Keith Browning Posted November 10, 2020 Share Posted November 10, 2020 Preface: My dealership still won't buy an VCMM package, but that is another topic for another day. I have a tough diagnosis going on with a 2020 F250 with a 6.2L in progress. I haven't needed to scope a crank sensor in quire a while and the last CKP sensors I looked at were 6.0L diesels. Fast forward to today I am looking at a 2020 6.2L using the old VMM - yes you can use the oscilloscope in stand alone mode - a 2020 Super Duty requires FDRS and the VCMM otherwise. Anyway, this engine has a three wire sensor and the signal is different than the older two wire sensors that produce a sine wave pattern. Unless I am mistaken. The examples of "typical CKP sensor signals" given in the IDS/VMM are probably outdated. Does anyone know of published examples that are more current? I am not sure WTF I am looking at! Quote Link to comment Share on other sites More sharing options...
jw33 Posted November 11, 2020 Share Posted November 11, 2020 Out of curiosity why wont your dealer buy the vcmm package? I cant imagine doing some things without it mostly the vibration analyzer. Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted November 11, 2020 Share Posted November 11, 2020 I am guessing the waveform example in the PC/ED is not helpful? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted November 11, 2020 Author Share Posted November 11, 2020 9 hours ago, 8WA Sman said: I am guessing the waveform example in the PC/ED is not helpful? Not for lack of effort, I cannot find any. I looked in the appropriate pinpoint tests and sections... still looking. It makes sense these examples would be published so if you know exactly where I can find them please let me know. The only depiction I can find is in the PCED section 1, Ignition Systems, Overview but its a drawing, not a scope screen capture or example. Finding a like vehicle for comparison at this moment is proving difficult. I also downloaded the VMM software even though I can't use it, looked in the Reference Recordings session only to find it empty. Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted November 11, 2020 Share Posted November 11, 2020 That is what I found also. I didn't find a known good for a 2020 either. Can you post what you have? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted November 11, 2020 Author Share Posted November 11, 2020 My FSE is involved, I spoke to him this morning and have not heard back in 4 hours. Said he would check his resources... Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted November 11, 2020 Share Posted November 11, 2020 Is this what you are looking for? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted November 12, 2020 Author Share Posted November 12, 2020 YES! Just for clarity, what were your probe connections? What I got looks nothing like that in fact it looks nothing like a sine wave. Also I am using the old VMM oscilloscope in stand alone mode since IDS wont work with a 2020 but I assume a scope is a scope and I should get the correct results regardless. Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted November 12, 2020 Share Posted November 12, 2020 That is on the vms software. I did not make it. If you open it and click on waveform library there is one for a 6.2. I’m assuming the top 2 are cam sensors and the bottom one is crank. Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted November 12, 2020 Share Posted November 12, 2020 Your signal looks like a hall affect with no gaps. I noticed the parts cat lists 2 tone rings based on the build date? What is the symptom? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted November 12, 2020 Author Share Posted November 12, 2020 1 hour ago, 8WA Sman said: Your signal looks like a hall affect with no gaps. I noticed the parts cat lists 2 tone rings based on the build date? What is the symptom? surge/rolling idle build date 8/2/20 Quote Link to comment Share on other sites More sharing options...
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