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ALDL data reading issue

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Old Jul 30, 2011 | 02:41 PM
  #1  
Americanmouse's Avatar
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ALDL data reading issue

I can't get my Acttron scanner to read codes let alone do any live data reading. But it will do the service light check/engine light test, and that works fine.
I did have this issue about a year ago, and then all of a sudden my scanner just starting reading both codes and live data. Although its been a year since I used my scanner, I don't think I'm doing anything different than last time, but unlike last time it started working after a couple of days of playing around with it. Where now I've been playing with it for a couple of weeks, with no results other than the service light/engine light test working.
So does anyone have any suggestions as to why this is happening, and/or what I can try to get this issue resolved.
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Old Jul 30, 2011 | 03:34 PM
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Re: ALDL data reading issue

to get the codes to flash it is a short between A & B terminals of the ALDL connector.
To get data out you need a 10K resistance between them IIRC.
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Old Jul 30, 2011 | 03:45 PM
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From: Chicago south suburbs
Car: 1988 IROC-Z28
Engine: L98(383tpi) modified
Transmission: 700R4 rebuilt
Axle/Gears: 3:73 10bolt rebuilt
Re: ALDL data reading issue

Thanks for replying!
Could you be more specific as to what I need to do, or direct me to a link on directions of how to get use/install etc. the 10k resistance so I can read the data?
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Old Jul 30, 2011 | 11:28 PM
  #4  
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Re: ALDL data reading issue

Here are some good threads describing what the problem could be.
https://www.thirdgen.org/forums/diy-...g-165-ecm.html

Good reading here:
https://www.thirdgen.org/forums/diy-...w-connect.html

And some more here:
https://www.thirdgen.org/forums/diy-...-but-cant.html
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Old Jul 31, 2011 | 11:28 AM
  #5  
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From: Chicago south suburbs
Car: 1988 IROC-Z28
Engine: L98(383tpi) modified
Transmission: 700R4 rebuilt
Axle/Gears: 3:73 10bolt rebuilt
Re: ALDL data reading issue

I'd like to try doing this 10k resistance, but I don't know what I need exactly or how I need to connect this 10k resistance to A and B terminals. Does anyone have pictures, and/or link/s to do this?
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Old Jul 31, 2011 | 12:25 PM
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From: Grand Rapids MI
Car: 88 IROC-Z
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Transmission: T56
Axle/Gears: Ford 9" Eaton truetrac 3.50
Re: ALDL data reading issue

On the USB ALDL cable I had it had a jumper for 10k the autoprom I use now it has a jumper for 10k also so either theres something in the software or its a jumper to do 10k to get the info flowing. post some pics or a model # of this scanner.
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Old Aug 1, 2011 | 08:06 PM
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From: Chicago south suburbs
Car: 1988 IROC-Z28
Engine: L98(383tpi) modified
Transmission: 700R4 rebuilt
Axle/Gears: 3:73 10bolt rebuilt
Re: ALDL data reading issue

Here's pics of my scanner, and as I said it did read codes and do live data on my Camaro a few of times a year or so ago.
[ATTACH][ATTACH]ALDL data reading issue-100_2030.jpg[/ATTACH][/ATTACH]
Attached Thumbnails ALDL data reading issue-100_2028.jpg   ALDL data reading issue-100_2029.jpg  
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