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Topic: 2001 U320 diagnostic protocol  (Read 794 times) previous topic - next topic

2001 U320 diagnostic protocol

Does anyone know the engine diagnostic  protocol for a 2001 U320 ISM 450? J1939 or what other diagnostic protocol? Will end up with a Silverleaf but would like to purchase just a plain Affordable stand alone scan tool for now. If someone can recommend a affordable scan tool that would be very helpful. Thank you in advance
Scott

Re: 2001 U320 diagnostic protocol

Reply #1 –
OK, I have only used the commercial quality Cummins Insite software which is pretty expensive and  the VMSpc software. With either you need an J1979 interface and a Windows laptop. For the money I would buy the Silverleaf  JIB interface from forum member Roger Engdahl, download the free VMSpc software from Silverleaf Electronics on your laptop and your done. You can use the diagnostic tab without setting up your screen.
Or you can use the factory diagnostic buttons found on most coaches which will give you flash codes that you can decipher for free info found on the net. One switch for the Cummins and one for the Allison.
Google is your friend. Search Cummins flash codes.
Steve & Sandy
2003 U320 4220 WCDS, build#6160
Motorcade #17794
USMC '67-'71

Re: 2001 U320 diagnostic protocol

Reply #2 –
Seems all roads end up at the same place. I have been in in contact with Roger and seem to end up back there regardless.. This was for a Prepurchase
.  If I had title in hand it's a no brainer. Will probably need for return trip home also. Thank you for your input, it helps
Scott

Re: 2001 U320 diagnostic protocol

Reply #3 –
I am not sure if there is a list, probably is, but I don't know if Silverleaf has one.  The codes are engine and transmission specific.  VMSpc will display and save codes with a description.  I got some for awhile that reported low potential (voltage) at injector 6.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: 2001 U320 diagnostic protocol

Reply #4 –
Might be an alternative.  There are many scanners available, here's one I've found useful.  These work as real time fuel computers with selectable readouts for rpm, boost etc.  They also scan codes  BUT!  It's still necessary to look up the codes to see what they are referring to.  Not normally a problem, but I expect the silver leaf is a more slick interface.  One nice thing is....plug it in, it comes online.  No computer required.

ยป ScanGauge D
"Not so  long ago we were a nation of risk takers, riding five million pounds of  thrust straight into space."  Joe Gresh
Chuck Pearson
1996 U295
2018 Can Am X3 TurboRS

Re: 2001 U320 diagnostic protocol

Reply #5 –
ScanGauge D
$169.95
J1939 & J1708 Vehicle Monitor
Large diesel powered vehicles such as diesel pusher RVs and over-the-road long-haul trucks
Compatible with the J1939 & J1708 protocols
Okay so we are the J1939 protocols? Or was that the J1708 Protocols. I still know where I'll end up, ordering from Roger but this is what I wanted to before I'm obligated to purchase the coach. If it will read codes numbers I can look them up.
Scott

Re: 2001 U320 diagnostic protocol

Reply #6 –
On my Cummins ISB in my truck I to got a low voltage fault. Ended up changing #6 injector no help. It was the connector at the valve cover gasket connection. Replaced valve cover harness and both connectors. Problem solved 250k miles and truck was from Michigan for 140k miles prior to me.

Re: 2001 U320 diagnostic protocol

Reply #7 –
So would the 2001 U320 be the six or nine pin connector?
Scott

Re: 2001 U320 diagnostic protocol

Reply #8 –
Nine pin.  2001 ISM11 has both protocols.  These are what is possible on J939.  Only some on the ISM11, enough.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: 2001 U320 diagnostic protocol

Reply #9 –
Quote from: dsd –
So would the 2001 U320 be the six or nine pin connector?
Scott
The scan gauge comes with both. I bought this one back in 2015 before I heard about Silverleaf. I will be putting it up for sale.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 2001 U320 diagnostic protocol

Reply #10 –
Well, since this was Scott's thread, I will say that my VMSpc will be here today so you can check it out when you want Scott, to compare it to the Silverleaf.
Keith
2003 U320 38' #6197
 

Re: 2001 U320 diagnostic protocol

Reply #11 –
Any current feedback on the Scangauge D?  I'm struggling with the unreliability of Bluefire and it appears that VMSpc is no longer an option.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI