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Old 02-22-2021, 05:10 PM   #21
Bus Nut
 
Join Date: May 2015
Location: Miami, Fl.
Posts: 357
Year: 1999
Chassis: Amtran / International
Engine: DT466E-Md3060
Painfull success !!1

So we swapped the TCM and the fuse does NOT blow!!!!

Tested key on engine off and we now have the check trans light working again...

Now ... a test drive!
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Old 02-23-2021, 08:36 AM   #22
Bus Nut
 
Join Date: May 2015
Location: Miami, Fl.
Posts: 357
Year: 1999
Chassis: Amtran / International
Engine: DT466E-Md3060
Pre-mature success...here we go again...

So the fuse does not blow anymore that is confirmed but the check trans light does NOT come on when the key is turned and ...no shifting...

Next thing were gonna check is the cables pins them selves, making sure they are all seated properly in the connectors themselves and also the NSBU switch. I have been reading that they have a high failure rate due to excessive dirt and moisture.

Let's hope this stays simple....
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Old 02-28-2021, 10:23 AM   #23
Bus Nut
 
Join Date: Oct 2019
Location: Wake Forest NC
Posts: 436
Year: 1998
Coachwork: Thomas
Chassis: Vista 3600
Engine: T444E
Rated Cap: 24000 lbs
Just confirming

Check trans light did a KOST (Key on self test)

But then you tried again and it now does NOT do a KOST?

that is odd

and this TCM is just one that you randomly grabbed and slapped in? Or was it programmed for the bus and it's engine?

I'm no guru, but is it possible if you just simply slapped in a random TCM that you have a programming issue?

This is the **** I basically did when I did my transmission swap, but my donor bus was same engine so I got away with it.
RolesvilleMarina is offline   Reply With Quote
Old 03-01-2021, 10:21 AM   #24
Bus Nut
 
Join Date: May 2015
Location: Miami, Fl.
Posts: 357
Year: 1999
Chassis: Amtran / International
Engine: DT466E-Md3060
Quote:
Originally Posted by RolesvilleMarina View Post
Just confirming

Check trans light did a KOST (Key on self test)

But then you tried again and it now does NOT do a KOST?

that is odd

and this TCM is just one that you randomly grabbed and slapped in? Or was it programmed for the bus and it's engine?

I'm no guru, but is it possible if you just simply slapped in a random TCM that you have a programming issue?

This is the **** I basically did when I did my transmission swap, but my donor bus was same engine so I got away with it.
Thanks for asking...
My helper incorrectly told me the Check Trans light did come on, it doesn't.

The replacement TCM did come from a 2002 DT466E, the tcm is also labeld for a dt466. The bus is a 2000.

The good thing is that the fuse does not pop anymore but I'm afraid we will have to check the wiring next.

It would be great if I could find someone with a kent-moore breakout box so I can test both TCM's... but I guess I'll just buy lotto tickets instead.

I'm new to all this tranny troubleshooting....
I was at first thinking maybe the NSBU switch might be bad, but then I was thinking the check trans light should come on.... and it does not.
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