canbus layout

[Snakebitten]

Its a bit pricy, but you could buy a Comma3X. One of its many functions is that it logs every signal on the canbus network the entire time you are driving.

probably wouldn’t have much trouble selling it when you are done.

I must ignore this post.
I must remove from my memory.
I must not screenshot or bookmark it either.

That's a heck of a side function.

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[RomeoZulu]

I'll pass, I'll play the warranty game...

 

[RomeoZulu]

Its a bit pricy, but you could buy a Comma3X. One of its many functions is that it logs every signal on the canbus network the entire time you are driving.

probably wouldn’t have much trouble selling it when you are done.

I'll pass, I'll play the warranty game...

 

[OleMustyBag]

From what I have found each module communicates with sensors and lights directly via LIN bus and the modules communicate with other modules via LIN bus through the gateway module (like a network switch) the modules are grouped on HS network runs that communicate LIN signals to other modules. Once upon a time I had seen a diagram or breakdown of the groups. (I can’t find it but if I do I will post)
I would first verify your battery is good low voltages will cause serious problems and modules to shut off.
If the dealer can’t figure it out try getting a mongoose cable and FDRS subscription.
-Try updating your modules
-Try GWM update and repair
-FDRS shows how the modules are grouped and also has a feature to do a network test.
-Also with FDRS try the write VIN procedure because sometimes modules get corrupted ( I had this happen after an update that caused the side obstacle detection not to work, rewriting the VIN fixed it.)

Disclosure I am not a mechanic these are just things that have worked for me when modding and messing around with my truck.

 

[Eighthtry]

Just an example of Ford failing to do their software homework. It probably needs to be outsourced. There are plenty of bright programmer options available. Why Ford wants to write their own software is above my ability to imagine. Other automotive companies have been much more successful at this. I do not know common practice in the industry.

Common function and software generation might be of some value. Our 10 speeds, if they hold up, are a great example of cooperation among manufacturers.

 

[RomeoZulu]

Gotta like Ford pass...
It's a great tattle tail that calls your bullsh!t if you're trying to bs service writers and techs when you've effed up...
It's also very useful for techs to narrow down and focus closer to the problem. It has been sending data about the problem in my truck every time it so much sneezes. (Multiple time each time I drive it)

Truck is booked in Friday for more in depth work to solve the issue. Body control module is a likely culprit because multiple other modules are latch loss of com DTC codes.

 

[RomeoZulu]

Just an example of Ford failing to do their software homework. It probably needs to be outsourced. There are plenty of bright programmer options available. Why Ford wants to write their own software is above my ability to imagine. Other automotive companies have been much more successful at this. I do not know common practice in the industry.

Common function and software generation might be of some value. Our 10 speeds, if they hold up, are a great example of cooperation among manufacturers.

 

[RomeoZulu]

Update: My truck is at still at the service department awaiting a road test to verify Ford engineering request to configure GWM, BCM, IPC and APIM due to the U codes commonly seen for the brake controller power fault. The lead tech speculated the problem 'could' be influenced by OTA updates.
Further, my service department had three trucks in for the same problem. If mine was fixed with the configuration, the others would then get the same process. The weather here in the Vancouver area was not optimum for dealer techs to carry out the required road test. (abundance of caution with 12 " of fluffy white stuff on the ground) They kept the truck to complete the test when conditions improved,

 

[Snakebitten]

Sceptical.
Sorry.

Not that you don't have the codes. That I believe.

 

[RomeoZulu]

Sceptical about what exactly?

 

[TooDah-Tex1]

You are not alone My trailer brake fault have been a problem since 6.1 update and is now at a second Dealership with a Ford Tech Helping to resolve it but nothing of yet since January 2nd will post if and when I get it resolved.

 

[HammaMan]

FDRS has a bus test tool that when run looks for bus drop-outs so you can jiggle connectors and what not to see if there's a problem with a connector. It's kind of like a continuous ping function.

 

[RomeoZulu]

After some elapsed time an update:

Trailer control module replaced,No Fix
Then, APIM, TRM, BCM recoded per Ford engineering, No Fix
Last week, Same dealer tech revisited the issue and concluded Gateway control modue might be faulty.
Gateway control module was then replaced, multiple days of follow up driving by dealership to verify was completed.
Fault seems to have been rectified..

Early on, the Gateway control module did have a latched fault code which gave weight to reolacing that module to be replaced.
RZ

 

[rjinaz]

FDRS has a bus test tool that when run looks for bus drop-outs so you can jiggle connectors and what not to see if there's a problem with a connector. It's kind of like a continuous ping function.

The Ford "wiggle test" has been around for decades.
Back in my days as a mechanic, it was literally taught on day one for random faults.
Turn the effected system on and start wiggling the harness and connections.

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