Great write up Ben, its good to see the use of the scope expand.

Feel free to upload the waveform I sent to you.

Neil

Kim,

Completely get the copyright laws.. The description of the contents is good and gives a clearer picture of what applicability or use it could have.

Thanks again, this has been a good topic thus far and appreciate the insight.

Neil

Hello Kim, I’m pasting part of your post: To understand the meaning of the 8 data bytes you must have some background knowledge and by that I mean the correct SAE J1939DA document from SAE.ORG - without this document it will be difficult to find head and tail in the interpretation of for example off...

Here's a couple similar scenarios where the NOX sensor was the victim part however due to varying circumstances such as poor fault tree diag from engineering, lack of knowledge/service information, poor communication (people) machinery had multiple NOX sensor replacements before getting the repair r...

Thanks for the input, The reason I keep wondering about these sensors I’ve have “seen” hundreds of these changed and in many cases the sensor was the victim, as for the scan tool test, Mack/ Volvo also offers a NOx conversion test that more or less checks the health condition of the SCR and NOx sens...

I did read your post and would agree with your approach, so I think what my question is now, is it possible to take reading directly from the sensor and bypass the module that converts those signals into CAN messages? Would that be beneficial? Could that type of testing be used to support or contrad...

Currently no issues, I plan on digging more into the CAN system as Ben posted about, what approach /process do you use when troubleshooting smart sensors? How do you use scope and scan data to troubleshoot smart sensors.

Open question... Has anyone had or currently have a good method for diagnosing "smart" sensors? Sensors that are equipped with their own module, which in-turn communicates on the CAN network, examples would be the NGK/Continental NOx sensors, NH3 sensor and/or particulate matter sensors. Examples of...

mxx20 if possible use the slow time to experiment with the scope on a new semi, can start to build a portfolio of know good wave forms.

Thank you Steve...