TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Diagnostic Port Index

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

  1. Krash

    Krash No Whining

    Apr 18, 2017
    Intermountain US
    #1 Krash, Sep 23, 2017
    Last edited: Oct 17, 2017
    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?
    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.​

    Change in Connector

    The connector changed on Sept 2015. What approximate VIN is that?​

    Adapter Cables

    in US
    Chris TX
    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
    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
    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 ( listed)
    Sumitomo 6098-5629 (appleguru referenced part)
    Male Housing Pins
    Sumitomo 8100-3622 (0.64mm (025))
    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


    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
    • Informative x 13
    • Helpful x 2
    • Like x 2
    • Love x 2
  2. petersv

    petersv Member

    Jul 2, 2013
    Great writeup
  3. lunitiks

    lunitiks ˭ ˭ ʽʽʽʽʽʽʽʽʽ ʭ ʼʼʼʼʼʼʼʼʼ ˭ ˭

    Nov 19, 2016
    Prawn Island, VC
    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

    Aug 8, 2012
    Hayward CA
    Thank you for putting all that great information together.
  5. Solarman004

    Solarman004 Member

    Apr 27, 2016
    This should be a sticky note in both the S and X sections.
    Great work.
  6. petergrub

    petergrub Member

    Jul 6, 2016
    Phoenix, Arizona
    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.

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.