well i just rebuilt my 305 tpi in my 86 iroc and when trying to set the minimum air and my idle when you are supposed to put the paper clip between terminals A and B i got it flip flopped cause i couldnt see the letters on top of the aldl so i assumed A terminal would be top left on aldl but i found i assumed wrong, i accidently put the paper clip between terminal F(''SHIFT Light/tcc solenoid) and terminal E(160 serial data output +5vdc)what would this do? did i fry the tcc selenoid?would this hurt the ecm?any help would be greatly appreciated!thanx,Joe

 

If someone were to hold a pistol to your head and demand that you short out two ALDL terminals OTHER than 'A' and 'B', the two you picked would be a fairly good choice.

Terminal 'E' is a 5VDC+ strobed output of serial data from the ECM, active whenever the ECM is in ALDL mode. Invoking that mode requires placing a resistance between terminals 'A' and 'B'. Since you evidently did not do that, any voltage at 'E' should have only been bleed voltage through a pull-up resistor in the logic circuit. I doubt that you have caused any damage to that.

Furthermore, terminal 'F' is the switched ground for either the "SHIFT" kight with a manual trans or the TCC solenoid for an auto trans. Unless you had the car moving at a light load at about 41 MPH when you jumpered the pins, the ECM should have never tried to turn on the TCC output, therefore, that terminal was never at ground potential. Even if there were a steady 5VDC supply at terminal 'E' it would have never been connected to ground.

You are fortunate.

The reason the ALDL terminals are referenced as they are is because the pinning was done for the PLUG half of the connection in left-to-right, top-to-bottom order. The socket half of the connection is necessarily reversed to match the plug.

 

Thanks alot that was very helpful