We found the older CAT ET SIS 2017 version quite frankly a little buggy. The Caterpillar SIS parts searches were either painfully slow or CAT SIS would just hang, freeze be brutally slow! And in some cases you would get the dreaded CAT ET SIS license has expired or "Not allowed to connect to an ECM on the data link. This program is not licensed."
The newer CAT ET SIS 2018 Version frankly is the most stable version we have ever used. So if you are pulling your hair out with one of these older versions... have faith the new 2018 if installed correctly works like a charm!
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This means you have communication error between your CAT II / III adapter and the CAT ET Sis software setup. Usually it is a simple fix.
- In the CAT software go to UTILITIES => PREFERENCES => COMMUNICATIONS
- CHOOSE: CATERPILLAR COM ADAPTER II
- CHOOSE under PORTS: COM 7
- Click "OK"
- Restart the computer and usually that is all you need to do.
But if the above steps do not work, then your adapter is setup on a different COM PORT. In which case watch the video below on how to find which com port your CAT II / III (317-7485 or 317-7484) adapter is using and match it with the CAT ET SIS software to fix the CAT #142 error message.