CompleteTruckNewbie
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- #1
the instructions I followed were from this post: https://www.f150gen14.com/forum/threads/add-trailer-brake-controller-to-2024.24864/post-610065
After futzing with it a bit, I realized that "load backup you took in step 1 for the new TRM" was where I was having an issue.
After connecting to TRM I selected "load all" from the backup and the mostly FFFF read from the replacement controller would show as different values, so I have a good backup and it's loading. I then made the 1 bit change (a 0 to a 1 in my case) and selected "write all", then did the IPC, etc...
when it didn't work I reconnected to FORScan and saw that there were still many FFFF, so somehow the Write All didn't do what I expected:
(yes I run FORScan in linux using Wine)
I loaded the saved values into FORScan again, changed my 0 to a 1 and wrote just than one block. I worked (my 1011 30EC was now 1011 31ED), but I noticed that doing this write had reset all the other blocks in FORScan to FFFF again (except the checksums of course)
I tried to load again and this time write the 791-01-02 register without a change, and once again the other addresses got reset to FFFF.
So what I did to fix it in the end was to reload the saved values, but I saved the bottom block 791-04, then saved 791-03, then 792-01, then finally saved 791-01 with the 1 bit enabled, and things looked OK after that. I made sure the IPC was done as per the instructions, and now I see the gain change when I press +/- and I get "Trailer not connected" when I squeeze the controller, so I think I'm all good
Don't know if the way to load the previous controller data is something known that this newbie didn't understand, but maybe this will help the next newbie...
After the first try I had DTCs in the TRM and the truck didn't act like it had a TBC
After futzing with it a bit, I realized that "load backup you took in step 1 for the new TRM" was where I was having an issue.
After connecting to TRM I selected "load all" from the backup and the mostly FFFF read from the replacement controller would show as different values, so I have a good backup and it's loading. I then made the 1 bit change (a 0 to a 1 in my case) and selected "write all", then did the IPC, etc...
when it didn't work I reconnected to FORScan and saw that there were still many FFFF, so somehow the Write All didn't do what I expected:
(yes I run FORScan in linux using Wine)
I loaded the saved values into FORScan again, changed my 0 to a 1 and wrote just than one block. I worked (my 1011 30EC was now 1011 31ED), but I noticed that doing this write had reset all the other blocks in FORScan to FFFF again (except the checksums of course)
I tried to load again and this time write the 791-01-02 register without a change, and once again the other addresses got reset to FFFF.
So what I did to fix it in the end was to reload the saved values, but I saved the bottom block 791-04, then saved 791-03, then 792-01, then finally saved 791-01 with the 1 bit enabled, and things looked OK after that. I made sure the IPC was done as per the instructions, and now I see the gain change when I press +/- and I get "Trailer not connected" when I squeeze the controller, so I think I'm all good
Don't know if the way to load the previous controller data is something known that this newbie didn't understand, but maybe this will help the next newbie...
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