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codes, computer, etc.

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Old Oct 20, 2005 | 12:28 AM
  #1  
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Default codes, computer, etc.

What program do I need for my laptop to be able to read codes on my vette..you guys are always talking about readiing them, I am in the dark here?
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Old Oct 20, 2005 | 12:40 AM
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You don't need a PC to read the codes, depending on the year and connector, there's a way to do it.
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Old Oct 20, 2005 | 11:20 AM
  #3  
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If it is an LT1 here is bogus's write up
http://www.c4guru.com/articles/CCMCodePull.pdf
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Old Oct 20, 2005 | 12:57 PM
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His is a 95, so it will be different. He has ODB-II. We need to find the one for 94-96.

Your display and DIC will provide the codes for you by jumping certain pins on the DLC connector.
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Old Oct 20, 2005 | 02:57 PM
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Originally Posted by 93JetJocky
His is a 95, so it will be different. He has ODB-II. We need to find the one for 94-96.

Your display and DIC will provide the codes for you by jumping certain pins on the DLC connector.

95 is ODB-I even though he may have the ODB II 16 pin connector.
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Old Oct 20, 2005 | 05:58 PM
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I knew there were differences. Thx

Hasn't anyone created a code pull document on how to do this for the later models?
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Old Oct 21, 2005 | 01:00 PM
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Found this in one thread

On the 16 pin ODB II type connector, which you will find on the ODB I 1995 car, you short pins 4 -12.

Then you do the following to see the codes on the digital display:

"The '95 is a "sort of" OBD I. Short the two pins with a paper clip.
Turn on the ignition. Section 1 is the CCM (Chassis Control Module) and shows "C12" then any stored codes finishing with "---". Next is section 4, the PCM (Power Control Module) that shows any codes for the engine or trans. Section 9 is the braking controller finishing with "---". Last is section A which is the DERM (Air Bag Controller). Each section uses the same numbers (DTCs) with different meanings. Post the codes and the sections they show up in. We will help with meanings and ideas as to what to check."
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Old Oct 21, 2005 | 01:06 PM
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Is the DLC connector marked or is there a picture of the pin outs of the DLC? I know with mine I had to use the picture to orient it correct to find the pins.
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Old Oct 21, 2005 | 01:17 PM
  #9  
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Originally Posted by 93JetJocky
Is the DLC connector marked or is there a picture of the pin outs of the DLC? I know with mine I had to use the picture to orient it correct to find the pins.

On my car I also had to use a diagram and orient the DLC accordingly as the location under the dash is difficult to read specfici pin out #

The Connector

http://www.obdii.com/connector.html

Pin 2 - J1850 Bus+
Pin 4 - Chassis Ground
Pin 5 - Signal Ground
Pin 6 - CAN High (J-2284)
Pin 7 - ISO 9141-2 K Line
Pin 10 - J1850 Bus
Pin 14 - CAN Low (J-2284)
Pin 15 - ISO 9141-2 L Line
Pin 16 - Battery Power
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Old Oct 21, 2005 | 01:20 PM
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Excellent I bookmarked the link too. Thanks bunches this will help a lot of folks.
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Old Oct 21, 2005 | 01:44 PM
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Hmmm, is that OBD-II connector pinout looking from behind (wire side) or from front (pin side)??

The reason I ask is that pinouts on OBD-I connectors (looking from the pin side) are always shown with the opposite sequence of numbering, i.e. they start with A on upper right and proceed to F on upper left.
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Old Oct 21, 2005 | 01:50 PM
  #12  
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Originally Posted by 65Z01
Hmmm, is that OBD-II connector pinout looking from behind (wire side) or from front (pin side)??

The reason I ask is that pinouts on OBD-I connectors (looking from the pin side) are always shown with the opposite sequence of numbering, i.e. they start with A on upper right and proceed to F on upper left.

should be from pin side, in others words, as you are looking at the connector that is installed in the car.
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