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Obd Ii Connection Not Working

bamdoo

By bamdoo
in Ask A GM Technician

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bamdoo Enthusiast

bamdoo

Posted
Posted

I have a 2003 Envoy and the SES light came on. I tried using my OBD II scanner but it doesn't turn on when I plug it into the vehicle. I have used the scanner on my car before with no problems. I tested it on my wifes car and it worked fine. What could be causing the problem? Could it be the same problem that made the SES light come on? Your advice would be greatly appreciated.

 

Thanks,

 

Rob

Zembonez Senior Enthusiast

Zembonez

Posted
Posted

Are you sure your scanner is compatible? I know there are year breaks where a newer type of scanner is required. My Matco scanner won't work on an 06 model. Not sure how far up it goes... Anybody know?

minibike132 Senior Enthusiast

minibike132

Posted
Posted
Are you sure your scanner is compatible? I know there are year breaks where a newer type of scanner is required. My Matco scanner won't work on an 06 model. Not sure how far up it goes... Anybody know?

 

I'm not sure about aftermarket scanners and what you'll need presently and in the future but GM's communication architecture changed to CAN in 06. Anything 06 to present in the shop needs a CANdi module inbetween vehicle and t-2. Starting in 09 we will not be using the t-2 anymore but the new MDI module that will communicate with everything but there is no screen on the thing its a pass through to pc tool.

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Sorry to keep bumping but what model is your scanner?

Excellent call on that fuse.

 

I don't know what model it is but I will get a look at it and let you know. I would like to update it to work with newer models.

minibike132 Senior Enthusiast

minibike132

Posted
Posted
Sorry to keep bumping but what model is your scanner?

Excellent call on that fuse.

 

I don't know what model it is but I will get a look at it and let you know. I would like to update it to work with newer models.

 

 

Thanks the very last pin is the B+ and usually powered by the lighter. With all the stuff we plug into them nowadays their always blown.

 

All I was going to do is search the Matco site for an adapter but you can go there and see if you find one if not get me that model # and I'll see what I can find for you.

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