for example. Or battery temperatures.​

    Where is it?
    On the roadster?

    On the S and X between the front screen and the cubby. Pull the front of the cubby down to access. Don't pull the cubby out (just down) on the older cars or it is hard to reinstall.

    On the Model 3 it is rumored to be the white 5 pin connector underneath the left dashboard. (still on the left for right hand drive cars?)​

    Change in Connector

    The S and X connector changed physical connectors on Sept 2015. What approximate VIN is that?

    If the Model 3 connector is the connector previously mentioned, Jack Rickard believes that it is a Sumitomo connector (unknown part number) running BroadR-Reach Ethernet physical layer over unshielded single twisted pair cable at 33.3 Mbps with the CAN data hidden inside.​

    HARDWARE
    Adapter Cables

    Sellers
    in US
    Chris TX
    Old
    New
    Maxwelltech
    New
    in Norway: petersv
    Fasttech Roadster
    Adapter Pinout
    The community is creating the standard, several groups are using a four wire connector, but garygid is also using this more advanced ten wire pinout.
    Diagnostic Housings and Part Numbers
    Roadster and pre Sept 15 S
    Male Connector
    Male Connector Pins
    Mouser: AMP 173630-1 (minimum 4000)
    Mouser: AMP 173630-6 (minimum 1000, Is this the same as -1?)
    Online Components via Octopart
    Model X and post Sept 15 S
    Female Connector
    Sumitomo 6098-5622 - 自動車用部品:Sumitomo Wiring Systems, Ltd
    Sellers
    The Plug Dealer (White) - Listed as $4.45 in stock
    The Plug Dealer (Blue)
    Unresponsive to minimum order quantity and spec sheet request​
    Q Components | Part Search
    Quoted 115 minimum order quantity at $1.75 USD on 25 September 2017
    Female Connector Pins
    0.64mm minimum two, maximum sixteen per connector
    8240-0182, 8240-0338, 8100-3624, 8100-3628, 8100-3625, 8100-3629
    Seller
    The Plug Dealer part 6874 - $0.34 USD - Tin
    The Plug Dealer part 6875 - $1.58 USD - Gold
    1.5mm minimum two, maximum four per connector
    8240-0279, 8240-0215, 8240-0213, 8240-0214, 8240-0339
    Seller - The Plug Dealer part 5597 - $0.30 - Tin
    Vehicle Housing Part Numbers
    Roadster and pre Sept 15 S - Tesla Part X437
    Female Housing
    Female Housing Pins
    Mouser: AMP 173645-1 (minimum 3000)
    Model X and post Sept 15 S - Tesla Part X437A
    Male Housing
    Sumitomo 6098-5613 (Sumitomo listed pair for 6098-5622)
    Sumitomo 6098-5620 (service.teslamotors.com listed)
    Sumitomo 6098-5629 (appleguru referenced part)
    Male Housing Pins
    Sumitomo 8100-3622 (0.64mm (025))
    Seller
    The Plug Dealer part 6872 - $0.21 USD - Tin
    The Plug Dealer part 5949 - $0.32 USD - Gold​
    Sumitomo 8230-4923 (1.5mm (060))
    Seller - The Plug Dealer - no stock
    ELM ODB2 Modules

    ELM ODB2 Module Alternatives

    SOFTWARE

    Unanswered Questions

    Can multiple diagnostic connectors be used at the same time on a splitter? If so which?
    How long of an extension and\or splitter can be used reliably?
    Will Tesla disable the diagnostic port like they disabled the collocated Ethernet port?​

    Sources and other Relevant Threads
     
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    • Love x 4
    • Helpful x 2
    • Like x 2
  2. petersv

    petersv Member

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    Great writeup
     
  3. lunitiks

    lunitiks ˭ ˭ ʽʽʽʽʽʽʽʽʽ ʭ ʼʼʼʼʼʼʼʼʼ ˭ ˭

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    Yes totally awesome. If I could nitpick: The real diagnostic port is actually the smaller Roseberger connector next to the chunky CAN port. Well, I guess theyre both diag
     
  4. MichaelS

    MichaelS Supporting Member

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    Thank you for putting all that great information together.
     
  5. Solarman004

    Solarman004 Member

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    Colorado
    This should be a sticky note in both the S and X sections.
    Great work.
     
  6. petergrub

    petergrub Member

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    I assume you are referring to the CAN buses on the the diagnostic connector. You can build a 4-way breakout cable that Tesla uses on the Roadsters and for the early Model Ss too.

    It connects to the diagnostic connector and splits the four buses out to separate DB9 connectors.

    Per the information at this National Instruments link, and information from several other websites, the maximum length should not exceed about .3m or 1ft. I regularly use a breakout cable about 2ft in length without issues. I also didn't take into account the length of the tee'd off section of wiring form the behind the cable. The Roadster diagnostic cable directly splices into the CAN bus cables, while the Model S and X tee from behind the center display.
     
  7. Martin J

    Martin J New Member

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    Can you get power from the ODB port ? 2015 S85 RHD
     
  8. petergrub

    petergrub Member

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    Yes, but keep in mind that it's fused for 5A
     
  9. Martin J

    Martin J New Member

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    Ireland
    Thank you for the response Peter. Do you know if you can get 12 volts from it?
    Appreciate your help.
     
  10. petergrub

    petergrub Member

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    Yes. I measured 12V between pins 1 and 20 while the vehicle was in standby.
     
  11. GregRF

    GregRF Squirrel Power

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  12. petergrub

    petergrub Member

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    You're better off getting a PEAK PCAN-USB or similar CAN-USB interface dongle and accompanying software like PCAN Explorer or CANtrace. You could also use the free software, but it's quite limited in terms of logging and decoding frames.

    Decoding CAN frames is not a trivial task.
     
  13. Krash

    Krash Data Technician

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    If it really is BroadR-Reach Ethernet physical layer over unshielded single twisted pair cable at 33.3 Mbps with the CAN data hidden inside, there may be not be CAN wires to sniff. You may have to decode CAN from something else.
     
  14. petersv

    petersv Member

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    If I had more time, I would try Comma.ai's Panda: panda OBD-II Dongle

    It's probably the most capable device at that price point. They have some nice software as well for messages debugging.
     
  15. appleguru

    appleguru Member

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    I use the panda on the model s; works very well! I have been slowly decoding some of the messages; lots on the model s at least are actually common between Tesla and other cars (many CAN components are “off the shelf”).
     
  16. petersv

    petersv Member

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    Cool, do you have your findings somwhere I can take a look, github etc.?
     

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