John Deere Gen 4 mapping

[Bez515]

Has anyone else had trouble with the mapping on the JD Generation 4 display. Ours will not switch on when a spool is set as the trigger and it is put into work on float but switches on and off fine when it is pressured up and down. Its the same for all 6 spools.

 

[Ted]

Has anyone else had trouble with the mapping on the JD Generation 4 display. Ours will not switch on when a spool is set as the trigger and it is put into work on float but switches on and off fine when it is pressured up and down. Its the same for all 6 spools.

Had the same issue on a 6R we were using.
Made some inquiries with the Greenstar specialist and he conceded it was an issue pending a software fix.
Best solution he could recommend was to mount an external position switch on the drill and tap a signal line into a canbus line at the back of the isobus plug at the rear of the tractor.
I can't tell you exactly which line it was as I had lost interest at this point.

 

[Bez515]

Had the same issue on a 6R we were using.
Made some inquiries with the Greenstar specialist and he conceded it was an issue pending a software fix.
Best solution he could recommend was to mount an external position switch on the drill and tap a signal line into a canbus line at the back of the isobus plug at the rear of the tractor.
I can't tell you exactly which line it was as I had lost interest at this point.

Thanks, its more for top work than drilling. Seems a lot of trouble just to get it mapping. Cheers anyway

 

[benny6910]

The only way I can get it to work is to set a timer on the spool it doesn’t work if not

 

[Pheasant Surprise]

Had the same issue on a 6R we were using.
Made some inquiries with the Greenstar specialist and he conceded it was an issue pending a software fix.
Best solution he could recommend was to mount an external position switch on the drill and tap a signal line into a canbus line at the back of the isobus plug at the rear of the tractor.
I can't tell you exactly which line it was as I had lost interest at this point.

Sounds like something got lost in translation

I can’t fathom how a humble position switch (whether it’s just a set of reed contacts, 0v/12v or a pot) could talk to either of ISObus or CANbus?

The switch would need to be have an ISO or CANbus controller to be able to communicate on the bus - it’s only 2 wires but it’s basically a computer to computer serial network - not really for simple sensors or switches.

 

[Ted]

Sounds like something got lost in translation

I can’t fathom how a humble position switch (whether it’s just a set of reed contacts, 0v/12v or a pot) could talk to either of ISObus or CANbus?

The switch would need to be have an ISO or CANbus controller to be able to communicate on the bus - it’s only 2 wires but it’s basically a computer to computer serial network - not really for simple sensors or switches.

I know little of the intricacies and workings of ISObus and CANbus but it seemed a vague and hopeful solution. On a new tractor in this day and age the prospect of cutting into a line in the hopes of creating a mapping trigger seemed a bit disappointing. On our Fendts we can choose which spool and every function on that spool to initiate the start and end of mapping so we wouldn't expect anything less from another premium brand.
In the past we have taken a signal line from a external switch on an implement up to a Trimble FX 750 which had a dedicated signal input terminal to initiate mapping and that worked ok.
The attached picture is the back of the ISObus plug and highlights the line that was suggested that needed to be tapped into.

 

[benny6910]

I know little of the intricacies and workings of ISObus and CANbus but it seemed a vague and hopeful solution. On a new tractor in this day and age the prospect of cutting into a line in the hopes of creating a mapping trigger seemed a bit disappointing. On our Fendts we can choose which spool and every function on that spool to initiate the start and end of mapping so we wouldn't expect anything less from another premium brand.
In the past we have taken a signal line from a external switch on an implement up to a Trimble FX 750 which had a dedicated signal input terminal to initiate mapping and that worked ok.
The attached picture is the back of the ISObus plug and highlights the line that was suggested that needed to be tapped into.View attachment 700608

On my tractor there is a separate plug at the back of the isobus plug for the trigger to plug into.

 

[Pheasant Surprise]

On my tractor there is a separate plug at the back of the isobus plug for the trigger to plug into.

It’s wire 209 in a 2-pin weather pack plug according to the combine forum...

https://www.thecombineforum.com/for...jd-coverage-switch.html#/topics/150282?page=2

 

[benny6910]

Has anyone else had trouble with the mapping on the JD Generation 4 display. Ours will not switch on when a spool is set as the trigger and it is put into work on float but switches on and off fine when it is pressured up and down. Its the same for all 6 spools.

If you set a timer for how ever long you want then get it in to float it should work through your itec?

 

[Phil P]

I had a recording issue on my 6r although it had previously been working of the pto or scv! Found I had to disconnect the battery for a couple of second and rest everything and it started working again.

