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2G No power to OBDII port

Posted by Louis Gibson, Aug 21, 2019

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  1. Louis Gibson

    Louis Gibson Probationary Member

    17
    0
    Joined Jun 23, 2019
    Tillamook, Oregon
    97’ eclipse gst 2.0 turbocharged

    Checked the threads on here and found little to no info other than suggestions to check fuse boxes and my cig lighter circuit/fuse

    Got a new scanner tool (supports Mitsubishi vehicles) and as I went to plug into OBDII port, didn’t get nothing. Checked the tool in my ford ranger and it started right up. I also tested another Bluetooth scanner I had laying around and that also didn’t turn on. Checked my fuses (20amps especially) and didn’t notice any that had blown.

    Checked the external fuse box and didn’t see anything that would control the power going to my auxiliary inputs.

    Any ideas on what could be causing my OBDII port to not function?
     

    Street Build 109  3

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  2. motomattx

    motomattx Proven Member

    1,789
    572
    Joined Dec 9, 2010
    wampum, Pennsylvania
    I have seen the pins in the connector back out, causing no connection, take a volt meter and check for actual voltage and ground on the correct pins.
     

    Drag Race Build 3K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  3. Louis Gibson

    Louis Gibson Probationary Member

    17
    0
    Joined Jun 23, 2019
    Tillamook, Oregon
    I took the OBD port out of the metal sleeve that holds it in place and keeps it from moving. didn’t notice any wires that had backed out. Which pins do I check for voltage? I know the end pin has constant 12v on it at all times, but don’t know exactly how to check voltage
     

    Street Build 109  3

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  4. Clipsoe

    Clipsoe Proven Member

    62
    16
    Joined Apr 22, 2015
    Fort Lauderdale, Florida
    You need a multi meter, may be able to borrow from advanced auto parts or pep boys. Turn the switch to DC and put the black lead on ground, something metal. Then red one on the 12volt constant pin (Pin 16) on the obd port. Should read 12-12.7 volts. Then take the red lead off, turn the switch to continuity ->|-- (should look like that symbol) then put black on ground again, then put red on the ground pin on the obd (Pin 4), you should hear it beep to say ground is present. If those two check out then you may have an issue with the scanner, if not you have a bad fuse, or bad ground.
     

    Attached Files:

    • obd.PNG
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    432  6

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  5. BLACK'98DSM

    BLACK'98DSM Proven Member

    938
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    Joined Feb 9, 2019
    Hoover, Alabama
    $7 at Harbor Freight.
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    352  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    265  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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  6. Louis Gibson

    Louis Gibson Probationary Member

    17
    0
    Joined Jun 23, 2019
    Tillamook, Oregon
    Okay I’ll try that. I have a meter so I’ll give it a shot.

    Any ideas where the bad ground or whatever the issue is might be?
     

    Street Build 109  3

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  7. luv2rallye

    luv2rallye DSM Wiseman

    7,484
    522
    Joined Jun 7, 2003
    Minneapolis, Minnesota
    Check the "Door Lock" fuse in the driver's kick panel which also provides scan tool power (pin 16).
     

    2K  0

    1999 Mitsubishi Eclipse GST
    14.200 @ 95.000 · 2G DSM
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  8. Louis Gibson

    Louis Gibson Probationary Member

    17
    0
    Joined Jun 23, 2019
    Tillamook, Oregon
    I checked them all and everything is good.... I’m definitely a little stumped :/
     

    Street Build 109  3

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  9. Clipsoe

    Clipsoe Proven Member

    62
    16
    Joined Apr 22, 2015
    Fort Lauderdale, Florida
    You may need an adapter for your scanner or repin your obd plug, the power/ground pins may be different in it. What kind and model is it?
     

    432  6

    1997 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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