PONTIAC TRANSPORT COMPUTER READ CODE

I Am Trying To Scan My Car And It Does Not Work. I Have Been Trying Jump The A And B In The Scan Plug, With A Wire To Start The Diagnostic...

I Drive My Van & It Gets Warm It Stalls & Doesn't Start Up Until It Sits For At Least 30 Mins. I Stuck The Two Wires To Get A Code Reading...