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Thread: OBDlink SX Power question

  1. #1
    High Voltage blk02si's Avatar
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    OBDlink SX Power question

    I purchased the OBDlink SX and so far it's been an amazing purchase. Works flawless with my 08 dakota, 10 malibu, and reset some lights in my brothers 99 explorer. Anyway I want to hardwire this into my truckPC [always plugged in] and wondering if this is ok / possible with the SX cable. I shut my PC down completely at night , including the main power lead. If I leave this hooked up will it shut off with the car, or does it stay on and drain the battery?

    Thanks for any help.

    Joe
    Build Things, it keeps your brain busy.

    AutoPC v1 (Retired) - AutoPC v2 (in progress) - www.shocknet.us

  2. #2
    VENDOR - ScanTool Vitaliy's Avatar
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    OBDLink SX uses USB +5V as its primary source of power. Once you cut the USB power (or "suspend" your PC), current consumption drops to zero.

    Vitaliy
    OBDLink MX: world's smallest, fastest, most advanced OBD/Bluetooth adapter with SW and MS CAN support. Read the review to learn more.
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  3. #3
    High Voltage blk02si's Avatar
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    Thank You Vitaliy.

    So the OBDlink SX draws nothing from the OBD port itself when the car is off? Or is that dependent on the vehicle?

    I'm a newb to OBD integration.
    Build Things, it keeps your brain busy.

    AutoPC v1 (Retired) - AutoPC v2 (in progress) - www.shocknet.us

  4. #4
    VENDOR - ScanTool Vitaliy's Avatar
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    Sorry, I was thinking of OBDLink, which has a digital switch that the main chip uses to cut off 12V from the rest of the circuit. SX was not meant to be connected permanently, so it does not have the switch. However, with USB power off (or in sleep mode), it draws only 8 mA from the OBD port, roughly the same as ScanGauge. Eight milliamps is not quite zero, but you can safely leave it plugged in, even if you don't drive your car for several days.
    OBDLink MX: world's smallest, fastest, most advanced OBD/Bluetooth adapter with SW and MS CAN support. Read the review to learn more.
    Need to look up a diagnostic trouble code? Try the most up-to-date, free DTCsearch.com!

    You cannot send me a private message using this forum. Use my email instead: vitaliy[@]scantool.net.

  5. #5
    High Voltage blk02si's Avatar
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    I decided to put a relay on pin #16 of my OBD2 connector so it shuts off the OBD2 port power with ignition.
    Build Things, it keeps your brain busy.

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