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Old 12-13-2014, 03:30 PM   #1
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DeWat's Avatar
Tiffin Owners Club
Join Date: Mar 2012
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J1939 PID Codes

Anyone know where I can find a list of the PIDs output on the J1939? Yes, I have searched the 'net, but I must not be using the right search words. My search started because I want to know the difference between VMSpc's "Instant MPG" (PID 184) and "Rolling MPG" (PID 9), which are both supposed to be instant MPG readings (I'm still looking for that difference also). I did find something that leads me to believe that PID 9 is fuel rail pressure, but I'm not 100% that I'm reading that right either.

Dewey & Sharon
Southern Maryland suburbs of DC
2015 Tiffin Allegro Bus 45LP
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Old 12-13-2014, 06:57 PM   #2
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You've got J1939 and J1587 confused. PID's are a part of the J1587 standard, not J1939. Do a Google search for:

AN1230 J1587 PID

and you will get a link to a PDF (AN1230) that has the J1587 PID's of interest.

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