Tried to do SPS/TIS programming, etc. with my GM Tech 2 scanner. But I cant get it to work when i connected to my PC with windows XP system! Stupid serial ports, I don’t know why GM has not made the Tech 2 USB yet. Most computers don’t even come with legacy ports anymore.
It’s almost as if the Tech 2 knows the PC is there, but the PC doesn’t know the Tech 2 is there. Because when I plug it in and turn on the Tech 2, it says “waiting for download” for a second on the tech 2 screen. When I try to connect with the PC, it hangs for a second then says “cannot connect“.
Surfed the Internet and read many posts.
And finally found that there is a setting that is kind of hard to find that will set COM port.
It’s under CONFIGURATION>I/O MANAGEMENT>TECH2>PROPERTIES.
If you do need the dongle and don’t have one, it will error with:
E666: Access to Service Programming Server was denied.
I happened to meet with this issue before. This can also mean it doesn’t “see” the dongle, and you forgot to install the dongle driver.