Eaton ultrashift glitch KW T880

Constant powers to the TECU are wired direct to the battery.

I'm curious, with the ignition off is there any voltage on the ignition power supply at the TECU? If possible can you back probe the ignition power when its acting up?

I would contact the Eaton call center and run it by them. If it been seen before, they should know the fix.

 

Did not know about the Eaton call center. Thanks again.

 

1-800-826-HELP
1-800-826-4357

Expect long wait times. Make sure you have all of your information ready when you call.

 

As Goodysnap is alluding to......i think you have backfed current on the "key switch" wire of that TECU. If you have a schematic for that truck find the "keys switched" power wire and check to see if you have power on it with the ignition off, if you do, work your way back up the harness checking till you the issue. Could be something as simple as water in a connector to a bad ground in that circuit.

 

I’ve experienced a similar issue twice. I tracked it down to me putting the transmission into neutral then shutting off the truck before it came to a complete stop. Confused the heck out of something in the transmission ecu.

 

I believe the ** is loss of datalink connection with Trans ECU. I have repaired couple T880 chassis with a bad factory splices on the V CAN. "Splice" is near firewall in harness. About 6 inch long section of heat shrink tubing over it, wires are literally just twisted together, then heat shrink put over them.

 

Warning, the on hold music will play in your head for days!

 

LoL....

I swear thats like a 30 second loop. Annoying as all get out.

Change the station.