Tech 2 Purchase

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TJ Baker

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When connecting to our 02 Envoy it also takes several power cycles to connect. When it fails the DIC in the cluster indicates “Unknown Driver”, the security warning illuminates and all the gauges go flat. When I power down the tech2 all is well.


Does it matter what operation you are attempting, ie: SPS vs Diagnostics etc.?
 

George B

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Does it matter what operation you are attempting, ie: SPS vs Diagnostics etc.?
The issue occurs when first connecting. With the Candi it doesn’t see the candi and without it doesn’t connect to the vehicle correctly. After a couple tries it connects and all seems to work ok.

But I don’t trust it to not brick something on me someday.
 
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George B

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Was checking the alcohol content in my fuel tonight and the truck suddenly indicated to service the side blind zone system. I powered the tech2 off and restarted the truck. We t back in and all is well. WTF is wrong with this thing?

BTW the seller chinacardiags is no help…
 

TJ Baker

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The issue occurs when first connecting. With the Candi it doesn’t see the candi and without it doesn’t connect to the vehicle correctly. After a couple tries it connects and all seems to work ok.

But I don’t trust it to not brick something on me someday.

It is your phrase "first connecting" that I was trying to pin down.

When you power up the Tech 2, there is no "connection" by which I mean that there has been zero communications between the Tech 2 and anything in the truck. If you select say Diagnostics, the select your year, vehicle type, powertrain, engine, transmission, Transfer case, Data Display (example), Engine Data Display,,,, up to this point there has been no communications attempted by the Tech 2 and the vehicle.

Only when you select, for example "Engine Data 1",, where the next screen normally flashes "waiting for data", only then are communications attempted.

Is this where you get the error(s).
 
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Was checking the alcohol content in my fuel tonight and the truck suddenly indicated to service the side blind zone system. I powered the tech2 off and restarted the truck. We t back in and all is well. WTF is wrong with this thing?

BTW the seller chinacardiags is no help…
Do you have anything aftermarket wired into the vehicle, like stereo or anything not stock?

Sent from my SM-G930V using Tapatalk
 

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