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Thread: Which of the 16 pins are used?

  1. #1
    New User yeahforbes's Avatar
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    Which of the 16 pins are used?

    Hi, first post! Which of the 16 pins are actually used by interfaces such as HEX-NET, HEX-CAN, etc and which ones are completely floating?

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    Verified VCDS User
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    Here is a link I saved a long time ago. You might find it useful.
    http://forums.tdiclub.com/showpost.p...0&postcount=11

    Have Fun!

    Don

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    ^^^ and this for CAN network vehicles -perhaps (from an early post).

    The CAN Gateway module -shown on the RHS - applies to MQB platform cars.



    What's missing from the diagram (thanks zenerdiode) is a connection to pin#15 for Terminal 15 supply (i.e. switched +12Volt with ignition turn-on/off)

    Don
    Last edited by DV52; 05-01-2019 at 08:28 AM.
    VW Golf MkVII (MY13) - A3 8V hatch (MY17)

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    Benevolent Dictator Uwe's Avatar
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    Current interfaces use:

    Pin 1: Terminal 15 (switched power, to detect when the car's ignition is on).
    Pin 4: Ground
    Pin 6: CAN-H
    Pin 7: K1
    Pin 14: CAN-L
    Pin 15: K2/L
    Pin 16: Terminal 30 (un-switched power)

    However, in the diagnostic socket on the latest cars, additional pins may be used for other purposes, such as DoIP (Ethernet).

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Verified VCDS User PetrolDave's Avatar
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    Some older cars, such as my other drive (a Citroen C1) have a VERY non-standard pinout - because don't have an equivalent to a CAN gateway so each module with a diagnostic connection is connected to separate pins on the 16-pin connector.

    Means that diagnostics on e.g. power steering, ABS or TCU need an adapter

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  7. #6
    Ross-Tech Employee Eric's Avatar
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    You ain't metal till you got a clutch pedal

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by PetrolDave View Post
    Some older cars, such as my other drive (a Citroen C1) have a VERY non-standard pinout - because don't have an equivalent to a CAN gateway so each module with a diagnostic connection is connected to separate pins on the 16-pin connector.
    Porsche (on the Cayenne) and Lambo (on the Gallardo) used non-standard pins for some systems in the previous decade as well, as did MBZ/VW on the LT35 for the MBZ modules (everything except 01-Engine and 25-Immo).

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    New User yeahforbes's Avatar
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    Thanks all! I should have clarified in the thread title, but this is regarding only what each pin does on the the VCDS interfaces (post #4 is perfect), not what each pin does on various cars. That would be a pretty wild topic and derail this horribly for anyone searching for this more limited scope in the future!

  10. #9
    Verified VCDS User Zenerdiode's Avatar
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    Quote Originally Posted by DV52 View Post
    What's missing from the diagram (thanks zenerdiode) is a connection to pin#15 for Terminal 15 supply (i.e. switched +12Volt with ignition turn-on/off)
    Thanks Don. However, you need to correct your post; as it's Pin 1 for T15. Your diagram is correct already - just without the switch.

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