Scan Tool Does Not Communicate With Class 2 Serial Data Line

Scan Tool Does Not Communicate W/Class 2 Data Line (Part 1 Of 4):

Scan Tool Does Not Communicate W/Class 2 Data Line (Part 2 Of 4):

Scan Tool Does Not Communicate W/Class 2 Data Line (Part 3 Of 4):

Scan Tool Does Not Communicate W/Class 2 Data Line (Part 4 Of 4):