I'm trying to diagnose an ABS light issue. I checked all the relays and fuses, and they are good. When I plugged a diagnostic scanner in,the message on the scanner was "Comminication error". Unable to establish communication. Verify the connection at the DLC and that the ignition is in the ON position". I checked them, and they were good. Any Ideas?

 

Were you able to verify the ground connections at pins 4 & 5 of the of the diagnostic plug were available and good.