When it stopped working I only had the option of using the arms position as a trigger though. So not sure if it’s the same issue.

 

[Pheasant Surprise]

The attached picture is the back of the ISObus plug and highlights the line that was suggested that needed to be tapped into.

On my tractor there is a separate plug at the back of the isobus plug for the trigger to plug into.

Chaps just be mindful you're not inadvertently splicing into the ISOBUS loom. Its fairly easy to tell if you are because the wire colours are a dead give-away. The ISOBUS data wires (CAN high and low) are yellow and green. ISOBUS power wires are red and black (CAN +12v and GND). They run to a 4-pin Deutsch connector on the back of the ISO break way socket.

There will also be a thicker two pairs of red/black power cables going back to the battery relay for the implement high power circuit, into the implement breakaway connector. Usually through a round plug.

Photo below showing the rear cabling into a standard ISOBUS breakaway socket.

 

[Robt]

DO NOT PUT 12V input into the can wires in that 4 pin deutsch...!!!!!!!

 

[Pheasant Surprise]

DO NOT PUT 12V input into the can wires in that 4 pin deutsch...!!!!!!!

I was hoping that was nice and clear in my last post and hopefully no one goes splicing into the isobus loom.

Anyhow it was meant as a description of what to look out for and what not to do, as the photo above from @Ted looked very much like a rubber booted Deutsch 4-pin connector going into the back of the isobus breakaway socket.

For any external trigger wiring, my understanding is the correct connector fitted by JD, and as described elsewhere, with said white coloured wire(s) marked 209, was a 2-pin Delphi weather pack connector. If indeed it’s located on the back of the tractor near the spools or isobus socket, would look like this...

 

[GPS_Support_2014]

I know little of the intricacies and workings of ISObus and CANbus but it seemed a vague and hopeful solution. On a new tractor in this day and age the prospect of cutting into a line in the hopes of creating a mapping trigger seemed a bit disappointing. On our Fendts we can choose which spool and every function on that spool to initiate the start and end of mapping so we wouldn't expect anything less from another premium brand.
In the past we have taken a signal line from a external switch on an implement up to a Trimble FX 750 which had a dedicated signal input terminal to initiate mapping and that worked ok.
The attached picture is the back of the ISObus plug and highlights the line that was suggested that needed to be tapped into.View attachment 700608

If that’s the connector a Greenstar specialist is advising you to connect the implement switch then he’s not much of a specialist.

That connector contains ISO CAN wiring and implement ECU power supply only.

 

[Richard Smyth]

What pheasant surprise is saying is correct. I have used the weatherpak plugs on the rear of jd to set coverage switch on spud planters. It’s the only way to do it.

 

[Phil P]

What pheasant surprise is saying is correct. I have used the weatherpak plugs on the rear of jd to set coverage switch on spud planters. It’s the only way to do it.

You should be able to set an scv as the trigger and it will switch coverage on/of, I do it very often on my R when contract muck spreading. There must be a reason why it’s not worth for the op. Wondering what version of gs software he’s running.
Ps I can understand your situation if your actually using an implement switch on the share or something.

 

[Richard Smyth]

You should be able to set an scv as the trigger and it will switch coverage on/of, I do it very often on my R when contract muck spreading. There must be a reason why it’s not worth for the op. Wondering what version of gs software he’s running.
Ps I can understand your situation if your actually using an implement switch on the share or something.

The op is putting the implement into float on the scv. Jd won’t trigger the coverage on float from memory.

I had the implement switch on the lower ram on the drawbar. The machine runs on power beyond so no function being used to triggered coverage. It would have been fine if jd would allow coverage to trigger when activating auto steer but they don’t. I use this on my Fendt quite often.

 

[Pheasant Surprise]

It would have been fine if jd would allow coverage to trigger when activating auto steer but they don’t. I use this on my Fendt quite often.

Quite surprised that JD don’t, it wouldn’t require any additional wiring. All steering signals etc are on the CANbus available from the steering controller using PVED or similar.

 

[Phil P]

The op is putting the implement into float on the scv. Jd won’t trigger the coverage on float from memory.

I had the implement switch on the lower ram on the drawbar. The machine runs on power beyond so no function being used to triggered coverage. It would have been fine if jd would allow coverage to trigger when activating auto steer but they don’t. I use this on my Fendt quite often.

I’ll have to have a look at that, I’ve not tried using float as a trigger.

 

[Richard Smyth]

Quite surprised that JD don’t, it wouldn’t require any additional wiring. All steering signals etc are on the CANbus available from the steering controller using PVED or similar.

No idea why they don’t but they don’t. I know people who set th scv up for 1 second to activate it