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Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

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  #1  
Old 02-20-2011, 01:28 PM
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Default OBD2 Code Reader Won't Link. Need Help.

Ok I have a 1996 Tahoe 4x4, 5.7 Vortec Engine and the service engine soon light is on and when I went to check the codes with my reader it powers on, but says no link. I had talked to my friend and he told me to try it on another vehicle and see if it will read it and if so to check all the fuses in my tahoe. So I hooked it up to my 97 Silverado and 96 Ranger and it worked perfectly. So I checked every fuse under the hood and in the dash in my Tahoe, and every one was good and I even followed the wires from the plug until it disappeared into the wiring harness and it all looked good. However, when I hook my reader back up to it, it powers on but continues to say "no link" everytime. Does anyone know what would make it do this??
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  #2  
Old 02-20-2011, 04:44 PM
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Welcome to the forum.

Wonder if it could be an ECM problem?
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2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

2007 Black Tahoe LTZ (Sold),
(GM flaps-$15, Lund Step Tubes-$80-For Sale)
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Old 02-20-2011, 08:42 PM
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Quote:
Originally Posted by 73shark View Post
Welcome to the forum.

Wonder if it could be an ECM problem?
just like shark might be ecm problem
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  #4  
Old 02-24-2011, 03:34 PM
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Well I checked my tahoe and it doesn't have a ECM (Engine Control Module) under the dash, it has a PCM (Powertrain Control Module) under the hood, right beside the fuse box and it says the only way to switch it is to take it to a dealership and have them switch it and reprogram it, but i'm not sure thats what's wrong and don't want to waste the money, because the only thing that isn't working right is it reads no link when I plug my code reader up.
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Old 02-24-2011, 03:59 PM
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Wonder if there's a wiring problem somewhere.
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2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

2007 Black Tahoe LTZ (Sold),
(GM flaps-$15, Lund Step Tubes-$80-For Sale)
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  #6  
Old 02-24-2011, 05:23 PM
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I have checked the wires under the dash and the wires that come out of the firewall and everything looks untouched. Does anyone know any other way to read the codes other than using a code reader, because I know on a vehicle that requires an obd1 reader, you can jump a wire across the ports in the plug for the reader and get the codes that way??
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Old 09-16-2012, 11:05 AM
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did you find answer too this problem i have same issue wont read wuth paper clip either
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Old 09-16-2012, 01:41 PM
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Quote:
Originally Posted by mrbearcat29385 View Post
did you find answer too this problem i have same issue wont read wuth paper clip either
OBD1 is the paper clip.
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Old 09-16-2012, 03:58 PM
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does your scan tool a internal battery to power it up?

If your sure the dlc has power and grd. With a voltmeter check voltage on the serial data line...pin #2 of the dlc. It should be less than 7volts. If higher there is a short to voltage on the serial data line.
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  #10  
Old 09-23-2012, 08:09 PM
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You missed a fuse...... cigarette lighter fuse is blown. It powers the diagnostic terminal. Let us know.....
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Old 09-23-2012, 08:09 PM
 
 
 
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