stumped, 4l80e TCC lock up issue
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
ok i just notice in the trans diagnostics it will max line pressure if it sees a maf fail, so I have disabled those...now i'm just scratching in the dirt really...will try again tomorrow
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
no joy. back where i started. i can command a lock up but no lock up otherwise.
i guess my next step is flash the tune from the other, non-turbo, 5.3/4l80e truck and see if it'll lock that converter.
or I could just wire a switch to throw pin S to ground and be done with it! but nooo i gotta try and make it all work correctly
i guess my next step is flash the tune from the other, non-turbo, 5.3/4l80e truck and see if it'll lock that converter.
or I could just wire a switch to throw pin S to ground and be done with it! but nooo i gotta try and make it all work correctly
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
I am not, and that is one of the reasons I'm having a hard time figuring it out.
I can add TCC Mode as a channel, but I can't seem to find it in gauges. Is there another place I can log it?
or can I just view it in the channels "value" ?
I can add TCC Mode as a channel, but I can't seem to find it in gauges. Is there another place I can log it?
or can I just view it in the channels "value" ?
Last edited by truckdoug; Oct 1, 2016 at 11:44 AM. Reason: oops I think i figured it out
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
gotcha. yeah i was just getting used to 2.24 when they switched. still learning.
heck i'm just a baby to this whole computer tuning thing, but dang its it great when you figure it out!
it's wet out today, will report back when I can take it for a drive.
Thank you for your help. I really appreciate it.
heck i'm just a baby to this whole computer tuning thing, but dang its it great when you figure it out!
it's wet out today, will report back when I can take it for a drive.
Thank you for your help. I really appreciate it.
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
finally a dry day to take the turbo truck out.
i was logging the TCC mode and it never changed from "off"
could there be a DTC I accidentally disabled to cause that?
i was logging the TCC mode and it never changed from "off"
could there be a DTC I accidentally disabled to cause that?
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
rigged up a switch to ground trans pin S, works great. not sure what I goofed up in the tune to cause this, but it's not a daily driver so no biggie.
if I ever figure it out i'll dig this thread up and post for posterity, lol
if I ever figure it out i'll dig this thread up and post for posterity, lol
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Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
well the drag radials are fun, but they didn't help the TCC lock
not real sure what my next step is.
my logic is
if I can command it locked my wiring ought to be good and i can eliminate that as the issue.
so cross wiring issues off.
cross mechanical issues off
that leaves me thinking it's the tune (or possibly the PCM itself)
so to eliminate the possibility it's the PCM i will flash it with my daily driver's tune (same base OS, 5.3/4l80e) and see if it locks the TCC
at that point it's got to be an issue with the tune or trans segment.
not real sure what my next step is.
my logic is
if I can command it locked my wiring ought to be good and i can eliminate that as the issue.
so cross wiring issues off.
cross mechanical issues off
that leaves me thinking it's the tune (or possibly the PCM itself)
so to eliminate the possibility it's the PCM i will flash it with my daily driver's tune (same base OS, 5.3/4l80e) and see if it locks the TCC
at that point it's got to be an issue with the tune or trans segment.
Bumping this Im having same issue. Checking if anyone had this issue and solved the problem. Only thing maybe different is mine locked up briefly by itself without command on a handful of occasions.