WHY DOESN’T THE ULTRA-LINK DIAGNOSTIC TOOL SHOW ALL THE FUNCTIONS?
An older vehicle may not have all the functions available. The Ultra-Link Diagnostic Tool will display only those functions that are available on the electronic control module (ECM). SAE J1708 is the most common protocol, however, as the requirement for more information is demanded SAE J1939 is now starting to be used by more and more US manufacturers. In the not too distant future J1939 will become the more prevalent protocol as vehicle manufacturers expand the electronic information available on their diesel engines.
