J1939 Network on Volvo D6 IPS


toofast

toofast

Active member
Hello and Happy New Year.

I am trying to interface my new Axium LH3 Display with my Engines to get my new Display to show a bunch of data (i hope) that my legacy Volvo Vessel View will not display.

So Raymarine helped me out, but now I just need to figure out what network is my J1939. I know a Volvo Mechanic should know, but in OHIO, they are hard to come by, plus hey, I like doing things myself.

I know it is a Deutsch connectors, but heck they all look the same.

Below are some pics under my dash, ECM's, etc. Who can point me in the right direction. As you can tell, I am a bit lost (I THINK)

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Ok, so yes we are on the right path...

I still cant seem where I PLUG the y harness into the J1939 network behind my dash
 
No expert, but the J1939 is a method of transferring data, much like the CAN buss and NEMA 2000. So if your current console is using J1939 then all connectors will data being transferred and only the data that pertains to the item connected to it will be used.

NEMA and CAN has all data constantly being moved, and just like a mail box, only the info with the right address goes to the item (gauge, display, other)

If (the big IF) this is the case, then any of the connectors can be removed and the Y can be installed. This would work with others, so just my guess. I would not do this until verified. Need an expert or need more reading/research
 
Yep right on...I am just worried that if I "splice" into the wrong network, I can damage my ECM/EVC, etc...which is big big $$

Trying to find an expert...but alas they don't exist in Ohio, or at least that I can find yet.
 
I'm assuming you have a Y connector included with the new interface. You simply add that to the output in your first picture (the one that says multilink). Downstream if you follow it you will see where to plug it in. There should be another connector that you unplug to add the Y. It's pretty simple and you can't damage anything.
 
jlanka said:
I'm assuming you have a Y connector included with the new interface. You simply add that to the output in your first picture (the one that says multilink). Downstream if you follow it you will see where to plug it in. There should be another connector that you unplug to add the Y. It's pretty simple and you can't damage anything.
Click to expand...

Yes a Y - so I dont unplug from the EVC - I follow downstream per your note....does it matter exactly where I cut into the network, seems to be quite a few junctions.

Then silly question, I assume I need 2 interfaces, meaning does the J1939 network combine both engines into one network or is it two separate. Thanks for helping.
 
toofast said:
Yes a Y - so I dont unplug from the EVC - I follow downstream per your note....does it matter exactly where I cut into the network, seems to be quite a few junctions.

Then silly question, I assume I need 2 interfaces, meaning does the J1939 network combine both engines into one network or is it two separate. Thanks for helping.
Click to expand...

Just 1 interface gets both engines. Doesn't matter where you cut in. There should be a 1 page instruction sheet included with the unit. There it will say which side of the Y to put the original connection and which side to put the new interface. If you get it backwards no big deal, just switch it.
 
jlanka said:
Just 1 interface gets both engines. Doesn't matter where you cut in. There should be a 1 page instruction sheet included with the unit. There it will say which side of the Y to put the original connection and which side to put the new interface. If you get it backwards no big deal, just switch it.
Click to expand...

Ok glad one interface...my 1 page instructions are horrid (not the same unit you have, I bought the Raymarine Version) but I realize that your ECM version and mine are most likely identical. So I will trace two multilinks coming from the ECM and try to find downstream where they combine and tap in after that.
 
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