I have been looking at the Silver Leaf VMSpc program that you run on your computer which monitors a lot of things going on in your coach (engine and tranny). For the software to work correctly, it needs to be plugged into the diagnostic plug that is part of the Spartan Chassis. Per Silver Leaf, I should have the round diagnostic plug in my MH. I have a 2002 Winnabago Ultimate Advantage 36C with a Cummins ISC350 on a Mountain Master Chassis. I have searched under the dash but, can not find the plug which they say is round in shape. Are there any other 2002 Ultimate Advantage owners out there who have found the diagnostic plug in their unit. If you have would appreciate any help as to where you found it. Is it loose under the dash, part of some module under the dash area. Color of it -- silver/black ? Silver Leaf says that is should either be a 6 or 9 pin plug. Any help that someone could give me would be greatly appreciated.

I've linked this to the Winnebago forum for more exposure.

I have an 04 Advantage and installed the Cummins Road Relay system which gives similar information as the Silver Leaf. I found the plug under the dash left of the steering column and it is gray. You may have to look behind the heat/air hoses.

I have the same chassis and have been on the same search. I'm now down to cutting into the bundles to find the plug.

Whoever built this one, never intended for anyone to find or use that plug.

Argggghhhh!!

There should be an additional connector in the engine compartment, to give you an idea of what it looks like.

Jim

If you have any luck I would love to know what bundle it was located in. I am like you -- I don't think anyone wanted us to find and use this plug. Even the guys at Cummins South could not find it when I had the MH in -- they did not spend a lot of time searching for it but, it was not where they thought it should be.

David, today I went into the dash with a vengence and still NO ROUND ENGINE CONNECTOR.

But I did find a FLAT 6 pin weather pack connector right next to the steering wheel column. A call to my buds at Cummins told me that could possibly be the connector for the engine diagnostics.

I'm making a plug to adapt that connector to my QuickCheck II that I have and will let you know if it works.

Jim

I will be interested in the results of what you do. If it works, would love a picture of what you did. I have had some back surgery and have not been able to go looking again for the past few weeks.

Jim and David,
I too would be interested in whatever you find. Thanks

Sorry guys, but that flat weather pack connector was not the ECM connector.

I read out the pins while the engine was running and didn't get the 12v keyswitch, 12v, or J1587 signals on any of the pins.

I'll keep looking but I'm about ready to give up. I have a Road Relay 4, with a cable run all the way to the back of the coach. I wanted to wire it in to the front connector, but can't find it.

I'm thinking I might just live with it as is.