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OBD Scanners Discussions on using On Board Diagnostic (OBD) scanners/ Diagnostic Equipment related to TDIs

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Old January 4th, 2004, 16:56   #1
Jeef
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Join Date: Oct 2002
Location: Blandon, PA
Default build your own interface plans???

Does anyone have a link to a faq on building your own cable?
parts list and diagram. Just trying to save my self the time of figuring it out myself. And yes I know small soldering is involved.
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Old January 4th, 2004, 18:41   #2
michalb
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Location: Edison, NJ
Default build your own interface plans???

You can try this web page .
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Old January 5th, 2004, 18:34   #3
uponblocks
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Join Date: Dec 2003
Location: los angeles
Default build your own interface plans???

Thank you Jeff Noxon, wherever you are. I built my interface using his schematic without incident. The most challenging part was mounting the SAE J1962 connector in my project box. I got that weird-ass connector here.
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Old January 5th, 2004, 19:34   #4
MOGolf
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Default build your own interface plans???

When I built one, I put the works in a project box from Radio Shack, spliced it into a straight through DB9 cable, and used one of their OBDII-DB9 cables. Since they have a $50 minimum order, GeWilli got several at one time for us. This method removed concern for getting connectors to fit into the box.

Yes that design works great and appears to be identical to the basis of the interface sold by LanduytG. That latter has LEDs added to indicate status of power, K-line and L-line.
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Old January 6th, 2004, 15:42   #5
Jeef
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Default build your own interface plans???

thanks for the help guys the parts are on order! Did you guys etch your own boards?
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Old January 6th, 2004, 16:48   #6
MOGolf
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Default build your own interface plans???

Some have etched the boards, others have just wired the parts together. The Radio Shack project box I used came with a prototype board to fit inside. The board is perforated, with soldering pads around each hole. I just mounted all the parts and wired between them with small gauge wire wrapping wire (also from Radio Shack).
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Old January 12th, 2004, 18:31   #7
Locosmotion
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Join Date: Jan 2003
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Default build your own interface plans???

I etched my board works fine now. I had some trouble as the site listed above shows the wrong NTE part number if you choose to use their opto-isolators. Simply go to NTE's site and cross reference the NEC numbers to the correct NTE number as I understand it the correct part is a closer match to the NEC and has only recently(2 months or so) been available.
Phil
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Old January 19th, 2004, 08:09   #8
JetA_Jetta
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Join Date: Dec 2003
Location: NH, USA
TDI(s): '04 Jetta
Default build your own interface plans???

Have any of you guys found any shortcomings in your adapters that you built that you think would be overcome by purchasing the "dongle" made by Ross-Tech?
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Old January 25th, 2004, 20:31   #9
EtherNut
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Join Date: Aug 2002
Location: Richmond, Kentucky
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Default build your own interface plans???

I'm pretty sure ours won't work in "fast" mode as the old "opto" style prevents that. But I've never needed it. I don't do butt dyno graphing and stuff like that..
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