Yea Mr. Data...I had the same issue....I used the female spade to connect the 1 and 2 terminals in the datalink port and never got any engine code blinks...nothing...and it was right  after the Speedo/VSS did its zero mph thing.  It clearly has a code being sent as it occurs but I could not get anything to display using the datalink immediately afterwards.   Could it possibly need to bridge other terminals in the datalink port...besides #1 and # 2?